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NetBSD/sys/nfs/nfs_subs.c

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/* $NetBSD: nfs_subs.c,v 1.39 1997/02/22 03:03:03 fvdl Exp $ */
/*
* 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.
*
* @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95
*/
/*
* These functions support the macros and help fiddle mbuf chains for
* the nfs op functions. They do things like create the rpc header and
* copy data between mbuf chains and uio lists.
*/
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/namei.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/malloc.h>
#include <sys/time.h>
#include <vm/vm.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfsnode.h>
#include <nfs/nfs.h>
#include <nfs/xdr_subs.h>
#include <nfs/nfsm_subs.h>
#include <nfs/nfsmount.h>
#include <nfs/nqnfs.h>
#include <nfs/nfsrtt.h>
#include <nfs/nfs_var.h>
#include <miscfs/specfs/specdev.h>
#include <vm/vm.h>
#include <netinet/in.h>
#ifdef ISO
#include <netiso/iso.h>
#endif
/*
* Data items converted to xdr at startup, since they are constant
* This is kinda hokey, but may save a little time doing byte swaps
*/
u_int32_t nfs_xdrneg1;
u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr,
rpc_mismatch, rpc_auth_unix, rpc_msgaccepted,
rpc_auth_kerb;
u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false;
/* And other global data */
static u_int32_t nfs_xid = 0;
nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON,
NFCHR, NFNON };
nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK,
NFFIFO, NFNON };
enum vtype nv2tov_type[8] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON };
enum vtype nv3tov_type[8]={ VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO };
int nfs_ticks;
/* NFS client/server stats. */
struct nfsstats nfsstats;
/*
* Mapping of old NFS Version 2 RPC numbers to generic numbers.
*/
int nfsv3_procid[NFS_NPROCS] = {
NFSPROC_NULL,
NFSPROC_GETATTR,
NFSPROC_SETATTR,
NFSPROC_NOOP,
NFSPROC_LOOKUP,
NFSPROC_READLINK,
NFSPROC_READ,
NFSPROC_NOOP,
NFSPROC_WRITE,
NFSPROC_CREATE,
NFSPROC_REMOVE,
NFSPROC_RENAME,
NFSPROC_LINK,
NFSPROC_SYMLINK,
NFSPROC_MKDIR,
NFSPROC_RMDIR,
NFSPROC_READDIR,
NFSPROC_FSSTAT,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP
};
/*
* and the reverse mapping from generic to Version 2 procedure numbers
*/
int nfsv2_procid[NFS_NPROCS] = {
NFSV2PROC_NULL,
NFSV2PROC_GETATTR,
NFSV2PROC_SETATTR,
NFSV2PROC_LOOKUP,
NFSV2PROC_NOOP,
NFSV2PROC_READLINK,
NFSV2PROC_READ,
NFSV2PROC_WRITE,
NFSV2PROC_CREATE,
NFSV2PROC_MKDIR,
NFSV2PROC_SYMLINK,
NFSV2PROC_CREATE,
NFSV2PROC_REMOVE,
NFSV2PROC_RMDIR,
NFSV2PROC_RENAME,
NFSV2PROC_LINK,
NFSV2PROC_READDIR,
NFSV2PROC_NOOP,
NFSV2PROC_STATFS,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
NFSV2PROC_NOOP,
};
/*
* Maps errno values to nfs error numbers.
* Use NFSERR_IO as the catch all for ones not specifically defined in
* RFC 1094.
*/
static u_char nfsrv_v2errmap[ELAST] = {
NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR,
NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO,
NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
NFSERR_IO,
};
/*
* Maps errno values to nfs error numbers.
* Although it is not obvious whether or not NFS clients really care if
* a returned error value is in the specified list for the procedure, the
* safest thing to do is filter them appropriately. For Version 2, the
* X/Open XNFS document is the only specification that defines error values
* for each RPC (The RFC simply lists all possible error values for all RPCs),
* so I have decided to not do this for Version 2.
* The first entry is the default error return and the rest are the valid
* errors for that RPC in increasing numeric order.
*/
static short nfsv3err_null[] = {
0,
0,
};
static short nfsv3err_getattr[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_setattr[] = {
NFSERR_IO,
NFSERR_PERM,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_INVAL,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOT_SYNC,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_lookup[] = {
NFSERR_IO,
NFSERR_NOENT,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_NOTDIR,
NFSERR_NAMETOL,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_access[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_readlink[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_INVAL,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_read[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_NXIO,
NFSERR_ACCES,
NFSERR_INVAL,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_write[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_INVAL,
NFSERR_FBIG,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_create[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_NOTDIR,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_mkdir[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_NOTDIR,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_symlink[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_NOTDIR,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_mknod[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_NOTDIR,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
NFSERR_BADTYPE,
0,
};
static short nfsv3err_remove[] = {
NFSERR_IO,
NFSERR_NOENT,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_NOTDIR,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_rmdir[] = {
NFSERR_IO,
NFSERR_NOENT,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_NOTDIR,
NFSERR_INVAL,
NFSERR_ROFS,
NFSERR_NAMETOL,
NFSERR_NOTEMPTY,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_rename[] = {
NFSERR_IO,
NFSERR_NOENT,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_XDEV,
NFSERR_NOTDIR,
NFSERR_ISDIR,
NFSERR_INVAL,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_MLINK,
NFSERR_NAMETOL,
NFSERR_NOTEMPTY,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_link[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_EXIST,
NFSERR_XDEV,
NFSERR_NOTDIR,
NFSERR_INVAL,
NFSERR_NOSPC,
NFSERR_ROFS,
NFSERR_MLINK,
NFSERR_NAMETOL,
NFSERR_DQUOT,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_NOTSUPP,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_readdir[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_NOTDIR,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_BAD_COOKIE,
NFSERR_TOOSMALL,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_readdirplus[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_ACCES,
NFSERR_NOTDIR,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_BAD_COOKIE,
NFSERR_NOTSUPP,
NFSERR_TOOSMALL,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_fsstat[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_fsinfo[] = {
NFSERR_STALE,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_pathconf[] = {
NFSERR_STALE,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short nfsv3err_commit[] = {
NFSERR_IO,
NFSERR_IO,
NFSERR_STALE,
NFSERR_BADHANDLE,
NFSERR_SERVERFAULT,
0,
};
static short *nfsrv_v3errmap[] = {
nfsv3err_null,
nfsv3err_getattr,
nfsv3err_setattr,
nfsv3err_lookup,
nfsv3err_access,
nfsv3err_readlink,
nfsv3err_read,
nfsv3err_write,
nfsv3err_create,
nfsv3err_mkdir,
nfsv3err_symlink,
nfsv3err_mknod,
nfsv3err_remove,
nfsv3err_rmdir,
nfsv3err_rename,
nfsv3err_link,
nfsv3err_readdir,
nfsv3err_readdirplus,
nfsv3err_fsstat,
nfsv3err_fsinfo,
nfsv3err_pathconf,
nfsv3err_commit,
};
extern struct nfsrtt nfsrtt;
extern time_t nqnfsstarttime;
extern int nqsrv_clockskew;
extern int nqsrv_writeslack;
extern int nqsrv_maxlease;
extern int nqnfs_piggy[NFS_NPROCS];
extern nfstype nfsv2_type[9];
extern nfstype nfsv3_type[9];
extern struct nfsnodehashhead *nfsnodehashtbl;
extern u_long nfsnodehash;
LIST_HEAD(nfsnodehashhead, nfsnode);
/*
* Create the header for an rpc request packet
* The hsiz is the size of the rest of the nfs request header.
