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![Rick Macklem](/assets/img/avatar_default.png)
If the "intr" and/or "soft" mount options are used for NFSv4 mounts, the protocol can be broken when the operation returns without waiting for the RPC reply. The likelyhood of failure increases for NFSv4.1/4.2 mounts, since the session slot will be broken when an RPC reply is not processed. This is mentioned in the BUGS section of "man mount_nfs", but more needs to be done. This patch adds code that generates a warning message when the mount is done. PR: 260011 Reviewed by: emaste MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D35407
1130 lines
29 KiB
C
1130 lines
29 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1992, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/linker.h>
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#include <sys/module.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 <sys/syslog.h>
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#include <sys/uio.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 <rpcsvc/nfs_prot.h>
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#include <rpcsvc/mount.h>
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#include <fs/nfs/nfsproto.h>
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#include <fs/nfs/nfsv4_errstr.h>
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#include <arpa/inet.h>
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#include <net/route.h>
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#include <net/if.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 <stdbool.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 <strings.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include "mntopts.h"
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#include "mounttab.h"
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/* Table for af,sotype -> netid conversions. */
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static struct nc_protos {
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const char *netid;
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int af;
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int sotype;
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} nc_protos[] = {
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{"udp", AF_INET, SOCK_DGRAM},
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{"tcp", AF_INET, SOCK_STREAM},
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{"udp6", AF_INET6, SOCK_DGRAM},
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{"tcp6", AF_INET6, SOCK_STREAM},
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{NULL, 0, 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[NFS3_FHSIZE];
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};
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#define BGRND 0x01
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#define ISBGRND 0x02
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#define OF_NOINET4 0x04
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#define OF_NOINET6 0x08
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#define BGRNDNOW 0x10
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static int retrycnt = -1;
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static int opflags = 0;
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static int nfsproto = IPPROTO_TCP;
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static int mnttcp_ok = 1;
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static int noconn = 0;
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/* The 'portspec' is the server nfs port; NULL means look up via rpcbind. */
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static const char *portspec = NULL;
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static struct sockaddr *addr;
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static int addrlen = 0;
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static u_char *fh = NULL;
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static int fhsize = 0;
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static int secflavor = -1;
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static int got_principal = 0;
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static enum mountmode {
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ANY,
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V2,
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V3,
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V4
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} mountmode = ANY;
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/* Return codes for nfs_tryproto. */
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enum tryret {
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TRYRET_SUCCESS,
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TRYRET_TIMEOUT, /* No response received. */
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TRYRET_REMOTEERR, /* Error received from remote server. */
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TRYRET_LOCALERR /* Local failure. */
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};
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static int sec_name_to_num(const char *sec);
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static const char *sec_num_to_name(int num);
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static int getnfsargs(char **, char **, struct iovec **iov, int *iovlen);
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/* void set_rpc_maxgrouplist(int); */
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static struct netconfig *getnetconf_cached(const char *netid);
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static const char *netidbytype(int af, int sotype);
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static void usage(void) __dead2;
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static int xdr_dir(XDR *, char *);
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static int xdr_fh(XDR *, struct nfhret *);
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static enum tryret nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec,
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char **errstr, struct iovec **iov, int *iovlen);
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static enum tryret returncode(enum clnt_stat stat, struct rpc_err *rpcerr);
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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 iovec *iov;
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int num, iovlen;
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char *host, *mntname, *p, *spec, *tmp;
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char mntpath[MAXPATHLEN], errmsg[255];
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char hostname[MAXHOSTNAMELEN + 1], gssn[MAXHOSTNAMELEN + 50];
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const char *gssname, *nmount_errstr;
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bool softintr;
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softintr = false;
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iov = NULL;
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iovlen = 0;
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memset(errmsg, 0, sizeof(errmsg));
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gssname = NULL;
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while ((c = getopt(argc, argv,
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"23a:bcdD:g:I:iLlNo:PR:r:sTt:w:x:U")) != -1)
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switch (c) {
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case '2':
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mountmode = V2;
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break;
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case '3':
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mountmode = V3;
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break;
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case 'a':
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printf("-a deprecated, use -o readahead=<value>\n");
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build_iovec(&iov, &iovlen, "readahead", optarg, (size_t)-1);
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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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printf("-c deprecated, use -o noconn\n");
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build_iovec(&iov, &iovlen, "noconn", NULL, 0);
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noconn = 1;
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break;
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case 'D':
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printf("-D deprecated, use -o deadthresh=<value>\n");
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build_iovec(&iov, &iovlen, "deadthresh", optarg, (size_t)-1);
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break;
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case 'd':
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printf("-d deprecated, use -o dumbtimer");
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build_iovec(&iov, &iovlen, "dumbtimer", NULL, 0);
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break;
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case 'g':
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printf("-g deprecated, use -o maxgroups");
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num = strtol(optarg, &p, 10);
