1179 lines
28 KiB
C
1179 lines
28 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)nfs_subs.c 8.3 (Berkeley) 1/4/94
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* $Id: nfs_subs.c,v 1.5 1994/09/22 22:10:44 wollman Exp $
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*/
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/*
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* These functions support the macros and help fiddle mbuf chains for
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* the nfs op functions. They do things like create the rpc header and
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* copy data between mbuf chains and uio lists.
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*/
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/namei.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#ifdef VFS_LKM
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#include <sys/sysent.h>
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#include <sys/syscall.h>
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#endif
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#include <vm/vm.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsv2.h>
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#include <nfs/nfsnode.h>
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#include <nfs/nfs.h>
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#include <nfs/xdr_subs.h>
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#include <nfs/nfsm_subs.h>
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#include <nfs/nfsmount.h>
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#include <nfs/nqnfs.h>
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#include <nfs/nfsrtt.h>
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#include <miscfs/specfs/specdev.h>
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#include <netinet/in.h>
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#ifdef ISO
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#include <netiso/iso.h>
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#endif
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#define TRUE 1
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#define FALSE 0
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/*
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* Data items converted to xdr at startup, since they are constant
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* This is kinda hokey, but may save a little time doing byte swaps
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*/
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u_long nfs_procids[NFS_NPROCS];
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u_long nfs_xdrneg1;
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u_long rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr,
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rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, rpc_rejectedcred,
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rpc_auth_kerb;
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u_long nfs_vers, nfs_prog, nfs_true, nfs_false;
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/* And other global data */
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static u_long nfs_xid = 0;
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enum vtype ntov_type[7] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON };
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extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
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extern struct nfsreq nfsreqh;
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extern int nqnfs_piggy[NFS_NPROCS];
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extern struct nfsrtt nfsrtt;
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extern time_t nqnfsstarttime;
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extern u_long nqnfs_prog, nqnfs_vers;
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extern int nqsrv_clockskew;
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extern int nqsrv_writeslack;
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extern int nqsrv_maxlease;
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#ifdef VFS_LKM
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struct getfh_args;
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extern int getfh(struct proc *, struct getfh_args *, int *);
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struct nfssvc_args;
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extern int nfssvc(struct proc *, struct nfssvc_args *, int *);
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#endif
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/*
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* Create the header for an rpc request packet
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* The hsiz is the size of the rest of the nfs request header.
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* (just used to decide if a cluster is a good idea)
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*/
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struct mbuf *
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nfsm_reqh(vp, procid, hsiz, bposp)
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struct vnode *vp;
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u_long procid;
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int hsiz;
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caddr_t *bposp;
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{
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register struct mbuf *mb;
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register u_long *tl;
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register caddr_t bpos;
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struct mbuf *mb2;
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struct nfsmount *nmp;
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int nqflag;
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MGET(mb, M_WAIT, MT_DATA);
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if (hsiz >= MINCLSIZE)
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MCLGET(mb, M_WAIT);
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mb->m_len = 0;
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bpos = mtod(mb, caddr_t);
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/*
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* For NQNFS, add lease request.
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*/
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if (vp) {
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nmp = VFSTONFS(vp->v_mount);
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if (nmp->nm_flag & NFSMNT_NQNFS) {
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nqflag = NQNFS_NEEDLEASE(vp, procid);
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if (nqflag) {
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nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED);
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*tl++ = txdr_unsigned(nqflag);
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*tl = txdr_unsigned(nmp->nm_leaseterm);
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} else {
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nfsm_build(tl, u_long *, NFSX_UNSIGNED);
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*tl = 0;
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}
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}
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}
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/* Finally, return values */
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*bposp = bpos;
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return (mb);
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}
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/*
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* Build the RPC header and fill in the authorization info.
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* The authorization string argument is only used when the credentials
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* come from outside of the kernel.
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* Returns the head of the mbuf list.
