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 "xcommon.h"
  60 #include "mount.h"
  61 #include "nfs_mount.h"
  62 #include "mount_constants.h"
  63 #include "nls.h"
  64 #include "error.h"
  65 #include "network.h"
  66
  67 #ifndef NFS_PORT
  68 #define NFS_PORT 2049
  69 #endif
  70 #ifndef NFS_FHSIZE
  71 #define NFS_FHSIZE 32
  72 #endif
  73
  74 #ifndef HAVE_INET_ATON
  75 #define inet_aton(a,b) (0)
  76 #endif
  77
  78 typedef dirpath mnt2arg_t;
  79 typedef dirpath mnt3arg_t;
  80 typedef dirpath mntarg_t;
  81
  82 typedef struct fhstatus  mnt2res_t;
  83 typedef struct mountres3 mnt3res_t;
  84 typedef union {
  85         mnt2res_t nfsv2;
  86         mnt3res_t nfsv3;
  87 } mntres_t;
  88
  89 extern int nfs_mount_data_version;
  90 extern char *progname;
  91 extern int verbose;
  92 extern int sloppy;
  93
  94 extern int linux_version_code(void);
  95
  96 static inline enum clnt_stat
  97 nfs3_mount(CLIENT *clnt, mnt3arg_t *mnt3arg, mnt3res_t *mnt3res)
  98 {
  99         return clnt_call(clnt, MOUNTPROC3_MNT,
 100                          (xdrproc_t) xdr_dirpath, (caddr_t) mnt3arg,
 101                          (xdrproc_t) xdr_mountres3, (caddr_t) mnt3res,
 102                          TIMEOUT);
 103 }
 104
 105 static inline enum clnt_stat
 106 nfs2_mount(CLIENT *clnt, mnt2arg_t *mnt2arg, mnt2res_t *mnt2res)
 107 {
 108         return clnt_call(clnt, MOUNTPROC_MNT,
 109                          (xdrproc_t) xdr_dirpath, (caddr_t) mnt2arg,
 110                          (xdrproc_t) xdr_fhstatus, (caddr_t) mnt2res,
 111                          TIMEOUT);
 112 }
 113
 114 static int
 115 nfs_call_mount(clnt_addr_t *mnt_server, clnt_addr_t *nfs_server,
 116                mntarg_t *mntarg, mntres_t *mntres)
 117 {
 118         CLIENT *clnt;
 119         enum clnt_stat stat;
 120         int msock;
 121
 122         if (!probe_bothports(mnt_server, nfs_server))
 123                 goto out_bad;
 124
 125         clnt = mnt_openclnt(mnt_server, &msock);
 126         if (!clnt)
 127                 goto out_bad;
 128         /* make pointers in xdr_mountres3 NULL so
 129          * that xdr_array allocates memory for us
 130          */
 131         memset(mntres, 0, sizeof(*mntres));
 132         switch (mnt_server->pmap.pm_vers) {
 133         case 3:
 134                 stat = nfs3_mount(clnt, mntarg, &mntres->nfsv3);
 135                 break;
 136         case 2:
 137         case 1:
 138                 stat = nfs2_mount(clnt, mntarg, &mntres->nfsv2);
 139                 break;
 140         default:
 141                 goto out_bad;
 142         }
 143         if (stat != RPC_SUCCESS) {
 144                 clnt_geterr(clnt, &rpc_createerr.cf_error);
 145                 rpc_createerr.cf_stat = stat;
 146         }
 147         mnt_closeclnt(clnt, msock);
 148         if (stat == RPC_SUCCESS)
 149                 return 1;
 150  out_bad:
 151         return 0;
 152 }
 153
 154 static int
 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)
 158 {
 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;
 162         int len;
 163         char *opt, *opteq, *p, *opt_b;
 164         char *mounthost = NULL;
 165         char cbuf[128];
 166         int open_quote = 0;
 167
 168         data->flags = 0;
 169         *bg = 0;
 170
 171         len = strlen(new_opts);
 172         for (p=old_opts, opt_b=NULL; p && *p; p++) {
 173                 if (!opt_b)
 174                         opt_b = p;              /* begin of the option item */
 175                 if (*p == '"')
 176                         open_quote ^= 1;        /* reverse the status */
 177                 if (open_quote)
 178                         continue;               /* still in a quoted block */
 179                 if (*p == ',')
 180                         *p = '\0';              /* terminate the option item */
 181                 if (*p == '\0' || *(p+1) == '\0') {
 182                         opt = opt_b;            /* opt is useful now */
 183                         opt_b = NULL;
 184                 }
 185                 else