* (just used to decide if a cluster is a good idea)
*/
struct mbuf *
nfsm_reqh(vp, procid, hsiz, bposp)
struct vnode *vp;
u_long procid;
int hsiz;
caddr_t *bposp;
{
register struct mbuf *mb;
register u_int32_t *tl;
register caddr_t bpos;
struct mbuf *mb2;
struct nfsmount *nmp;
int nqflag;
MGET(mb, M_WAIT, MT_DATA);
if (hsiz >= MINCLSIZE)
MCLGET(mb, M_WAIT);
mb->m_len = 0;
bpos = mtod(mb, caddr_t);
/*
* For NQNFS, add lease request.
*/
if (vp) {
nmp = VFSTONFS(vp->v_mount);
if (nmp->nm_flag & NFSMNT_NQNFS) {
nqflag = NQNFS_NEEDLEASE(vp, procid);
if (nqflag) {
nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED);
*tl++ = txdr_unsigned(nqflag);
*tl = txdr_unsigned(nmp->nm_leaseterm);
} else {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = 0;
}
}
}
/* Finally, return values */
*bposp = bpos;
return (mb);
}
/*
* Build the RPC header and fill in the authorization info.
* The authorization string argument is only used when the credentials
* come from outside of the kernel.
* Returns the head of the mbuf list.
*/
struct mbuf *
nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len,
verf_str, mrest, mrest_len, mbp, xidp)
register 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;
{
register struct mbuf *mb;
register u_int32_t *tl;
register caddr_t bpos;
register int i;
struct mbuf *mreq, *mb2;
int siz, grpsiz, authsiz;
struct timeval tv;
static u_int32_t base;
authsiz = nfsm_rndup(auth_len);
MGETHDR(mb, M_WAIT, MT_DATA);
if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) {
MCLGET(mb, M_WAIT);
} else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) {
MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED);
} else {
MH_ALIGN(mb, 8 * NFSX_UNSIGNED);
}
mb->m_len = 0;
mreq = mb;
bpos = mtod(mb, caddr_t);
/*
* First the RPC header.
*/
nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED);
/*
* derive initial xid from system time
* XXX time is invalid if root not yet mounted
*/
if (!base && (rootvp)) {
microtime(&tv);
base = tv.tv_sec << 12;
nfs_xid = base;
}
/*
* Skip zero xid if it should ever happen.
*/
if (++nfs_xid == 0)
nfs_xid++;
*tl++ = *xidp = txdr_unsigned(nfs_xid);
*tl++ = rpc_call;
*tl++ = rpc_vers;
if (nmflag & NFSMNT_NQNFS) {
*tl++ = txdr_unsigned(NQNFS_PROG);
*tl++ = txdr_unsigned(NQNFS_VER3);
} else {
*tl++ = txdr_unsigned(NFS_PROG);
if (nmflag & NFSMNT_NFSV3)
*tl++ = txdr_unsigned(NFS_VER3);
else
*tl++ = txdr_unsigned(NFS_VER2);
}
if (nmflag & NFSMNT_NFSV3)
*tl++ = txdr_unsigned(procid);
else
*tl++ = txdr_unsigned(nfsv2_procid[procid]);
/*
* And then the authorization cred.
*/
*tl++ = txdr_unsigned(auth_type);
*tl = txdr_unsigned(authsiz);
switch (auth_type) {
case RPCAUTH_UNIX:
nfsm_build(tl, u_int32_t *, auth_len);
*tl++ = 0; /* stamp ?? */
*tl++ = 0; /* NULL hostname */
*tl++ = txdr_unsigned(cr->cr_uid);
*tl++ = txdr_unsigned(cr->cr_gid);
grpsiz = (auth_len >> 2) - 5;
*tl++ = txdr_unsigned(grpsiz);
for (i = 0; i < grpsiz; i++)
*tl++ = txdr_unsigned(cr->cr_groups[i]);
break;
case RPCAUTH_KERB4:
siz = auth_len;
while (siz > 0) {
if (M_TRAILINGSPACE(mb) == 0) {
MGET(mb2, M_WAIT, MT_DATA);
if (siz >= MINCLSIZE)
MCLGET(mb2, M_WAIT);
mb->m_next = mb2;
mb = mb2;
mb->m_len = 0;
bpos = mtod(mb, caddr_t);
}
i = min(siz, M_TRAILINGSPACE(mb));
bcopy(auth_str, bpos, i);
mb->m_len += i;
auth_str += i;
bpos += i;
siz -= i;
}
if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) {
for (i = 0; i < siz; i++)
*bpos++ = '\0';
mb->m_len += siz;
}
break;
};
/*
* And the verifier...
