utils/mount/nfsmount.c

   1 /*
   2  * nfsmount.c -- Linux NFS mount
   3  * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
   4  *
   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)
   8  * any later version.
   9  *
  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.
  14  *
  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.
  17  *
  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.
  20  *
  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.
  23  *
  24  * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
  25  * - added Native Language Support
  26  *
  27  * Modified by Olaf Kirch and Trond Myklebust for new NFS code,
  28  * plus NFSv3 stuff.
  29  *
  30  * 2006-06-06 Amit Gud <agud@redhat.com>
  31  * - Moved with modifcations to nfs-utils/utils/mount from util-linux/mount.
  32  */
  33
  34 /*
  35  * nfsmount.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp
  36  */
  37
  38 #include <ctype.h>
  39 #include <unistd.h>
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <stdlib.h>
  43 #include <errno.h>
  44 #include <netdb.h>
  45 #include <time.h>
  46 #include <rpc/rpc.h>
  47 #include <rpc/pmap_prot.h>
  48 #include <rpc/pmap_clnt.h>
  49 #include <sys/socket.h>
  50 #include <sys/time.h>
  51 #include <sys/stat.h>
  52 #include <netinet/in.h>
  53 #include <arpa/inet.h>
  54 #include <mntent.h>
  55 #include <sys/mount.h>
  56 #include <paths.h>
  57 #include <syslog.h>
  58
  59 #include "conn.h"
  60 #include "xcommon.h"
  61 #include "mount.h"
  62 #include "nfs_mount.h"
  63 #include "mount_constants.h"
  64 #include "nls.h"
  65 #include "error.h"
  66 #include "network.h"
  67
  68 #ifndef NFS_PORT
  69 #define NFS_PORT 2049
  70 #endif
  71 #ifndef NFS_FHSIZE
  72 #define NFS_FHSIZE 32
  73 #endif
  74
  75 #ifndef HAVE_INET_ATON
  76 #define inet_aton(a,b) (0)
  77 #endif
  78
  79 typedef dirpath mnt2arg_t;
  80 typedef dirpath mnt3arg_t;
  81 typedef dirpath mntarg_t;
  82
  83 typedef struct fhstatus  mnt2res_t;
  84 typedef struct mountres3 mnt3res_t;
  85 typedef union {
  86         mnt2res_t nfsv2;
  87         mnt3res_t nfsv3;
  88 } mntres_t;
  89
  90 extern int nfs_mount_data_version;
  91 extern char *progname;
  92 extern int verbose;
  93 extern int sloppy;
  94
  95 extern int linux_version_code(void);
  96
  97 static inline enum clnt_stat
  98 nfs3_mount(CLIENT *clnt, mnt3arg_t *mnt3arg, mnt3res_t *mnt3res)
  99 {
 100         return clnt_call(clnt, MOUNTPROC3_MNT,
 101                          (xdrproc_t) xdr_dirpath, (caddr_t) mnt3arg,
 102                          (xdrproc_t) xdr_mountres3, (caddr_t) mnt3res,
 103                          TIMEOUT);
 104 }
 105
 106 static inline enum clnt_stat
 107 nfs2_mount(CLIENT *clnt, mnt2arg_t *mnt2arg, mnt2res_t *mnt2res)
 108 {
 109         return clnt_call(clnt, MOUNTPROC_MNT,
 110                          (xdrproc_t) xdr_dirpath, (caddr_t) mnt2arg,
 111                          (xdrproc_t) xdr_fhstatus, (caddr_t) mnt2res,
 112                          TIMEOUT);
 113 }
 114
 115 static int
 116 nfs_call_mount(clnt_addr_t *mnt_server, clnt_addr_t *nfs_server,
 117                mntarg_t *mntarg, mntres_t *mntres)
 118 {
 119         CLIENT *clnt;
 120         enum clnt_stat stat;
 121         int msock;
 122
 123         if (!probe_bothports(mnt_server, nfs_server))
 124                 goto out_bad;
 125
 126         clnt = mnt_openclnt(mnt_server, &msock);
 127         if (!clnt)
 128                 goto out_bad;
 129         /* make pointers in xdr_mountres3 NULL so
 130          * that xdr_array allocates memory for us
 131          */
 132         memset(mntres, 0, sizeof(*mntres));
 133         switch (mnt_server->pmap.pm_vers) {
 134         case 3:
 135                 stat = nfs3_mount(clnt, mntarg, &mntres->nfsv3);
 136                 break;
 137         case 2:
 138         case 1:
 139                 stat = nfs2_mount(clnt, mntarg, &mntres->nfsv2);
 140                 break;
 141         default:
 142                 goto out_bad;
 143         }
 144         if (stat != RPC_SUCCESS) {
 145                 clnt_geterr(clnt, &rpc_createerr.cf_error);
 146                 rpc_createerr.cf_stat = stat;
 147         }
 148         mnt_closeclnt(clnt, msock);
 149         if (stat == RPC_SUCCESS)
 150                 return 1;
 151  out_bad:
 152         return 0;
 153 }
 154
 155 static int
 156 parse_options(char *old_opts, struct nfs_mount_data *data,
 157               int *bg, int *retry, clnt_addr_t *mnt_server,
 158               clnt_addr_t *nfs_server, char *new_opts, const int opt_size)
 159 {
 160         struct sockaddr_in *mnt_saddr = &mnt_server->saddr;
 161         struct pmap *mnt_pmap = &mnt_server->pmap;
 162         struct pmap *nfs_pmap = &nfs_server->pmap;