 186                         continue;               /* still somewhere in the option item */
 187
 188                 if (strlen(opt) >= sizeof(cbuf))
 189                         goto bad_parameter;
 190                 if ((opteq = strchr(opt, '=')) && isdigit(opteq[1])) {
 191                         int val = atoi(opteq + 1);
 192                         *opteq = '\0';
 193                         if (!strcmp(opt, "rsize"))
 194                                 data->rsize = val;
 195                         else if (!strcmp(opt, "wsize"))
 196                                 data->wsize = val;
 197                         else if (!strcmp(opt, "timeo"))
 198                                 data->timeo = val;
 199                         else if (!strcmp(opt, "retrans"))
 200                                 data->retrans = val;
 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;
 214                         }
 215                         else if (!strcmp(opt, "retry"))
 216                                 *retry = val;
 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;
 232                                 opt = "nfsvers";
 233 #if NFS_MOUNT_VERSION >= 2
 234                         } else if (!strcmp(opt, "namlen")) {
 235                                 if (nfs_mount_data_version >= 2)
 236                                         data->namlen = val;
 237                                 else if (sloppy)
 238                                         continue;
 239                                 else
 240                                         goto bad_parameter;
 241 #endif
 242                         } else if (!strcmp(opt, "addr")) {
 243                                 /* ignore */;
 244                                 continue;
 245                         } else if (sloppy)
 246                                 continue;
 247                         else
 248                                 goto bad_parameter;
 249                         sprintf(cbuf, "%s=%s,", opt, opteq+1);
 250                 } else if (opteq) {
 251                         *opteq = '\0';
 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;
 263 #endif
 264                                 } else if (sloppy)
 265                                         continue;
 266                                 else
 267                                         goto bad_parameter;
 268 #if NFS_MOUNT_VERSION >= 5
 269                         } else if (!strcmp(opt, "sec")) {
 270                                 char *secflavor = opteq+1;
 271                                 /* see RFC 2623 */
 272                                 if (nfs_mount_data_version < 5) {
 273                                         printf(_("Warning: ignoring sec=%s option\n"),
 274                                                         secflavor);
 275                                         continue;
 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;
 298                                 else if (sloppy)
 299                                         continue;
 300                                 else {
 301                                         printf(_("Warning: Unrecognized security flavor %s.\n"),
 302                                                 secflavor);
 303                                         goto bad_parameter;
 304                                 }
 305                                 data->flags |= NFS_MOUNT_SECFLAVOUR;
 306 #endif
 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);
 313
 314                                 if (ctxlen > NFS_MAX_CONTEXT_LEN) {
 315                                         nfs_error(_("context parameter exceeds"
 316                                                         " limit of %d"),
 317                                                         NFS_MAX_CONTEXT_LEN);
 318                                         goto bad_parameter;
 319                                 }
 320                                 /* The context string is in the format of
 321                                  * "system_u:object_r:...".  We only want
 322                                  * the context str between the quotes.