*/
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
if (verf_str) {
*tl++ = txdr_unsigned(RPCAUTH_KERB4);
*tl = txdr_unsigned(verf_len);
siz = verf_len;
while (siz > 0) {
if (M_TRAILINGSPACE(mb) == 0) {
MGET(mb2, M_WAIT, MT_DATA);
if (siz >= MINCLSIZE)
MCLGET(mb2, M_WAIT);
mb->m_next = mb2;
mb = mb2;
mb->m_len = 0;
bpos = mtod(mb, caddr_t);
}
i = min(siz, M_TRAILINGSPACE(mb));
bcopy(verf_str, bpos, i);
mb->m_len += i;
verf_str += i;
bpos += i;
siz -= i;
}
if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) {
for (i = 0; i < siz; i++)
*bpos++ = '\0';
mb->m_len += siz;
}
} else {
*tl++ = txdr_unsigned(RPCAUTH_NULL);
*tl = 0;
}
mb->m_next = mrest;
mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len;
mreq->m_pkthdr.rcvif = (struct ifnet *)0;
*mbp = mb;
return (mreq);
}
/*
* copies mbuf chain to the uio scatter/gather list
*/
int
nfsm_mbuftouio(mrep, uiop, siz, dpos)
struct mbuf **mrep;
register struct uio *uiop;
int siz;
caddr_t *dpos;
{
register char *mbufcp, *uiocp;
register int xfer, left, len;
register struct mbuf *mp;
long uiosiz, rem;
int error = 0;
mp = *mrep;
mbufcp = *dpos;
len = mtod(mp, caddr_t)+mp->m_len-mbufcp;
rem = nfsm_rndup(siz)-siz;
while (siz > 0) {
if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
return (EFBIG);
left = uiop->uio_iov->iov_len;
uiocp = uiop->uio_iov->iov_base;
if (left > siz)
left = siz;
uiosiz = left;
while (left > 0) {
while (len == 0) {
mp = mp->m_next;
if (mp == NULL)
return (EBADRPC);
mbufcp = mtod(mp, caddr_t);
len = mp->m_len;
}
xfer = (left > len) ? len : left;
#ifdef notdef
/* Not Yet.. */
if (uiop->uio_iov->iov_op != NULL)
(*(uiop->uio_iov->iov_op))
(mbufcp, uiocp, xfer);
else
#endif
if (uiop->uio_segflg == UIO_SYSSPACE)
bcopy(mbufcp, uiocp, xfer);
else
copyout(mbufcp, uiocp, xfer);
left -= xfer;
len -= xfer;
mbufcp += xfer;
uiocp += xfer;
uiop->uio_offset += xfer;
uiop->uio_resid -= xfer;
}
if (uiop->uio_iov->iov_len <= siz) {
uiop->uio_iovcnt--;
uiop->uio_iov++;
} else {
uiop->uio_iov->iov_base += uiosiz;
uiop->uio_iov->iov_len -= uiosiz;
}
siz -= uiosiz;
}
*dpos = mbufcp;
*mrep = mp;
if (rem > 0) {
if (len < rem)
error = nfs_adv(mrep, dpos, rem, len);
else
*dpos += rem;
}
return (error);
}
/*
* copies a uio scatter/gather list to an mbuf chain.
* NOTE: can ony handle iovcnt == 1
*/
int
nfsm_uiotombuf(uiop, mq, siz, bpos)
register struct uio *uiop;
struct mbuf **mq;
int siz;
caddr_t *bpos;
{
register char *uiocp;
register struct mbuf *mp, *mp2;
register int xfer, left, mlen;
int uiosiz, clflg, rem;
char *cp;
#ifdef DIAGNOSTIC
if (uiop->uio_iovcnt != 1)
panic("nfsm_uiotombuf: iovcnt != 1");
#endif
if (siz > MLEN) /* or should it >= MCLBYTES ?? */
clflg = 1;
else
clflg = 0;
rem = nfsm_rndup(siz)-siz;
mp = mp2 = *mq;
while (siz > 0) {
left = uiop->uio_iov->iov_len;
uiocp = uiop->uio_iov->iov_base;
if (left > siz)
left = siz;
uiosiz = left;
while (left > 0) {
mlen = M_TRAILINGSPACE(mp);
if (mlen == 0) {
MGET(mp, M_WAIT, MT_DATA);
if (clflg)
MCLGET(mp, M_WAIT);
mp->m_len = 0;
mp2->m_next = mp;
mp2 = mp;
mlen = M_TRAILINGSPACE(mp);
}
xfer = (left > mlen) ? mlen : left;
#ifdef notdef
/* Not Yet.. */
if (uiop->uio_iov->iov_op != NULL)
(*(uiop->uio_iov->iov_op))
(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
else
#endif
if (uiop->uio_segflg == UIO_SYSSPACE)
bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
else
copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
mp->m_len += xfer;
left -= xfer;
uiocp += xfer;
uiop->uio_offset += xfer;
uiop->uio_resid -= xfer;
}
uiop->uio_iov->iov_base += uiosiz;
uiop->uio_iov->iov_len -= uiosiz;
siz -= uiosiz;
}
if (rem > 0) {
if (rem > M_TRAILINGSPACE(mp)) {
MGET(mp, M_WAIT, MT_DATA);
mp->m_len = 0;
mp2->m_next = mp;
}
cp = mtod(mp, caddr_t)+mp->m_len;
for (left = 0; left < rem; left++)
*cp++ = '\0';
mp->m_len += rem;
*bpos = cp;
} else
*bpos = mtod(mp, caddr_t)+mp->m_len;
*mq = mp;
return (0);
}
/*
* Get at least "siz" bytes of correctly aligned data.
