582 lines
14 KiB
C
582 lines
14 KiB
C
/* $OpenBSD: mount_nfs.c,v 1.55 2020/01/22 06:24:08 tedu Exp $ */
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/* $NetBSD: mount_nfs.c,v 1.12.4.1 1996/05/25 22:48:05 fvdl Exp $ */
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/*
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* Copyright (c) 1992, 1993, 1994
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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. 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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#include <sys/types.h>
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#include <sys/mount.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <syslog.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#include <rpc/pmap_prot.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfs/nfs.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <netdb.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <limits.h>
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#include "mntopts.h"
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#define ALTF_BG 0x1
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#define ALTF_NOCONN 0x2
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#define ALTF_DUMBTIMR 0x4
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#define ALTF_INTR 0x8
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#define ALTF_NFSV3 0x20
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#define ALTF_RDIRPLUS 0x40
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#define ALTF_MNTUDP 0x80
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#define ALTF_RESVPORT 0x100
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#define ALTF_SEQPACKET 0x200
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#define ALTF_SOFT 0x800
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#define ALTF_TCP 0x1000
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#define ALTF_PORT 0x2000
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#define ALTF_NFSV2 0x4000
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#define ALTF_NOAC 0x8000
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#define ALTF_ACREGMIN 0x10000
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#define ALTF_ACREGMAX 0x20000
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#define ALTF_ACDIRMIN 0x40000
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#define ALTF_ACDIRMAX 0x80000
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const struct mntopt mopts[] = {
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MOPT_STDOPTS,
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MOPT_WXALLOWED,
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MOPT_FORCE,
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MOPT_UPDATE,
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MOPT_SYNC,
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{ "bg", ALTF_BG, 0 },
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{ "conn", ALTF_NOCONN, MFLAG_INVERSE },
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{ "dumbtimer", ALTF_DUMBTIMR, 0 },
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{ "intr", ALTF_INTR, 0 },
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{ "nfsv3", ALTF_NFSV3, 0 },
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{ "rdirplus", ALTF_RDIRPLUS, 0 },
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{ "mntudp", ALTF_MNTUDP, 0 },
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{ "resvport", ALTF_RESVPORT, 0 },
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{ "soft", ALTF_SOFT, 0 },
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{ "tcp", ALTF_TCP, 0 },
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{ "port", ALTF_PORT, MFLAG_INTVAL },
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{ "nfsv2", ALTF_NFSV2, 0 },
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{ "ac", ALTF_NOAC, MFLAG_INVERSE },
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{ "acregmin", ALTF_ACREGMIN, MFLAG_INTVAL },
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{ "acregmax", ALTF_ACREGMAX, MFLAG_INTVAL },
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{ "acdirmin", ALTF_ACDIRMIN, MFLAG_INTVAL },
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{ "acdirmax", ALTF_ACDIRMAX, MFLAG_INTVAL },
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{ NULL }
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};
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struct nfs_args nfsdefargs = {
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NFS_ARGSVERSION,
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NULL,
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sizeof (struct sockaddr_in),
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SOCK_DGRAM,
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0,
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NULL,
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0,
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NFSMNT_NFSV3,
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NFS_WSIZE,
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NFS_RSIZE,
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NFS_READDIRSIZE,
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10,
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NFS_RETRANS,
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NFS_MAXGRPS,
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NFS_DEFRAHEAD,
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0,
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0,
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NULL,
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0,
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0,
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0,
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0
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};
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struct nfhret {
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u_long stat;
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long vers;
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long auth;
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long fhsize;
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u_char nfh[NFSX_V3FHMAX];
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};
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#define DEF_RETRY 10000
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#define BGRND 1
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#define ISBGRND 2
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int retrycnt;
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int opflags = 0;
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int nfsproto = IPPROTO_UDP;
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int mnttcp_ok = 1;
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u_short port_no = 0;
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int force2 = 0;
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int force3 = 0;
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int getnfsargs(char *, struct nfs_args *);
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void set_rpc_maxgrouplist(int);
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__dead void usage(void);
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int xdr_dir(XDR *, char *);
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int xdr_fh(XDR *, struct nfhret *);
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int
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main(int argc, char *argv[])
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{
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int c;
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struct nfs_args *nfsargsp;
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struct nfs_args nfsargs;
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int mntflags, num;
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char name[PATH_MAX], *options = NULL, *spec;
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const char *p;
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union mntval value;
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retrycnt = DEF_RETRY;
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mntflags = 0;
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nfsargs = nfsdefargs;
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nfsargsp = &nfsargs;
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while ((c = getopt(argc, argv,
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"23a:bcdD:g:I:iL:lo:PR:r:sTt:w:x:U")) != -1)
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switch (c) {
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case '3':
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if (force2)
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errx(1, "-2 and -3 are mutually exclusive");
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force3 = 1;
