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 /* printf("opt=%s\n", opt); */
 194                         if (!strcmp(opt, "rsize"))
 195                                 data->rsize = val;
 196                         else if (!strcmp(opt, "wsize"))
 197                                 data->wsize = val;
 198                         else if (!strcmp(opt, "timeo"))
 199                                 data->timeo = val;
 200                         else if (!strcmp(opt, "retrans"))
 201                                 data->retrans = val;
 202                         else if (!strcmp(opt, "acregmin"))
 203                                 data->acregmin = val;
 204                         else if (!strcmp(opt, "acregmax"))
 205                                 data->acregmax = val;
 206                         else if (!strcmp(opt, "acdirmin"))
 207                                 data->acdirmin = val;
 208                         else if (!strcmp(opt, "acdirmax"))
 209                                 data->acdirmax = val;
 210                         else if (!strcmp(opt, "actimeo")) {
 211                                 data->acregmin = val;
 212                                 data->acregmax = val;
 213                                 data->acdirmin = val;
 214                                 data->acdirmax = val;
 215                         }
 216                         else if (!strcmp(opt, "retry"))
 217                                 *retry = val;
 218                         else if (!strcmp(opt, "port"))
 219                                 nfs_pmap->pm_port = val;
 220                         else if (!strcmp(opt, "mountport"))
 221                                 mnt_pmap->pm_port = val;
 222                         else if (!strcmp(opt, "mountprog"))
 223                                 mnt_pmap->pm_prog = val;
 224                         else if (!strcmp(opt, "mountvers"))
 225                                 mnt_pmap->pm_vers = val;
 226                         else if (!strcmp(opt, "mounthost"))
 227                                 mounthost=xstrndup(opteq+1, strcspn(opteq+1," \t\n\r,"));
 228                         else if (!strcmp(opt, "nfsprog"))
 229                                 nfs_pmap->pm_prog = val;
 230                         else if (!strcmp(opt, "nfsvers") ||
 231                                  !strcmp(opt, "vers")) {
 232                                 nfs_pmap->pm_vers = val;
 233                                 opt = "nfsvers";
 234 #if NFS_MOUNT_VERSION >= 2
 235                         } else if (!strcmp(opt, "namlen")) {
 236                                 if (nfs_mount_data_version >= 2)
 237                                         data->namlen = val;
 238                                 else if (sloppy)
 239                                         continue;
 240                                 else
 241                                         goto bad_parameter;
 242 #endif
 243                         } else if (!strcmp(opt, "addr")) {
 244                                 /* ignore */;
 245                                 continue;
 246                         } else if (sloppy)
 247                                 continue;
 248                         else
 249                                 goto bad_parameter;
 250                         sprintf(cbuf, "%s=%s,", opt, opteq+1);
 251                 } else if (opteq) {
 252                         *opteq = '\0';
 253                         if (!strcmp(opt, "proto")) {
 254                                 if (!strcmp(opteq+1, "udp")) {
 255                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 256                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 257 #if NFS_MOUNT_VERSION >= 2
 258                                         data->flags &= ~NFS_MOUNT_TCP;
 259                                 } else if (!strcmp(opteq+1, "tcp") &&
 260                                            nfs_mount_data_version > 2) {
 261                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 262                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 263                                         data->flags |= NFS_MOUNT_TCP;
 264 #endif
 265                                 } else if (sloppy)
 266                                         continue;
 267                                 else
 268                                         goto bad_parameter;
 269 #if NFS_MOUNT_VERSION >= 5
 270                         } else if (!strcmp(opt, "sec")) {
 271                                 char *secflavor = opteq+1;
 272                                 /* see RFC 2623 */
 273                                 if (nfs_mount_data_version < 5) {