* When called the mbuf pointers are not necessarily correct,
* dsosp points to what ought to be in m_data and left contains
* what ought to be in m_len.
* This is used by the macros nfsm_dissect and nfsm_dissecton for tough
* cases. (The macros use the vars. dpos and dpos2)
*/
int
nfsm_disct(mdp, dposp, siz, left, cp2)
struct mbuf **mdp;
caddr_t *dposp;
int siz;
int left;
caddr_t *cp2;
{
register struct mbuf *m1, *m2;
struct mbuf *havebuf = NULL;
caddr_t src = *dposp;
caddr_t dst;
int len;
#ifdef DEBUG
if (left < 0)
panic("nfsm_disct: left < 0");
#endif
m1 = *mdp;
/*
* Skip through the mbuf chain looking for an mbuf with
* some data. If the first mbuf found has enough data
* and it is correctly aligned return it.
*/
while (left == 0) {
havebuf = m1;
*mdp = m1 = m1->m_next;
if (m1 == NULL)
return (EBADRPC);
src = mtod(m1, caddr_t);
left = m1->m_len;
/*
* If we start a new mbuf and it is big enough
* and correctly aligned just return it, don't
* do any pull up.
*/
if (left >= siz && nfsm_aligned(src)) {
*cp2 = src;
*dposp = src + siz;
return (0);
}
}
if (m1->m_flags & M_EXT) {
if (havebuf) {
/* If the first mbuf with data has external data
* and there is a previous empty mbuf use it
* to move the data into.
*/
m2 = m1;
*mdp = m1 = havebuf;
if (m1->m_flags & M_EXT) {
MCLFREE(m1->m_ext.ext_buf)
m1->m_flags &= ~M_EXT;
m1->m_ext.ext_size = 0; /* why ??? */
}
} else {
/*
* If the first mbuf has a external data
* and there is no previous empty mbuf
* allocate a new mbuf and move the external
* data to the new mbuf. Also make the first
* mbuf look empty.
*/
m2 = m_get(M_WAIT, MT_DATA);
m2->m_ext = m1->m_ext;
m2->m_data = src;
m2->m_len = left;
m2->m_flags |= M_EXT;
m1->m_ext.ext_size = 0; /* why ??? */
m1->m_flags &= ~M_EXT;
m2->m_next = m1->m_next;
m1->m_next = m2;
}
m1->m_len = 0;
dst = m1->m_dat;
} else {
/*
* If the first mbuf has no external data
* move the data to the front of the mbuf.
*/
if ((dst = m1->m_dat) != src)
ovbcopy(src, dst, left);
dst += left;
m1->m_len = left;
m2 = m1->m_next;
}
m1->m_flags &= ~M_PKTHDR;
*cp2 = m1->m_data = m1->m_dat; /* data is at beginning of buffer */
*dposp = mtod(m1, caddr_t) + siz;
/*
* Loop through mbufs pulling data up into first mbuf until
* the first mbuf is full or there is no more data to
* pullup.
*/
while ((len = (MLEN - m1->m_len)) != 0 && m2) {
if ((len = min(len, m2->m_len)) != 0)
bcopy(m2->m_data, dst, len);
m1->m_len += len;
dst += len;
m2->m_data += len;
m2->m_len -= len;
m2 = m2->m_next;
}
if (m1->m_len < siz)
return (EBADRPC);
return (0);
}
/*
* Advance the position in the mbuf chain.
*/
int
nfs_adv(mdp, dposp, offs, left)
struct mbuf **mdp;
caddr_t *dposp;
int offs;
int left;
{
register struct mbuf *m;
register int s;
m = *mdp;
s = left;
while (s < offs) {
offs -= s;
m = m->m_next;
if (m == NULL)
return (EBADRPC);
s = m->m_len;
}
*mdp = m;
*dposp = mtod(m, caddr_t)+offs;
return (0);
}
/*
* Copy a string into mbufs for the hard cases...
*/
int
nfsm_strtmbuf(mb, bpos, cp, siz)
struct mbuf **mb;
char **bpos;
const char *cp;
long siz;
{
register struct mbuf *m1 = NULL, *m2;
long left, xfer, len, tlen;
u_int32_t *tl;
int putsize;
putsize = 1;
m2 = *mb;
left = M_TRAILINGSPACE(m2);
if (left > 0) {
tl = ((u_int32_t *)(*bpos));
*tl++ = txdr_unsigned(siz);
putsize = 0;
left -= NFSX_UNSIGNED;
m2->m_len += NFSX_UNSIGNED;
if (left > 0) {
bcopy(cp, (caddr_t) tl, left);
siz -= left;
cp += left;
m2->m_len += left;
left = 0;
}
}
/* Loop around adding mbufs */
while (siz > 0) {
MGET(m1, M_WAIT, MT_DATA);
if (siz > MLEN)
MCLGET(m1, M_WAIT);
m1->m_len = NFSMSIZ(m1);
m2->m_next = m1;
m2 = m1;
tl = mtod(m1, u_int32_t *);
tlen = 0;
if (putsize) {
*tl++ = txdr_unsigned(siz);
m1->m_len -= NFSX_UNSIGNED;
tlen = NFSX_UNSIGNED;
putsize = 0;
}
if (siz < m1->m_len) {
len = nfsm_rndup(siz);
xfer = siz;
if (xfer < len)
*(tl+(xfer>>2)) = 0;
} else {
xfer = len = m1->m_len;
}
bcopy(cp, (caddr_t) tl, xfer);
m1->m_len = len+tlen;
siz -= xfer;
cp += xfer;
}
*mb = m1;
*bpos = mtod(m1, caddr_t)+m1->m_len;
return (0);
}
/*
* Called once before VFS init to initialize shared and
* server-specific data structures.
