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freebsd/sys/nfs/nfsm_subs.h
Peter Wemm c3aac50f28 $Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00

565 lines
15 KiB
C
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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 8.2 (Berkeley) 3/30/95
* $FreeBSD$
*/
#ifndef _NFS_NFSM_SUBS_H_
#define _NFS_NFSM_SUBS_H_
struct ucred;
struct vnode;
/*
* 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
*/
struct mbuf *nfsm_reqh __P((struct vnode *vp, u_long procid, int hsiz,
caddr_t *bposp));
struct mbuf *nfsm_rpchead __P((struct ucred *cr, int nmflag, int procid,
int auth_type, int auth_len, char *auth_str,
int verf_len, char *verf_str,
struct mbuf *mrest, int mrest_len,
struct mbuf **mbp, u_int32_t *xidp));
#define M_HASCL(m) ((m)->m_flags & M_EXT)
#define NFSMINOFF(m) \
do { \
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; \
} while (0)
#define NFSMADV(m, s) \
do { \
(m)->m_data += (s); \
} while (0)
#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) \
do { \
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); \
} while (0)
#define nfsm_dissect(a, c, s) \
do { \
t1 = mtod(md, caddr_t)+md->m_len-dpos; \
if (t1 >= (s)) { \
(a) = (c)(dpos); \
dpos += (s); \
} else if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \
error = t1; \
m_freem(mrep); \
goto nfsmout; \
} else { \
(a) = (c)cp2; \
} \
} while (0)
#define nfsm_fhtom(v, v3) \
do { \
if (v3) { \
t2 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED; \
if (t2 <= M_TRAILINGSPACE(mb)) { \
nfsm_build(tl, u_int32_t *, t2); \
*tl++ = txdr_unsigned(VTONFS(v)->n_fhsize); \
*(tl + ((t2>>2) - 2)) = 0; \
bcopy((caddr_t)VTONFS(v)->n_fhp,(caddr_t)tl, \
VTONFS(v)->n_fhsize); \
} else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \
(caddr_t)VTONFS(v)->n_fhp, \
VTONFS(v)->n_fhsize)) != 0) { \
error = t2; \
m_freem(mreq); \
goto nfsmout; \
} \
} else { \
nfsm_build(cp, caddr_t, NFSX_V2FH); \
bcopy((caddr_t)VTONFS(v)->n_fhp, cp, NFSX_V2FH); \
} \
} while (0)
#define nfsm_srvfhtom(f, v3) \
do { \
if (v3) { \
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FH);\
*tl++ = txdr_unsigned(NFSX_V3FH); \
bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \
} else { \
nfsm_build(cp, caddr_t, NFSX_V2FH); \
bcopy((caddr_t)(f), cp, NFSX_V2FH); \
} \
} while (0)
#define nfsm_srvpostop_fh(f) \
do { \
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED + NFSX_V3FH); \
*tl++ = nfs_true; \
*tl++ = txdr_unsigned(NFSX_V3FH); \
bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \
} while (0)
#define nfsm_mtofh(d, v, v3, f) \
do { \
struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \
if (v3) { \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
(f) = fxdr_unsigned(int, *tl); \
} else \
(f) = 1; \
if (f) { \
nfsm_getfh(ttfhp, ttfhsize, (v3)); \
if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \
&ttnp)) != 0) { \
error = t1; \
m_freem(mrep); \
goto nfsmout; \
} \
(v) = NFSTOV(ttnp); \
} \
if (v3) { \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
if (f) \
(f) = fxdr_unsigned(int, *tl); \
else if (fxdr_unsigned(int, *tl)) \
nfsm_adv(NFSX_V3FATTR); \
} \
if (f) \
nfsm_loadattr((v), (struct vattr *)0); \
} while (0)
#define nfsm_getfh(f, s, v3) \
do { \
if (v3) { \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \
(s) > NFSX_V3FHMAX) { \
m_freem(mrep); \
error = EBADRPC; \
goto nfsmout; \
} \
} else \
(s) = NFSX_V2FH; \
nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); \
} while (0)
#define nfsm_loadattr(v, a) \
do { \
struct vnode *ttvp = (v); \
if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \
error = t1; \
m_freem(mrep); \
goto nfsmout; \
} \
(v) = ttvp; \
} while (0)
#define nfsm_postop_attr(v, f) \
do { \
struct vnode *ttvp = (v); \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
if (((f) = fxdr_unsigned(int, *tl)) != 0) { \
if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \
