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nfsm_subs.h revision 1.47
      1 /*	$NetBSD: nfsm_subs.h,v 1.47 2006/09/02 12:40:36 yamt Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1989, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Rick Macklem at The University of Guelph.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	@(#)nfsm_subs.h	8.2 (Berkeley) 3/30/95
     35  */
     36 
     37 
     38 #ifndef _NFS_NFSM_SUBS_H_
     39 #define _NFS_NFSM_SUBS_H_
     40 
     41 
     42 /*
     43  * These macros do strange and peculiar things to mbuf chains for
     44  * the assistance of the nfs code. To attempt to use them for any
     45  * other purpose will be dangerous. (they make weird assumptions)
     46  */
     47 
     48 /*
     49  * First define what the actual subs. return
     50  */
     51 
     52 #define	M_HASCL(m)	((m)->m_flags & M_EXT)
     53 #define	NFSMADV(m, s)	(m)->m_data += (s)
     54 #define	NFSMSIZ(m)	((M_HASCL(m)) ? (m)->m_ext.ext_size : \
     55 				(((m)->m_flags & M_PKTHDR) ? MHLEN : MLEN))
     56 
     57 /*
     58  * Now for the macros that do the simple stuff and call the functions
     59  * for the hard stuff.
     60  * These macros use several vars. declared in nfsm_reqhead and these
     61  * vars. must not be used elsewhere unless you are careful not to corrupt
     62  * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
     63  * that may be used so long as the value is not expected to retained
     64  * after a macro.
     65  * I know, this is kind of dorkey, but it makes the actual op functions
     66  * fairly clean and deals with the mess caused by the xdr discriminating
     67  * unions.
     68  */
     69 
     70 #define	nfsm_build(a,c,s) \
     71 		{ if ((s) > M_TRAILINGSPACE(mb)) { \
     72 			struct mbuf *mb2; \
     73 			mb2 = m_get(M_WAIT, MT_DATA); \
     74 			MCLAIM(mb2, &nfs_mowner); \
     75 			if ((s) > MLEN) \
     76 				panic("build > MLEN"); \
     77 			mb->m_next = mb2; \
     78 			mb = mb2; \
     79 			mb->m_len = 0; \
     80 			bpos = mtod(mb, caddr_t); \
     81 		} \
     82 		(a) = (c)(bpos); \
     83 		mb->m_len += (s); \
     84 		bpos += (s); }
     85 
     86 #define nfsm_aligned(p) ALIGNED_POINTER(p,u_int32_t)
     87 
     88 #define	nfsm_dissect(a, c, s) \
     89 		{ t1 = mtod(md, caddr_t)+md->m_len-dpos; \
     90 		if (t1 >= (s) && nfsm_aligned(dpos)) { \
     91 			(a) = (c)(dpos); \
     92 			dpos += (s); \
     93 		} else if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \
     94 			error = t1; \
     95 			m_freem(mrep); \
     96 			goto nfsmout; \
     97 		} else { \
     98 			(a) = (c)cp2; \
     99 		} }
    100 
    101 #define nfsm_fhtom(n, v3) \
    102 	      { if (v3) { \
    103 			t2 = nfsm_rndup((n)->n_fhsize) + NFSX_UNSIGNED; \
    104 			if (t2 <= M_TRAILINGSPACE(mb)) { \
    105 				nfsm_build(tl, u_int32_t *, t2); \
    106 				*tl++ = txdr_unsigned((n)->n_fhsize); \
    107 				*(tl + ((t2>>2) - 2)) = 0; \
    108 				memcpy((caddr_t)tl,(caddr_t)(n)->n_fhp, \
    109 					(n)->n_fhsize); \
    110 			} else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \
    111 				(caddr_t)(n)->n_fhp, \
    112 				  (n)->n_fhsize)) != 0) { \
    113 				error = t2; \
    114 				m_freem(mreq); \
    115 				goto nfsmout; \
    116 			} \
    117 		} else { \
    118 			nfsm_build(cp, caddr_t, NFSX_V2FH); \
    119 			memcpy(cp, (caddr_t)(n)->n_fhp, NFSX_V2FH); \
    120 		} }
    121 
    122 #define nfsm_srvfhtom(f, v3) \
    123 		{ if (v3) { \
    124 			nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + \
    125 			    NFSRVFH_SIZE(f)); \
    126 			*tl++ = txdr_unsigned(NFSRVFH_SIZE(f)); \
    127 			memcpy(tl, NFSRVFH_DATA(f), NFSRVFH_SIZE(f)); \
    128 		} else { \
    129 			KASSERT(NFSRVFH_SIZE(f) == NFSX_V2FH); \
    130 			nfsm_build(cp, caddr_t, NFSX_V2FH); \
    131 			memcpy(cp, NFSRVFH_DATA(f), NFSX_V2FH); \
    132 		} }
    133 
    134 #define nfsm_srvpostop_fh(f) \
    135 		{ nfsm_build(tl, u_int32_t *, \
    136 		    2 * NFSX_UNSIGNED + NFSRVFH_SIZE(f)); \
    137 		*tl++ = nfs_true; \
    138 		*tl++ = txdr_unsigned(NFSRVFH_SIZE(f)); \
    139 		memcpy(tl, NFSRVFH_DATA(f), NFSRVFH_SIZE(f)); \
    140 		}
    141 
    142 /*
    143  * nfsm_mtofh: dissect a "resulted obj" part of create-like operations
    144  * like mkdir.