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*/
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struct mbuf *
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nfsm_rpchead(cr, nqnfs, procid, auth_type, auth_len, auth_str, mrest,
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mrest_len, mbp, xidp)
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register struct ucred *cr;
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int nqnfs;
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int procid;
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int auth_type;
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int auth_len;
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char *auth_str;
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struct mbuf *mrest;
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int mrest_len;
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struct mbuf **mbp;
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u_long *xidp;
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{
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register struct mbuf *mb;
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register u_long *tl;
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register caddr_t bpos;
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register int i;
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struct mbuf *mreq, *mb2;
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int siz, grpsiz, authsiz;
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authsiz = nfsm_rndup(auth_len);
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if (auth_type == RPCAUTH_NQNFS)
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authsiz += 2 * NFSX_UNSIGNED;
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MGETHDR(mb, M_WAIT, MT_DATA);
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if ((authsiz + 10*NFSX_UNSIGNED) >= MINCLSIZE) {
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MCLGET(mb, M_WAIT);
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} else if ((authsiz + 10*NFSX_UNSIGNED) < MHLEN) {
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MH_ALIGN(mb, authsiz + 10*NFSX_UNSIGNED);
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} else {
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MH_ALIGN(mb, 8*NFSX_UNSIGNED);
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}
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mb->m_len = 0;
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mreq = mb;
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bpos = mtod(mb, caddr_t);
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/*
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* First the RPC header.
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*/
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nfsm_build(tl, u_long *, 8*NFSX_UNSIGNED);
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if (++nfs_xid == 0)
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nfs_xid++;
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*tl++ = *xidp = txdr_unsigned(nfs_xid);
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*tl++ = rpc_call;
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*tl++ = rpc_vers;
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if (nqnfs) {
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*tl++ = txdr_unsigned(NQNFS_PROG);
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*tl++ = txdr_unsigned(NQNFS_VER1);
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} else {
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*tl++ = txdr_unsigned(NFS_PROG);
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*tl++ = txdr_unsigned(NFS_VER2);
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}
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*tl++ = txdr_unsigned(procid);
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/*
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* And then the authorization cred.
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*/
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*tl++ = txdr_unsigned(auth_type);
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*tl = txdr_unsigned(authsiz);
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switch (auth_type) {
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case RPCAUTH_UNIX:
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nfsm_build(tl, u_long *, auth_len);
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*tl++ = 0; /* stamp ?? */
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*tl++ = 0; /* NULL hostname */
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*tl++ = txdr_unsigned(cr->cr_uid);
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*tl++ = txdr_unsigned(cr->cr_groups[0]);
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grpsiz = (auth_len >> 2) - 5;
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*tl++ = txdr_unsigned(grpsiz);
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for (i = 1; i <= grpsiz; i++)
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*tl++ = txdr_unsigned(cr->cr_groups[i]);
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break;
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case RPCAUTH_NQNFS:
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nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED);
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*tl++ = txdr_unsigned(cr->cr_uid);
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*tl = txdr_unsigned(auth_len);
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siz = auth_len;
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while (siz > 0) {
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if (M_TRAILINGSPACE(mb) == 0) {
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MGET(mb2, M_WAIT, MT_DATA);
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if (siz >= MINCLSIZE)
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MCLGET(mb2, M_WAIT);
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mb->m_next = mb2;
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mb = mb2;
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mb->m_len = 0;
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bpos = mtod(mb, caddr_t);
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}
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i = min(siz, M_TRAILINGSPACE(mb));
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bcopy(auth_str, bpos, i);
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mb->m_len += i;
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auth_str += i;
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bpos += i;
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siz -= i;
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}
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if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) {
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for (i = 0; i < siz; i++)
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*bpos++ = '\0';
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mb->m_len += siz;
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}
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break;
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};
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nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED);
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*tl++ = txdr_unsigned(RPCAUTH_NULL);
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*tl = 0;
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mb->m_next = mrest;
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mreq->m_pkthdr.len = authsiz + 10*NFSX_UNSIGNED + mrest_len;
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mreq->m_pkthdr.rcvif = (struct ifnet *)0;
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*mbp = mb;
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return (mreq);
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}
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/*
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* copies mbuf chain to the uio scatter/gather list
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*/
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int
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nfsm_mbuftouio(mrep, uiop, siz, dpos)
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struct mbuf **mrep;
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register struct uio *uiop;
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int siz;
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caddr_t *dpos;
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{
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register char *mbufcp, *uiocp;
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register int xfer, left, len;
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register struct mbuf *mp;
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long uiosiz, rem;
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int error = 0;
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mp = *mrep;
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mbufcp = *dpos;
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len = mtod(mp, caddr_t)+mp->m_len-mbufcp;
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rem = nfsm_rndup(siz)-siz;
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while (siz > 0) {
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if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
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return (EFBIG);
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left = uiop->uio_iov->iov_len;