 163         int len;
 164         char *opt, *opteq, *p, *opt_b;
 165         char *mounthost = NULL;
 166         char cbuf[128];
 167         int open_quote = 0;
 168
 169         data->flags = 0;
 170         *bg = 0;
 171
 172         len = strlen(new_opts);
 173         for (p=old_opts, opt_b=NULL; p && *p; p++) {
 174                 if (!opt_b)
 175                         opt_b = p;              /* begin of the option item */
 176                 if (*p == '"')
 177                         open_quote ^= 1;        /* reverse the status */
 178                 if (open_quote)
 179                         continue;               /* still in a quoted block */
 180                 if (*p == ',')
 181                         *p = '\0';              /* terminate the option item */
 182                 if (*p == '\0' || *(p+1) == '\0') {
 183                         opt = opt_b;            /* opt is useful now */
 184                         opt_b = NULL;
 185                 }
 186                 else
 187                         continue;               /* still somewhere in the option item */
 188
 189                 if (strlen(opt) >= sizeof(cbuf))
 190                         goto bad_parameter;
 191                 if ((opteq = strchr(opt, '=')) && isdigit(opteq[1])) {
 192                         int val = atoi(opteq + 1);
 193                         *opteq = '\0';
 194 /* printf("opt=%s\n", opt); */
 195                         if (!strcmp(opt, "rsize"))
 196                                 data->rsize = val;
 197                         else if (!strcmp(opt, "wsize"))
 198                                 data->wsize = val;
 199                         else if (!strcmp(opt, "timeo"))
 200                                 data->timeo = val;
 201                         else if (!strcmp(opt, "retrans"))
 202                                 data->retrans = val;
 203                         else if (!strcmp(opt, "acregmin"))
 204                                 data->acregmin = val;
 205                         else if (!strcmp(opt, "acregmax"))
 206                                 data->acregmax = val;
 207                         else if (!strcmp(opt, "acdirmin"))
 208                                 data->acdirmin = val;
 209                         else if (!strcmp(opt, "acdirmax"))
 210                                 data->acdirmax = val;
 211                         else if (!strcmp(opt, "actimeo")) {
 212                                 data->acregmin = val;
 213                                 data->acregmax = val;
 214                                 data->acdirmin = val;
 215                                 data->acdirmax = val;
 216                         }
 217                         else if (!strcmp(opt, "retry"))
 218                                 *retry = val;
 219                         else if (!strcmp(opt, "port"))
 220                                 nfs_pmap->pm_port = val;
 221                         else if (!strcmp(opt, "mountport"))
 222                                 mnt_pmap->pm_port = val;
 223                         else if (!strcmp(opt, "mountprog"))
 224                                 mnt_pmap->pm_prog = val;
 225                         else if (!strcmp(opt, "mountvers"))
 226                                 mnt_pmap->pm_vers = val;
 227                         else if (!strcmp(opt, "mounthost"))
 228                                 mounthost=xstrndup(opteq+1, strcspn(opteq+1," \t\n\r,"));
 229                         else if (!strcmp(opt, "nfsprog"))
 230                                 nfs_pmap->pm_prog = val;
 231                         else if (!strcmp(opt, "nfsvers") ||
 232                                  !strcmp(opt, "vers")) {
 233                                 nfs_pmap->pm_vers = val;
 234                                 opt = "nfsvers";
 235 #if NFS_MOUNT_VERSION >= 2
 236                         } else if (!strcmp(opt, "namlen")) {
 237                                 if (nfs_mount_data_version >= 2)
 238                                         data->namlen = val;
 239                                 else if (sloppy)
 240                                         continue;
 241                                 else
 242                                         goto bad_parameter;
 243 #endif
 244                         } else if (!strcmp(opt, "addr")) {
 245                                 /* ignore */;
 246                                 continue;
 247                         } else if (sloppy)
 248                                 continue;
 249                         else
 250                                 goto bad_parameter;
 251                         sprintf(cbuf, "%s=%s,", opt, opteq+1);
 252                 } else if (opteq) {
 253                         *opteq = '\0';