    145  *
    146  * for nfsv3, dissect post_op_fh3 and following post_op_attr.
    147  * for nfsv2, dissect fhandle and following fattr.
    148  *
    149  * d: (IN) the vnode of the parent directry.
    150  * v: (OUT) the corresponding vnode (we allocate one if needed)
    151  * v3: (IN) true for nfsv3.
    152  * f: (OUT) true if we got valid filehandle.  always true for nfsv2.
    153  */
    154 
    155 #define nfsm_mtofh(d, v, v3, f) \
    156 		{ struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \
    157 		int hasattr = 0; \
    158 		if (v3) { \
    159 			nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    160 			(f) = fxdr_unsigned(int, *tl); \
    161 		} else { \
    162 			(f) = 1; \
    163 			hasattr = 1; \
    164 		} \
    165 		if (f) { \
    166 			nfsm_getfh(ttfhp, ttfhsize, (v3)); \
    167 			if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \
    168 				&ttnp)) != 0) { \
    169 				error = t1; \
    170 				m_freem(mrep); \
    171 				goto nfsmout; \
    172 			} \
    173 			(v) = NFSTOV(ttnp); \
    174 		} \
    175 		if (v3) { \
    176 			nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    177 			if (f) \
    178 				hasattr = fxdr_unsigned(int, *tl); \
    179 			else if (fxdr_unsigned(int, *tl)) \
    180 				nfsm_adv(NFSX_V3FATTR); \
    181 		} \
    182 		if (f && hasattr) \
    183 			nfsm_loadattr((v), (struct vattr *)0, 0); \
    184 		}
    185 
    186 /*
    187  * nfsm_getfh: dissect a filehandle.
    188  *
    189  * f: (OUT) a filehandle.
    190  * s: (OUT) size of the filehandle in bytes.
    191  * v3: (IN) true if nfsv3.
    192  */
    193 
    194 #define nfsm_getfh(f, s, v3) \
    195 		{ if (v3) { \
    196 			nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    197 			if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \
    198 				(s) > NFSX_V3FHMAX) { \
    199 				m_freem(mrep); \
    200 				error = EBADRPC; \
    201 				goto nfsmout; \
    202 			} \
    203 		} else \
    204 			(s) = NFSX_V2FH; \
    205 		nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); }
    206 
    207 #define	nfsm_loadattr(v, a, flags) \
    208 		{ struct vnode *ttvp = (v); \
    209 		if ((t1 = nfsm_loadattrcache(&ttvp, &md, &dpos, (a), (flags))) \
    210 		    != 0) { \
    211 			error = t1; \
    212 			m_freem(mrep); \
    213 			goto nfsmout; \
    214 		} \
    215 		(v) = ttvp; }
    216 
    217 /*
    218  * nfsm_postop_attr: process nfsv3 post_op_attr
    219  *
    220  * dissect post_op_attr.  if we got a one,
    221  * call nfsm_loadattrcache to update attribute cache.
    222  *
    223  * v: (IN/OUT) the corresponding vnode
    224  * f: (OUT) true if we got valid attribute
    225  * flags: (IN) flags for nfsm_loadattrcache
    226  */
    227 
    228 #define	nfsm_postop_attr(v, f, flags) \
    229 		{ struct vnode *ttvp = (v); \
    230 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    231 		if (((f) = fxdr_unsigned(int, *tl)) != 0) { \
    232 			if ((t1 = nfsm_loadattrcache(&ttvp, &md, &dpos, \
    233 				(struct vattr *)0, (flags))) != 0) { \
    234 				error = t1; \
    235 				(f) = 0; \
    236 				m_freem(mrep); \
    237 				goto nfsmout; \
    238 			} \
    239 			(v) = ttvp; \
    240 		} }
    241 
    242 /*
    243  * nfsm_wcc_data: process nfsv3 wcc_data
    244  *
    245  * dissect pre_op_attr and then let nfsm_postop_attr dissect post_op_attr.