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uiocp = uiop->uio_iov->iov_base;
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if (left > siz)
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left = siz;
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uiosiz = left;
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while (left > 0) {
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while (len == 0) {
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mp = mp->m_next;
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if (mp == NULL)
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return (EBADRPC);
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mbufcp = mtod(mp, caddr_t);
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len = mp->m_len;
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}
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xfer = (left > len) ? len : left;
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#ifdef notdef
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/* Not Yet.. */
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if (uiop->uio_iov->iov_op != NULL)
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(*(uiop->uio_iov->iov_op))
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(mbufcp, uiocp, xfer);
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else
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#endif
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if (uiop->uio_segflg == UIO_SYSSPACE)
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bcopy(mbufcp, uiocp, xfer);
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else
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copyout(mbufcp, uiocp, xfer);
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left -= xfer;
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len -= xfer;
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mbufcp += xfer;
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uiocp += xfer;
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uiop->uio_offset += xfer;
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uiop->uio_resid -= xfer;
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}
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if (uiop->uio_iov->iov_len <= siz) {
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uiop->uio_iovcnt--;
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uiop->uio_iov++;
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} else {
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uiop->uio_iov->iov_base += uiosiz;
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uiop->uio_iov->iov_len -= uiosiz;
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}
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siz -= uiosiz;
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}
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*dpos = mbufcp;
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*mrep = mp;
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if (rem > 0) {
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if (len < rem)
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error = nfs_adv(mrep, dpos, rem, len);
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else
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*dpos += rem;
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}
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return (error);
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}
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/*
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* copies a uio scatter/gather list to an mbuf chain...
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*/
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int
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nfsm_uiotombuf(uiop, mq, siz, bpos)
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register struct uio *uiop;
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struct mbuf **mq;
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int siz;
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caddr_t *bpos;
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{
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register char *uiocp;
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register struct mbuf *mp, *mp2;
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register int xfer, left, mlen;
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int uiosiz, clflg, rem;
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char *cp;
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if (siz > MLEN) /* or should it >= MCLBYTES ?? */
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clflg = 1;
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else
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clflg = 0;
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rem = nfsm_rndup(siz)-siz;
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mp = mp2 = *mq;
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while (siz > 0) {
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if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
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return (EINVAL);
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left = uiop->uio_iov->iov_len;
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uiocp = uiop->uio_iov->iov_base;
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if (left > siz)
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left = siz;
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uiosiz = left;
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while (left > 0) {
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mlen = M_TRAILINGSPACE(mp);
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if (mlen == 0) {
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MGET(mp, M_WAIT, MT_DATA);
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if (clflg)
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MCLGET(mp, M_WAIT);
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mp->m_len = 0;
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mp2->m_next = mp;
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mp2 = mp;
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mlen = M_TRAILINGSPACE(mp);
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}
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xfer = (left > mlen) ? mlen : left;
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#ifdef notdef
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/* Not Yet.. */
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if (uiop->uio_iov->iov_op != NULL)
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(*(uiop->uio_iov->iov_op))
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(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
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else
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#endif
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if (uiop->uio_segflg == UIO_SYSSPACE)
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bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
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else
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copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
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mp->m_len += xfer;
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left -= xfer;
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uiocp += xfer;
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uiop->uio_offset += xfer;
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uiop->uio_resid -= xfer;
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}
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if (uiop->uio_iov->iov_len <= siz) {
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uiop->uio_iovcnt--;
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uiop->uio_iov++;
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} else {
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uiop->uio_iov->iov_base += uiosiz;
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uiop->uio_iov->iov_len -= uiosiz;
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}
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siz -= uiosiz;
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}
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if (rem > 0) {
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if (rem > M_TRAILINGSPACE(mp)) {
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MGET(mp, M_WAIT, MT_DATA);
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mp->m_len = 0;
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mp2->m_next = mp;
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}
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cp = mtod(mp, caddr_t)+mp->m_len;
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for (left = 0; left < rem; left++)
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*cp++ = '\0';
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mp->m_len += rem;
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*bpos = cp;
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} else
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*bpos = mtod(mp, caddr_t)+mp->m_len;
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*mq = mp;
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return (0);
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}
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|
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/*
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* Help break down an mbuf chain by setting the first siz bytes contiguous
|
|
* pointed to by returned val.
