[unix-history] / usr / src / sys / nfs / nfsm_subs.h

/*
 * Copyright (c) 1989 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 are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	@(#)nfsm_subs.h	7.9 (Berkeley) %G%
 */

/*
 * 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	NFSMGETHDR(m) \
		MGETHDR(m, M_WAIT, MT_DATA); \
		(m)->m_pkthdr.len = 0; \
		(m)->m_pkthdr.rcvif = (struct ifnet *)0
#define	NFSMINOFF(m) \
		if (M_HASCL(m)) \
			(m)->m_data = (m)->m_ext.ext_buf; \
		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.
 */

#ifndef lint
#define	nfsm_build(a,c,s) \
		t1 = NFSMSIZ(mb); \
		if ((s) > (t1-mb->m_len)) { \
			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)
#else /* lint */
#define	nfsm_build(a,c,s) \
		t1 = NFSMSIZ(mb); \
		if ((s) > (t1-mb->m_len)) { \
			MGET(mb2, M_WAIT, MT_DATA); \
			mb->m_next = mb2; \
			mb = mb2; \
			mb->m_len = 0; \
			bpos = mtod(mb, caddr_t); \
		} \
		(a) = (c)(bpos); \
		mb->m_len += (s); \
		bpos += (s)
#endif /* lint */

#define	nfsm_disect(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, TRUE, &cp2)) { \
			m_freem(mrep); \
			goto nfsmout; \
		} else { \
			(a) = (c)cp2; \
		}

#define	nfsm_disecton(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, FALSE, &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_disect(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_disect(p,u_long *,NFSX_UNSIGNED); \
		if (((s) = fxdr_unsigned(long,*p)) > (m)) { \
			m_freem(mrep); \
			error = EBADRPC; \
			goto nfsmout; \
		}

#define	nfsm_srvstrsiz(s,m) \
		nfsm_disect(p,u_long *,NFSX_UNSIGNED); \
		if (((s) = fxdr_unsigned(long,*p)) > (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(a,c,s) \
		if ((mreq = nfsm_reqh(nfs_prog,nfs_vers,(a),(c),(s),&bpos,&mb,&xid)) == NULL) { \
			error = ENOBUFS; \
			goto nfsmout; \
		}

#define nfsm_reqdone	m_freem(mrep); \
		nfsmout: 

#define nfsm_rndup(a)	(((a)+3)&(~0x3))

#define	nfsm_request(v, t, p, h)	\
		if (error = nfs_request((v), mreq, xid, (t), (p), (h), \
		   (v)->v_mount, &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<=(NFSMSIZ(mb)-mb->m_len)){ \
			nfsm_build(p,u_long *,t2); \
			*p++ = txdr_unsigned(s); \
			*(p+((t2>>2)-2)) = 0; \
			bcopy((caddr_t)(a), (caddr_t)p, (s)); \
		} else if (error = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \
			m_freem(mreq); \
			goto nfsmout; \
		}

#define	nfsm_srvdone \
		nfsmout: \
		return(error)

#ifndef lint
#define	nfsm_reply(s) \
		{ \
		*repstat = error; \
		if (error) \
			nfs_rephead(0, xid, error, mrq, &mb, &bpos); \
		else \
			nfs_rephead((s), xid, error, mrq, &mb, &bpos); \
		m_freem(mrep); \
		mreq = *mrq; \
		if (error) \
			return(0); \
		}
#else	/* lint */
#define	nfsm_reply(s) \
		{ \
		*repstat = error; \
		if (error) \
			nfs_rephead(0, xid, error, mrq, &mb, &bpos); \
		else \
			nfs_rephead((s), xid, error, mrq, &mb, &bpos); \
		m_freem(mrep); \
		mreq = *mrq; \
		mrep = mreq; \
		if (error) \
			return(0); \
		}
#endif	/* lint */

#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_disecton(p, u_long *, NFSX_FH); \
		bcopy((caddr_t)p, (caddr_t)f, NFSX_FH)