 254                         if (!strcmp(opt, "proto")) {
 255                                 if (!strcmp(opteq+1, "udp")) {
 256                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 257                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 258 #if NFS_MOUNT_VERSION >= 2
 259                                         data->flags &= ~NFS_MOUNT_TCP;
 260                                 } else if (!strcmp(opteq+1, "tcp") &&
 261                                            nfs_mount_data_version > 2) {
 262                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 263                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 264                                         data->flags |= NFS_MOUNT_TCP;
 265 #endif
 266                                 } else if (sloppy)
 267                                         continue;
 268                                 else
 269                                         goto bad_parameter;
 270 #if NFS_MOUNT_VERSION >= 5
 271                         } else if (!strcmp(opt, "sec")) {
 272                                 char *secflavor = opteq+1;
 273                                 /* see RFC 2623 */
 274                                 if (nfs_mount_data_version < 5) {
 275                                         printf(_("Warning: ignoring sec=%s option\n"),
 276                                                         secflavor);
 277                                         continue;
 278                                 } else if (!strcmp(secflavor, "none"))
 279                                         data->pseudoflavor = AUTH_NONE;
 280                                 else if (!strcmp(secflavor, "sys"))
 281                                         data->pseudoflavor = AUTH_SYS;
 282                                 else if (!strcmp(secflavor, "krb5"))
 283                                         data->pseudoflavor = AUTH_GSS_KRB5;
 284                                 else if (!strcmp(secflavor, "krb5i"))
 285                                         data->pseudoflavor = AUTH_GSS_KRB5I;
 286                                 else if (!strcmp(secflavor, "krb5p"))
 287                                         data->pseudoflavor = AUTH_GSS_KRB5P;
 288                                 else if (!strcmp(secflavor, "lipkey"))
 289                                         data->pseudoflavor = AUTH_GSS_LKEY;
 290                                 else if (!strcmp(secflavor, "lipkey-i"))
 291                                         data->pseudoflavor = AUTH_GSS_LKEYI;
 292                                 else if (!strcmp(secflavor, "lipkey-p"))
 293                                         data->pseudoflavor = AUTH_GSS_LKEYP;
 294                                 else if (!strcmp(secflavor, "spkm3"))
 295                                         data->pseudoflavor = AUTH_GSS_SPKM;
 296                                 else if (!strcmp(secflavor, "spkm3i"))
 297                                         data->pseudoflavor = AUTH_GSS_SPKMI;
 298                                 else if (!strcmp(secflavor, "spkm3p"))
 299                                         data->pseudoflavor = AUTH_GSS_SPKMP;
 300                                 else if (sloppy)
 301                                         continue;
 302                                 else {
 303                                         printf(_("Warning: Unrecognized security flavor %s.\n"),
 304                                                 secflavor);
 305                                         goto bad_parameter;
 306                                 }
 307                                 data->flags |= NFS_MOUNT_SECFLAVOUR;
 308 #endif
 309                         } else if (!strcmp(opt, "mounthost"))
 310                                 mounthost=xstrndup(opteq+1,
 311                                                    strcspn(opteq+1," \t\n\r,"));
 312                          else if (!strcmp(opt, "context")) {
 313                                 char *context = opteq + 1;
 314                                 int ctxlen = strlen(context);
 315
 316                                 if (ctxlen > NFS_MAX_CONTEXT_LEN) {
 317                                         nfs_error(_("context parameter exceeds"
 318                                                         " limit of %d"),
 319                                                         NFS_MAX_CONTEXT_LEN);
 320                                         goto bad_parameter;
 321                                 }
 322                                 /* The context string is in the format of
 323                                  * "system_u:object_r:...".  We only want
 324                                  * the context str between the quotes.