|
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* This is used by the macros nfsm_dissect and nfsm_dissecton for tough
|
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* cases. (The macros use the vars. dpos and dpos2)
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*/
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int
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nfsm_disct(mdp, dposp, siz, left, cp2)
|
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struct mbuf **mdp;
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caddr_t *dposp;
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int siz;
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int left;
|
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caddr_t *cp2;
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{
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register struct mbuf *mp, *mp2;
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register int siz2, xfer;
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register caddr_t p;
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mp = *mdp;
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while (left == 0) {
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*mdp = mp = mp->m_next;
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if (mp == NULL)
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return (EBADRPC);
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left = mp->m_len;
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*dposp = mtod(mp, caddr_t);
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}
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if (left >= siz) {
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*cp2 = *dposp;
|
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*dposp += siz;
|
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} else if (mp->m_next == NULL) {
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return (EBADRPC);
|
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} else if (siz > MHLEN) {
|
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panic("nfs S too big");
|
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} else {
|
|
MGET(mp2, M_WAIT, MT_DATA);
|
|
mp2->m_next = mp->m_next;
|
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mp->m_next = mp2;
|
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mp->m_len -= left;
|
|
mp = mp2;
|
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*cp2 = p = mtod(mp, caddr_t);
|
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bcopy(*dposp, p, left); /* Copy what was left */
|
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siz2 = siz-left;
|
|
p += left;
|
|
mp2 = mp->m_next;
|
|
/* Loop around copying up the siz2 bytes */
|
|
while (siz2 > 0) {
|
|
if (mp2 == NULL)
|
|
return (EBADRPC);
|
|
xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2;
|
|
if (xfer > 0) {
|
|
bcopy(mtod(mp2, caddr_t), p, xfer);
|
|
NFSMADV(mp2, xfer);
|
|
mp2->m_len -= xfer;
|
|
p += xfer;
|
|
siz2 -= xfer;
|
|
}
|
|
if (siz2 > 0)
|
|
mp2 = mp2->m_next;
|
|
}
|
|
mp->m_len = siz;
|
|
*mdp = mp2;
|
|
*dposp = mtod(mp2, caddr_t);
|
|
}
|
|
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;
|
|
char *cp;
|
|
long siz;
|
|
{
|
|
register struct mbuf *m1 = 0, *m2;
|
|
long left, xfer, len, tlen;
|
|
u_long *tl;
|
|
int putsize;
|
|
|
|
putsize = 1;
|
|
m2 = *mb;
|
|
left = M_TRAILINGSPACE(m2);
|
|
if (left > 0) {
|
|
tl = ((u_long *)(*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_long *);
|
|
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 to initialize data structures...
|
|
*/
|
|
int
|
|
nfs_init()
|
|
{
|
|
register int i;
|
|
|
|
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_rejectedcred = txdr_unsigned(AUTH_REJECTCRED);
|
|
rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
|
|
rpc_auth_kerb = txdr_unsigned(RPCAUTH_NQNFS);
|
|
nfs_vers = txdr_unsigned(NFS_VER2);
|
|
nfs_prog = txdr_unsigned(NFS_PROG);
|
|
nfs_true = txdr_unsigned(TRUE);
|
|
nfs_false = txdr_unsigned(FALSE);
|
|
/* Loop thru nfs procids */
|
|
for (i = 0; i < NFS_NPROCS; i++)
|
|
nfs_procids[i] = txdr_unsigned(i);
|
|
/* Ensure async daemons disabled */
|
|
for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
|
|
nfs_iodwant[i] = (struct proc *)0;
|
|
TAILQ_INIT(&nfs_bufq);
|
|
nfs_xdrneg1 = txdr_unsigned(-1);
|
|
nfs_nhinit(); /* Init the nfsnode table */
|
|
nfsrv_init(0); /* Init server data structures */
|
|
nfsrv_initcache(); /* Init the server request cache */
|
|
|
|
/*
|
|
* Initialize the nqnfs server stuff.