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break;
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case '2':
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if (force3)
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errx(1, "-2 and -3 are mutually exclusive");
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force2 = 1;
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nfsargsp->flags &= ~NFSMNT_NFSV3;
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break;
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case 'a':
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num = (int) strtonum(optarg, 0, 4, &p);
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if (p)
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errx(1, "illegal -a value %s: %s", optarg, p);
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nfsargsp->readahead = num;
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nfsargsp->flags |= NFSMNT_READAHEAD;
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break;
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case 'b':
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opflags |= BGRND;
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break;
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case 'c':
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nfsargsp->flags |= NFSMNT_NOCONN;
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break;
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case 'D':
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/* backward compatibility */
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break;
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case 'd':
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nfsargsp->flags |= NFSMNT_DUMBTIMR;
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break;
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case 'g':
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num = (int) strtonum(optarg, 1, NGROUPS_MAX, &p);
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if (p)
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errx(1, "illegal -g value %s: %s", optarg, p);
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set_rpc_maxgrouplist(num);
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nfsargsp->maxgrouplist = num;
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nfsargsp->flags |= NFSMNT_MAXGRPS;
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break;
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case 'I':
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num = (int) strtonum(optarg, 1, INT_MAX, &p);
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if (p)
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errx(1, "illegal -I value %s: %s", optarg, p);
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nfsargsp->readdirsize = num;
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nfsargsp->flags |= NFSMNT_READDIRSIZE;
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break;
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case 'i':
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nfsargsp->flags |= NFSMNT_INT;
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break;
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case 'L':
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/* backward compatibility */
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break;
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case 'l':
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nfsargsp->flags |= NFSMNT_RDIRPLUS;
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break;
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case 'o':
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options = optarg;
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while (options != NULL) {
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switch (getmntopt(&options, &value, mopts,
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&mntflags)) {
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case ALTF_BG:
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opflags |= BGRND;
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break;
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case ALTF_NOCONN:
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nfsargsp->flags |= NFSMNT_NOCONN;
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break;
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case ALTF_DUMBTIMR:
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nfsargsp->flags |= NFSMNT_DUMBTIMR;
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break;
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case ALTF_INTR:
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nfsargsp->flags |= NFSMNT_INT;
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break;
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case ALTF_NFSV3:
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if (force2)
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errx(1,
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"conflicting version options");
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force3 = 1;
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break;
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case ALTF_NFSV2:
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if (force3)
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errx(1,
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"conflicting version options");
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force2 = 1;
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nfsargsp->flags &= ~NFSMNT_NFSV3;
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break;
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case ALTF_RDIRPLUS:
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nfsargsp->flags |= NFSMNT_RDIRPLUS;
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break;
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case ALTF_MNTUDP:
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mnttcp_ok = 0;
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break;
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case ALTF_RESVPORT:
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nfsargsp->flags |= NFSMNT_RESVPORT;
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break;
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case ALTF_SOFT:
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nfsargsp->flags |= NFSMNT_SOFT;
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break;
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case ALTF_TCP:
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nfsargsp->sotype = SOCK_STREAM;
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nfsproto = IPPROTO_TCP;
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break;
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case ALTF_PORT:
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port_no = value.ival;
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break;
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case ALTF_NOAC:
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nfsargsp->flags |= (NFSMNT_ACREGMIN |
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NFSMNT_ACREGMAX | NFSMNT_ACDIRMIN |
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NFSMNT_ACDIRMAX);
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nfsargsp->acregmin = 0;
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nfsargsp->acregmax = 0;
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nfsargsp->acdirmin = 0;
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nfsargsp->acdirmax = 0;
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break;
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case ALTF_ACREGMIN:
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nfsargsp->flags |= NFSMNT_ACREGMIN;
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nfsargsp->acregmin = value.ival;
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break;
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case ALTF_ACREGMAX:
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nfsargsp->flags |= NFSMNT_ACREGMAX;
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nfsargsp->acregmax = value.ival;
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break;
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case ALTF_ACDIRMIN:
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nfsargsp->flags |= NFSMNT_ACDIRMIN;
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nfsargsp->acdirmin = value.ival;
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break;
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case ALTF_ACDIRMAX:
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nfsargsp->flags |= NFSMNT_ACDIRMAX;
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nfsargsp->acdirmax = value.ival;
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break;
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}
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}