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if (*p || num <= 0)
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errx(1, "illegal -g value -- %s", optarg);
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//set_rpc_maxgrouplist(num);
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build_iovec(&iov, &iovlen, "maxgroups", optarg, (size_t)-1);
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break;
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case 'I':
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printf("-I deprecated, use -o readdirsize=<value>\n");
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build_iovec(&iov, &iovlen, "readdirsize", optarg, (size_t)-1);
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break;
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case 'i':
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printf("-i deprecated, use -o intr\n");
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build_iovec(&iov, &iovlen, "intr", NULL, 0);
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softintr = true;
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break;
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case 'L':
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printf("-L deprecated, use -o nolockd\n");
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build_iovec(&iov, &iovlen, "nolockd", NULL, 0);
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break;
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case 'l':
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printf("-l deprecated, -o rdirplus\n");
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build_iovec(&iov, &iovlen, "rdirplus", NULL, 0);
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break;
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case 'N':
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printf("-N deprecated, do not specify -o resvport\n");
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break;
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case 'o': {
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int pass_flag_to_nmount;
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char *opt = optarg;
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while (opt) {
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char *pval = NULL;
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char *pnextopt = NULL;
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const char *val = "";
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pass_flag_to_nmount = 1;
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pnextopt = strchr(opt, ',');
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if (pnextopt != NULL) {
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*pnextopt = '\0';
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pnextopt++;
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}
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pval = strchr(opt, '=');
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if (pval != NULL) {
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*pval = '\0';
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val = pval + 1;
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}
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if (strcmp(opt, "bg") == 0) {
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opflags |= BGRND;
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pass_flag_to_nmount=0;
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} else if (strcmp(opt, "bgnow") == 0) {
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opflags |= BGRNDNOW;
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pass_flag_to_nmount=0;
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} else if (strcmp(opt, "fg") == 0) {
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/* same as not specifying -o bg */
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pass_flag_to_nmount=0;
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} else if (strcmp(opt, "gssname") == 0) {
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pass_flag_to_nmount = 0;
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gssname = val;
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} else if (strcmp(opt, "mntudp") == 0) {
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mnttcp_ok = 0;
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nfsproto = IPPROTO_UDP;
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} else if (strcmp(opt, "udp") == 0) {
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nfsproto = IPPROTO_UDP;
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} else if (strcmp(opt, "tcp") == 0) {
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nfsproto = IPPROTO_TCP;
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} else if (strcmp(opt, "noinet4") == 0) {
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pass_flag_to_nmount=0;
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opflags |= OF_NOINET4;
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} else if (strcmp(opt, "noinet6") == 0) {
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pass_flag_to_nmount=0;
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opflags |= OF_NOINET6;
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} else if (strcmp(opt, "noconn") == 0) {
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noconn = 1;
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} else if (strcmp(opt, "nfsv2") == 0) {
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pass_flag_to_nmount=0;
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mountmode = V2;
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} else if (strcmp(opt, "nfsv3") == 0) {
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mountmode = V3;
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} else if (strcmp(opt, "nfsv4") == 0) {
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pass_flag_to_nmount=0;
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mountmode = V4;
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nfsproto = IPPROTO_TCP;
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if (portspec == NULL)
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portspec = "2049";
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} else if (strcmp(opt, "port") == 0) {
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pass_flag_to_nmount=0;
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asprintf(&tmp, "%d", atoi(val));
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if (tmp == NULL)
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err(1, "asprintf");
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portspec = tmp;
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} else if (strcmp(opt, "principal") == 0) {
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got_principal = 1;
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} else if (strcmp(opt, "proto") == 0) {
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pass_flag_to_nmount=0;
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if (strcmp(val, "tcp") == 0) {
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nfsproto = IPPROTO_TCP;
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opflags |= OF_NOINET6;
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build_iovec(&iov, &iovlen,
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"tcp", NULL, 0);
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} else if (strcmp(val, "udp") == 0) {
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mnttcp_ok = 0;
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nfsproto = IPPROTO_UDP;
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opflags |= OF_NOINET6;
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build_iovec(&iov, &iovlen,
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"udp", NULL, 0);
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} else if (strcmp(val, "tcp6") == 0) {
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nfsproto = IPPROTO_TCP;
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opflags |= OF_NOINET4;
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build_iovec(&iov, &iovlen,
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"tcp", NULL, 0);
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} else if (strcmp(val, "udp6") == 0) {
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mnttcp_ok = 0;
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nfsproto = IPPROTO_UDP;
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opflags |= OF_NOINET4;
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build_iovec(&iov, &iovlen,
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"udp", NULL, 0);
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} else {
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errx(1,
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"illegal proto value -- %s",
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val);
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}
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} else if (strcmp(opt, "sec") == 0) {
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/*
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* Don't add this option to
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* the iovec yet - we will
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* negotiate which sec flavor
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* to use with the remote
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* mountd.