|
|
*/
|
|
if (nqnfsstarttime == 0) {
|
|
nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease
|
|
+ nqsrv_clockskew + nqsrv_writeslack;
|
|
NQLOADNOVRAM(nqnfsstarttime);
|
|
nqnfs_prog = txdr_unsigned(NQNFS_PROG);
|
|
nqnfs_vers = txdr_unsigned(NQNFS_VER1);
|
|
nqthead.th_head[0] = &nqthead;
|
|
nqthead.th_head[1] = &nqthead;
|
|
nqfhead = hashinit(NQLCHSZ, M_NQLEASE, &nqfheadhash);
|
|
}
|
|
|
|
/*
|
|
* Initialize reply list and start timer
|
|
*/
|
|
nfsreqh.r_prev = nfsreqh.r_next = &nfsreqh;
|
|
nfs_timer(0);
|
|
|
|
/*
|
|
* Set up lease_check and lease_updatetime so that other parts
|
|
* of the system can call us, if we are loadable.
|
|
*/
|
|
lease_check = nfs_lease_check;
|
|
lease_updatetime = nfs_lease_updatetime;
|
|
vfsconf[MOUNT_NFS]->vfc_refcount++; /* make us non-unloadable */
|
|
#ifdef VFS_LKM
|
|
sysent[SYS_nfssvc].sy_narg = 2;
|
|
sysent[SYS_nfssvc].sy_call = nfssvc;
|
|
sysent[SYS_getfh].sy_narg = 2;
|
|
sysent[SYS_getfh].sy_call = getfh;
|
|
#endif
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* 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 nfsv2_fattr *fp;
|
|
extern int (**spec_nfsv2nodeop_p)();
|
|
register struct nfsnode *np, *nq, **nhpp;
|
|
register long t1;
|
|
caddr_t dpos, cp2;
|
|
int error = 0, isnq;
|
|
struct mbuf *md;
|
|
enum vtype vtyp;
|
|
u_short vmode;
|
|
long rdev;
|
|
struct timespec mtime;
|
|
struct vnode *nvp;
|
|
|
|
md = *mdp;
|
|
dpos = *dposp;
|
|
t1 = (mtod(md, caddr_t) + md->m_len) - dpos;
|
|
isnq = (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS);
|
|
error = nfsm_disct(&md, &dpos, NFSX_FATTR(isnq), t1, &cp2);
|
|
if (error)
|
|
return (error);
|
|
fp = (struct nfsv2_fattr *)cp2;
|
|
vtyp = nfstov_type(fp->fa_type);
|
|
vmode = fxdr_unsigned(u_short, fp->fa_mode);
|
|
if (vtyp == VNON || vtyp == VREG)
|
|
vtyp = IFTOVT(vmode);
|
|
if (isnq) {
|
|
rdev = fxdr_unsigned(long, fp->fa_nqrdev);
|
|
fxdr_nqtime(&fp->fa_nqmtime, &mtime);
|
|
} else {
|
|
rdev = fxdr_unsigned(long, fp->fa_nfsrdev);
|
|
fxdr_nfstime(&fp->fa_nfsmtime, &mtime);
|
|
}
|
|
/*
|
|
* 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 == VNON) {
|
|
if (vtyp == VCHR && rdev == 0xffffffff)
|
|
vp->v_type = vtyp = VFIFO;
|
|
else
|
|
vp->v_type = vtyp;
|
|
if (vp->v_type == VFIFO) {
|
|
extern int (**fifo_nfsv2nodeop_p)();
|
|
vp->v_op = fifo_nfsv2nodeop_p;
|
|
}
|
|
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.