 274                                         printf(_("Warning: ignoring sec=%s option\n"),
 275                                                         secflavor);
 276                                         continue;
 277                                 } else if (!strcmp(secflavor, "none"))
 278                                         data->pseudoflavor = AUTH_NONE;
 279                                 else if (!strcmp(secflavor, "sys"))
 280                                         data->pseudoflavor = AUTH_SYS;
 281                                 else if (!strcmp(secflavor, "krb5"))
 282                                         data->pseudoflavor = AUTH_GSS_KRB5;
 283                                 else if (!strcmp(secflavor, "krb5i"))
 284                                         data->pseudoflavor = AUTH_GSS_KRB5I;
 285                                 else if (!strcmp(secflavor, "krb5p"))
 286                                         data->pseudoflavor = AUTH_GSS_KRB5P;
 287                                 else if (!strcmp(secflavor, "lipkey"))
 288                                         data->pseudoflavor = AUTH_GSS_LKEY;
 289                                 else if (!strcmp(secflavor, "lipkey-i"))
 290                                         data->pseudoflavor = AUTH_GSS_LKEYI;
 291                                 else if (!strcmp(secflavor, "lipkey-p"))
 292                                         data->pseudoflavor = AUTH_GSS_LKEYP;
 293                                 else if (!strcmp(secflavor, "spkm3"))
 294                                         data->pseudoflavor = AUTH_GSS_SPKM;
 295                                 else if (!strcmp(secflavor, "spkm3i"))
 296                                         data->pseudoflavor = AUTH_GSS_SPKMI;
 297                                 else if (!strcmp(secflavor, "spkm3p"))
 298                                         data->pseudoflavor = AUTH_GSS_SPKMP;
 299                                 else if (sloppy)
 300                                         continue;
 301                                 else {
 302                                         printf(_("Warning: Unrecognized security flavor %s.\n"),
 303                                                 secflavor);
 304                                         goto bad_parameter;
 305                                 }
 306                                 data->flags |= NFS_MOUNT_SECFLAVOUR;
 307 #endif
 308                         } else if (!strcmp(opt, "mounthost"))
 309                                 mounthost=xstrndup(opteq+1,
 310                                                    strcspn(opteq+1," \t\n\r,"));
 311                          else if (!strcmp(opt, "context")) {
 312                                 char *context = opteq + 1;
 313                                 int ctxlen = strlen(context);
 314
 315                                 if (ctxlen > NFS_MAX_CONTEXT_LEN) {
 316                                         nfs_error(_("context parameter exceeds"
 317                                                         " limit of %d"),
 318                                                         NFS_MAX_CONTEXT_LEN);
 319                                         goto bad_parameter;
 320                                 }
 321                                 /* The context string is in the format of
 322                                  * "system_u:object_r:...".  We only want
 323                                  * the context str between the quotes.
 324                                  */
 325                                 if (*context == '"')
 326                                         strncpy(data->context, context+1,
 327                                                         ctxlen-2);
 328                                 else
 329                                         strncpy(data->context, context,
 330                                                         NFS_MAX_CONTEXT_LEN);
 331                         } else if (sloppy)
 332                                 continue;
 333                         else
 334                                 goto bad_parameter;
 335                         sprintf(cbuf, "%s=%s,", opt, opteq+1);
 336                 } else {
 337                         int val = 1;
 338                         if (!strncmp(opt, "no", 2)) {
 339                                 val = 0;
 340                                 opt += 2;
 341                         }
 342                         if (!strcmp(opt, "bg"))
 343                                 *bg = val;
 344                         else if (!strcmp(opt, "fg"))
 345                                 *bg = !val;
 346                         else if (!strcmp(opt, "soft")) {
 347                                 data->flags &= ~NFS_MOUNT_SOFT;