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*/
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pass_flag_to_nmount=0;
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secflavor = sec_name_to_num(val);
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if (secflavor < 0) {
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errx(1,
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"illegal sec value -- %s",
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val);
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}
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} else if (strcmp(opt, "retrycnt") == 0) {
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pass_flag_to_nmount=0;
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num = strtol(val, &p, 10);
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if (*p || num < 0)
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errx(1, "illegal retrycnt value -- %s", val);
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retrycnt = num;
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} else if (strcmp(opt, "maxgroups") == 0) {
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num = strtol(val, &p, 10);
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if (*p || num <= 0)
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errx(1, "illegal maxgroups value -- %s", val);
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//set_rpc_maxgrouplist(num);
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} else if (strcmp(opt, "vers") == 0) {
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num = strtol(val, &p, 10);
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if (*p || num <= 0)
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errx(1, "illegal vers value -- "
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"%s", val);
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switch (num) {
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case 2:
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mountmode = V2;
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break;
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case 3:
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mountmode = V3;
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build_iovec(&iov, &iovlen,
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"nfsv3", NULL, 0);
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break;
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case 4:
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mountmode = V4;
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nfsproto = IPPROTO_TCP;
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if (portspec == NULL)
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portspec = "2049";
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break;
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default:
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errx(1, "illegal nfs version "
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"value -- %s", val);
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}
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pass_flag_to_nmount=0;
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} else if (strcmp(opt, "soft") == 0) {
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softintr = true;
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} else if (strcmp(opt, "intr") == 0) {
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softintr = true;
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}
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if (pass_flag_to_nmount) {
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build_iovec(&iov, &iovlen, opt,
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__DECONST(void *, val),
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strlen(val) + 1);
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}
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opt = pnextopt;
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}
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}
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break;
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case 'P':
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/* obsolete for -o noresvport now default */
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printf("-P deprecated, use -o noresvport\n");
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build_iovec(&iov, &iovlen, "noresvport", NULL, 0);
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break;
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case 'R':
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printf("-R deprecated, use -o retrycnt=<retrycnt>\n");
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num = strtol(optarg, &p, 10);
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if (*p || num < 0)
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errx(1, "illegal -R value -- %s", optarg);
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retrycnt = num;
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break;
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case 'r':
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printf("-r deprecated, use -o rsize=<rsize>\n");
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build_iovec(&iov, &iovlen, "rsize", optarg, (size_t)-1);
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break;
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case 's':
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printf("-s deprecated, use -o soft\n");
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build_iovec(&iov, &iovlen, "soft", NULL, 0);
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softintr = true;
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break;
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case 'T':
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nfsproto = IPPROTO_TCP;
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printf("-T deprecated, use -o tcp\n");
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break;
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case 't':
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printf("-t deprecated, use -o timeout=<value>\n");
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build_iovec(&iov, &iovlen, "timeout", optarg, (size_t)-1);
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break;
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case 'w':
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printf("-w deprecated, use -o wsize=<value>\n");
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build_iovec(&iov, &iovlen, "wsize", optarg, (size_t)-1);
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break;
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case 'x':
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printf("-x deprecated, use -o retrans=<value>\n");
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build_iovec(&iov, &iovlen, "retrans", optarg, (size_t)-1);
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break;
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case 'U':
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printf("-U deprecated, use -o mntudp\n");
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mnttcp_ok = 0;
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nfsproto = IPPROTO_UDP;
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build_iovec(&iov, &iovlen, "mntudp", NULL, 0);
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break;
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|
default:
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usage();
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break;
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|
}
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|
argc -= optind;
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argv += optind;
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if ((opflags & (BGRND | BGRNDNOW)) == (BGRND | BGRNDNOW))
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|
errx(1, "Options bg and bgnow are mutually exclusive");
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|
|
if (argc != 2) {
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|
usage();
|
|
/* NOTREACHED */
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|
}
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|
|
/* Warn that NFSv4 mounts only work correctly as hard mounts. */
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|
if (mountmode == V4 && softintr)
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|
warnx("Warning, options soft and/or intr cannot be safely used"
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|
" for NFSv4. See the BUGS section of mount_nfs(8)");
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|
spec = *argv++;
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mntname = *argv;
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|
|
if (retrycnt == -1)
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/* The default is to keep retrying forever. */
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retrycnt = 0;
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|
|
if (modfind("nfscl") < 0) {
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|
/* Not present in kernel, try loading it */
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|
if (kldload("nfscl") < 0 ||
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modfind("nfscl") < 0)
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|
errx(1, "nfscl is not available");
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|
}
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/*
|
|
* Add the fqdn to the gssname, as required.