*/
void
nfs_init()
{
#if !defined(alpha) && defined(DIAGNOSTIC)
/*
* Check to see if major data structures haven't bloated.
*/
if (sizeof (struct nfsnode) > NFS_NODEALLOC) {
printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC);
printf("Try reducing NFS_SMALLFH\n");
}
if (sizeof (struct nfsmount) > NFS_MNTALLOC) {
printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC);
printf("Try reducing NFS_MUIDHASHSIZ\n");
}
if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) {
printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC);
printf("Try reducing NFS_UIDHASHSIZ\n");
}
if (sizeof (struct nfsuid) > NFS_UIDALLOC) {
printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC);
printf("Try unionizing the nu_nickname and nu_flag fields\n");
}
#endif
nfsrtt.pos = 0;
rpc_vers = txdr_unsigned(RPC_VER2);
rpc_call = txdr_unsigned(RPC_CALL);
rpc_reply = txdr_unsigned(RPC_REPLY);
rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED);
rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED);
rpc_mismatch = txdr_unsigned(RPC_MISMATCH);
rpc_autherr = txdr_unsigned(RPC_AUTHERR);
rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4);
nfs_prog = txdr_unsigned(NFS_PROG);
nqnfs_prog = txdr_unsigned(NQNFS_PROG);
nfs_true = txdr_unsigned(TRUE);
nfs_false = txdr_unsigned(FALSE);
nfs_xdrneg1 = txdr_unsigned(-1);
nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000;
if (nfs_ticks < 1)
nfs_ticks = 1;
#ifdef NFSSERVER
nfsrv_init(0); /* Init server data structures */
nfsrv_initcache(); /* Init the server request cache */
#endif /* NFSSERVER */
/*
* Initialize the nqnfs data structures.
*/
if (nqnfsstarttime == 0) {
nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease
+ nqsrv_clockskew + nqsrv_writeslack;
NQLOADNOVRAM(nqnfsstarttime);
CIRCLEQ_INIT(&nqtimerhead);
nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash);
}
/*
* Initialize reply list and start timer
*/
TAILQ_INIT(&nfs_reqq);
nfs_timer(NULL);
}
#ifdef NFS
/*
* Called once at VFS init to initialize client-specific data structures.
*/
void
nfs_vfs_init()
{
register int i;
/* Ensure async daemons disabled */
for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
nfs_iodwant[i] = (struct proc *)0;
nfs_iodmount[i] = (struct nfsmount *)0;
}
nfs_nhinit(); /* Init the nfsnode table */
}
/*
* Attribute cache routines.
* nfs_loadattrcache() - loads or updates the cache contents from attributes
* that are on the mbuf list
* nfs_getattrcache() - returns valid attributes if found in cache, returns
* error otherwise
*/
/*
* Load the attribute cache (that lives in the nfsnode entry) with
* the values on the mbuf list and
* Iff vap not NULL
* copy the attributes to *vaper
*/
int
nfs_loadattrcache(vpp, mdp, dposp, vaper)
struct vnode **vpp;
struct mbuf **mdp;
caddr_t *dposp;
struct vattr *vaper;
{
register struct vnode *vp = *vpp;
register struct vattr *vap;
register struct nfs_fattr *fp;
extern int (**spec_nfsv2nodeop_p) __P((void *));
register struct nfsnode *np;
register int32_t t1;
caddr_t cp2;
int error = 0;
int32_t rdev;
struct mbuf *md;
enum vtype vtyp;
u_short vmode;
struct timespec mtime;
struct vnode *nvp;
int v3 = NFS_ISV3(vp);
md = *mdp;
t1 = (mtod(md, caddr_t) + md->m_len) - *dposp;
error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2);
if (error)
return (error);
fp = (struct nfs_fattr *)cp2;
if (v3) {
vtyp = nfsv3tov_type(fp->fa_type);
vmode = fxdr_unsigned(u_short, fp->fa_mode);
rdev = makedev(fxdr_unsigned(u_char, fp->fa3_rdev.specdata1),
fxdr_unsigned(u_char, fp->fa3_rdev.specdata2));
fxdr_nfsv3time(&fp->fa3_mtime, &mtime);
} else {
vtyp = nfsv2tov_type(fp->fa_type);
vmode = fxdr_unsigned(u_short, fp->fa_mode);
if (vtyp == VNON || vtyp == VREG)
vtyp = IFTOVT(vmode);
rdev = fxdr_unsigned(int32_t, fp->fa2_rdev);
fxdr_nfsv2time(&fp->fa2_mtime, &mtime);
/*
* Really ugly NFSv2 kludge.
*/
if (vtyp == VCHR && rdev == 0xffffffff)
vtyp = VFIFO;
}
/*
* If v_type == VNON it is a new node, so fill in the v_type,
* n_mtime fields. Check to see if it represents a special
* device, and if so, check for a possible alias. Once the
* correct vnode has been obtained, fill in the rest of the
* information.
*/
np = VTONFS(vp);
if (vp->v_type != vtyp) {
vp->v_type = vtyp;
if (vp->v_type == VFIFO) {
#ifndef FIFO
return (EOPNOTSUPP);
#else
extern int (**fifo_nfsv2nodeop_p) __P((void *));
vp->v_op = fifo_nfsv2nodeop_p;
#endif /* FIFO */
}
if (vp->v_type == VCHR || vp->v_type == VBLK) {
vp->v_op = spec_nfsv2nodeop_p;
nvp = checkalias(vp, (dev_t)rdev, vp->v_mount);
if (nvp) {
/*
* Discard unneeded vnode, but save its nfsnode.
* Since the nfsnode does not have a lock, its
* vnode lock has to be carried over.
*/
#ifdef Lite2_integrated
nvp->v_vnlock = vp->v_vnlock;
vp->v_vnlock = NULL;
#endif
nvp->v_data = vp->v_data;
vp->v_data = NULL;
vp->v_op = spec_vnodeop_p;
vrele(vp);
vgone(vp);
/*
* Reinitialize aliased node.
