66b462a989
but since the nfs cleanup, it hasn't done so in the case where `error' is EBADRPC. Callers of this macro expect it to initialise *mrq, and the `nfsmout' exit point expects a reply to be allocated if error == 0. When nfsm_reply() was called with error = EBADRPC, whatever junk was in *mrq (often a stale pointer to an old reply mbuf) would be assumed to be a valid reply and passed to pru_sosend(), causing a crash sooner or later. Fix this by allocating a reply even in the EBADRPC case like we used to do. This bug was specific to -current.
178 lines
5.3 KiB
C
178 lines
5.3 KiB
C
/*
|
|
* 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 _NFSSERVER_NFSM_SUBS_H_
|
|
#define _NFSSERVER_NFSM_SUBS_H_
|
|
|
|
#include <nfs/nfs_common.h>
|
|
|
|
#define nfstov_mode(a) (fxdr_unsigned(u_int32_t, (a)) & ALLPERMS)
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
|
|
#define M_HASCL(m) ((m)->m_flags & M_EXT)
|
|
#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.
|
|
*/
|
|
|
|
|
|
|
|
/* ************************************* */
|
|
/* Dissection phase macros */
|
|
|
|
int nfsm_srvstrsiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
|
|
int nfsm_srvnamesiz_xx(int *s, struct mbuf **md, caddr_t *dpos);
|
|
int nfsm_srvmtofh_xx(fhandle_t *f, struct nfsrv_descript *nfsd,
|
|
struct mbuf **md, caddr_t *dpos);
|
|
int nfsm_srvsattr_xx(struct vattr *a, struct mbuf **md, caddr_t *dpos);
|
|
|
|
#define nfsm_srvstrsiz(s, m) \
|
|
do { \
|
|
int t1; \
|
|
t1 = nfsm_srvstrsiz_xx(&(s), (m), &md, &dpos); \
|
|
if (t1) { \
|
|
error = t1; \
|
|
nfsm_reply(0); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define nfsm_srvnamesiz(s) \
|
|
do { \
|
|
int t1; \
|
|
t1 = nfsm_srvnamesiz_xx(&(s), &md, &dpos); \
|
|
if (t1) { \
|
|
error = t1; \
|
|
nfsm_reply(0); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define nfsm_srvmtofh(f) \
|
|
do { \
|
|
int t1; \
|
|
t1 = nfsm_srvmtofh_xx((f), nfsd, &md, &dpos); \
|
|
if (t1) { \
|
|
error = t1; \
|
|
nfsm_reply(0); \
|
|
} \
|
|
} while (0)
|
|
|
|
/* XXX why is this different? */
|
|
#define nfsm_srvsattr(a) \
|
|
do { \
|
|
int t1; \
|
|
t1 = nfsm_srvsattr_xx((a), &md, &dpos); \
|
|
if (t1) { \
|
|
error = t1; \
|
|
m_freem(mrep); \
|
|
mrep = NULL; \
|
|
goto nfsmout; \
|
|
} \
|
|
} while (0)
|
|
|
|
/* ************************************* */
|
|
/* Prepare the reply */
|
|
|
|
#define nfsm_reply(s) \
|
|
do { \
|
|
if (mrep != NULL) { \
|
|
m_freem(mrep); \
|
|
mrep = NULL; \
|
|
} \
|
|
mreq = nfs_rephead((s), nfsd, error, &mb, &bpos); \
|
|
*mrq = mreq; \
|
|
if (error == EBADRPC) { \
|
|
error = 0; \
|
|
goto nfsmout; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define nfsm_writereply(s) \
|
|
do { \
|
|
mreq = nfs_rephead((s), nfsd, error, &mb, &bpos); \
|
|
} while(0)
|
|
|
|
/* ************************************* */
|
|
/* Reply phase macros - add additional reply info */
|
|
|
|
void nfsm_srvfhtom_xx(fhandle_t *f, int v3, struct mbuf **mb,
|
|
caddr_t *bpos);
|
|
void nfsm_srvpostop_fh_xx(fhandle_t *f, struct mbuf **mb, caddr_t *bpos);
|
|
void nfsm_clget_xx(u_int32_t **tl, struct mbuf *mb, struct mbuf **mp,
|
|
char **bp, char **be, caddr_t bpos);
|
|
|
|
#define nfsm_srvfhtom(f, v3) \
|
|
nfsm_srvfhtom_xx((f), (v3), &mb, &bpos)
|
|
|
|
#define nfsm_srvpostop_fh(f) \
|
|
nfsm_srvpostop_fh_xx((f), &mb, &bpos)
|
|
|
|
#define nfsm_srvwcc_data(br, b, ar, a) \
|
|
nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos)
|
|
|
|
#define nfsm_srvpostop_attr(r, a) \
|
|
nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos)
|
|
|
|
#define nfsm_srvfillattr(a, f) \
|
|
nfsm_srvfattr(nfsd, (a), (f))
|
|
|
|
#define nfsm_clget \
|
|
nfsm_clget_xx(&tl, mb, &mp, &bp, &be, bpos)
|
|
|
|
#endif
|