|
|
*/
|
|
if (gssname != NULL) {
|
|
if (strchr(gssname, '@') == NULL &&
|
|
gethostname(hostname, MAXHOSTNAMELEN) == 0) {
|
|
snprintf(gssn, sizeof (gssn), "%s@%s", gssname,
|
|
hostname);
|
|
gssname = gssn;
|
|
}
|
|
build_iovec(&iov, &iovlen, "gssname",
|
|
__DECONST(void *, gssname), strlen(gssname) + 1);
|
|
}
|
|
|
|
if (!getnfsargs(&spec, &host, &iov, &iovlen))
|
|
exit(1);
|
|
|
|
/* resolve the mountpoint with realpath(3) */
|
|
if (checkpath(mntname, mntpath) != 0)
|
|
err(1, "%s", mntpath);
|
|
|
|
build_iovec_argf(&iov, &iovlen, "fstype", "nfs");
|
|
build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
|
|
build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
|
|
|
|
if (nmount(iov, iovlen, 0)) {
|
|
nmount_errstr = nfsv4_geterrstr(errno);
|
|
if (mountmode == V4 && nmount_errstr != NULL)
|
|
errx(1, "nmount: %s, %s", mntpath, nmount_errstr);
|
|
else
|
|
err(1, "nmount: %s%s%s", mntpath, errmsg[0] ? ", " : "",
|
|
errmsg);
|
|
} else if (mountmode != V4 && !add_mtab(host, spec)) {
|
|
/* Add mounted file system to PATH_MOUNTTAB */
|
|
warnx("can't update %s for %s:%s", PATH_MOUNTTAB, host, spec);
|
|
}
|
|
|
|
exit(0);
|
|
}
|
|
|
|
static int
|
|
sec_name_to_num(const char *sec)
|
|
{
|
|
if (!strcmp(sec, "krb5"))
|
|
return (RPCSEC_GSS_KRB5);
|
|
if (!strcmp(sec, "krb5i"))
|
|
return (RPCSEC_GSS_KRB5I);
|
|
if (!strcmp(sec, "krb5p"))
|
|
return (RPCSEC_GSS_KRB5P);
|
|
if (!strcmp(sec, "sys"))
|
|
return (AUTH_SYS);
|
|
return (-1);
|
|
}
|
|
|
|
static const char *
|
|
sec_num_to_name(int flavor)
|
|
{
|
|
switch (flavor) {
|
|
case RPCSEC_GSS_KRB5:
|
|
return ("krb5");
|
|
case RPCSEC_GSS_KRB5I:
|
|
return ("krb5i");
|
|
case RPCSEC_GSS_KRB5P:
|
|
return ("krb5p");
|
|
case AUTH_SYS:
|
|
return ("sys");
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Wait for RTM_IFINFO message with interface that is IFF_UP and with
|
|
* link on, or until timeout expires. Returns seconds left.
|
|
*/
|
|
static time_t
|
|
rtm_ifinfo_sleep(time_t sec)
|
|
{
|
|
char buf[2048] __aligned(__alignof(struct if_msghdr));
|
|
fd_set rfds;
|
|
struct timeval tv, start;
|
|
ssize_t nread;
|
|
int n, s;
|
|
|
|
s = socket(PF_ROUTE, SOCK_RAW, 0);
|
|
if (s < 0)
|
|
err(EX_OSERR, "socket");
|
|
(void)gettimeofday(&start, NULL);
|
|
|
|
for (tv.tv_sec = sec, tv.tv_usec = 0;
|
|
tv.tv_sec > 0;
|
|
(void)gettimeofday(&tv, NULL),
|
|
tv.tv_sec = sec - (tv.tv_sec - start.tv_sec)) {
|
|
FD_ZERO(&rfds);
|
|
FD_SET(s, &rfds);
|
|
n = select(s + 1, &rfds, NULL, NULL, &tv);
|
|
if (n == 0)
|
|
continue;
|
|
if (n == -1) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
else
|
|
err(EX_SOFTWARE, "select");
|
|
}
|
|
nread = read(s, buf, 2048);
|
|
if (nread < 0)
|
|
err(EX_OSERR, "read");
|
|
if ((size_t)nread >= sizeof(struct if_msghdr)) {
|
|
struct if_msghdr *ifm;
|
|
|
|
ifm = (struct if_msghdr *)buf;
|
|
if (ifm->ifm_version == RTM_VERSION &&
|
|
ifm->ifm_type == RTM_IFINFO &&
|
|
(ifm->ifm_flags & IFF_UP) &&
|
|
ifm->ifm_data.ifi_link_state != LINK_STATE_DOWN)
|
|
break;
|
|
}
|
|
}
|
|
|
|
close(s);
|
|
|
|
return (tv.tv_sec);
|
|
}
|
|
|
|
static int
|
|
getnfsargs(char **specp, char **hostpp, struct iovec **iov, int *iovlen)
|
|
{
|
|
struct addrinfo hints, *ai_nfs, *ai;
|
|
enum tryret ret;
|
|
int ecode, speclen, remoteerr, offset, have_bracket = 0;
|
|
char *hostp, *delimp, *errstr, *spec;
|
|
size_t len;
|
|
static char nam[MNAMELEN + 1], pname[MAXHOSTNAMELEN + 5];
|
|
|
|
spec = *specp;
|
|
if (*spec == '[' && (delimp = strchr(spec + 1, ']')) != NULL &&
|
|
*(delimp + 1) == ':') {
|
|
hostp = spec + 1;
|
|
spec = delimp + 2;
|
|
have_bracket = 1;
|
|
} else if ((delimp = strrchr(spec, ':')) != NULL) {
|
|
hostp = spec;
|
|
spec = delimp + 1;
|
|
} else if ((delimp = strrchr(spec, '@')) != NULL) {
|
|
warnx("path@server syntax is deprecated, use server:path");
|
|
hostp = delimp + 1;
|
|
} else {
|
|
warnx("no <host>:<dirpath> nfs-name");
|
|
return (0);
|
|
}
|
|
*delimp = '\0';
|
|
|
|
/*
|
|
* If there has been a trailing slash at mounttime it seems
|
|
* that some mountd implementations fail to remove the mount
|
|
* entries from their mountlist while unmounting.