 348                                 if (val)
 349                                         data->flags |= NFS_MOUNT_SOFT;
 350                         } else if (!strcmp(opt, "hard")) {
 351                                 data->flags &= ~NFS_MOUNT_SOFT;
 352                                 if (!val)
 353                                         data->flags |= NFS_MOUNT_SOFT;
 354                         } else if (!strcmp(opt, "intr")) {
 355                                 data->flags &= ~NFS_MOUNT_INTR;
 356                                 if (val)
 357                                         data->flags |= NFS_MOUNT_INTR;
 358                         } else if (!strcmp(opt, "posix")) {
 359                                 data->flags &= ~NFS_MOUNT_POSIX;
 360                                 if (val)
 361                                         data->flags |= NFS_MOUNT_POSIX;
 362                         } else if (!strcmp(opt, "cto")) {
 363                                 data->flags &= ~NFS_MOUNT_NOCTO;
 364                                 if (!val)
 365                                         data->flags |= NFS_MOUNT_NOCTO;
 366                         } else if (!strcmp(opt, "ac")) {
 367                                 data->flags &= ~NFS_MOUNT_NOAC;
 368                                 if (!val)
 369                                         data->flags |= NFS_MOUNT_NOAC;
 370 #if NFS_MOUNT_VERSION >= 2
 371                         } else if (!strcmp(opt, "tcp")) {
 372                                 data->flags &= ~NFS_MOUNT_TCP;
 373                                 if (val) {
 374                                         if (nfs_mount_data_version < 2)
 375                                                 goto bad_option;
 376                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 377                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 378                                         data->flags |= NFS_MOUNT_TCP;
 379                                 } else {
 380                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 381                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 382                                 }
 383                         } else if (!strcmp(opt, "udp")) {
 384                                 data->flags &= ~NFS_MOUNT_TCP;
 385                                 if (!val) {
 386                                         if (nfs_mount_data_version < 2)
 387                                                 goto bad_option;
 388                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 389                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 390                                         data->flags |= NFS_MOUNT_TCP;
 391                                 } else {
 392                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 393                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 394                                 }
 395 #endif
 396 #if NFS_MOUNT_VERSION >= 3
 397                         } else if (!strcmp(opt, "lock")) {
 398                                 data->flags &= ~NFS_MOUNT_NONLM;
 399                                 if (!val) {
 400                                         if (nfs_mount_data_version < 3)
 401                                                 goto bad_option;
 402                                         data->flags |= NFS_MOUNT_NONLM;
 403                                 }
 404 #endif
 405 #if NFS_MOUNT_VERSION >= 4
 406                         } else if (!strcmp(opt, "broken_suid")) {
 407                                 data->flags &= ~NFS_MOUNT_BROKEN_SUID;
 408                                 if (val) {
 409                                         if (nfs_mount_data_version < 4)
 410                                                 goto bad_option;
 411                                         data->flags |= NFS_MOUNT_BROKEN_SUID;
 412                                 }
 413                         } else if (!strcmp(opt, "acl")) {
 414                                 data->flags &= ~NFS_MOUNT_NOACL;
 415                                 if (!val)
 416                                         data->flags |= NFS_MOUNT_NOACL;
 417                         } else if (!strcmp(opt, "rdirplus")) {
 418                                 data->flags &= ~NFS_MOUNT_NORDIRPLUS;
 419                                 if (!val)
 420                                         data->flags |= NFS_MOUNT_NORDIRPLUS;
 421                         } else if (!strcmp(opt, "sharecache")) {
 422                                 data->flags &= ~NFS_MOUNT_UNSHARED;
 423                                 if (!val)
 424                                         data->flags |= NFS_MOUNT_UNSHARED;
