2 * nfsmount.c -- Linux NFS mount
3 * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
16 * numbers to be specified on the command line.
18 * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
19 * Omit the call to connect() for Linux version 1.3.11 or later.
21 * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
22 * Implemented the "bg", "fg" and "retry" mount options for NFS.
24 * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
25 * - added Native Language Support
27 * Modified by Olaf Kirch and Trond Myklebust for new NFS code,
30 * 2006-06-06 Amit Gud <agud@redhat.com>
31 * - Moved with modifcations to nfs-utils/utils/mount from util-linux/mount.
35 * nfsmount.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp
47 #include <rpc/pmap_prot.h>
48 #include <rpc/pmap_clnt.h>
49 #include <sys/socket.h>
52 #include <netinet/in.h>
53 #include <arpa/inet.h>
55 #include <sys/mount.h>
61 #include "nfs_mount.h"
62 #include "mount_constants.h"
74 #ifndef HAVE_INET_ATON
75 #define inet_aton(a,b) (0)
78 typedef dirpath mnt2arg_t;
79 typedef dirpath mnt3arg_t;
80 typedef dirpath mntarg_t;
82 typedef struct fhstatus mnt2res_t;
83 typedef struct mountres3 mnt3res_t;
89 extern int nfs_mount_data_version;
90 extern char *progname;
94 extern int linux_version_code(void);
96 static inline enum clnt_stat
97 nfs3_mount(CLIENT *clnt, mnt3arg_t *mnt3arg, mnt3res_t *mnt3res)
99 return clnt_call(clnt, MOUNTPROC3_MNT,
100 (xdrproc_t) xdr_dirpath, (caddr_t) mnt3arg,
101 (xdrproc_t) xdr_mountres3, (caddr_t) mnt3res,
105 static inline enum clnt_stat
106 nfs2_mount(CLIENT *clnt, mnt2arg_t *mnt2arg, mnt2res_t *mnt2res)
108 return clnt_call(clnt, MOUNTPROC_MNT,
109 (xdrproc_t) xdr_dirpath, (caddr_t) mnt2arg,
110 (xdrproc_t) xdr_fhstatus, (caddr_t) mnt2res,
115 nfs_call_mount(clnt_addr_t *mnt_server, clnt_addr_t *nfs_server,
116 mntarg_t *mntarg, mntres_t *mntres)
122 if (!probe_bothports(mnt_server, nfs_server))
125 clnt = mnt_openclnt(mnt_server, &msock);
128 /* make pointers in xdr_mountres3 NULL so
129 * that xdr_array allocates memory for us
131 memset(mntres, 0, sizeof(*mntres));
132 switch (mnt_server->pmap.pm_vers) {
134 stat = nfs3_mount(clnt, mntarg, &mntres->nfsv3);
138 stat = nfs2_mount(clnt, mntarg, &mntres->nfsv2);
143 if (stat != RPC_SUCCESS) {
144 clnt_geterr(clnt, &rpc_createerr.cf_error);
145 rpc_createerr.cf_stat = stat;
147 mnt_closeclnt(clnt, msock);
148 if (stat == RPC_SUCCESS)
155 parse_options(char *old_opts, struct nfs_mount_data *data,
156 int *bg, int *retry, clnt_addr_t *mnt_server,
157 clnt_addr_t *nfs_server, char *new_opts, const int opt_size)
159 struct sockaddr_in *mnt_saddr = &mnt_server->saddr;
160 struct pmap *mnt_pmap = &mnt_server->pmap;
161 struct pmap *nfs_pmap = &nfs_server->pmap;
163 char *opt, *opteq, *p, *opt_b;
164 char *mounthost = NULL;
171 len = strlen(new_opts);
172 for (p=old_opts, opt_b=NULL; p && *p; p++) {
174 opt_b = p; /* begin of the option item */
176 open_quote ^= 1; /* reverse the status */
178 continue; /* still in a quoted block */
180 *p = '\0'; /* terminate the option item */
181 if (*p == '\0' || *(p+1) == '\0') {
182 opt = opt_b; /* opt is useful now */
186 continue; /* still somewhere in the option item */
188 if (strlen(opt) >= sizeof(cbuf))
190 if ((opteq = strchr(opt, '=')) && isdigit(opteq[1])) {
191 int val = atoi(opteq + 1);