 323                                  */
 324                                 if (*context == '"')
 325                                         strncpy(data->context, context+1,
 326                                                         ctxlen-2);
 327                                 else
 328                                         strncpy(data->context, context,
 329                                                         NFS_MAX_CONTEXT_LEN);
 330                         } else if (sloppy)
 331                                 continue;
 332                         else
 333                                 goto bad_parameter;
 334                         sprintf(cbuf, "%s=%s,", opt, opteq+1);
 335                 } else {
 336                         int val = 1;
 337                         if (!strncmp(opt, "no", 2)) {
 338                                 val = 0;
 339                                 opt += 2;
 340                         }
 341                         if (!strcmp(opt, "bg"))
 342                                 *bg = val;
 343                         else if (!strcmp(opt, "fg"))
 344                                 *bg = !val;
 345                         else if (!strcmp(opt, "soft")) {
 346                                 data->flags &= ~NFS_MOUNT_SOFT;
 347                                 if (val)
 348                                         data->flags |= NFS_MOUNT_SOFT;
 349                         } else if (!strcmp(opt, "hard")) {
 350                                 data->flags &= ~NFS_MOUNT_SOFT;
 351                                 if (!val)
 352                                         data->flags |= NFS_MOUNT_SOFT;
 353                         } else if (!strcmp(opt, "intr")) {
 354                                 data->flags &= ~NFS_MOUNT_INTR;
 355                                 if (val)
 356                                         data->flags |= NFS_MOUNT_INTR;
 357                         } else if (!strcmp(opt, "posix")) {
 358                                 data->flags &= ~NFS_MOUNT_POSIX;
 359                                 if (val)
 360                                         data->flags |= NFS_MOUNT_POSIX;
 361                         } else if (!strcmp(opt, "cto")) {
 362                                 data->flags &= ~NFS_MOUNT_NOCTO;
 363                                 if (!val)
 364                                         data->flags |= NFS_MOUNT_NOCTO;
 365                         } else if (!strcmp(opt, "ac")) {
 366                                 data->flags &= ~NFS_MOUNT_NOAC;
 367                                 if (!val)
 368                                         data->flags |= NFS_MOUNT_NOAC;
 369 #if NFS_MOUNT_VERSION >= 2
 370                         } else if (!strcmp(opt, "tcp")) {
 371                                 data->flags &= ~NFS_MOUNT_TCP;
 372                                 if (val) {
 373                                         if (nfs_mount_data_version < 2)
 374                                                 goto bad_option;
 375                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 376                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 377                                         data->flags |= NFS_MOUNT_TCP;
 378                                 } else {
 379                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 380                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 381                                 }
 382                         } else if (!strcmp(opt, "udp")) {
 383                                 data->flags &= ~NFS_MOUNT_TCP;
 384                                 if (!val) {
 385                                         if (nfs_mount_data_version < 2)
 386                                                 goto bad_option;
 387                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 388                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 389                                         data->flags |= NFS_MOUNT_TCP;
 390                                 } else {
 391                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 392                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 393                                 }
 394 #endif
 395 #if NFS_MOUNT_VERSION >= 3
 396                         } else if (!strcmp(opt, "lock")) {
 397                                 data->flags &= ~NFS_MOUNT_NONLM;
 398                                 if (!val) {
 399                                         if (nfs_mount_data_version < 3)
 400                                                 goto bad_option;
 401                                         data->flags |= NFS_MOUNT_NONLM;
 402                                 }
 403 #endif
 404 #if NFS_MOUNT_VERSION >= 4
 405                         } else if (!strcmp(opt, "broken_suid")) {
 406                                 data->flags &= ~NFS_MOUNT_BROKEN_SUID;
 407                                 if (val) {
 408                                         if (nfs_mount_data_version < 4)
 409                                                 goto bad_option;
 410                                         data->flags |= NFS_MOUNT_BROKEN_SUID;
 411                                 }
 412                         } else if (!strcmp(opt, "acl")) {
 413                                 data->flags &= ~NFS_MOUNT_NOACL;
 414                                 if (!val)
 415                                         data->flags |= NFS_MOUNT_NOACL;
 416                         } else if (!strcmp(opt, "rdirplus")) {
 417                                 data->flags &= ~NFS_MOUNT_NORDIRPLUS;
 418                                 if (!val)
 419                                         data->flags |= NFS_MOUNT_NORDIRPLUS;
 420                         } else if (!strcmp(opt, "sharecache")) {
 421                                 data->flags &= ~NFS_MOUNT_UNSHARED;
 422                                 if (!val)