 325                                  */
 326                                 if (*context == '"')
 327                                         strncpy(data->context, context+1,
 328                                                         ctxlen-2);
 329                                 else
 330                                         strncpy(data->context, context,
 331                                                         NFS_MAX_CONTEXT_LEN);
 332                         } else if (sloppy)
 333                                 continue;
 334                         else
 335                                 goto bad_parameter;
 336                         sprintf(cbuf, "%s=%s,", opt, opteq+1);
 337                 } else {
 338                         int val = 1;
 339                         if (!strncmp(opt, "no", 2)) {
 340                                 val = 0;
 341                                 opt += 2;
 342                         }
 343                         if (!strcmp(opt, "bg"))
 344                                 *bg = val;
 345                         else if (!strcmp(opt, "fg"))
 346                                 *bg = !val;
 347                         else if (!strcmp(opt, "soft")) {
 348                                 data->flags &= ~NFS_MOUNT_SOFT;
 349                                 if (val)
 350                                         data->flags |= NFS_MOUNT_SOFT;
 351                         } else if (!strcmp(opt, "hard")) {
 352                                 data->flags &= ~NFS_MOUNT_SOFT;
 353                                 if (!val)
 354                                         data->flags |= NFS_MOUNT_SOFT;
 355                         } else if (!strcmp(opt, "intr")) {
 356                                 data->flags &= ~NFS_MOUNT_INTR;
 357                                 if (val)
 358                                         data->flags |= NFS_MOUNT_INTR;
 359                         } else if (!strcmp(opt, "posix")) {
 360                                 data->flags &= ~NFS_MOUNT_POSIX;
 361                                 if (val)
 362                                         data->flags |= NFS_MOUNT_POSIX;
 363                         } else if (!strcmp(opt, "cto")) {
 364                                 data->flags &= ~NFS_MOUNT_NOCTO;
 365                                 if (!val)
 366                                         data->flags |= NFS_MOUNT_NOCTO;
 367                         } else if (!strcmp(opt, "ac")) {
 368                                 data->flags &= ~NFS_MOUNT_NOAC;
 369                                 if (!val)
 370                                         data->flags |= NFS_MOUNT_NOAC;
 371 #if NFS_MOUNT_VERSION >= 2
 372                         } else if (!strcmp(opt, "tcp")) {
 373                                 data->flags &= ~NFS_MOUNT_TCP;
 374                                 if (val) {
 375                                         if (nfs_mount_data_version < 2)
 376                                                 goto bad_option;
 377                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 378                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 379                                         data->flags |= NFS_MOUNT_TCP;
 380                                 } else {
 381                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 382                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 383                                 }
 384                         } else if (!strcmp(opt, "udp")) {
 385                                 data->flags &= ~NFS_MOUNT_TCP;
 386                                 if (!val) {
 387                                         if (nfs_mount_data_version < 2)
 388                                                 goto bad_option;
 389                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 390                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 391                                         data->flags |= NFS_MOUNT_TCP;
 392                                 } else {
 393                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 394                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 395                                 }
 396 #endif
 397 #if NFS_MOUNT_VERSION >= 3
 398                         } else if (!strcmp(opt, "lock")) {
 399                                 data->flags &= ~NFS_MOUNT_NONLM;
 400                                 if (!val) {
 401                                         if (nfs_mount_data_version < 3)
 402                                                 goto bad_option;
 403                                         data->flags |= NFS_MOUNT_NONLM;
 404                                 }
 405 #endif
 406 #if NFS_MOUNT_VERSION >= 4
 407                         } else if (!strcmp(opt, "broken_suid")) {
 408                                 data->flags &= ~NFS_MOUNT_BROKEN_SUID;
 409                                 if (val) {
 410                                         if (nfs_mount_data_version < 4)
 411                                                 goto bad_option;
 412                                         data->flags |= NFS_MOUNT_BROKEN_SUID;
 413                                 }
 414                         } else if (!strcmp(opt, "acl")) {
 415                                 data->flags &= ~NFS_MOUNT_NOACL;
 416                                 if (!val)
 417                                         data->flags |= NFS_MOUNT_NOACL;
 418                         } else if (!strcmp(opt, "rdirplus")) {
 419                                 data->flags &= ~NFS_MOUNT_NORDIRPLUS;