(struct vattr *)0)) != 0) { \
error = t1; \
(f) = 0; \
m_freem(mrep); \
goto nfsmout; \
} \
(v) = ttvp; \
} \
} while (0)
/* Used as (f) for nfsm_wcc_data() */
#define NFSV3_WCCRATTR 0
#define NFSV3_WCCCHK 1
#define nfsm_wcc_data(v, f) \
do { \
int ttattrf, ttretf = 0; \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
if (*tl == nfs_true) { \
nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \
if (f) \
ttretf = (VTONFS(v)->n_mtime == \
fxdr_unsigned(u_int32_t, *(tl + 2))); \
} \
nfsm_postop_attr((v), ttattrf); \
if (f) { \
(f) = ttretf; \
} else { \
(f) = ttattrf; \
} \
} while (0)
/* If full is true, set all fields, otherwise just set mode and time fields */
#define nfsm_v3attrbuild(a, full) \
do { \
if ((a)->va_mode != (mode_t)VNOVAL) { \
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
*tl++ = nfs_true; \
*tl = txdr_unsigned((a)->va_mode); \
} else { \
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
*tl = nfs_false; \
} \
if ((full) && (a)->va_uid != (uid_t)VNOVAL) { \
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
*tl++ = nfs_true; \
*tl = txdr_unsigned((a)->va_uid); \
} else { \
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
*tl = nfs_false; \
} \
if ((full) && (a)->va_gid != (gid_t)VNOVAL) { \
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
*tl++ = nfs_true; \
*tl = txdr_unsigned((a)->va_gid); \
} else { \
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
*tl = nfs_false; \
} \
if ((full) && (a)->va_size != VNOVAL) { \
nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \
*tl++ = nfs_true; \
txdr_hyper((a)->va_size, tl); \
} else { \
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
*tl = nfs_false; \
} \
if ((a)->va_atime.tv_sec != VNOVAL) { \
if ((a)->va_atime.tv_sec != time_second) { \
nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);\
*tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);\
txdr_nfsv3time(&(a)->va_atime, tl); \
} else { \
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
*tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \
} \
} else { \
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
*tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \
} \
if ((a)->va_mtime.tv_sec != VNOVAL) { \
if ((a)->va_mtime.tv_sec != time_second) { \
nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);\
*tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);\
txdr_nfsv3time(&(a)->va_mtime, tl); \
} else { \
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
*tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \
} \
} else { \
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
*tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \
} \
} while (0)
#define nfsm_strsiz(s,m) \
do { \
nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \
if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \
m_freem(mrep); \
error = EBADRPC; \
goto nfsmout; \
} \
} while (0)
#define nfsm_srvstrsiz(s,m) \
do { \
nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \
if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \
error = EBADRPC; \
nfsm_reply(0); \
} \
} while (0)
#define nfsm_srvnamesiz(s) \
do { \
nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \
if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \
error = NFSERR_NAMETOL; \
if ((s) <= 0) \
error = EBADRPC; \
if (error) \
nfsm_reply(0); \
} while (0)
#define nfsm_mtouio(p,s) \
do {\
if ((s) > 0 && \
(t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \
error = t1; \
m_freem(mrep); \
goto nfsmout; \
} \
} while (0)
#define nfsm_uiotom(p,s) \
do { \
if ((t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) != 0) { \
error = t1; \
m_freem(mreq); \
goto nfsmout; \
} \
} while (0)
#define nfsm_reqhead(v,a,s) \
do { \
mb = mreq = nfsm_reqh((v),(a),(s),&bpos); \
} while (0)
#define nfsm_reqdone \
do { \
m_freem(mrep); \
nfsmout: \
} while (0)