 423                                         data->flags |= NFS_MOUNT_UNSHARED;
 424 #endif
 425                         } else {
 426                         bad_option:
 427                                 if (sloppy)
 428                                         continue;
 429                                 nfs_error(_("%s: Unsupported nfs mount option:"
 430                                                 " %s%s"), progname,
 431                                                 val ? "" : "no", opt);
 432                                 goto out_bad;
 433                         }
 434                         sprintf(cbuf, val ? "%s," : "no%s,", opt);
 435                 }
 436                 len += strlen(cbuf);
 437                 if (len >= opt_size) {
 438                         nfs_error(_("%s: excessively long option argument"),
 439                                         progname);
 440                         goto out_bad;
 441                 }
 442                 strcat(new_opts, cbuf);
 443         }
 444         /* See if the nfs host = mount host. */
 445         if (mounthost) {
 446                 if (!nfs_gethostbyname(mounthost, mnt_saddr))
 447                         goto out_bad;
 448                 *mnt_server->hostname = mounthost;
 449         }
 450         return 1;
 451  bad_parameter:
 452         nfs_error(_("%s: Bad nfs mount parameter: %s\n"), progname, opt);
 453  out_bad:
 454         return 0;
 455 }
 456
 457 static int nfsmnt_check_compat(const struct pmap *nfs_pmap,
 458                                 const struct pmap *mnt_pmap)
 459 {
 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;
 462
 463         if (nfs_pmap->pm_vers == 4) {
 464                 nfs_error(_("%s: Please use '-t nfs4' "
 465                                 "instead of '-o vers=4'"), progname);
 466                 goto out_bad;
 467         }
 468
 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);
 473                         goto out_bad;
 474                 }
 475         }
 476
 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);
 480                 goto out_bad;
 481         }
 482
 483         return 1;
 484
 485 out_bad:
 486         return 0;
 487 }
 488
 489 int
 490 nfsmount(const char *spec, const char *node, int flags,
 491          char **extra_opts, int fake, int running_bg)
 492 {
 493         static char *prev_bg_host;
 494         char hostdir[1024];
 495         char *hostname, *dirname, *old_opts, *mounthost = NULL;
 496         char new_opts[1024], cbuf[1024];
 497         static struct nfs_mount_data data;
 498         int val;
 499         static int doonce = 0;
 500
 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;
 507
 508         int fsock = -1;
 509
 510         mntres_t mntres;
 511
 512         struct stat statbuf;
 513         char *s;
 514         int bg, retry;
 515         int retval = EX_FAIL;
 516         time_t t;
 517         time_t prevt;
 518         time_t timeout;
 519
 520         if (strlen(spec) >= sizeof(hostdir)) {
 521                 nfs_error(_("%s: excessively long host:dir argument"),
 522                                 progname);
 523                 goto fail;
 524         }
 525         strcpy(hostdir, spec);
 526         if ((s = strchr(hostdir, ':'))) {
 527                 hostname = hostdir;
 528                 dirname = s + 1;
 529                 *s = '\0';
 530                 /* Ignore all but first hostname in replicated mounts
 531                    until they can be fully supported. (mack@sgi.com) */
 532                 if ((s = strchr(hostdir, ','))) {
 533                         *s = '\0';
 534                         nfs_error(_("%s: warning: "
 535                                   "multiple hostnames not supported"),
 536                                         progname);
 537                 }
 538         } else {
 539                 nfs_error(_("%s: directory to mount not in host:dir format"),
 540                                 progname);
 541                 goto fail;
 542         }
 543
 544         if (!nfs_gethostbyname(hostname, nfs_saddr))
 545                 goto fail;
 546         mounthost = hostname;
 547         memcpy (&mnt_server.saddr, nfs_saddr, sizeof (mnt_server.saddr));
 548
 549         /* add IP address to mtab options for use when unmounting */
 550
 551         s = inet_ntoa(nfs_saddr->sin_addr);
 552         old_opts = *extra_opts;
 553         if (!old_opts)
 554                 old_opts = "";
 555
 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));
 561         data.acregmin   = 3;
 562         data.acregmax   = 60;
 563         data.acdirmin   = 30;
 564         data.acdirmax   = 60;
 565 #if NFS_MOUNT_VERSION >= 2
 566         data.namlen     = NAME_MAX;
 567 #endif
 568
 569         bg = 0;
 570         retry = 10000;          /* 10000 minutes ~ 1 week */
 571
 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;
 576
 577         /* parse options */
 578         new_opts[0] = 0;
 579         if (!parse_options(old_opts, &data, &bg, &retry, &mnt_server, &nfs_server,
 580                            new_opts, sizeof(new_opts)))
 581                 goto fail;
 582         if (!nfsmnt_check_compat(nfs_pmap, mnt_pmap))
 583                 goto fail;
 584
 585         if (retry == 10000 && !bg)
 586                 retry = 2; /* reset for fg mounts */
 587
 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);
 607 #endif
 608 #if NFS_MOUNT_VERSION >= 4
 609         printf(_(", noacl = %d"), (data.flags & NFS_MOUNT_NOACL) != 0);
 610 #endif
 611 #if NFS_MOUNT_VERSION >= 5
 612         printf(_(", sec = %u"), data.pseudoflavor);
 613         printf(_(", readdirplus = %d"), (data.flags & NFS_MOUNT_NORDIRPLUS) != 0);
 614 #endif
 615         printf("\n");
 616 #endif
 617
 618         data.version = nfs_mount_data_version;
 619
 620         if (flags & MS_REMOUNT)
 621                 goto out_ok;
 622
 623         /*
 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.