 420                                 if (!val)
 421                                         data->flags |= NFS_MOUNT_NORDIRPLUS;
 422                         } else if (!strcmp(opt, "sharecache")) {
 423                                 data->flags &= ~NFS_MOUNT_UNSHARED;
 424                                 if (!val)
 425                                         data->flags |= NFS_MOUNT_UNSHARED;
 426 #endif
 427                         } else {
 428                         bad_option:
 429                                 if (sloppy)
 430                                         continue;
 431                                 nfs_error(_("%s: Unsupported nfs mount option:"
 432                                                 " %s%s"), progname,
 433                                                 val ? "" : "no", opt);
 434                                 goto out_bad;
 435                         }
 436                         sprintf(cbuf, val ? "%s,":"no%s,", opt);
 437                 }
 438                 len += strlen(cbuf);
 439                 if (len >= opt_size) {
 440                         nfs_error(_("%s: excessively long option argument"),
 441                                         progname);
 442                         goto out_bad;
 443                 }
 444                 strcat(new_opts, cbuf);
 445         }
 446         /* See if the nfs host = mount host. */
 447         if (mounthost) {
 448                 if (!nfs_gethostbyname(mounthost, mnt_saddr))
 449                         goto out_bad;
 450                 *mnt_server->hostname = mounthost;
 451         }
 452         return 1;
 453  bad_parameter:
 454         nfs_error(_("%s: Bad nfs mount parameter: %s\n"), progname, opt);
 455  out_bad:
 456         return 0;
 457 }
 458
 459 static int nfsmnt_check_compat(const struct pmap *nfs_pmap,
 460                                 const struct pmap *mnt_pmap)
 461 {
 462         unsigned int max_nfs_vers = (nfs_mount_data_version >= 4) ? 3 : 2;
 463         unsigned int max_mnt_vers = (nfs_mount_data_version >= 4) ? 3 : 2;
 464
 465         if (nfs_pmap->pm_vers == 4) {
 466                 nfs_error(_("%s: Please use '-t nfs4' "
 467                                 "instead of '-o vers=4'"), progname);
 468                 goto out_bad;
 469         }
 470
 471         if (nfs_pmap->pm_vers) {
 472                 if (nfs_pmap->pm_vers > max_nfs_vers || nfs_pmap->pm_vers < 2) {
 473                         nfs_error(_("%s: NFS version %ld is not supported"),
 474                                         progname, nfs_pmap->pm_vers);
 475                         goto out_bad;
 476                 }
 477         }
 478
 479         if (mnt_pmap->pm_vers > max_mnt_vers) {
 480                 nfs_error(_("%s: NFS mount version %ld s not supported"),
 481                                 progname, mnt_pmap->pm_vers);
 482                 goto out_bad;
 483         }
 484
 485         return 1;
 486
 487 out_bad:
 488         return 0;
 489 }
 490
 491 int
 492 nfsmount(const char *spec, const char *node, int flags,
 493          char **extra_opts, int fake)
 494 {
 495         static char *prev_bg_host;
 496         char hostdir[1024];
 497         char *hostname, *dirname, *old_opts, *mounthost = NULL;
 498         char new_opts[1024], cbuf[1024];
 499         static struct nfs_mount_data data;
 500         int val, running_bg = 0;
 501         static int doonce = 0;
 502
 503         clnt_addr_t mnt_server = { &mounthost, };
 504         clnt_addr_t nfs_server = { &hostname, };
 505         struct sockaddr_in *nfs_saddr = &nfs_server.saddr;
 506         struct pmap  *mnt_pmap = &mnt_server.pmap,
 507                      *nfs_pmap = &nfs_server.pmap;
 508         struct pmap  save_mnt, save_nfs;
 509
 510         int fsock = -1;
 511
 512         mntres_t mntres;
 513
 514         struct stat statbuf;
 515         char *s;
 516         int bg, retry;
 517         int retval = EX_FAIL;
 518         time_t t;
 519         time_t prevt;
 520         time_t timeout;
 521
 522         if (strlen(spec) >= sizeof(hostdir)) {
 523                 nfs_error(_("%s: excessively long host:dir argument"),
 524                                 progname);
 525                 goto fail;
 526         }
 527         strcpy(hostdir, spec);
 528         if ((s = strchr(hostdir, ':'))) {
 529                 hostname = hostdir;
 530                 dirname = s + 1;
 531                 *s = '\0';
 532                 /* Ignore all but first hostname in replicated mounts
 533                    until they can be fully supported. (mack@sgi.com) */
 534                 if ((s = strchr(hostdir, ','))) {
 535                         *s = '\0';
 536                         nfs_error(_("%s: warning: "
 537                                   "multiple hostnames not supported"),
 538                                         progname);
 539                 }
 540         } else {
 541                 nfs_error(_("%s: directory to mount not in host:dir format"),
 542                                 progname);
 543                 goto fail;
 544         }
 545
 546         if (!nfs_gethostbyname(hostname, nfs_saddr))
 547                 goto fail;
 548         mounthost = hostname;
 549         memcpy (&mnt_server.saddr, nfs_saddr, sizeof (mnt_server.saddr));
 550
 551         /* add IP address to mtab options for use when unmounting */
 552
 553         s = inet_ntoa(nfs_saddr->sin_addr);
 554         old_opts = *extra_opts;
 555         if (!old_opts)
 556                 old_opts = "";
 557
 558         /* Set default options.