    246  *
    247  * v: (IN/OUT) the corresponding vnode
    248  * f: (IN/OUT)
    249  *	NFSV3_WCCRATTR	return true if we got valid post_op_attr.
    250  *	NFSV3_WCCCHK	return true if pre_op_attr's mtime is the same
    251  *			as our n_mtime.  (ie. our cache isn't stale.)
    252  * flags: (IN) flags for nfsm_loadattrcache
    253  * docheck: (IN) TRUE if timestamp change is expected
    254  */
    255 
    256 /* Used as (f) for nfsm_wcc_data() */
    257 #define NFSV3_WCCRATTR	0
    258 #define NFSV3_WCCCHK	1
    259 
    260 #define	nfsm_wcc_data(v, f, flags, docheck) \
    261 		{ int ttattrf, ttretf = 0, renewctime = 0, renewnctime = 0; \
    262 		struct timespec ctime, mtime; \
    263 		struct nfsnode *nfsp = VTONFS(v); \
    264 		boolean_t haspreopattr = FALSE; \
    265 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    266 		if (*tl == nfs_true) { \
    267 			haspreopattr = TRUE; \
    268 			nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \
    269 			fxdr_nfsv3time(tl + 2, &mtime); \
    270 			fxdr_nfsv3time(tl + 4, &ctime); \
    271 			if (nfsp->n_ctime == ctime.tv_sec) \
    272 				renewctime = 1; \
    273 			if ((v)->v_type == VDIR) { \
    274 				if (timespeccmp(&nfsp->n_nctime, &ctime, ==)) \
    275 					renewnctime = 1; \
    276 			} \
    277 			if (f) { \
    278 				ttretf = timespeccmp(&nfsp->n_mtime, &mtime, ==);\
    279 			} \
    280 		} \
    281 		nfsm_postop_attr((v), ttattrf, (flags)); \
    282 		nfsp = VTONFS(v); \
    283 		if (ttattrf) { \
    284 			if (haspreopattr && \
    285 			    nfs_check_wccdata(nfsp, &ctime, &mtime, (docheck))) \
    286 				renewctime = renewnctime = ttretf = 0; \
    287 			if (renewctime) \
    288 				nfsp->n_ctime = nfsp->n_vattr->va_ctime.tv_sec; \
    289 			if (renewnctime) \
    290 				nfsp->n_nctime = nfsp->n_vattr->va_ctime; \
    291 		} \
    292 		if (f) { \
    293 			(f) = ttretf; \
    294 		} else { \
    295 			(f) = ttattrf; \
    296 		} }
    297 
    298 /* If full is true, set all fields, otherwise just set mode and time fields */
    299 #define nfsm_v3attrbuild(a, full)						\
    300 		{ if ((a)->va_mode != (mode_t)VNOVAL) {				\
    301 			nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);		\
    302 			*tl++ = nfs_true;					\
    303 			*tl = txdr_unsigned((a)->va_mode);			\
    304 		} else {							\
    305 			nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);		\
    306 			*tl = nfs_false;					\
    307 		}								\
    308 		if ((full) && (a)->va_uid != (uid_t)VNOVAL) {			\
    309 			nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);		\
    310 			*tl++ = nfs_true;					\
    311 			*tl = txdr_unsigned((a)->va_uid);			\
    312 		} else {							\
    313 			nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);		\
    314 			*tl = nfs_false;					\
    315 		}								\
    316 		if ((full) && (a)->va_gid != (gid_t)VNOVAL) {			\
    317 			nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);		\
    318 			*tl++ = nfs_true;					\
    319 			*tl = txdr_unsigned((a)->va_gid);			\
    320 		} else {							\
    321 			nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);		\
    322 			*tl = nfs_false;					\
    323 		}								\
    324 		if ((full) && (a)->va_size != VNOVAL) {				\
    325 			nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);		\
    326 			*tl++ = nfs_true;					\
    327 			txdr_hyper((a)->va_size, tl);				\
    328 		} else {							\
    329 			nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);		\
    330 			*tl = nfs_false;					\
    331 		}								\
    332 		if ((a)->va_atime.tv_sec != VNOVAL) {				\
    333 			if ((a)->va_atime.tv_sec != time_second) {		\
    334 				nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);	\
    335 				*tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);	\
    336 				txdr_nfsv3time(&(a)->va_atime, tl);		\
    337 			} else {						\
    338 				nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);	\