193 if (!strcmp(opt, "rsize"))
195 else if (!strcmp(opt, "wsize"))
197 else if (!strcmp(opt, "timeo"))
199 else if (!strcmp(opt, "retrans"))
201 else if (!strcmp(opt, "acregmin"))
202 data->acregmin = val;
203 else if (!strcmp(opt, "acregmax"))
204 data->acregmax = val;
205 else if (!strcmp(opt, "acdirmin"))
206 data->acdirmin = val;
207 else if (!strcmp(opt, "acdirmax"))
208 data->acdirmax = val;
209 else if (!strcmp(opt, "actimeo")) {
210 data->acregmin = val;
211 data->acregmax = val;
212 data->acdirmin = val;
213 data->acdirmax = val;
215 else if (!strcmp(opt, "retry"))
217 else if (!strcmp(opt, "port"))
218 nfs_pmap->pm_port = val;
219 else if (!strcmp(opt, "mountport"))
220 mnt_pmap->pm_port = val;
221 else if (!strcmp(opt, "mountprog"))
222 mnt_pmap->pm_prog = val;
223 else if (!strcmp(opt, "mountvers"))
224 mnt_pmap->pm_vers = val;
225 else if (!strcmp(opt, "mounthost"))
226 mounthost=xstrndup(opteq+1, strcspn(opteq+1," \t\n\r,"));
227 else if (!strcmp(opt, "nfsprog"))
228 nfs_pmap->pm_prog = val;
229 else if (!strcmp(opt, "nfsvers") ||
230 !strcmp(opt, "vers")) {
231 nfs_pmap->pm_vers = val;
233 #if NFS_MOUNT_VERSION >= 2
234 } else if (!strcmp(opt, "namlen")) {
235 if (nfs_mount_data_version >= 2)
242 } else if (!strcmp(opt, "addr")) {
249 sprintf(cbuf, "%s=%s,", opt, opteq+1);
252 if (!strcmp(opt, "proto")) {
253 if (!strcmp(opteq+1, "udp")) {
254 nfs_pmap->pm_prot = IPPROTO_UDP;
255 mnt_pmap->pm_prot = IPPROTO_UDP;
256 #if NFS_MOUNT_VERSION >= 2
257 data->flags &= ~NFS_MOUNT_TCP;
258 } else if (!strcmp(opteq+1, "tcp") &&
259 nfs_mount_data_version > 2) {
260 nfs_pmap->pm_prot = IPPROTO_TCP;
261 mnt_pmap->pm_prot = IPPROTO_TCP;
262 data->flags |= NFS_MOUNT_TCP;
268 #if NFS_MOUNT_VERSION >= 5
269 } else if (!strcmp(opt, "sec")) {
270 char *secflavor = opteq+1;
272 if (nfs_mount_data_version < 5) {
273 printf(_("Warning: ignoring sec=%s option\n"),
276 } else if (!strcmp(secflavor, "none"))
277 data->pseudoflavor = AUTH_NONE;
278 else if (!strcmp(secflavor, "sys"))
279 data->pseudoflavor = AUTH_SYS;
280 else if (!strcmp(secflavor, "krb5"))
281 data->pseudoflavor = AUTH_GSS_KRB5;
282 else if (!strcmp(secflavor, "krb5i"))
283 data->pseudoflavor = AUTH_GSS_KRB5I;
284 else if (!strcmp(secflavor, "krb5p"))
285 data->pseudoflavor = AUTH_GSS_KRB5P;
286 else if (!strcmp(secflavor, "lipkey"))
287 data->pseudoflavor = AUTH_GSS_LKEY;
288 else if (!strcmp(secflavor, "lipkey-i"))
289 data->pseudoflavor = AUTH_GSS_LKEYI;
290 else if (!strcmp(secflavor, "lipkey-p"))
291 data->pseudoflavor = AUTH_GSS_LKEYP;
292 else if (!strcmp(secflavor, "spkm3"))
293 data->pseudoflavor = AUTH_GSS_SPKM;
294 else if (!strcmp(secflavor, "spkm3i"))
295 data->pseudoflavor = AUTH_GSS_SPKMI;
296 else if (!strcmp(secflavor, "spkm3p"))
297 data->pseudoflavor = AUTH_GSS_SPKMP;
301 printf(_("Warning: Unrecognized security flavor %s.\n"),
305 data->flags |= NFS_MOUNT_SECFLAVOUR;
307 } else if (!strcmp(opt, "mounthost"))
308 mounthost=xstrndup(opteq+1,
309 strcspn(opteq+1," \t\n\r,"));
310 else if (!strcmp(opt, "context")) {
311 char *context = opteq + 1;
312 int ctxlen = strlen(context);
314 if (ctxlen > NFS_MAX_CONTEXT_LEN) {
315 nfs_error(_("context parameter exceeds"
317 NFS_MAX_CONTEXT_LEN);
320 /* The context string is in the format of
321 * "system_u:object_r:...". We only want
322 * the context str between the quotes.