 559          * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
 560          * let the kernel decide.
 561          * timeo is filled in after we know whether it'll be TCP or UDP. */
 562         memset(&data, 0, sizeof(data));
 563         data.acregmin   = 3;
 564         data.acregmax   = 60;
 565         data.acdirmin   = 30;
 566         data.acdirmax   = 60;
 567 #if NFS_MOUNT_VERSION >= 2
 568         data.namlen     = NAME_MAX;
 569 #endif
 570
 571         bg = 0;
 572         retry = 10000;          /* 10000 minutes ~ 1 week */
 573
 574         memset(mnt_pmap, 0, sizeof(*mnt_pmap));
 575         mnt_pmap->pm_prog = MOUNTPROG;
 576         memset(nfs_pmap, 0, sizeof(*nfs_pmap));
 577         nfs_pmap->pm_prog = NFS_PROGRAM;
 578
 579         /* parse options */
 580         new_opts[0] = 0;
 581         if (!parse_options(old_opts, &data, &bg, &retry, &mnt_server, &nfs_server,
 582                            new_opts, sizeof(new_opts)))
 583                 goto fail;
 584         if (!nfsmnt_check_compat(nfs_pmap, mnt_pmap))
 585                 goto fail;
 586
 587         if (retry == 10000 && !bg)
 588                 retry = 2; /* reset for fg mounts */
 589
 590
 591 #ifdef NFS_MOUNT_DEBUG
 592         printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n",
 593                data.rsize, data.wsize, data.timeo, data.retrans);
 594         printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n",
 595                data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
 596         printf("port = %d, bg = %d, retry = %d, flags = %.8x\n",
 597                nfs_pmap->pm_port, bg, retry, data.flags);
 598         printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n",
 599                mnt_pmap->pm_prog, mnt_pmap->pm_vers,
 600                nfs_pmap->pm_prog, nfs_pmap->pm_vers);
 601         printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d ",
 602                (data.flags & NFS_MOUNT_SOFT) != 0,
 603                (data.flags & NFS_MOUNT_INTR) != 0,
 604                (data.flags & NFS_MOUNT_POSIX) != 0,
 605                (data.flags & NFS_MOUNT_NOCTO) != 0,
 606                (data.flags & NFS_MOUNT_NOAC) != 0);
 607 #if NFS_MOUNT_VERSION >= 2
 608         printf("tcp = %d ",
 609                (data.flags & NFS_MOUNT_TCP) != 0);
 610 #endif
 611 #if NFS_MOUNT_VERSION >= 4
 612         printf("noacl = %d ", (data.flags & NFS_MOUNT_NOACL) != 0);
 613 #endif
 614 #if NFS_MOUNT_VERSION >= 5
 615         printf("sec = %u ", data.pseudoflavor);
 616         printf("readdirplus = %d ", (data.flags & NFS_MOUNT_NORDIRPLUS) != 0);
 617 #endif
 618         printf("\n");
 619 #endif
 620
 621         data.version = nfs_mount_data_version;
 622
 623         if (flags & MS_REMOUNT)
 624                 goto out_ok;
 625
 626         /*
 627          * If the previous mount operation on the same host was
 628          * backgrounded, and the "bg" for this mount is also set,
 629          * give up immediately, to avoid the initial timeout.
 630          */
 631         if (bg && !running_bg &&
 632             prev_bg_host && strcmp(hostname, prev_bg_host) == 0) {
 633                 if (retry > 0)
 634                         retval = EX_BG;
 635                 return retval;
 636         }
 637
 638         /* create mount deamon client */
 639
 640         /*
 641          * The following loop implements the mount retries. On the first
 642          * call, "running_bg" is 0. When the mount times out, and the
 643          * "bg" option is set, the exit status EX_BG will be returned.
 644          * For a backgrounded mount, there will be a second call by the
 645          * child process with "running_bg" set to 1.
 646          *
 647          * The case where the mount point is not present and the "bg"
 648          * option is set, is treated as a timeout. This is done to
 649          * support nested mounts.
 650          *
 651          * The "retry" count specified by the user is the number of
 652          * minutes to retry before giving up.