    339 				*tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);	\
    340 			}							\
    341 		} else {							\
    342 			nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);		\
    343 			*tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);		\
    344 		}								\
    345 		if ((a)->va_mtime.tv_sec != VNOVAL) {				\
    346 			if ((a)->va_mtime.tv_sec != time_second) {		\
    347 				nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);	\
    348 				*tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);	\
    349 				txdr_nfsv3time(&(a)->va_mtime, tl);		\
    350 			} else {						\
    351 				nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);	\
    352 				*tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);	\
    353 			}							\
    354 		} else {							\
    355 			nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);		\
    356 			*tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);		\
    357 		}								\
    358 		}
    359 
    360 
    361 #define	nfsm_strsiz(s,m) \
    362 		{ nfsm_dissect(tl,uint32_t *,NFSX_UNSIGNED); \
    363 		if (((s) = fxdr_unsigned(uint32_t,*tl)) > (m)) { \
    364 			m_freem(mrep); \
    365 			error = EBADRPC; \
    366 			goto nfsmout; \
    367 		} }
    368 
    369 #define	nfsm_srvnamesiz(s) \
    370 		{ nfsm_dissect(tl,uint32_t *,NFSX_UNSIGNED); \
    371 		if (((s) = fxdr_unsigned(uint32_t,*tl)) > NFS_MAXNAMLEN) \
    372 			error = NFSERR_NAMETOL; \
    373 		if (error) \
    374 			nfsm_reply(0); \
    375 		}
    376 
    377 #define nfsm_mtouio(p,s) \
    378 		if ((s) > 0 && \
    379 		   (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \
    380 			error = t1; \
    381 			m_freem(mrep); \
    382 			goto nfsmout; \
    383 		}
    384 
    385 #define nfsm_uiotom(p,s) \
    386 		if ((t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) != 0) { \
    387 			error = t1; \
    388 			m_freem(mreq); \
    389 			goto nfsmout; \
    390 		}
    391 
    392 #define	nfsm_reqhead(n,a,s) \
    393 		mb = mreq = nfsm_reqh((n),(a),(s),&bpos)
    394 
    395 #define nfsm_reqdone	m_freem(mrep); \
    396 		nfsmout:
    397 
    398 #define nfsm_rndup(a)	(((a)+3)&(~0x3))
    399 #define nfsm_padlen(a)	(nfsm_rndup(a) - (a))
    400 
    401 #define	nfsm_request1(v, t, p, c, rexmitp)	\
    402 		if ((error = nfs_request((v), mreq, (t), (p), \
    403 		   (c), &mrep, &md, &dpos, (rexmitp))) != 0) { \
    404 			if (error & NFSERR_RETERR) \
    405 				error &= ~NFSERR_RETERR; \
    406 			else \
    407 				goto nfsmout; \
    408 		}
    409 
    410 #define	nfsm_request(v, t, p, c)	nfsm_request1((v), (t), (p), (c), NULL)
    411 
    412 #define	nfsm_strtom(a,s,m) \
    413 		if ((s) > (m)) { \
    414 			m_freem(mreq); \
    415 			error = ENAMETOOLONG; \
    416 			goto nfsmout; \
    417 		} \
    418 		t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \
    419 		if (t2 <= M_TRAILINGSPACE(mb)) { \
    420 			nfsm_build(tl,u_int32_t *,t2); \
    421 			*tl++ = txdr_unsigned(s); \
    422 			*(tl+((t2>>2)-2)) = 0; \
    423 			memcpy((caddr_t)tl, (const char *)(a), (s)); \
    424 		} else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \
    425 			error = t2; \
    426 			m_freem(mreq); \
    427 			goto nfsmout; \
    428 		}
    429 
    430 #define	nfsm_srvdone \
    431 		nfsmout: \
    432 		return(error)
    433 
    434 #define	nfsm_reply(s) \
    435 		{ \
    436 		nfsd->nd_repstat = error; \
    437 		if (error && !(nfsd->nd_flag & ND_NFSV3)) \
    438 		   (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \
    439 			mrq, &mb, &bpos); \
    440 		else \
    441 		   (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \
    442 			mrq, &mb, &bpos); \
    443 		if (mrep != NULL) { \
    444 			m_freem(mrep); \
    445 			mrep = NULL; \
    446 		} \
    447 		mreq = *mrq; \
    448 		if (error && (!(nfsd->nd_flag & ND_NFSV3) || \
    449 			error == EBADRPC)) \
    450 			return(0); \
    451 		}
    452 
    453 #define	nfsm_writereply(s, v3) \
    454 		{ \