325 strncpy(data->context, context+1,
328 strncpy(data->context, context,
329 NFS_MAX_CONTEXT_LEN);
334 sprintf(cbuf, "%s=%s,", opt, opteq+1);
337 if (!strncmp(opt, "no", 2)) {
341 if (!strcmp(opt, "bg"))
343 else if (!strcmp(opt, "fg"))
345 else if (!strcmp(opt, "soft")) {
346 data->flags &= ~NFS_MOUNT_SOFT;
348 data->flags |= NFS_MOUNT_SOFT;
349 } else if (!strcmp(opt, "hard")) {
350 data->flags &= ~NFS_MOUNT_SOFT;
352 data->flags |= NFS_MOUNT_SOFT;
353 } else if (!strcmp(opt, "intr")) {
354 data->flags &= ~NFS_MOUNT_INTR;
356 data->flags |= NFS_MOUNT_INTR;
357 } else if (!strcmp(opt, "posix")) {
358 data->flags &= ~NFS_MOUNT_POSIX;
360 data->flags |= NFS_MOUNT_POSIX;
361 } else if (!strcmp(opt, "cto")) {
362 data->flags &= ~NFS_MOUNT_NOCTO;
364 data->flags |= NFS_MOUNT_NOCTO;
365 } else if (!strcmp(opt, "ac")) {
366 data->flags &= ~NFS_MOUNT_NOAC;
368 data->flags |= NFS_MOUNT_NOAC;
369 #if NFS_MOUNT_VERSION >= 2
370 } else if (!strcmp(opt, "tcp")) {
371 data->flags &= ~NFS_MOUNT_TCP;
373 if (nfs_mount_data_version < 2)
375 nfs_pmap->pm_prot = IPPROTO_TCP;
376 mnt_pmap->pm_prot = IPPROTO_TCP;
377 data->flags |= NFS_MOUNT_TCP;
379 mnt_pmap->pm_prot = IPPROTO_UDP;
380 nfs_pmap->pm_prot = IPPROTO_UDP;
382 } else if (!strcmp(opt, "udp")) {
383 data->flags &= ~NFS_MOUNT_TCP;
385 if (nfs_mount_data_version < 2)
387 nfs_pmap->pm_prot = IPPROTO_TCP;
388 mnt_pmap->pm_prot = IPPROTO_TCP;
389 data->flags |= NFS_MOUNT_TCP;
391 nfs_pmap->pm_prot = IPPROTO_UDP;
392 mnt_pmap->pm_prot = IPPROTO_UDP;
395 #if NFS_MOUNT_VERSION >= 3
396 } else if (!strcmp(opt, "lock")) {
397 data->flags &= ~NFS_MOUNT_NONLM;
399 if (nfs_mount_data_version < 3)
401 data->flags |= NFS_MOUNT_NONLM;
404 #if NFS_MOUNT_VERSION >= 4
405 } else if (!strcmp(opt, "broken_suid")) {
406 data->flags &= ~NFS_MOUNT_BROKEN_SUID;
408 if (nfs_mount_data_version < 4)
410 data->flags |= NFS_MOUNT_BROKEN_SUID;
412 } else if (!strcmp(opt, "acl")) {
413 data->flags &= ~NFS_MOUNT_NOACL;
415 data->flags |= NFS_MOUNT_NOACL;
416 } else if (!strcmp(opt, "rdirplus")) {
417 data->flags &= ~NFS_MOUNT_NORDIRPLUS;
419 data->flags |= NFS_MOUNT_NORDIRPLUS;
420 } else if (!strcmp(opt, "sharecache")) {
421 data->flags &= ~NFS_MOUNT_UNSHARED;
423 data->flags |= NFS_MOUNT_UNSHARED;
429 nfs_error(_("%s: Unsupported nfs mount option:"
431 val ? "" : "no", opt);
434 sprintf(cbuf, val ? "%s," : "no%s,", opt);
437 if (len >= opt_size) {
