266 lines
8.2 KiB
C
266 lines
8.2 KiB
C
/* $NetBSD: getnfsargs_small.c,v 1.10 2013/06/29 22:56:26 christos Exp $ */
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/*-
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* Copyright (c) 2006 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by David Laight.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1993 John Brezak
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* All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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/cdefs.h>
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__RCSID("$NetBSD: getnfsargs_small.c,v 1.10 2013/06/29 22:56:26 christos Exp $");
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#include <sys/param.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 <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfs/nfs.h>
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#include <nfs/nfsmount.h>
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#include <arpa/inet.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 <util.h>
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#include "mount_nfs.h"
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#include "iodesc.h"
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typedef int32_t n_long;
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#include "rpc.h"
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#define RPC_HEADER_WORDS 28 /* more than enough */
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#define FNAME_SIZE 512
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struct nfhret {
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long fhsize;
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u_char nfh[NFSX_V3FHMAX];
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};
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int retrycnt = DEF_RETRY;
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int opflags = 0;
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int force2 = 0;
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int force3 = 0;
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int mnttcp_ok = 1;
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int port = 0;
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/* Ripped from src/sys/arch/i386/stand/libsa/nfs.c */
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static int
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nfs_getrootfh(struct iodesc *d, const char *path, int mntvers, struct nfhret *nfhret)
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{
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size_t len;
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struct args {
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uint32_t len;
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char path[FNAME_SIZE];
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} *args;
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struct repl {
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uint32_t errval;
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u_char fh[NFSX_V3FHMAX];
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} *repl;
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struct {
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uint32_t h[RPC_HEADER_WORDS];
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struct args d;
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} sdata;
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struct {
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uint32_t h[RPC_HEADER_WORDS];
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struct repl d;
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} rdata;
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ssize_t cc;
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args = &sdata.d;
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repl = &rdata.d;
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memset(args, 0, sizeof(*args));
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len = strlen(path);
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if (len > sizeof(args->path))
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len = sizeof(args->path);
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args->len = htonl(len);
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memcpy(args->path, path, len);
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len = 4 + roundup(len, 4);
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cc = rpc_call(d, RPCPROG_MNT, mntvers, RPCMNT_MOUNT,
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args, len, repl, sizeof(*repl));
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if (cc == -1) {
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/* errno was set by rpc_call */
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return errno;
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}
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if (cc < 4)
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return EBADRPC;
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if (repl->errval)
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return ntohl(repl->errval);
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nfhret->fhsize = cc;
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memcpy(nfhret->nfh, repl->fh, sizeof(repl->fh));
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return 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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struct addrinfo hints, *ai_nfs;
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int ecode;
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int nfsvers, mntvers;
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char *hostp, *delimp;
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static struct nfhret nfhret;
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static char nam[MNAMELEN + 1];
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struct iodesc d;
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int nfs_port;
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strlcpy(nam, spec, sizeof(nam));
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if ((delimp = strchr(spec, '@')) != NULL) {
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hostp = delimp + 1;
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} else if ((delimp = strrchr(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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memset(&hints, 0, sizeof hints);
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hints.ai_socktype = nfsargsp->sotype;
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if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) {
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warnx("can't get net id for host \"%s\": %s", hostp,
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gai_strerror(ecode));
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return 0;
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}
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if ((nfsargsp->flags & NFSMNT_NFSV3) != 0) {
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nfsvers = NFS_VER3;
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mntvers = RPCMNT_VER3;
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} else {
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nfsvers = NFS_VER2;
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mntvers = RPCMNT_VER1;
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}
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d.socket = -1;
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for (d.ai = ai_nfs; ; d.ai = d.ai->ai_next) {
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if (d.ai == NULL) {
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if (nfsvers == NFS_VER3 && !force3) {
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nfsvers = NFS_VER2;
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mntvers = RPCMNT_VER1;
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d.ai = ai_nfs;
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continue;
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}
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return 0;
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}
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nfs_port = rpc_getport(&d, RPCPROG_NFS, nfsvers);
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if (nfs_port == -1)
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continue;
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if (nfs_getrootfh(&d, spec, mntvers, &nfhret) == 0)
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break;
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}
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if (port != 0)
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nfs_port = port;
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set_port(d.ai->ai_addr, htons(nfs_port));
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nfsargsp->hostname = nam;
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nfsargsp->addr = d.ai->ai_addr;
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nfsargsp->addrlen = d.ai->ai_addrlen;
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nfsargsp->fh = nfhret.nfh;
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if (nfsvers == NFS_VER3) {
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nfsargsp->fhsize = be32dec(nfhret.nfh);
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nfsargsp->fh += sizeof(uint32_t);
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} else {
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nfsargsp->fhsize = NFSX_V2FH;
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nfsargsp->flags &= ~NFSMNT_NFSV3;
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}
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return 1;
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}
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