 627          */
 628         if (bg && !running_bg &&
 629             prev_bg_host && strcmp(hostname, prev_bg_host) == 0) {
 630                 if (retry > 0)
 631                         retval = EX_BG;
 632                 return retval;
 633         }
 634
 635         /* create mount deamon client */
 636
 637         /*
 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.
 643          *
 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.
 647          *
 648          * The "retry" count specified by the user is the number of
 649          * minutes to retry before giving up.
 650          *
 651          * Only the first error message will be displayed.
 652          */
 653         timeout = time(NULL) + 60 * retry;
 654         prevt = 0;
 655         t = 30;
 656         val = 1;
 657
 658         memcpy(&save_nfs, nfs_pmap, sizeof(save_nfs));
 659         memcpy(&save_mnt, mnt_pmap, sizeof(save_mnt));
 660         for (;;) {
 661                 if (bg && stat(node, &statbuf) == -1) {
 662                         /* no mount point yet - sleep */
 663                         if (running_bg) {
 664                                 sleep(val);     /* 1, 2, 4, 8, 16, 30, ... */
 665                                 val *= 2;
 666                                 if (val > 30)
 667                                         val = 30;
 668                         }
 669                 } else {
 670                         int stat;
 671                         /* be careful not to use too many CPU cycles */
 672                         if (t - prevt < 30)
 673                                 sleep(30);
 674
 675                         stat = nfs_call_mount(&mnt_server, &nfs_server,
 676                                               &dirname, &mntres);
 677                         if (stat)
 678                                 break;
 679                         memcpy(nfs_pmap, &save_nfs, sizeof(*nfs_pmap));
 680                         memcpy(mnt_pmap, &save_mnt, sizeof(*mnt_pmap));
 681                         prevt = t;
 682                 }
 683                 if (!bg) {
 684                         switch(rpc_createerr.cf_stat){
 685                         case RPC_TIMEDOUT:
 686                                 break;
 687                         case RPC_SYSTEMERROR:
 688                                 if (errno == ETIMEDOUT)
 689                                         break;
 690                         default:
 691                                 rpc_mount_errors(*nfs_server.hostname, 0, bg);
 692                         goto fail;
 693                         }
 694                         t = time(NULL);
 695                         if (t >= timeout) {
 696                                 rpc_mount_errors(*nfs_server.hostname, 0, bg);
 697                                 goto fail;
 698                         }
 699                         rpc_mount_errors(*nfs_server.hostname, 1, bg);
 700                         continue;
 701                 }
 702                 if (!running_bg) {
 703                         prev_bg_host = xstrdup(hostname);
 704                         if (retry > 0)
 705                                 retval = EX_BG;
 706                         goto fail;
 707                 }
 708                 t = time(NULL);
 709                 if (t >= timeout) {
 710                         rpc_mount_errors(*nfs_server.hostname, 0, bg);
 711                         goto fail;
 712                 }
 713                 if (doonce++ < 1)
 714                         rpc_mount_errors(*nfs_server.hostname, 1, bg);
 715         }
 716
 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));
 722                         goto fail;
 723                 }
 724                 memcpy(data.root.data,
 725                        (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
 726                        NFS_FHSIZE);
 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,
 731                        NFS_FHSIZE);
 732 #endif
 733         } else {
 734 #if NFS_MOUNT_VERSION >= 4
 735                 mountres3_ok *mountres;
 736                 fhandle3 *fhandle;
 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));
 742                         goto fail;
 743                 }
 744 #if NFS_MOUNT_VERSION >= 5
 745                 mountres = &mntres.nfsv3.mountres3_u.mountinfo;
 746                 i = mountres->auth_flavors.auth_flavors_len;
 747                 if (i <= 0)
 748                         goto noauth_flavors;
 749
 750                 flavor = mountres->auth_flavors.auth_flavors_val;
 751                 while (--i >= 0) {
 752                         /* If no flavour requested, use first simple
 753                          * flavour that is offered.