|
|
*/
|
|
for (speclen = strlen(spec);
|
|
speclen > 1 && spec[speclen - 1] == '/';
|
|
speclen--)
|
|
spec[speclen - 1] = '\0';
|
|
if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) {
|
|
warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG));
|
|
return (0);
|
|
}
|
|
/* Make both '@' and ':' notations equal */
|
|
if (*hostp != '\0') {
|
|
len = strlen(hostp);
|
|
offset = 0;
|
|
if (have_bracket)
|
|
nam[offset++] = '[';
|
|
memmove(nam + offset, hostp, len);
|
|
if (have_bracket)
|
|
nam[len + offset++] = ']';
|
|
nam[len + offset++] = ':';
|
|
memmove(nam + len + offset, spec, speclen);
|
|
nam[len + speclen + offset] = '\0';
|
|
}
|
|
|
|
/*
|
|
* Handle an internet host address.
|
|
*/
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
if (nfsproto == IPPROTO_TCP)
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
else if (nfsproto == IPPROTO_UDP)
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
|
|
if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) != 0) {
|
|
hints.ai_flags = AI_CANONNAME;
|
|
if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs))
|
|
!= 0) {
|
|
if (portspec == NULL)
|
|
errx(1, "%s: %s", hostp, gai_strerror(ecode));
|
|
else
|
|
errx(1, "%s:%s: %s", hostp, portspec,
|
|
gai_strerror(ecode));
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* For a Kerberized nfs mount where the "principal"
|
|
* argument has not been set, add it here.
|
|
*/
|
|
if (got_principal == 0 && secflavor != AUTH_SYS &&
|
|
ai_nfs->ai_canonname != NULL) {
|
|
snprintf(pname, sizeof (pname), "nfs@%s",
|
|
ai_nfs->ai_canonname);
|
|
build_iovec(iov, iovlen, "principal", pname,
|
|
strlen(pname) + 1);
|
|
}
|
|
}
|
|
|
|
if ((opflags & (BGRNDNOW | ISBGRND)) == BGRNDNOW) {
|
|
warnx("Mount %s:%s, backgrounding",
|
|
hostp, spec);
|
|
opflags |= ISBGRND;
|
|
if (daemon(0, 0) != 0)
|
|
err(1, "daemon");
|
|
}
|
|
|
|
ret = TRYRET_LOCALERR;
|
|
for (;;) {
|
|
/*
|
|
* Try each entry returned by getaddrinfo(). Note the
|
|
* occurrence of remote errors by setting `remoteerr'.
|
|
*/
|
|
remoteerr = 0;
|
|
for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) {
|
|
if ((ai->ai_family == AF_INET6) &&
|
|
(opflags & OF_NOINET6))
|
|
continue;
|
|
if ((ai->ai_family == AF_INET) &&
|
|
(opflags & OF_NOINET4))
|
|
continue;
|
|
ret = nfs_tryproto(ai, hostp, spec, &errstr, iov,
|
|
iovlen);
|
|
if (ret == TRYRET_SUCCESS)
|
|
break;
|
|
if (ret != TRYRET_LOCALERR)
|
|
remoteerr = 1;
|
|
if ((opflags & ISBGRND) == 0)
|
|
fprintf(stderr, "%s\n", errstr);
|
|
}
|
|
if (ret == TRYRET_SUCCESS)
|
|
break;
|
|
|
|
/* Exit if all errors were local. */
|
|
if (!remoteerr)
|
|
exit(1);
|
|
|
|
/*
|
|
* If retrycnt == 0, we are to keep retrying forever.
|
|
* Otherwise decrement it, and exit if it hits zero.
|
|
*/
|
|
if (retrycnt != 0 && --retrycnt == 0)
|
|
exit(1);
|
|
|
|
if ((opflags & (BGRND | ISBGRND)) == BGRND) {
|
|
warnx("Cannot immediately mount %s:%s, backgrounding",
|
|
hostp, spec);
|
|
opflags |= ISBGRND;
|
|
if (daemon(0, 0) != 0)
|
|
err(1, "daemon");
|
|
}
|
|
/*
|
|
* If rtm_ifinfo_sleep() returns non-zero, don't count
|
|
* that as a retry attempt.