    455 		nfsd->nd_repstat = error; \
    456 		if (error && !(v3)) \
    457 		   (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \
    458 			&mreq, &mb, &bpos); \
    459 		else \
    460 		   (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \
    461 			&mreq, &mb, &bpos); \
    462 		}
    463 
    464 #define	nfsm_adv(s) \
    465 		{ t1 = mtod(md, caddr_t)+md->m_len-dpos; \
    466 		if (t1 >= (s)) { \
    467 			dpos += (s); \
    468 		} else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \
    469 			error = t1; \
    470 			m_freem(mrep); \
    471 			goto nfsmout; \
    472 		} }
    473 
    474 #define nfsm_srvmtofh(nsfh) \
    475 	{ int fhlen = NFSX_V3FH; \
    476 		if (nfsd->nd_flag & ND_NFSV3) { \
    477 			nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    478 			fhlen = fxdr_unsigned(int, *tl); \
    479 			if (fhlen > NFSX_V3FHMAX || \
    480 			    (fhlen < FHANDLE_SIZE_MIN && fhlen > 0)) { \
    481 				error = EBADRPC; \
    482 				nfsm_reply(0); \
    483 			} \
    484 		} else { \
    485 			fhlen = NFSX_V2FH; \
    486 		} \
    487 		(nsfh)->nsfh_size = fhlen; \
    488 		if (fhlen != 0) { \
    489 			nfsm_dissect(tl, u_int32_t *, fhlen); \
    490 			memcpy(NFSRVFH_DATA(nsfh), tl, fhlen); \
    491 		} \
    492 	}
    493 
    494 #define	nfsm_clget \
    495 		if (bp >= be) { \
    496 			if (mp == mb) \
    497 				mp->m_len += bp-bpos; \
    498 			mp = m_get(M_WAIT, MT_DATA); \
    499 			MCLAIM(mp, &nfs_mowner); \
    500 			m_clget(mp, M_WAIT); \
    501 			mp->m_len = NFSMSIZ(mp); \
    502 			mp2->m_next = mp; \
    503 			mp2 = mp; \
    504 			bp = mtod(mp, caddr_t); \
    505 			be = bp+mp->m_len; \
    506 		} \
    507 		tl = (u_int32_t *)bp
    508 
    509 #define	nfsm_srvfillattr(a, f) \
    510 		nfsm_srvfattr(nfsd, (a), (f))
    511 
    512 #define nfsm_srvwcc_data(br, b, ar, a) \
    513 		nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos)
    514 
    515 #define nfsm_srvpostop_attr(r, a) \
    516 		nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos)
    517 
    518 #define nfsm_srvsattr(a) \
    519 		{ \
    520 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    521 		if (*tl == nfs_true) { \
    522 			nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    523 			(a)->va_mode = nfstov_mode(*tl); \
    524 		} \
    525 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    526 		if (*tl == nfs_true) { \
    527 			nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    528 			(a)->va_uid = fxdr_unsigned(uid_t, *tl); \
    529 		} \
    530 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    531 		if (*tl == nfs_true) { \
    532 			nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    533 			(a)->va_gid = fxdr_unsigned(gid_t, *tl); \
    534 		} \
    535 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    536 		if (*tl == nfs_true) { \
    537 			nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
    538 			(a)->va_size = fxdr_hyper(tl); \
    539 		} \
    540 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    541 		switch (fxdr_unsigned(int, *tl)) { \
    542 		case NFSV3SATTRTIME_TOCLIENT: \
    543 			nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
    544 			fxdr_nfsv3time(tl, &(a)->va_atime); \
    545 			break; \
    546 		case NFSV3SATTRTIME_TOSERVER: \
    547 			getnanotime(&(a)->va_atime); \
    548 			(a)->va_vaflags |= VA_UTIMES_NULL; \
    549 			break; \
    550 		}; \
    551 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
    552 		switch (fxdr_unsigned(int, *tl)) { \
    553 		case NFSV3SATTRTIME_TOCLIENT: \
    554 			nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
    555 			fxdr_nfsv3time(tl, &(a)->va_mtime); \
    556 			(a)->va_vaflags &= ~VA_UTIMES_NULL; \
    557 			break; \
    558 		case NFSV3SATTRTIME_TOSERVER: \
    559 			getnanotime(&(a)->va_mtime); \
    560 			(a)->va_vaflags |= VA_UTIMES_NULL; \
    561 			break; \
    562 		}; }
    563 
    564 #endif
    565