#define	nfsm_clget \
		if (bp >= be) { \
			MGET(mp, M_WAIT, MT_DATA); \
			MCLGET(mp, M_WAIT); \
			mp->m_len = NFSMSIZ(mp); \
			if (mp3 == NULL) \
				mp3 = mp2 = mp; \
			else { \
				mp2->m_next = mp; \
				mp2 = mp; \
			} \
			bp = mtod(mp, caddr_t); \
			be = bp+mp->m_len; \
		} \
		p = (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); \
	fp->fa_size = txdr_unsigned(vap->va_size); \
	fp->fa_blocksize = txdr_unsigned(vap->va_blocksize); \
	if (vap->va_type == VFIFO) \
		fp->fa_rdev = 0xffffffff; \
	else \
		fp->fa_rdev = txdr_unsigned(vap->va_rdev); \
	fp->fa_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \
	fp->fa_fsid = txdr_unsigned(vap->va_fsid); \
	fp->fa_fileid = txdr_unsigned(vap->va_fileid); \
	fp->fa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); \
	fp->fa_atime.tv_usec = txdr_unsigned(vap->va_flags); \
	txdr_time(&vap->va_mtime, &fp->fa_mtime); \
	fp->fa_ctime.tv_sec = txdr_unsigned(vap->va_ctime.tv_sec); \
	fp->fa_ctime.tv_usec = txdr_unsigned(vap->va_gen)
Commit	Line	Data
a2907882 KM	1	/*
	2	* Copyright (c) 1989 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Rick Macklem at The University of Guelph.
	7	*
	8	* Redistribution and use in source and binary forms are permitted
	9	* provided that the above copyright notice and this paragraph are
	10	* duplicated in all such forms and that any documentation,
	11	* advertising materials, and other materials related to such
	12	* distribution and use acknowledge that the software was developed
	13	* by the University of California, Berkeley. The name of the
	14	* University may not be used to endorse or promote products derived
	15	* from this software without specific prior written permission.
	16	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	17	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	18	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	19	*
170bfd05	20	* @(#)nfsm_subs.h 7.9 (Berkeley) %G%
a2907882 KM	21	*/
	22
	23	/*
	24	* These macros do strange and peculiar things to mbuf chains for
	25	* the assistance of the nfs code. To attempt to use them for any
	26	* other purpose will be dangerous. (they make weird assumptions)
	27	*/
	28
	29	/*
	30	* First define what the actual subs. return
	31	*/
0bd503ad	32	extern struct mbuf *nfsm_reqh();
a2907882	33
a2907882	34	#define M_HASCL(m) ((m)->m_flags & M_EXT)
a2907882 KM	35	#define NFSMGETHDR(m) \
	36	MGETHDR(m, M_WAIT, MT_DATA); \
	37	(m)->m_pkthdr.len = 0; \
	38	(m)->m_pkthdr.rcvif = (struct ifnet *)0
	39	#define NFSMINOFF(m) \
	40	if (M_HASCL(m)) \
	41	(m)->m_data = (m)->m_ext.ext_buf; \
	42	else \
	43	(m)->m_data = (m)->m_dat
	44	#define NFSMADV(m, s) (m)->m_data += (s)
36c3043b	45	#define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \
a2907882	46	(((m)->m_flags & M_PKTHDR)?MHLEN:MLEN))
a2907882 KM	47
	48	/*
	49	* Now for the macros that do the simple stuff and call the functions
	50	* for the hard stuff.
	51	* These macros use several vars. declared in nfsm_reqhead and these
	52	* vars. must not be used elsewhere unless you are careful not to corrupt
	53	* them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
	54	* that may be used so long as the value is not expected to retained
	55	* after a macro.
	56	* I know, this is kind of dorkey, but it makes the actual op functions