|
|
*/
|
|
if (rtm_ifinfo_sleep(60) && retrycnt != 0)
|
|
retrycnt++;
|
|
}
|
|
freeaddrinfo(ai_nfs);
|
|
|
|
build_iovec(iov, iovlen, "hostname", nam, (size_t)-1);
|
|
|
|
*specp = spec;
|
|
*hostpp = hostp;
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Try to set up the NFS arguments according to the address
|
|
* family, protocol (and possibly port) specified in `ai'.
|
|
*
|
|
* Returns TRYRET_SUCCESS if successful, or:
|
|
* TRYRET_TIMEOUT The server did not respond.
|
|
* TRYRET_REMOTEERR The server reported an error.
|
|
* TRYRET_LOCALERR Local failure.
|
|
*
|
|
* In all error cases, *errstr will be set to a statically-allocated string
|
|
* describing the error.
|
|
*/
|
|
static enum tryret
|
|
nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec, char **errstr,
|
|
struct iovec **iov, int *iovlen)
|
|
{
|
|
static char errbuf[256];
|
|
struct sockaddr_storage nfs_ss;
|
|
struct netbuf nfs_nb;
|
|
struct nfhret nfhret;
|
|
struct timeval try;
|
|
struct rpc_err rpcerr;
|
|
CLIENT *clp;
|
|
struct netconfig *nconf, *nconf_mnt;
|
|
const char *netid, *netid_mnt, *secname;
|
|
int doconnect, nfsvers, mntvers, sotype;
|
|
enum clnt_stat clntstat;
|
|
enum mountmode trymntmode;
|
|
|
|
sotype = 0;
|
|
trymntmode = mountmode;
|
|
errbuf[0] = '\0';
|
|
*errstr = errbuf;
|
|
|
|
if (nfsproto == IPPROTO_TCP)
|
|
sotype = SOCK_STREAM;
|
|
else if (nfsproto == IPPROTO_UDP)
|
|
sotype = SOCK_DGRAM;
|
|
|
|
if ((netid = netidbytype(ai->ai_family, sotype)) == NULL) {
|
|
snprintf(errbuf, sizeof errbuf,
|
|
"af %d sotype %d not supported", ai->ai_family, sotype);
|
|
return (TRYRET_LOCALERR);
|
|
}
|
|
if ((nconf = getnetconf_cached(netid)) == NULL) {
|
|
snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror());
|
|
return (TRYRET_LOCALERR);
|
|
}
|
|
/* The RPCPROG_MNT netid may be different. */
|
|
if (mnttcp_ok) {
|
|
netid_mnt = netid;
|
|
nconf_mnt = nconf;
|
|
} else {
|
|
if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM))
|
|
== NULL) {
|
|
snprintf(errbuf, sizeof errbuf,
|
|
"af %d sotype SOCK_DGRAM not supported",
|
|
ai->ai_family);
|
|
return (TRYRET_LOCALERR);
|
|
}
|
|
if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) {
|
|
snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt,
|
|
nc_sperror());
|
|
return (TRYRET_LOCALERR);
|
|
}
|
|
}
|
|
|
|
tryagain:
|
|
if (trymntmode == V4) {
|
|
nfsvers = 4;
|
|
mntvers = 3; /* Workaround for GCC. */
|
|
} else if (trymntmode == V2) {
|
|
nfsvers = 2;
|
|
mntvers = 1;
|
|
} else {
|
|
nfsvers = 3;
|
|
mntvers = 3;
|
|
}
|
|
|
|
if (portspec != NULL) {
|
|
/* `ai' contains the complete nfsd sockaddr. */
|
|
nfs_nb.buf = ai->ai_addr;
|
|
nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen;
|
|
} else {
|
|
/* Ask the remote rpcbind. */
|
|
nfs_nb.buf = &nfs_ss;
|
|
nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss;
|
|
|
|
if (!rpcb_getaddr(NFS_PROGRAM, nfsvers, nconf, &nfs_nb,
|
|
hostp)) {
|
|
if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH &&
|
|
trymntmode == ANY) {
|
|
trymntmode = V2;
|
|
goto tryagain;
|
|
}
|
|
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s",
|
|
netid, hostp, spec,
|
|
clnt_spcreateerror("RPCPROG_NFS"));
|
|
return (returncode(rpc_createerr.cf_stat,
|
|
&rpc_createerr.cf_error));
|
|
}
|
|
}
|
|
|
|
/* Check that the server (nfsd) responds on the port we have chosen. */
|
|
clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, NFS_PROGRAM, nfsvers,
|
|
0, 0);
|
|
if (clp == NULL) {
|
|
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
|
|
hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS"));
|
|
return (returncode(rpc_createerr.cf_stat,
|
|
&rpc_createerr.cf_error));
|
|
}
|
|
if (sotype == SOCK_DGRAM && noconn == 0) {
|
|
/*
|
|
* Use connect(), to match what the kernel does. This
|
|
* catches cases where the server responds from the
|
|
* wrong source address.