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break;
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case 'P':
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/* backward compatibility */
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break;
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case 'R':
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num = (int) strtonum(optarg, 1, INT_MAX, &p);
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if (p)
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errx(1, "illegal -R value %s: %s", optarg, p);
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retrycnt = num;
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break;
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case 'r':
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num = (int) strtonum(optarg, 1, INT_MAX, &p);
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if (p)
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errx(1, "illegal -r value %s: %s", optarg, p);
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nfsargsp->rsize = num;
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nfsargsp->flags |= NFSMNT_RSIZE;
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break;
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case 's':
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nfsargsp->flags |= NFSMNT_SOFT;
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break;
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case 'T':
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nfsargsp->sotype = SOCK_STREAM;
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nfsproto = IPPROTO_TCP;
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break;
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case 't':
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num = (int) strtonum(optarg, 1, INT_MAX, &p);
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if (p)
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errx(1, "illegal -t value %s: %s", optarg, p);
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nfsargsp->timeo = num;
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nfsargsp->flags |= NFSMNT_TIMEO;
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break;
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case 'w':
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num = (int) strtonum(optarg, 1, INT_MAX, &p);
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if (p)
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errx(1, "illegal -w value %s: %s", optarg, p);
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nfsargsp->wsize = num;
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nfsargsp->flags |= NFSMNT_WSIZE;
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break;
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case 'x':
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num = (int) strtonum(optarg, 1, INT_MAX, &p);
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if (p)
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errx(1, "illegal -x value %s: %s", optarg, p);
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nfsargsp->retrans = num;
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nfsargsp->flags |= NFSMNT_RETRANS;
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break;
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case 'U':
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mnttcp_ok = 0;
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break;
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default:
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usage();
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/* NOTREACHED */
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}
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argc -= optind;
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argv += optind;
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if (argc != 2)
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usage();
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spec = *argv++;
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if (realpath(*argv, name) == NULL)
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err(1, "realpath %s", *argv);
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if (!getnfsargs(spec, nfsargsp))
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exit(1);
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if (mount(MOUNT_NFS, name, mntflags, nfsargsp)) {
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if (errno == EOPNOTSUPP)
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errx(1, "%s: Filesystem not supported by kernel", name);
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else
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err(1, "%s", name);
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}
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exit(0);
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}
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int
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getnfsargs(char *spec, struct nfs_args *nfsargsp)
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{
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CLIENT *clp;
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struct hostent *hp;
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static struct sockaddr_in saddr;
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struct timeval pertry, try;
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enum clnt_stat clnt_stat;
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int so = RPC_ANYSOCK, i, nfsvers, mntvers, orgcnt;
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char *hostp, *delimp;
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u_short tport;
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static struct nfhret nfhret;
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static char nam[MNAMELEN + 1];
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if (strlcpy(nam, spec, sizeof(nam)) >= sizeof(nam)) {
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errx(1, "hostname too long");
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}
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if ((delimp = strchr(spec, '@')) != NULL) {
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hostp = delimp + 1;
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} else if ((delimp = strchr(spec, ':')) != NULL) {
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hostp = spec;
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spec = delimp + 1;
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} else {
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warnx("no <host>:<dirpath> or <dirpath>@<host> spec");
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return (0);
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}
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*delimp = '\0';
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/*
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* Handle an internet host address
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*/
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if (inet_aton(hostp, &saddr.sin_addr) == 0) {
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hp = gethostbyname(hostp);
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if (hp == NULL) {
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warnx("can't resolve address for host %s", hostp);
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return (0);
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}
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memcpy(&saddr.sin_addr, hp->h_addr, hp->h_length);
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}
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|
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if (force2) {
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nfsvers = NFS_VER2;
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mntvers = RPCMNT_VER1;
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} else {
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nfsvers = NFS_VER3;
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mntvers = RPCMNT_VER3;
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}
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orgcnt = retrycnt;
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tryagain:
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nfhret.stat = EACCES; /* Mark not yet successful */
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while (retrycnt > 0) {
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saddr.sin_family = AF_INET;
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saddr.sin_port = htons(PMAPPORT);
|
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if ((tport = port_no ? port_no : pmap_getport(&saddr,
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RPCPROG_NFS, nfsvers, nfsargsp->sotype == SOCK_STREAM ?