 754                          */
 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;
 760                         }
 761                         if (flavor[i] == data.pseudoflavor)
 762                                 yum = 1;
 763 #ifdef NFS_MOUNT_DEBUG
 764                         printf(_("auth flavor %d: %d\n"), i, flavor[i]);
 765 #endif
 766                 }
 767                 if (!yum) {
 768                         nfs_error(_("%s: %s:%s failed, security flavor "
 769                                         "not supported"),
 770                                         progname, hostname, dirname);
 771                         /* server has registered us in rmtab, send umount */
 772                         nfs_call_umount(&mnt_server, &dirname);
 773                         goto fail;
 774                 }
 775 noauth_flavors:
 776 #endif
 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);
 784
 785                 data.flags |= NFS_MOUNT_VER3;
 786 #endif
 787         }
 788
 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);
 793                 else
 794                         fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 795                 if (fsock < 0) {
 796                         perror(_("nfs socket"));
 797                         goto fail;
 798                 }
 799                 if (bindresvport(fsock, 0) < 0) {
 800                         perror(_("nfs bindresvport"));
 801                         goto fail;
 802                 }
 803         }
 804
 805 #ifdef NFS_MOUNT_DEBUG
 806         printf(_("using port %lu for nfs deamon\n"), nfs_pmap->pm_port);
 807 #endif
 808         nfs_saddr->sin_port = htons(nfs_pmap->pm_port);
 809         /*
 810          * connect() the socket for kernels 1.3.10 and below only,
 811          * to avoid problems with multihomed hosts.
 812          * --Swen
 813          */
 814         if (linux_version_code() <= 0x01030a && fsock != -1
 815             && connect(fsock, (struct sockaddr *) nfs_saddr,
 816                        sizeof (*nfs_saddr)) < 0) {
 817                 perror(_("nfs connect"));
 818                 goto fail;
 819         }
 820
 821 #if NFS_MOUNT_VERSION >= 2
 822         if (nfs_pmap->pm_prot == IPPROTO_TCP)
 823                 data.flags |= NFS_MOUNT_TCP;
 824         else
 825                 data.flags &= ~NFS_MOUNT_TCP;
 826 #endif
 827
 828         /* prepare data structure for kernel */
 829
 830         data.fd = fsock;
 831         memcpy((char *) &data.addr, (char *) nfs_saddr, sizeof(data.addr));
 832         strncpy(data.hostname, hostname, sizeof(data.hostname));
 833
 834  out_ok:
 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"),
 838                                 progname);
 839                 goto fail;
 840         }
 841
 842         snprintf(cbuf, sizeof(cbuf)-1, "addr=%s", s);
 843         strcat(new_opts, cbuf);
 844
 845         *extra_opts = xstrdup(new_opts);
 846
 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."),
 853                                         progname);
 854                         goto fail;
 855                 }
 856         }
 857
 858         if (!fake) {
 859                 if (mount(spec, node, "nfs",
 860                                 flags & ~(MS_USER|MS_USERS), &data)) {
 861                         mount_error(spec, node, errno);
 862                         goto fail;
 863                 }
 864         }
 865
 866         return EX_SUCCESS;
 867
 868         /* abort */
 869  fail:
 870         if (fsock != -1)
 871                 close(fsock);
 872         return retval;
 873 }