*/
np->n_vnode = nvp;
*vpp = vp = nvp;
}
}
np->n_mtime = mtime.tv_sec;
}
vap = &np->n_vattr;
vap->va_type = vtyp;
vap->va_mode = (vmode & 07777);
vap->va_rdev = (dev_t)rdev;
vap->va_mtime = mtime;
vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
if (v3) {
vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
fxdr_hyper(&fp->fa3_size, &vap->va_size);
vap->va_blocksize = NFS_FABLKSIZE;
fxdr_hyper(&fp->fa3_used, &vap->va_bytes);
vap->va_fileid = fxdr_unsigned(int32_t,
fp->fa3_fileid.nfsuquad[1]);
fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime);
fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime);
vap->va_flags = 0;
vap->va_filerev = 0;
} else {
vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks)
* NFS_FABLKSIZE;
vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid);
fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime);
vap->va_flags = 0;
vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t,
fp->fa2_ctime.nfsv2_sec);
vap->va_ctime.tv_nsec = 0;
vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
vap->va_filerev = 0;
}
if (vap->va_size != np->n_size) {
if (vap->va_type == VREG) {
if (np->n_flag & NMODIFIED) {
if (vap->va_size < np->n_size)
vap->va_size = np->n_size;
else
np->n_size = vap->va_size;
} else
np->n_size = vap->va_size;
vnode_pager_setsize(vp, (u_long)np->n_size);
} else
np->n_size = vap->va_size;
}
np->n_attrstamp = time.tv_sec;
if (vaper != NULL) {
bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
if (np->n_flag & NCHG) {
if (np->n_flag & NACC)
vaper->va_atime = np->n_atim;
if (np->n_flag & NUPD)
vaper->va_mtime = np->n_mtim;
}
}
return (0);
}
/*
* Check the time stamp
* If the cache is valid, copy contents to *vap and return 0
* otherwise return an error
*/
int
nfs_getattrcache(vp, vaper)
register struct vnode *vp;
struct vattr *vaper;
{
register struct nfsnode *np = VTONFS(vp);
register struct vattr *vap;
if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) {
nfsstats.attrcache_misses++;
return (ENOENT);
}
nfsstats.attrcache_hits++;
vap = &np->n_vattr;
if (vap->va_size != np->n_size) {
if (vap->va_type == VREG) {
if (np->n_flag & NMODIFIED) {
if (vap->va_size < np->n_size)
vap->va_size = np->n_size;
else
np->n_size = vap->va_size;
} else
np->n_size = vap->va_size;
vnode_pager_setsize(vp, (u_long)np->n_size);
} else
np->n_size = vap->va_size;
}
bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr));
if (np->n_flag & NCHG) {
if (np->n_flag & NACC)
vaper->va_atime = np->n_atim;
if (np->n_flag & NUPD)
vaper->va_mtime = np->n_mtim;
}
return (0);
}
#endif /* NFS */
/*
* Set up nameidata for a lookup() call and do it
*/
int
nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag)
register struct nameidata *ndp;
fhandle_t *fhp;
int len;
struct nfssvc_sock *slp;
struct mbuf *nam;
struct mbuf **mdp;
caddr_t *dposp;
struct vnode **retdirp;
struct proc *p;
int kerbflag;
{
register int i, rem;
register struct mbuf *md;
register char *fromcp, *tocp;
struct vnode *dp;
int error, rdonly;
struct componentname *cnp = &ndp->ni_cnd;
*retdirp = (struct vnode *)0;
MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK);
/*
* Copy the name from the mbuf list to ndp->ni_pnbuf
* and set the various ndp fields appropriately.
*/
fromcp = *dposp;
tocp = cnp->cn_pnbuf;
md = *mdp;
rem = mtod(md, caddr_t) + md->m_len - fromcp;
for (i = 0; i < len; i++) {
while (rem == 0) {
md = md->m_next;
if (md == NULL) {
error = EBADRPC;
goto out;
}
fromcp = mtod(md, caddr_t);
rem = md->m_len;
}
if (*fromcp == '\0' || *fromcp == '/') {
error = EACCES;
goto out;
}
*tocp++ = *fromcp++;
rem--;
}
*tocp = '\0';
*mdp = md;
*dposp = fromcp;
len = nfsm_rndup(len)-len;
if (len > 0) {
if (rem >= len)
*dposp += len;
else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0)
goto out;
}
ndp->ni_pathlen = tocp - cnp->cn_pnbuf;
cnp->cn_nameptr = cnp->cn_pnbuf;
/*
* Extract and set starting directory.
*/
error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp,
nam, &rdonly, kerbflag);
if (error)
goto out;
if (dp->v_type != VDIR) {
vrele(dp);
error = ENOTDIR;
goto out;
}
VREF(dp);
*retdirp = dp;
ndp->ni_startdir = dp;
if (rdonly)
cnp->cn_flags |= (NOCROSSMOUNT | RDONLY);
else
cnp->cn_flags |= NOCROSSMOUNT;
/*
* And call lookup() to do the real work
*/
cnp->cn_proc = p;
error = lookup(ndp);
if (error)
goto out;
/*
* Check for encountering a symbolic link
*/
if (cnp->cn_flags & ISSYMLINK) {
if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1)
vput(ndp->ni_dvp);
else
vrele(ndp->ni_dvp);
vput(ndp->ni_vp);
ndp->ni_vp = NULL;
error = EINVAL;
goto out;
}
/*
* Check for saved name request
*/
if (cnp->cn_flags & (SAVENAME | SAVESTART)) {
cnp->cn_flags |= HASBUF;
return (0);
}
out:
FREE(cnp->cn_pnbuf, M_NAMEI);
return (error);
}
/*
* A fiddled version of m_adj() that ensures null fill to a long
* boundary and only trims off the back end
*/
void
nfsm_adj(mp, len, nul)
struct mbuf *mp;
register int len;
int nul;
{
register struct mbuf *m;
register int count, i;
register char *cp;
/*
* Trim from tail. Scan the mbuf chain,
* calculating its length and finding the last mbuf.