	57	* fairly clean and deals with the mess caused by the xdr discriminating
	58	* unions.
	59	*/
	60
0bd503ad	61	#ifndef lint
a2907882 KM	62	#define nfsm_build(a,c,s) \
	63	t1 = NFSMSIZ(mb); \
	64	if ((s) > (t1-mb->m_len)) { \
	65	MGET(mb2, M_WAIT, MT_DATA); \
	66	if ((s) > MLEN) \
	67	panic("build > MLEN"); \
	68	mb->m_next = mb2; \
	69	mb = mb2; \
	70	mb->m_len = 0; \
	71	bpos = mtod(mb, caddr_t); \
	72	} \
	73	(a) = (c)(bpos); \
	74	mb->m_len += (s); \
	75	bpos += (s)
0bd503ad KM	76	#else /* lint */
	77	#define nfsm_build(a,c,s) \
	78	t1 = NFSMSIZ(mb); \
	79	if ((s) > (t1-mb->m_len)) { \
	80	MGET(mb2, M_WAIT, MT_DATA); \
	81	mb->m_next = mb2; \
	82	mb = mb2; \
	83	mb->m_len = 0; \
	84	bpos = mtod(mb, caddr_t); \
	85	} \
	86	(a) = (c)(bpos); \
	87	mb->m_len += (s); \
	88	bpos += (s)
	89	#endif /* lint */
a2907882 KM	90
	91	#define nfsm_disect(a,c,s) \
	92	t1 = mtod(md, caddr_t)+md->m_len-dpos; \
	93	if (t1 >= (s)) { \
	94	(a) = (c)(dpos); \
	95	dpos += (s); \
	96	} else if (error = nfsm_disct(&md, &dpos, (s), t1, TRUE, &cp2)) { \
	97	m_freem(mrep); \
	98	goto nfsmout; \
	99	} else { \
	100	(a) = (c)cp2; \
	101	}
	102
	103	#define nfsm_disecton(a,c,s) \
	104	t1 = mtod(md, caddr_t)+md->m_len-dpos; \
	105	if (t1 >= (s)) { \
	106	(a) = (c)(dpos); \
	107	dpos += (s); \
	108	} else if (error = nfsm_disct(&md, &dpos, (s), t1, FALSE, &cp2)) { \
	109	m_freem(mrep); \
	110	goto nfsmout; \
	111	} else { \
	112	(a) = (c)cp2; \
	113	}
	114
	115	#define nfsm_fhtom(v) \
	116	nfsm_build(cp,caddr_t,NFSX_FH); \
	117	bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH)
	118
	119	#define nfsm_srvfhtom(f) \
	120	nfsm_build(cp,caddr_t,NFSX_FH); \
	121	bcopy((caddr_t)(f), cp, NFSX_FH)
	122
	123	#define nfsm_mtofh(d,v) \
	124	{ struct nfsnode np; nfsv2fh_t fhp; \
	125	nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); \
	126	if (error = nfs_nget((d)->v_mount, fhp, &np)) { \
	127	m_freem(mrep); \
	128	goto nfsmout; \
	129	} \
	130	(v) = NFSTOV(np); \
	131	nfsm_loadattr(v, (struct vattr *)0); \
a2907882 KM	132	}
	133
	134	#define nfsm_loadattr(v,a) \
0bd503ad KM	135	{ struct vnode *tvp = (v); \
0bd503ad KM	136	if (error = nfs_loadattrcache(&tvp, &md, &dpos, (a))) { \
a2907882 KM	137	m_freem(mrep); \
a2907882 KM	138	goto nfsmout; \
0bd503ad KM	139	} \
0bd503ad KM	140	(v) = tvp; }
a2907882 KM	141
	142	#define nfsm_strsiz(s,m) \
	143	nfsm_disect(p,u_long *,NFSX_UNSIGNED); \
	144	if (((s) = fxdr_unsigned(long,*p)) > (m)) { \
	145	m_freem(mrep); \
	146	error = EBADRPC; \
	147	goto nfsmout; \
	148	}
	149
	150	#define nfsm_srvstrsiz(s,m) \
	151	nfsm_disect(p,u_long *,NFSX_UNSIGNED); \
	152	if (((s) = fxdr_unsigned(long,*p)) > (m) \|\| (s) <= 0) { \
	153	error = EBADRPC; \
	154	nfsm_reply(0); \
	155	}
	156
a2907882 KM	157	#define nfsm_mtouio(p,s) \
	158	if ((s) > 0 && \
	159	(error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \
	160	m_freem(mrep); \
	161	goto nfsmout; \
	162	}
	163
	164	#define nfsm_uiotom(p,s) \
	165	if (error = nfsm_uiotombuf((p),&mb,(s),&bpos)) { \
	166	m_freem(mreq); \
	167	goto nfsmout; \
	168	}
	169
	170	#define nfsm_reqhead(a,c,s) \
	171	if ((mreq = nfsm_reqh(nfs_prog,nfs_vers,(a),(c),(s),&bpos,&mb,&xid)) == NULL) { \
	172	error = ENOBUFS; \
	173	goto nfsmout; \
	174	}
	175
a2907882 KM	176	#define nfsm_reqdone m_freem(mrep); \
	177	nfsmout:
	178
	179	#define nfsm_rndup(a) (((a)+3)&(~0x3))