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IPPROTO_TCP : IPPROTO_UDP)) == 0) {
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if ((opflags & ISBGRND) == 0)
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clnt_pcreateerror("NFS Portmap");
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} else {
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saddr.sin_port = 0;
|
|
pertry.tv_sec = 10;
|
|
pertry.tv_usec = 0;
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if (mnttcp_ok && nfsargsp->sotype == SOCK_STREAM)
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clp = clnttcp_create(&saddr, RPCPROG_MNT, mntvers,
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&so, 0, 0);
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else
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clp = clntudp_create(&saddr, RPCPROG_MNT, mntvers,
|
|
pertry, &so);
|
|
if (clp == NULL) {
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|
if ((opflags & ISBGRND) == 0)
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clnt_pcreateerror("Cannot MNT RPC");
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} else {
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|
clp->cl_auth = authunix_create_default();
|
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try.tv_sec = 10;
|
|
try.tv_usec = 0;
|
|
nfhret.auth = RPCAUTH_UNIX;
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|
nfhret.vers = mntvers;
|
|
clnt_stat = clnt_call(clp, RPCMNT_MOUNT,
|
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xdr_dir, spec, xdr_fh, &nfhret, try);
|
|
if (clnt_stat != RPC_SUCCESS) {
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|
if (clnt_stat == RPC_PROGVERSMISMATCH) {
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|
if (nfsvers == NFS_VER3 &&
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!force3) {
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|
retrycnt = orgcnt;
|
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nfsvers = NFS_VER2;
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|
mntvers = RPCMNT_VER1;
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|
nfsargsp->flags &=
|
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~NFSMNT_NFSV3;
|
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goto tryagain;
|
|
} else {
|
|
warnx("%s",
|
|
clnt_sperror(clp,
|
|
"MNT RPC"));
|
|
}
|
|
}
|
|
if ((opflags & ISBGRND) == 0)
|
|
warnx("%s", clnt_sperror(clp,
|
|
"bad MNT RPC"));
|
|
} else {
|
|
auth_destroy(clp->cl_auth);
|
|
clnt_destroy(clp);
|
|
retrycnt = 0;
|
|
}
|
|
}
|
|
}
|
|
if (--retrycnt > 0) {
|
|
if (opflags & BGRND) {
|
|
opflags &= ~BGRND;
|
|
if ((i = fork())) {
|
|
if (i == -1)
|
|
err(1, "fork");
|
|
exit(0);
|
|
}
|
|
(void) setsid();
|
|
(void) close(STDIN_FILENO);
|
|
(void) close(STDOUT_FILENO);
|
|
(void) close(STDERR_FILENO);
|
|
(void) chdir("/");
|
|
opflags |= ISBGRND;
|
|
}
|
|
sleep(60);
|
|
}
|
|
}
|
|
if (nfhret.stat) {
|
|
if (opflags & ISBGRND)
|
|
exit(1);
|
|
warnc(nfhret.stat, "can't access %s", spec);
|
|
return (0);
|
|
}
|
|
saddr.sin_port = htons(tport);
|
|
nfsargsp->addr = (struct sockaddr *) &saddr;
|
|
nfsargsp->addrlen = sizeof (saddr);
|
|
nfsargsp->fh = nfhret.nfh;
|
|
nfsargsp->fhsize = nfhret.fhsize;
|
|
nfsargsp->hostname = nam;
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* xdr routines for mount rpc's
|
|
*/
|
|
int
|
|
xdr_dir(XDR *xdrsp, char *dirp)
|
|
{
|
|
return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
|
|
}
|
|
|
|
int
|
|
xdr_fh(XDR *xdrsp, struct nfhret *np)
|
|
{
|
|
int i;
|
|
long auth, authcnt, authfnd = 0;
|
|
|
|
if (!xdr_u_long(xdrsp, &np->stat))
|
|
return (0);
|
|
if (np->stat)
|
|
return (1);
|
|
switch (np->vers) {
|
|
case 1:
|
|
np->fhsize = NFSX_V2FH;
|
|
return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH));
|
|
case 3:
|
|
if (!xdr_long(xdrsp, &np->fhsize))
|
|
return (0);
|
|
if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX)
|
|
return (0);
|
|
if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
|
|
return (0);
|
|
if (!xdr_long(xdrsp, &authcnt))
|
|
return (0);
|
|
for (i = 0; i < authcnt; i++) {
|
|
if (!xdr_long(xdrsp, &auth))
|
|
return (0);
|
|
if (auth == np->auth)
|
|
authfnd++;
|
|
}
|
|
/*
|
|
* Some servers, such as DEC's OSF/1 return a nil authenticator
|
|
* list to indicate RPCAUTH_UNIX.
|
|
*/
|
|
if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX))
|
|
np->stat = EAUTH;
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
__dead void
|
|
usage(void)
|
|
{
|
|
extern char *__progname;
|
|
|
|
(void)fprintf(stderr,
|
|
"usage: %s [-23bcdilsTU] [-a maxreadahead] [-g maxgroups]\n"
|
|
"\t[-I readdirsize] [-o options] [-R retrycnt] [-r readsize]\n"
|
|
"\t[-t timeout] [-w writesize] [-x retrans] rhost:path node\n",
|
|
__progname);
|
|
exit(1);
|
|
}
|