 653          *
 654          * Only the first error message will be displayed.
 655          */
 656         timeout = time(NULL) + 60 * retry;
 657         prevt = 0;
 658         t = 30;
 659         val = 1;
 660
 661         memcpy(&save_nfs, nfs_pmap, sizeof(save_nfs));
 662         memcpy(&save_mnt, mnt_pmap, sizeof(save_mnt));
 663         for (;;) {
 664                 if (bg && stat(node, &statbuf) == -1) {
 665                         /* no mount point yet - sleep */
 666                         if (running_bg) {
 667                                 sleep(val);     /* 1, 2, 4, 8, 16, 30, ... */
 668                                 val *= 2;
 669                                 if (val > 30)
 670                                         val = 30;
 671                         }
 672                 } else {
 673                         int stat;
 674                         /* be careful not to use too many CPU cycles */
 675                         if (t - prevt < 30)
 676                                 sleep(30);
 677
 678                         stat = nfs_call_mount(&mnt_server, &nfs_server,
 679                                               &dirname, &mntres);
 680                         if (stat)
 681                                 break;
 682                         memcpy(nfs_pmap, &save_nfs, sizeof(*nfs_pmap));
 683                         memcpy(mnt_pmap, &save_mnt, sizeof(*mnt_pmap));
 684                         prevt = t;
 685                 }
 686                 if (!bg) {
 687                         switch(rpc_createerr.cf_stat){
 688                         case RPC_TIMEDOUT:
 689                                 break;
 690                         case RPC_SYSTEMERROR:
 691                                 if (errno == ETIMEDOUT)
 692                                         break;
 693                         default:
 694                                 mount_errors(*nfs_server.hostname, 0, bg);
 695                         goto fail;
 696                         }
 697                         t = time(NULL);
 698                         if (t >= timeout) {
 699                                 mount_errors(*nfs_server.hostname, 0, bg);
 700                                 goto fail;
 701                         }
 702                         mount_errors(*nfs_server.hostname, 1, bg);
 703                         continue;
 704                 }
 705                 if (!running_bg) {
 706                         prev_bg_host = xstrdup(hostname);
 707                         if (retry > 0)
 708                                 retval = EX_BG;
 709                         goto fail;
 710                 }
 711                 t = time(NULL);
 712                 if (t >= timeout) {
 713                         mount_errors(*nfs_server.hostname, 0, bg);
 714                         goto fail;
 715                 }
 716                 if (doonce++ < 1)
 717                         mount_errors(*nfs_server.hostname, 1, bg);
 718         }
 719
 720         if (nfs_pmap->pm_vers == 2) {
 721                 if (mntres.nfsv2.fhs_status != 0) {
 722                         nfs_error(_("%s: %s:%s failed, reason given by server: %s"),
 723                                         progname, hostname, dirname,
 724                                         nfs_strerror(mntres.nfsv2.fhs_status));
 725                         goto fail;
 726                 }
 727                 memcpy(data.root.data,
 728                        (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
 729                        NFS_FHSIZE);
 730 #if NFS_MOUNT_VERSION >= 4
 731                 data.root.size = NFS_FHSIZE;
 732                 memcpy(data.old_root.data,
 733                        (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
 734                        NFS_FHSIZE);
 735 #endif
 736         } else {
 737 #if NFS_MOUNT_VERSION >= 4
 738                 mountres3_ok *mountres;
 739                 fhandle3 *fhandle;
 740                 int i, *flavor, yum = 0;
 741                 if (mntres.nfsv3.fhs_status != 0) {
 742                         nfs_error(_("%s: %s:%s failed, reason given by server: %s"),
 743                                         progname, hostname, dirname,
 744                                         nfs_strerror(mntres.nfsv3.fhs_status));
 745                         goto fail;
 746                 }
 747 #if NFS_MOUNT_VERSION >= 5
 748                 mountres = &mntres.nfsv3.mountres3_u.mountinfo;
 749                 i = mountres->auth_flavors.auth_flavors_len;
 750                 if (i <= 0)
 751                         goto noauth_flavors;
 752
 753                 flavor = mountres->auth_flavors.auth_flavors_val;
 754                 while (--i >= 0) {
 755                         /* If no flavour requested, use first simple
 756                          * flavour that is offered.