	180
170bfd05 KM	181	#define nfsm_request(v, t, p, h) \
170bfd05 KM	182	if (error = nfs_request((v), mreq, xid, (t), (p), (h), \
a2907882 KM	183	(v)->v_mount, &mrep, &md, &dpos)) \
	184	goto nfsmout
	185
	186	#define nfsm_strtom(a,s,m) \
	187	if ((s) > (m)) { \
	188	m_freem(mreq); \
	189	error = ENAMETOOLONG; \
	190	goto nfsmout; \
	191	} \
	192	t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \
	193	if(t2<=(NFSMSIZ(mb)-mb->m_len)){ \
	194	nfsm_build(p,u_long *,t2); \
	195	*p++ = txdr_unsigned(s); \
	196	*(p+((t2>>2)-2)) = 0; \
	197	bcopy((caddr_t)(a), (caddr_t)p, (s)); \
	198	} else if (error = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \
	199	m_freem(mreq); \
	200	goto nfsmout; \
	201	}
	202
a2907882 KM	203	#define nfsm_srvdone \
	204	nfsmout: \
	205	return(error)
	206
66435314 KM	207	#ifndef lint
	208	#define nfsm_reply(s) \
	209	{ \
	210	*repstat = error; \
	211	if (error) \
	212	nfs_rephead(0, xid, error, mrq, &mb, &bpos); \
	213	else \
	214	nfs_rephead((s), xid, error, mrq, &mb, &bpos); \
	215	m_freem(mrep); \
	216	mreq = *mrq; \
	217	if (error) \
	218	return(0); \
	219	}
	220	#else /* lint */
a2907882 KM	221	#define nfsm_reply(s) \
a2907882 KM	222	{ \
66435314	223	*repstat = error; \
a2907882 KM	224	if (error) \
	225	nfs_rephead(0, xid, error, mrq, &mb, &bpos); \
	226	else \
	227	nfs_rephead((s), xid, error, mrq, &mb, &bpos); \
	228	m_freem(mrep); \
66435314 KM	229	mreq = *mrq; \
66435314 KM	230	mrep = mreq; \
a2907882 KM	231	if (error) \
	232	return(0); \
	233	}
66435314	234	#endif /* lint */
a2907882 KM	235
	236	#define nfsm_adv(s) \
	237	t1 = mtod(md, caddr_t)+md->m_len-dpos; \
	238	if (t1 >= (s)) { \
	239	dpos += (s); \
	240	} else if (error = nfs_adv(&md, &dpos, (s), t1)) { \
	241	m_freem(mrep); \
	242	goto nfsmout; \
	243	}
	244
	245	#define nfsm_srvmtofh(f) \
	246	nfsm_disecton(p, u_long *, NFSX_FH); \
	247	bcopy((caddr_t)p, (caddr_t)f, NFSX_FH)
	248
	249	#define nfsm_clget \
	250	if (bp >= be) { \
	251	MGET(mp, M_WAIT, MT_DATA); \
f0f1cbaa	252	MCLGET(mp, M_WAIT); \
a2907882 KM	253	mp->m_len = NFSMSIZ(mp); \
	254	if (mp3 == NULL) \
	255	mp3 = mp2 = mp; \
	256	else { \
	257	mp2->m_next = mp; \
	258	mp2 = mp; \
	259	} \
	260	bp = mtod(mp, caddr_t); \
	261	be = bp+mp->m_len; \
	262	} \
	263	p = (u_long *)bp
	264
66435314 KM	265	#define nfsm_srvfillattr \
	266	fp->fa_type = vtonfs_type(vap->va_type); \
	267	fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \
	268	fp->fa_nlink = txdr_unsigned(vap->va_nlink); \
	269	fp->fa_uid = txdr_unsigned(vap->va_uid); \
	270	fp->fa_gid = txdr_unsigned(vap->va_gid); \
	271	fp->fa_size = txdr_unsigned(vap->va_size); \
	272	fp->fa_blocksize = txdr_unsigned(vap->va_blocksize); \
d4e5799e KM	273	if (vap->va_type == VFIFO) \
	274	fp->fa_rdev = 0xffffffff; \
	275	else \
	276	fp->fa_rdev = txdr_unsigned(vap->va_rdev); \
	277	fp->fa_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \
66435314 KM	278	fp->fa_fsid = txdr_unsigned(vap->va_fsid); \
	279	fp->fa_fileid = txdr_unsigned(vap->va_fileid); \
	280	fp->fa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); \
	281	fp->fa_atime.tv_usec = txdr_unsigned(vap->va_flags); \
	282	txdr_time(&vap->va_mtime, &fp->fa_mtime); \
	283	fp->fa_ctime.tv_sec = txdr_unsigned(vap->va_ctime.tv_sec); \
	284	fp->fa_ctime.tv_usec = txdr_unsigned(vap->va_gen)
	285