#define nfsm_rndup(a) (((a)+3)&(~0x3))
#define nfsm_request(v, t, p, c) \
do { \
if ((error = nfs_request((v), mreq, (t), (p), \
(c), &mrep, &md, &dpos)) != 0) { \
if (error & NFSERR_RETERR) \
error &= ~NFSERR_RETERR; \
else \
goto nfsmout; \
} \
} while (0)
#define nfsm_strtom(a,s,m) \
do {\
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_int32_t *,t2); \
*tl++ = txdr_unsigned(s); \
*(tl+((t2>>2)-2)) = 0; \
bcopy((const char *)(a), (caddr_t)tl, (s)); \
} else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \
error = t2; \
m_freem(mreq); \
goto nfsmout; \
} \
} while (0)
#define nfsm_srvdone \
do { \
nfsmout: \
return (error); \
} while (0)
#define nfsm_reply(s) \
do { \
nfsd->nd_repstat = error; \
if (error && !(nfsd->nd_flag & ND_NFSV3)) \
(void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \
mrq, &mb, &bpos); \
else \
(void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \
mrq, &mb, &bpos); \
if (mrep != NULL) { \
m_freem(mrep); \
mrep = NULL; \
} \
mreq = *mrq; \
if (error && (!(nfsd->nd_flag & ND_NFSV3) || \
error == EBADRPC)) { \
error = 0; \
goto nfsmout; \
} \
} while (0)
#define nfsm_writereply(s, v3) \
do { \
nfsd->nd_repstat = error; \
if (error && !(v3)) \
(void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \
&mreq, &mb, &bpos); \
else \
(void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \
&mreq, &mb, &bpos); \
} while (0)
#define nfsm_adv(s) \
do { \
t1 = mtod(md, caddr_t)+md->m_len-dpos; \
if (t1 >= (s)) { \
dpos += (s); \
} else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \
error = t1; \
m_freem(mrep); \
goto nfsmout; \
} \
} while (0)
#define nfsm_srvmtofh(f) \
do { \
int fhlen; \
if (nfsd->nd_flag & ND_NFSV3) { \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
fhlen = fxdr_unsigned(int, *tl); \
if (fhlen != 0 && fhlen != NFSX_V3FH) { \
error = EBADRPC; \
nfsm_reply(0); \
} \
} else { \
fhlen = NFSX_V2FH; \
} \
if (fhlen != 0) { \
nfsm_dissect(tl, u_int32_t *, fhlen); \
bcopy((caddr_t)tl, (caddr_t)(f), fhlen); \
} else {\
bzero((caddr_t)(f), NFSX_V3FH); \
} \
} while (0)
#define nfsm_clget \
do { \
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_int32_t *)bp; \
} while (0)
#define nfsm_srvfillattr(a, f) \
do { \
nfsm_srvfattr(nfsd, (a), (f)); \
} while (0)
#define nfsm_srvwcc_data(br, b, ar, a) \
do { \
nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos); \
} while (0)
#define nfsm_srvpostop_attr(r, a) \
do { \
nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos); \
} while (0)
#define nfsm_srvsattr(a) \
do { \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
if (*tl == nfs_true) { \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
(a)->va_mode = nfstov_mode(*tl); \
} \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
if (*tl == nfs_true) { \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
(a)->va_uid = fxdr_unsigned(uid_t, *tl); \
} \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
if (*tl == nfs_true) { \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
(a)->va_gid = fxdr_unsigned(gid_t, *tl); \
} \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
if (*tl == nfs_true) { \
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
(a)->va_size = fxdr_hyper(tl); \
} \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
switch (fxdr_unsigned(int, *tl)) { \
case NFSV3SATTRTIME_TOCLIENT: \
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
fxdr_nfsv3time(tl, &(a)->va_atime); \
break; \
case NFSV3SATTRTIME_TOSERVER: \
getnanotime(&(a)->va_atime); \
break; \
}; \
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
switch (fxdr_unsigned(int, *tl)) { \
case NFSV3SATTRTIME_TOCLIENT: \
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
fxdr_nfsv3time(tl, &(a)->va_mtime); \
break; \
case NFSV3SATTRTIME_TOSERVER: \
getnanotime(&(a)->va_mtime); \
break; \
} \
} while (0)
#endif
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