438 nfs_error(_("%s: excessively long option argument"),
442 strcat(new_opts, cbuf);
444 /* See if the nfs host = mount host. */
446 if (!nfs_gethostbyname(mounthost, mnt_saddr))
448 *mnt_server->hostname = mounthost;
452 nfs_error(_("%s: Bad nfs mount parameter: %s\n"), progname, opt);
457 static int nfsmnt_check_compat(const struct pmap *nfs_pmap,
458 const struct pmap *mnt_pmap)
460 unsigned int max_nfs_vers = (nfs_mount_data_version >= 4) ? 3 : 2;
461 unsigned int max_mnt_vers = (nfs_mount_data_version >= 4) ? 3 : 2;
463 if (nfs_pmap->pm_vers == 4) {
464 nfs_error(_("%s: Please use '-t nfs4' "
465 "instead of '-o vers=4'"), progname);
469 if (nfs_pmap->pm_vers) {
470 if (nfs_pmap->pm_vers > max_nfs_vers || nfs_pmap->pm_vers < 2) {
471 nfs_error(_("%s: NFS version %ld is not supported"),
472 progname, nfs_pmap->pm_vers);
477 if (mnt_pmap->pm_vers > max_mnt_vers) {
478 nfs_error(_("%s: NFS mount version %ld s not supported"),
479 progname, mnt_pmap->pm_vers);
490 nfsmount(const char *spec, const char *node, int flags,
491 char **extra_opts, int fake, int running_bg)
493 static char *prev_bg_host;
495 char *hostname, *dirname, *old_opts, *mounthost = NULL;
496 char new_opts[1024], cbuf[1024];
497 static struct nfs_mount_data data;
499 static int doonce = 0;
501 clnt_addr_t mnt_server = { &mounthost, };
502 clnt_addr_t nfs_server = { &hostname, };
503 struct sockaddr_in *nfs_saddr = &nfs_server.saddr;
504 struct pmap *mnt_pmap = &mnt_server.pmap,
505 *nfs_pmap = &nfs_server.pmap;
506 struct pmap save_mnt, save_nfs;
515 int retval = EX_FAIL;
520 if (strlen(spec) >= sizeof(hostdir)) {
521 nfs_error(_("%s: excessively long host:dir argument"),
525 strcpy(hostdir, spec);
526 if ((s = strchr(hostdir, ':'))) {
530 /* Ignore all but first hostname in replicated mounts
531 until they can be fully supported. (mack@sgi.com) */
532 if ((s = strchr(hostdir, ','))) {
534 nfs_error(_("%s: warning: "
535 "multiple hostnames not supported"),
539 nfs_error(_("%s: directory to mount not in host:dir format"),
544 if (!nfs_gethostbyname(hostname, nfs_saddr))
546 mounthost = hostname;
547 memcpy (&mnt_server.saddr, nfs_saddr, sizeof (mnt_server.saddr));
549 /* add IP address to mtab options for use when unmounting */
551 s = inet_ntoa(nfs_saddr->sin_addr);
552 old_opts = *extra_opts;
556 /* Set default options.
557 * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
558 * let the kernel decide.