 757                          */
 758                         if (! (data.flags & NFS_MOUNT_SECFLAVOUR) &&
 759                             (flavor[i] == AUTH_SYS ||
 760                              flavor[i] == AUTH_NONE)) {
 761                                 data.pseudoflavor = flavor[i];
 762                                 data.flags |= NFS_MOUNT_SECFLAVOUR;
 763                         }
 764                         if (flavor[i] == data.pseudoflavor)
 765                                 yum = 1;
 766 #ifdef NFS_MOUNT_DEBUG
 767                         printf("auth flavor %d: %d\n",
 768                                 i, flavor[i]);
 769 #endif
 770                 }
 771                 if (!yum) {
 772                         nfs_error(_("%s: %s:%s failed, security flavor "
 773                                         "not supported"),
 774                                         progname, hostname, dirname);
 775                         /* server has registered us in rmtab, send umount */
 776                         nfs_call_umount(&mnt_server, &dirname);
 777                         goto fail;
 778                 }
 779 noauth_flavors:
 780 #endif
 781                 fhandle = &mntres.nfsv3.mountres3_u.mountinfo.fhandle;
 782                 memset(data.old_root.data, 0, NFS_FHSIZE);
 783                 memset(&data.root, 0, sizeof(data.root));
 784                 data.root.size = fhandle->fhandle3_len;
 785                 memcpy(data.root.data,
 786                        (char *) fhandle->fhandle3_val,
 787                        fhandle->fhandle3_len);
 788
 789                 data.flags |= NFS_MOUNT_VER3;
 790 #endif
 791         }
 792
 793         if (nfs_mount_data_version == 1) {
 794                 /* create nfs socket for kernel */
 795                 if (nfs_pmap->pm_prot == IPPROTO_TCP)
 796                         fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 797                 else
 798                         fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 799                 if (fsock < 0) {
 800                         perror(_("nfs socket"));
 801                         goto fail;
 802                 }
 803                 if (bindresvport(fsock, 0) < 0) {
 804                         perror(_("nfs bindresvport"));
 805                         goto fail;
 806                 }
 807         }
 808
 809 #ifdef NFS_MOUNT_DEBUG
 810         printf(_("using port %d for nfs deamon\n"), nfs_pmap->pm_port);
 811 #endif
 812         nfs_saddr->sin_port = htons(nfs_pmap->pm_port);
 813         /*
 814          * connect() the socket for kernels 1.3.10 and below only,
 815          * to avoid problems with multihomed hosts.
 816          * --Swen
 817          */
 818         if (linux_version_code() <= 0x01030a && fsock != -1
 819             && connect(fsock, (struct sockaddr *) nfs_saddr,
 820                        sizeof (*nfs_saddr)) < 0) {
 821                 perror(_("nfs connect"));
 822                 goto fail;
 823         }
 824
 825 #if NFS_MOUNT_VERSION >= 2
 826         if (nfs_pmap->pm_prot == IPPROTO_TCP)
 827                 data.flags |= NFS_MOUNT_TCP;
 828         else
 829                 data.flags &= ~NFS_MOUNT_TCP;
 830 #endif
 831
 832         /* prepare data structure for kernel */
 833
 834         data.fd = fsock;
 835         memcpy((char *) &data.addr, (char *) nfs_saddr, sizeof(data.addr));
 836         strncpy(data.hostname, hostname, sizeof(data.hostname));
 837
 838  out_ok:
 839         /* Ensure we have enough padding for the following strcat()s */
 840         if (strlen(new_opts) + strlen(s) + 30 >= sizeof(new_opts)) {
 841                 nfs_error(_("%s: excessively long option argument"),
 842                                 progname);
 843                 goto fail;
 844         }
 845
 846         snprintf(cbuf, sizeof(cbuf)-1, "addr=%s", s);
 847         strcat(new_opts, cbuf);
 848
 849         *extra_opts = xstrdup(new_opts);
 850
 851         if (!fake && !(data.flags & NFS_MOUNT_NONLM)) {
 852                 if (!start_statd()) {
 853                         nfs_error(_("%s: rpc.statd is not running but is "
 854                                 "required for remote locking.\n"
 855                                 "   Either use '-o nolocks' to keep "
 856                                 "locks local, or start statd."),
 857                                         progname);
 858                         goto fail;
 859                 }
 860         }
 861
 862         if (!fake) {
 863                 if (mount(spec, node, "nfs",
 864                                 flags & ~(MS_USER|MS_USERS), &data)) {
 865                         mount_error(spec, node, errno);
 866                         goto fail;
 867                 }
 868         }
 869
 870         return 0;
 871
 872         /* abort */
 873  fail:
 874         if (fsock != -1)
 875                 close(fsock);
 876         return retval;
 877 }