|
|
*/
|
|
nq = np->n_forw;
|
|
if (nq)
|
|
nq->n_back = np->n_back;
|
|
*np->n_back = nq;
|
|
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;
|
|
nhpp = (struct nfsnode **)nfs_hash(&np->n_fh);
|
|
nq = *nhpp;
|
|
if (nq)
|
|
nq->n_back = &np->n_forw;
|
|
np->n_forw = nq;
|
|
np->n_back = nhpp;
|
|
*nhpp = np;
|
|
*vpp = vp = nvp;
|
|
}
|
|
}
|
|
np->n_mtime = mtime.ts_sec;
|
|
}
|
|
vap = &np->n_vattr;
|
|
vap->va_type = vtyp;
|
|
vap->va_mode = (vmode & 07777);
|
|
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_rdev = (dev_t)rdev;
|
|
vap->va_mtime = mtime;
|
|
vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
|
|
if (isnq) {
|
|
fxdr_hyper(&fp->fa_nqsize, &vap->va_size);
|
|
vap->va_blocksize = fxdr_unsigned(long, fp->fa_nqblocksize);
|
|
fxdr_hyper(&fp->fa_nqbytes, &vap->va_bytes);
|
|
vap->va_fileid = fxdr_unsigned(long, fp->fa_nqfileid);
|
|
fxdr_nqtime(&fp->fa_nqatime, &vap->va_atime);
|
|
vap->va_flags = fxdr_unsigned(u_long, fp->fa_nqflags);
|
|
fxdr_nqtime(&fp->fa_nqctime, &vap->va_ctime);
|
|
vap->va_gen = fxdr_unsigned(u_long, fp->fa_nqgen);
|
|
fxdr_hyper(&fp->fa_nqfilerev, &vap->va_filerev);
|
|
} else {
|
|
vap->va_size = fxdr_unsigned(u_long, fp->fa_nfssize);
|
|
vap->va_blocksize = fxdr_unsigned(long, fp->fa_nfsblocksize);
|
|
vap->va_bytes = fxdr_unsigned(long, fp->fa_nfsblocks) * NFS_FABLKSIZE;
|
|
vap->va_fileid = fxdr_unsigned(long, fp->fa_nfsfileid);
|
|
fxdr_nfstime(&fp->fa_nfsatime, &vap->va_atime);
|
|
vap->va_flags = 0;
|
|
vap->va_ctime.ts_sec = fxdr_unsigned(long, fp->fa_nfsctime.nfs_sec);
|
|
vap->va_ctime.ts_nsec = 0;
|
|
vap->va_gen = fxdr_unsigned(u_long, fp->fa_nfsctime.nfs_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;
|
|
*dposp = dpos;
|
|
*mdp = md;
|
|
if (vaper != NULL) {
|
|
bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
|
|
#ifdef notdef
|
|
if ((np->n_flag & NMODIFIED) && np->n_size > vap->va_size)
|
|
if (np->n_size > vap->va_size)
|
|
vaper->va_size = np->n_size;
|
|
#endif
|
|
if (np->n_flag & NCHG) {
|
|
if (np->n_flag & NACC) {
|
|
vaper->va_atime.ts_sec = np->n_atim.tv_sec;
|
|
vaper->va_atime.ts_nsec =
|
|
np->n_atim.tv_usec * 1000;
|
|
}
|
|
if (np->n_flag & NUPD) {
|
|
vaper->va_mtime.ts_sec = np->n_mtim.tv_sec;
|
|
vaper->va_mtime.ts_nsec =
|
|
np->n_mtim.tv_usec * 1000;
|
|
}
|
|
}
|
|
}
|
|
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 (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQLOOKLEASE) {
|
|
if (!NQNFS_CKCACHABLE(vp, NQL_READ) || np->n_attrstamp == 0) {
|
|
nfsstats.attrcache_misses++;
|
|
return (ENOENT);
|
|
}
|
|
} else 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));
|
|
#ifdef notdef
|
|
if ((np->n_flag & NMODIFIED) == 0) {
|
|
np->n_size = vaper->va_size;
|
|
vnode_pager_setsize(vp, (u_long)np->n_size);
|
|
} else if (np->n_size > vaper->va_size)
|
|