|
|
*/
|
|
doconnect = 1;
|
|
if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) {
|
|
clnt_destroy(clp);
|
|
snprintf(errbuf, sizeof errbuf,
|
|
"[%s] %s:%s: CLSET_CONNECT failed", netid, hostp,
|
|
spec);
|
|
return (TRYRET_LOCALERR);
|
|
}
|
|
}
|
|
|
|
try.tv_sec = 10;
|
|
try.tv_usec = 0;
|
|
clntstat = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL,
|
|
(xdrproc_t)xdr_void, NULL, try);
|
|
if (clntstat != RPC_SUCCESS) {
|
|
if (clntstat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
|
|
clnt_destroy(clp);
|
|
trymntmode = V2;
|
|
goto tryagain;
|
|
}
|
|
clnt_geterr(clp, &rpcerr);
|
|
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
|
|
hostp, spec, clnt_sperror(clp, "NFSPROC_NULL"));
|
|
clnt_destroy(clp);
|
|
return (returncode(clntstat, &rpcerr));
|
|
}
|
|
clnt_destroy(clp);
|
|
|
|
/*
|
|
* For NFSv4, there is no mount protocol.
|
|
*/
|
|
if (trymntmode == V4) {
|
|
/*
|
|
* Store the server address in nfsargsp, making
|
|
* sure to copy any locally allocated structures.
|
|
*/
|
|
addrlen = nfs_nb.len;
|
|
addr = malloc(addrlen);
|
|
if (addr == NULL)
|
|
err(1, "malloc");
|
|
bcopy(nfs_nb.buf, addr, addrlen);
|
|
|
|
build_iovec(iov, iovlen, "addr", addr, addrlen);
|
|
secname = sec_num_to_name(secflavor);
|
|
if (secname != NULL) {
|
|
build_iovec(iov, iovlen, "sec",
|
|
__DECONST(void *, secname), (size_t)-1);
|
|
}
|
|
build_iovec(iov, iovlen, "nfsv4", NULL, 0);
|
|
build_iovec(iov, iovlen, "dirpath", spec, (size_t)-1);
|
|
|
|
return (TRYRET_SUCCESS);
|
|
}
|
|
|
|
/* Send the MOUNTPROC_MNT RPC to get the root filehandle. */
|
|
try.tv_sec = 10;
|
|
try.tv_usec = 0;
|
|
clp = clnt_tp_create(hostp, MOUNTPROG, mntvers, nconf_mnt);
|
|
if (clp == NULL) {
|
|
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
|
|
hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create"));
|
|
return (returncode(rpc_createerr.cf_stat,
|
|
&rpc_createerr.cf_error));
|
|
}
|
|
clp->cl_auth = authsys_create_default();
|
|
nfhret.auth = secflavor;
|
|
nfhret.vers = mntvers;
|
|
clntstat = clnt_call(clp, MOUNTPROC_MNT, (xdrproc_t)xdr_dir, spec,
|
|
(xdrproc_t)xdr_fh, &nfhret,
|
|
try);
|
|
auth_destroy(clp->cl_auth);
|
|
if (clntstat != RPC_SUCCESS) {
|
|
if (clntstat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
|
|
clnt_destroy(clp);
|
|
trymntmode = V2;
|
|
goto tryagain;
|
|
}
|
|
clnt_geterr(clp, &rpcerr);
|
|
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
|
|
hostp, spec, clnt_sperror(clp, "RPCPROG_MNT"));
|
|
clnt_destroy(clp);
|
|
return (returncode(clntstat, &rpcerr));
|
|
}
|
|
clnt_destroy(clp);
|
|
|
|
if (nfhret.stat != 0) {
|
|
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
|
|
hostp, spec, strerror(nfhret.stat));
|
|
return (TRYRET_REMOTEERR);
|
|
}
|
|
|
|
/*
|
|
* Store the filehandle and server address in nfsargsp, making
|
|
* sure to copy any locally allocated structures.
|
|
*/
|
|
addrlen = nfs_nb.len;
|
|
addr = malloc(addrlen);
|
|
fhsize = nfhret.fhsize;
|
|
fh = malloc(fhsize);
|
|
if (addr == NULL || fh == NULL)
|
|
err(1, "malloc");
|
|
bcopy(nfs_nb.buf, addr, addrlen);
|
|
bcopy(nfhret.nfh, fh, fhsize);
|
|
|
|
build_iovec(iov, iovlen, "addr", addr, addrlen);
|
|
build_iovec(iov, iovlen, "fh", fh, fhsize);
|
|
secname = sec_num_to_name(nfhret.auth);
|
|
if (secname) {
|
|
build_iovec(iov, iovlen, "sec",
|
|
__DECONST(void *, secname), (size_t)-1);
|
|
}
|
|
if (nfsvers == 3)
|
|
build_iovec(iov, iovlen, "nfsv3", NULL, 0);
|
|
|
|
return (TRYRET_SUCCESS);
|
|
}
|
|
|
|
/*
|
|
* Catagorise a RPC return status and error into an `enum tryret'
|
|
* return code.