* If the adjustment only affects this mbuf, then just
* adjust and return. Otherwise, rescan and truncate
* after the remaining size.
*/
count = 0;
m = mp;
for (;;) {
count += m->m_len;
if (m->m_next == (struct mbuf *)0)
break;
m = m->m_next;
}
if (m->m_len > len) {
m->m_len -= len;
if (nul > 0) {
cp = mtod(m, caddr_t)+m->m_len-nul;
for (i = 0; i < nul; i++)
*cp++ = '\0';
}
return;
}
count -= len;
if (count < 0)
count = 0;
/*
* Correct length for chain is "count".
* Find the mbuf with last data, adjust its length,
* and toss data from remaining mbufs on chain.
*/
for (m = mp; m; m = m->m_next) {
if (m->m_len >= count) {
m->m_len = count;
if (nul > 0) {
cp = mtod(m, caddr_t)+m->m_len-nul;
for (i = 0; i < nul; i++)
*cp++ = '\0';
}
break;
}
count -= m->m_len;
}
for (m = m->m_next;m;m = m->m_next)
m->m_len = 0;
}
/*
* Make these functions instead of macros, so that the kernel text size
* doesn't get too big...
*/
void
nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp)
struct nfsrv_descript *nfsd;
int before_ret;
register struct vattr *before_vap;
int after_ret;
struct vattr *after_vap;
struct mbuf **mbp;
char **bposp;
{
register struct mbuf *mb = *mbp, *mb2;
register char *bpos = *bposp;
register u_int32_t *tl;
if (before_ret) {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = nfs_false;
} else {
nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
*tl++ = nfs_true;
txdr_hyper(&(before_vap->va_size), tl);
tl += 2;
txdr_nfsv3time(&(before_vap->va_mtime), tl);
tl += 2;
txdr_nfsv3time(&(before_vap->va_ctime), tl);
}
*bposp = bpos;
*mbp = mb;
nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp);
}
void
nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp)
struct nfsrv_descript *nfsd;
int after_ret;
struct vattr *after_vap;
struct mbuf **mbp;
char **bposp;
{
register struct mbuf *mb = *mbp, *mb2;
register char *bpos = *bposp;
register u_int32_t *tl;
register struct nfs_fattr *fp;
if (after_ret) {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = nfs_false;
} else {
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR);
*tl++ = nfs_true;
fp = (struct nfs_fattr *)tl;
nfsm_srvfattr(nfsd, after_vap, fp);
}
*mbp = mb;
*bposp = bpos;
}
void
nfsm_srvfattr(nfsd, vap, fp)
register struct nfsrv_descript *nfsd;
register struct vattr *vap;
register struct nfs_fattr *fp;
{
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_flag & ND_NFSV3) {
fp->fa_type = vtonfsv3_type(vap->va_type);
fp->fa_mode = vtonfsv3_mode(vap->va_mode);
txdr_hyper(&vap->va_size, &fp->fa3_size);
txdr_hyper(&vap->va_bytes, &fp->fa3_used);
fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev));
fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev));
fp->fa3_fsid.nfsuquad[0] = 0;
fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid);
fp->fa3_fileid.nfsuquad[0] = 0;
fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid);
txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime);
txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime);
txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime);
} else {
fp->fa_type = vtonfsv2_type(vap->va_type);
fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
fp->fa2_size = txdr_unsigned(vap->va_size);
fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize);
if (vap->va_type == VFIFO)
fp->fa2_rdev = 0xffffffff;
else
fp->fa2_rdev = txdr_unsigned(vap->va_rdev);
fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE);
fp->fa2_fsid = txdr_unsigned(vap->va_fsid);
fp->fa2_fileid = txdr_unsigned(vap->va_fileid);
txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime);
txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime);
txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime);
}
}
/*
* nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked)
* - look up fsid in mount list (if not found ret error)
* - get vp and export rights by calling VFS_FHTOVP()
* - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
* - if not lockflag unlock it with VOP_UNLOCK()
*/
int
nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag)
fhandle_t *fhp;
int lockflag;
struct vnode **vpp;
struct ucred *cred;
struct nfssvc_sock *slp;
struct mbuf *nam;
int *rdonlyp;
int kerbflag;
{
#ifdef Lite2_integrated
struct proc *p = curproc; /* XXX */
#endif
register struct mount *mp;
register int i;
struct ucred *credanon;
int error, exflags;
*vpp = (struct vnode *)0;
#ifdef Lite2_integrated
mp = vfs_getvfs(&fhp->fh_fsid);
#else
mp = getvfs(&fhp->fh_fsid);
#endif
if (!mp)
return (ESTALE);
error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon);
if (error)
return (error);
/*
* Check/setup credentials.
*/
if (exflags & MNT_EXKERB) {
if (!kerbflag) {
vput(*vpp);
return (NFSERR_AUTHERR | AUTH_TOOWEAK);
}
} else if (kerbflag) {
vput(*vpp);
return (NFSERR_AUTHERR | AUTH_TOOWEAK);
} else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) {
cred->cr_uid = credanon->cr_uid;
cred->cr_gid = credanon->cr_gid;
for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++)
cred->cr_groups[i] = credanon->cr_groups[i];
cred->cr_ngroups = i;
}
if (exflags & MNT_EXRDONLY)
*rdonlyp = 1;
else
*rdonlyp = 0;
if (!lockflag)
#ifdef Lite2_integrated
VOP_UNLOCK(*vpp, 0, p);
#else
VOP_UNLOCK(*vpp);
#endif
return (0);
}
/*
* This function compares two net addresses by family and returns TRUE
* if they are the same host.
* If there is any doubt, return FALSE.