if (np->n_size > vaper->va_size)
|
|
vaper->va_size = np->n_size;
|
|
#endif
|
|
if (np->n_flag & NCHG) {
|
|
if (np->n_flag & NACC) {
|
|
vaper->va_atime.ts_sec = np->n_atim.tv_sec;
|
|
vaper->va_atime.ts_nsec = np->n_atim.tv_usec * 1000;
|
|
}
|
|
if (np->n_flag & NUPD) {
|
|
vaper->va_mtime.ts_sec = np->n_mtim.tv_sec;
|
|
vaper->va_mtime.ts_nsec = np->n_mtim.tv_usec * 1000;
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Set up nameidata for a lookup() call and do it
|
|
*/
|
|
int
|
|
nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, p)
|
|
register struct nameidata *ndp;
|
|
fhandle_t *fhp;
|
|
int len;
|
|
struct nfssvc_sock *slp;
|
|
struct mbuf *nam;
|
|
struct mbuf **mdp;
|
|
caddr_t *dposp;
|
|
struct proc *p;
|
|
{
|
|
register int i, rem;
|
|
register struct mbuf *md;
|
|
register char *fromcp, *tocp;
|
|
struct vnode *dp;
|
|
int error, rdonly;
|
|
struct componentname *cnp = &ndp->ni_cnd;
|
|
|
|
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;
|
|
cnp->cn_hash = 0;
|
|
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 = EINVAL;
|
|
goto out;
|
|
}
|
|
cnp->cn_hash += (unsigned char)*fromcp;
|
|
*tocp++ = *fromcp++;
|
|
rem--;
|
|
}
|
|
*tocp = '\0';
|
|
*mdp = md;
|
|
*dposp = fromcp;
|
|
len = nfsm_rndup(len)-len;
|
|
if (len > 0) {
|
|
if (rem >= len)
|
|
*dposp += len;
|
|
else {
|
|
error = nfs_adv(mdp, dposp, len, rem);
|
|
if (error)
|
|
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);
|
|
if (error)
|
|
goto out;
|
|
if (dp->v_type != VDIR) {
|
|
vrele(dp);
|
|
error = ENOTDIR;
|
|
goto out;
|
|
}
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
fhandle_t *fhp;
|
|
int lockflag;
|
|
struct vnode **vpp;
|
|
struct ucred *cred;
|
|
struct nfssvc_sock *slp;
|
|
struct mbuf *nam;
|
|
int *rdonlyp;
|
|
{
|
|
register struct mount *mp;
|
|
register struct nfsuid *uidp;
|
|
register int i;
|
|
struct ucred *credanon;
|
|
int error, exflags;
|
|
|
|
*vpp = (struct vnode *)0;
|
|
mp = getvfs(&fhp->fh_fsid);
|
|
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) {
|
|
uidp = slp->ns_uidh[NUIDHASH(cred->cr_uid)];
|
|
while (uidp) {
|
|
if (uidp->nu_uid == cred->cr_uid)
|
|
break;
|
|
uidp = uidp->nu_hnext;
|
|
}
|
|
if (uidp) {
|
|
cred->cr_uid = uidp->nu_cr.cr_uid;
|
|
for (i = 0; i < uidp->nu_cr.cr_ngroups; i++)
|
|
cred->cr_groups[i] = uidp->nu_cr.cr_groups[i];
|
|
} else {
|
|
vput(*vpp);
|
|
return (NQNFS_AUTHERR);
|
|
}
|
|
} else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) {
|
|
cred->cr_uid = credanon->cr_uid;
|
|
for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++)
|
|
cred->cr_groups[i] = credanon->cr_groups[i];
|
|
}
|
|
if (exflags & MNT_EXRDONLY)
|
|
*rdonlyp = 1;
|
|
else
|
|
*rdonlyp = 0;
|
|
if (!lockflag)
|
|
VOP_UNLOCK(*vpp);
|
|
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);
|
|
}
|