559 * timeo is filled in after we know whether it'll be TCP or UDP. */
560 memset(&data, 0, sizeof(data));
565 #if NFS_MOUNT_VERSION >= 2
566 data.namlen = NAME_MAX;
570 retry = 10000; /* 10000 minutes ~ 1 week */
572 memset(mnt_pmap, 0, sizeof(*mnt_pmap));
573 mnt_pmap->pm_prog = MOUNTPROG;
574 memset(nfs_pmap, 0, sizeof(*nfs_pmap));
575 nfs_pmap->pm_prog = NFS_PROGRAM;
579 if (!parse_options(old_opts, &data, &bg, &retry, &mnt_server, &nfs_server,
580 new_opts, sizeof(new_opts)))
582 if (!nfsmnt_check_compat(nfs_pmap, mnt_pmap))
585 if (retry == 10000 && !bg)
586 retry = 2; /* reset for fg mounts */
588 #ifdef NFS_MOUNT_DEBUG
589 printf(_("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n"),
590 data.rsize, data.wsize, data.timeo, data.retrans);
591 printf(_("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n"),
592 data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
593 printf(_("port = %lu, bg = %d, retry = %d, flags = %.8x\n"),
594 nfs_pmap->pm_port, bg, retry, data.flags);
595 printf(_("mountprog = %lu, mountvers = %lu, nfsprog = %lu, nfsvers = %lu\n"),
596 mnt_pmap->pm_prog, mnt_pmap->pm_vers,
597 nfs_pmap->pm_prog, nfs_pmap->pm_vers);
598 printf(_("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d"),
599 (data.flags & NFS_MOUNT_SOFT) != 0,
600 (data.flags & NFS_MOUNT_INTR) != 0,
601 (data.flags & NFS_MOUNT_POSIX) != 0,
602 (data.flags & NFS_MOUNT_NOCTO) != 0,
603 (data.flags & NFS_MOUNT_NOAC) != 0);
604 #if NFS_MOUNT_VERSION >= 2
605 printf(_(", tcp = %d"),
606 (data.flags & NFS_MOUNT_TCP) != 0);
608 #if NFS_MOUNT_VERSION >= 4
609 printf(_(", noacl = %d"), (data.flags & NFS_MOUNT_NOACL) != 0);
611 #if NFS_MOUNT_VERSION >= 5
612 printf(_(", sec = %u"), data.pseudoflavor);
613 printf(_(", readdirplus = %d"), (data.flags & NFS_MOUNT_NORDIRPLUS) != 0);
618 data.version = nfs_mount_data_version;
620 if (flags & MS_REMOUNT)
624 * If the previous mount operation on the same host was
625 * backgrounded, and the "bg" for this mount is also set,
626 * give up immediately, to avoid the initial timeout.
628 if (bg && !running_bg &&
629 prev_bg_host && strcmp(hostname, prev_bg_host) == 0) {
635 /* create mount deamon client */
638 * The following loop implements the mount retries. On the first
639 * call, "running_bg" is 0. When the mount times out, and the
640 * "bg" option is set, the exit status EX_BG will be returned.
641 * For a backgrounded mount, there will be a second call by the
642 * child process with "running_bg" set to 1.
644 * The case where the mount point is not present and the "bg"
645 * option is set, is treated as a timeout. This is done to
646 * support nested mounts.
648 * The "retry" count specified by the user is the number of
649 * minutes to retry before giving up.
651 * Only the first error message will be displayed.
653 timeout = time(NULL) + 60 * retry;
658 memcpy(&save_nfs, nfs_pmap, sizeof(save_nfs));
659 memcpy(&save_mnt, mnt_pmap, sizeof(save_mnt));
661 if (bg && stat(node, &statbuf) == -1) {
662 /* no mount point yet - sleep */
664 sleep(val); /* 1, 2, 4, 8, 16, 30, ... */
671 /* be careful not to use too many CPU cycles */
675 stat = nfs_call_mount(&mnt_server, &nfs_server,
679 memcpy(nfs_pmap, &save_nfs, sizeof(*nfs_pmap));
680 memcpy(mnt_pmap, &save_mnt, sizeof(*mnt_pmap));
684 switch(rpc_createerr.cf_stat){
687 case RPC_SYSTEMERROR:
688 if (errno == ETIMEDOUT)
691 rpc_mount_errors(*nfs_server.hostname, 0, bg);
696 rpc_mount_errors(*nfs_server.hostname, 0, bg);
699 rpc_mount_errors(*nfs_server.hostname, 1, bg);
703 prev_bg_host = xstrdup(hostname);
710 rpc_mount_errors(*nfs_server.hostname, 0, bg);
714 rpc_mount_errors(*nfs_server.hostname, 1, bg);
717 if (nfs_pmap->pm_vers == 2) {
718 if (mntres.nfsv2.fhs_status != 0) {
719 nfs_error(_("%s: %s:%s failed, reason given by server: %s"),
720 progname, hostname, dirname,
721 nfs_strerror(mntres.nfsv2.fhs_status));
724 memcpy(data.root.data,
725 (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
727 #if NFS_MOUNT_VERSION >= 4
728 data.root.size = NFS_FHSIZE;
729 memcpy(data.old_root.data,
730 (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
734 #if NFS_MOUNT_VERSION >= 4
735 mountres3_ok *mountres;
737 int i, *flavor, yum = 0;
738 if (mntres.nfsv3.fhs_status != 0) {
739 nfs_error(_("%s: %s:%s failed, reason given by server: %s"),
740 progname, hostname, dirname,
741 nfs_strerror(mntres.nfsv3.fhs_status));
744 #if NFS_MOUNT_VERSION >= 5
745 mountres = &mntres.nfsv3.mountres3_u.mountinfo;
746 i = mountres->auth_flavors.auth_flavors_len;
750 flavor = mountres->auth_flavors.auth_flavors_val;
752 /* If no flavour requested, use first simple
753 * flavour that is offered.