* The AF_INET family is handled as a special case so that address mbufs
* don't need to be saved to store "struct in_addr", which is only 4 bytes.
*/
int
netaddr_match(family, haddr, nam)
int family;
union nethostaddr *haddr;
struct mbuf *nam;
{
register struct sockaddr_in *inetaddr;
switch (family) {
case AF_INET:
inetaddr = mtod(nam, struct sockaddr_in *);
if (inetaddr->sin_family == AF_INET &&
inetaddr->sin_addr.s_addr == haddr->had_inetaddr)
return (1);
break;
#ifdef ISO
case AF_ISO:
{
register struct sockaddr_iso *isoaddr1, *isoaddr2;
isoaddr1 = mtod(nam, struct sockaddr_iso *);
isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *);
if (isoaddr1->siso_family == AF_ISO &&
isoaddr1->siso_nlen > 0 &&
isoaddr1->siso_nlen == isoaddr2->siso_nlen &&
SAME_ISOADDR(isoaddr1, isoaddr2))
return (1);
break;
}
#endif /* ISO */
default:
break;
};
return (0);
}
static nfsuint64 nfs_nullcookie = {{ 0, 0 }};
/*
* This function finds the directory cookie that corresponds to the
* logical byte offset given.
*/
nfsuint64 *
nfs_getcookie(np, off, add)
register struct nfsnode *np;
off_t off;
int add;
{
register struct nfsdmap *dp, *dp2;
register int pos;
pos = off / NFS_DIRBLKSIZ;
if (pos == 0) {
#ifdef DIAGNOSTIC
if (add)
panic("nfs getcookie add at 0");
#endif
return (&nfs_nullcookie);
}
pos--;
dp = np->n_cookies.lh_first;
if (!dp) {
if (add) {
MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
M_NFSDIROFF, M_WAITOK);
dp->ndm_eocookie = 0;
LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
} else
return ((nfsuint64 *)0);
}
while (pos >= NFSNUMCOOKIES) {
pos -= NFSNUMCOOKIES;
if (dp->ndm_list.le_next) {
if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
pos >= dp->ndm_eocookie)
return ((nfsuint64 *)0);
dp = dp->ndm_list.le_next;
} else if (add) {
MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
M_NFSDIROFF, M_WAITOK);
dp2->ndm_eocookie = 0;
LIST_INSERT_AFTER(dp, dp2, ndm_list);
dp = dp2;
} else
return ((nfsuint64 *)0);
}
if (pos >= dp->ndm_eocookie) {
if (add)
dp->ndm_eocookie = pos + 1;
else
return ((nfsuint64 *)0);
}
return (&dp->ndm_cookies[pos]);
}
/*
* Invalidate cached directory information, except for the actual directory
* blocks (which are invalidated separately).
* Done mainly to avoid the use of stale offset cookies.
*/
void
nfs_invaldir(vp)
register struct vnode *vp;
{
#ifdef notdef /* XXX */
register struct nfsnode *np = VTONFS(vp);
#ifdef DIAGNOSTIC
if (vp->v_type != VDIR)
panic("nfs: invaldir not dir");
#endif
np->n_direofoffset = 0;
np->n_cookieverf.nfsuquad[0] = 0;
np->n_cookieverf.nfsuquad[1] = 0;
if (np->n_cookies.lh_first)
np->n_cookies.lh_first->ndm_eocookie = 0;
#endif
}
/*
* The write verifier has changed (probably due to a server reboot), so all
* B_NEEDCOMMIT blocks will have to be written again. Since they are on the
* dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT
* flag. Once done the new write verifier can be set for the mount point.
*/
void
nfs_clearcommit(mp)
struct mount *mp;
{
register struct vnode *vp, *nvp;
register struct buf *bp, *nbp;
int s;
s = splbio();
loop:
for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) {
if (vp->v_mount != mp) /* Paranoia */
goto loop;
nvp = vp->v_mntvnodes.le_next;
for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
nbp = bp->b_vnbufs.le_next;
if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT))
== (B_DELWRI | B_NEEDCOMMIT))
bp->b_flags &= ~B_NEEDCOMMIT;
}
}
splx(s);
}
/*
* Map errnos to NFS error numbers. For Version 3 also filter out error
* numbers not specified for the associated procedure.
*/
int
nfsrv_errmap(nd, err)
struct nfsrv_descript *nd;
register int err;
{
register short *defaulterrp, *errp;
if (nd->nd_flag & ND_NFSV3) {
if (nd->nd_procnum <= NFSPROC_COMMIT) {
errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum];
while (*++errp) {
if (*errp == err)
return (err);
else if (*errp > err)
break;
}
return ((int)*defaulterrp);
} else
return (err & 0xffff);
}
if (err <= ELAST)
return ((int)nfsrv_v2errmap[err - 1]);
return (NFSERR_IO);
}
/*
* Sort the group list in increasing numerical order.
* (Insertion sort by Chris Torek, who was grossed out by the bubble sort
* that used to be here.)
*/
void
nfsrvw_sort(list, num)
register gid_t *list;
register int num;
{
register int i, j;
gid_t v;
/* Insertion sort. */
for (i = 1; i < num; i++) {
v = list[i];
/* find correct slot for value v, moving others up */
for (j = i; --j >= 0 && v < list[j];)
list[j + 1] = list[j];
list[j + 1] = v;
}
}
/*
* copy credentials making sure that the result can be compared with bcmp().
*/
void
nfsrv_setcred(incred, outcred)
register struct ucred *incred, *outcred;
{
register int i;
bzero((caddr_t)outcred, sizeof (struct ucred));
outcred->cr_ref = 1;
outcred->cr_uid = incred->cr_uid;
outcred->cr_gid = incred->cr_gid;
outcred->cr_ngroups = incred->cr_ngroups;
for (i = 0; i < incred->cr_ngroups; i++)
outcred->cr_groups[i] = incred->cr_groups[i];
nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups);
}
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