|
|
*/
|
|
static enum tryret
|
|
returncode(enum clnt_stat clntstat, struct rpc_err *rpcerr)
|
|
{
|
|
|
|
switch (clntstat) {
|
|
case RPC_TIMEDOUT:
|
|
return (TRYRET_TIMEOUT);
|
|
case RPC_PMAPFAILURE:
|
|
case RPC_PROGNOTREGISTERED:
|
|
case RPC_PROGVERSMISMATCH:
|
|
/* XXX, these can be local or remote. */
|
|
case RPC_CANTSEND:
|
|
case RPC_CANTRECV:
|
|
return (TRYRET_REMOTEERR);
|
|
case RPC_SYSTEMERROR:
|
|
switch (rpcerr->re_errno) {
|
|
case ETIMEDOUT:
|
|
return (TRYRET_TIMEOUT);
|
|
case ENOMEM:
|
|
break;
|
|
default:
|
|
return (TRYRET_REMOTEERR);
|
|
}
|
|
/* FALLTHROUGH */
|
|
default:
|
|
break;
|
|
}
|
|
return (TRYRET_LOCALERR);
|
|
}
|
|
|
|
/*
|
|
* Look up a netid based on an address family and socket type.
|
|
* `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM.
|
|
*
|
|
* XXX there should be a library function for this.
|
|
*/
|
|
static const char *
|
|
netidbytype(int af, int sotype)
|
|
{
|
|
struct nc_protos *p;
|
|
|
|
for (p = nc_protos; p->netid != NULL; p++) {
|
|
if (af != p->af || sotype != p->sotype)
|
|
continue;
|
|
return (p->netid);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Look up a netconfig entry based on a netid, and cache the result so
|
|
* that we don't need to remember to call freenetconfigent().
|
|
*
|
|
* Otherwise it behaves just like getnetconfigent(), so nc_*error()
|
|
* work on failure.
|
|
*/
|
|
static struct netconfig *
|
|
getnetconf_cached(const char *netid)
|
|
{
|
|
static struct nc_entry {
|
|
struct netconfig *nconf;
|
|
struct nc_entry *next;
|
|
} *head;
|
|
struct nc_entry *p;
|
|
struct netconfig *nconf;
|
|
|
|
for (p = head; p != NULL; p = p->next)
|
|
if (strcmp(netid, p->nconf->nc_netid) == 0)
|
|
return (p->nconf);
|
|
|
|
if ((nconf = getnetconfigent(netid)) == NULL)
|
|
return (NULL);
|
|
if ((p = malloc(sizeof(*p))) == NULL)
|
|
err(1, "malloc");
|
|
p->nconf = nconf;
|
|
p->next = head;
|
|
head = p;
|
|
|
|
return (p->nconf);
|
|
}
|
|
|
|
/*
|
|
* xdr routines for mount rpc's
|
|
*/
|
|
static int
|
|
xdr_dir(XDR *xdrsp, char *dirp)
|
|
{
|
|
return (xdr_string(xdrsp, &dirp, MNTPATHLEN));
|
|
}
|
|
|
|
static 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 = NFS_FHSIZE;
|
|
return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFS_FHSIZE));
|
|
case 3:
|
|
if (!xdr_long(xdrsp, &np->fhsize))
|
|
return (0);
|
|
if (np->fhsize <= 0 || np->fhsize > NFS3_FHSIZE)
|
|
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 (np->auth == -1) {
|
|
np->auth = auth;
|
|
authfnd++;
|
|
} else if (auth == np->auth) {
|
|
authfnd++;
|
|
}
|
|
}
|
|
/*
|
|
* Some servers, such as DEC's OSF/1 return a nil authenticator
|
|
* list to indicate RPCAUTH_UNIX.
|
|
*/
|
|
if (authcnt == 0 && np->auth == -1)
|
|
np->auth = AUTH_SYS;
|
|
if (!authfnd && (authcnt > 0 || np->auth != AUTH_SYS))
|
|
np->stat = EAUTH;
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
|
|
"usage: mount_nfs [-23bcdiLlNPsTU] [-a maxreadahead] [-D deadthresh]",
|
|
" [-g maxgroups] [-I readdirsize] [-o options] [-R retrycnt]",
|
|
" [-r readsize] [-t timeout] [-w writesize] [-x retrans]",
|
|
" rhost:path node");
|
|
exit(1);
|
|
}
|