755 if (! (data.flags & NFS_MOUNT_SECFLAVOUR) &&
756 (flavor[i] == AUTH_SYS ||
757 flavor[i] == AUTH_NONE)) {
758 data.pseudoflavor = flavor[i];
759 data.flags |= NFS_MOUNT_SECFLAVOUR;
761 if (flavor[i] == data.pseudoflavor)
763 #ifdef NFS_MOUNT_DEBUG
764 printf(_("auth flavor %d: %d\n"), i, flavor[i]);
768 nfs_error(_("%s: %s:%s failed, security flavor "
770 progname, hostname, dirname);
771 /* server has registered us in rmtab, send umount */
772 nfs_call_umount(&mnt_server, &dirname);
777 fhandle = &mntres.nfsv3.mountres3_u.mountinfo.fhandle;
778 memset(data.old_root.data, 0, NFS_FHSIZE);
779 memset(&data.root, 0, sizeof(data.root));
780 data.root.size = fhandle->fhandle3_len;
781 memcpy(data.root.data,
782 (char *) fhandle->fhandle3_val,
783 fhandle->fhandle3_len);
785 data.flags |= NFS_MOUNT_VER3;
789 if (nfs_mount_data_version == 1) {
790 /* create nfs socket for kernel */
791 if (nfs_pmap->pm_prot == IPPROTO_TCP)
792 fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
794 fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
796 perror(_("nfs socket"));
799 if (bindresvport(fsock, 0) < 0) {
800 perror(_("nfs bindresvport"));
805 #ifdef NFS_MOUNT_DEBUG
806 printf(_("using port %lu for nfs deamon\n"), nfs_pmap->pm_port);
808 nfs_saddr->sin_port = htons(nfs_pmap->pm_port);
810 * connect() the socket for kernels 1.3.10 and below only,
811 * to avoid problems with multihomed hosts.
814 if (linux_version_code() <= 0x01030a && fsock != -1
815 && connect(fsock, (struct sockaddr *) nfs_saddr,
816 sizeof (*nfs_saddr)) < 0) {
817 perror(_("nfs connect"));
821 #if NFS_MOUNT_VERSION >= 2
822 if (nfs_pmap->pm_prot == IPPROTO_TCP)
823 data.flags |= NFS_MOUNT_TCP;
825 data.flags &= ~NFS_MOUNT_TCP;
828 /* prepare data structure for kernel */
831 memcpy((char *) &data.addr, (char *) nfs_saddr, sizeof(data.addr));
832 strncpy(data.hostname, hostname, sizeof(data.hostname));
835 /* Ensure we have enough padding for the following strcat()s */
836 if (strlen(new_opts) + strlen(s) + 30 >= sizeof(new_opts)) {
837 nfs_error(_("%s: excessively long option argument"),
842 snprintf(cbuf, sizeof(cbuf)-1, "addr=%s", s);
843 strcat(new_opts, cbuf);
845 *extra_opts = xstrdup(new_opts);
847 if (!fake && !(data.flags & NFS_MOUNT_NONLM)) {
848 if (!start_statd()) {
849 nfs_error(_("%s: rpc.statd is not running but is "
850 "required for remote locking.\n"
851 " Either use '-o nolocks' to keep "
852 "locks local, or start statd."),
859 if (mount(spec, node, "nfs",
860 flags & ~(MS_USER|MS_USERS), &data)) {
861 mount_error(spec, node, errno);