 425 #endif
 426                         } else {
 427                         bad_option:
 428                                 if (sloppy)
 429                                         continue;
 430                                 nfs_error(_("%s: Unsupported nfs mount option:"
 431                                                 " %s%s"), progname,
 432                                                 val ? "" : "no", opt);
 433                                 goto out_bad;
 434                         }
 435                         sprintf(cbuf, val ? "%s,":"no%s,", opt);
 436                 }
 437                 len += strlen(cbuf);
 438                 if (len >= opt_size) {
 439                         nfs_error(_("%s: excessively long option argument"),
 440                                         progname);
 441                         goto out_bad;
 442                 }
 443                 strcat(new_opts, cbuf);
 444         }
 445         /* See if the nfs host = mount host. */
 446         if (mounthost) {
 447                 if (!nfs_gethostbyname(mounthost, mnt_saddr))
 448                         goto out_bad;
 449                 *mnt_server->hostname = mounthost;
 450         }
 451         return 1;
 452  bad_parameter:
 453         nfs_error(_("%s: Bad nfs mount parameter: %s\n"), progname, opt);
 454  out_bad:
 455         return 0;
 456 }
 457
 458 static int nfsmnt_check_compat(const struct pmap *nfs_pmap,
 459                                 const struct pmap *mnt_pmap)
 460 {
 461         unsigned int max_nfs_vers = (nfs_mount_data_version >= 4) ? 3 : 2;
 462         unsigned int max_mnt_vers = (nfs_mount_data_version >= 4) ? 3 : 2;
 463
 464         if (nfs_pmap->pm_vers == 4) {
 465                 nfs_error(_("%s: Please use '-t nfs4' "
 466                                 "instead of '-o vers=4'"), progname);
 467                 goto out_bad;
 468         }
 469
 470         if (nfs_pmap->pm_vers) {
 471                 if (nfs_pmap->pm_vers > max_nfs_vers || nfs_pmap->pm_vers < 2) {
 472                         nfs_error(_("%s: NFS version %ld is not supported"),
 473                                         progname, nfs_pmap->pm_vers);
 474                         goto out_bad;
 475                 }
 476         }
 477
 478         if (mnt_pmap->pm_vers > max_mnt_vers) {
 479                 nfs_error(_("%s: NFS mount version %ld s not supported"),
 480                                 progname, mnt_pmap->pm_vers);
 481                 goto out_bad;
 482         }
 483
 484         return 1;
 485
 486 out_bad:
 487         return 0;
 488 }
 489
 490 int
 491 nfsmount(const char *spec, const char *node, int flags,
 492          char **extra_opts, int fake)
 493 {
 494         static char *prev_bg_host;
 495         char hostdir[1024];
 496         char *hostname, *dirname, *old_opts, *mounthost = NULL;
 497         char new_opts[1024], cbuf[1024];
 498         static struct nfs_mount_data data;
 499         int val, running_bg = 0;
 500         static int doonce = 0;
 501
 502         clnt_addr_t mnt_server = { &mounthost, };
 503         clnt_addr_t nfs_server = { &hostname, };
 504         struct sockaddr_in *nfs_saddr = &nfs_server.saddr;
 505         struct pmap  *mnt_pmap = &mnt_server.pmap,
 506                      *nfs_pmap = &nfs_server.pmap;
 507         struct pmap  save_mnt, save_nfs;
 508
 509         int fsock = -1;
 510
 511         mntres_t mntres;
 512
 513         struct stat statbuf;
 514         char *s;
 515         int bg, retry;
 516         int retval = EX_FAIL;
 517         time_t t;
 518         time_t prevt;
 519         time_t timeout;
 520
 521         if (strlen(spec) >= sizeof(hostdir)) {
 522                 nfs_error(_("%s: excessively long host:dir argument"),
 523                                 progname);
 524                 goto fail;
 525         }
 526         strcpy(hostdir, spec);
 527         if ((s = strchr(hostdir, ':'))) {
 528                 hostname = hostdir;
 529                 dirname = s + 1;
 530                 *s = '\0';
 531                 /* Ignore all but first hostname in replicated mounts
 532                    until they can be fully supported. (mack@sgi.com) */
 533                 if ((s = strchr(hostdir, ','))) {
 534                         *s = '\0';
 535                         nfs_error(_("%s: warning: "
 536                                   "multiple hostnames not supported"),
 537                                         progname);
 538                 }
 539         } else {
 540                 nfs_error(_("%s: directory to mount not in host:dir format"),
 541                                 progname);
 542                 goto fail;
 543         }
 544
 545         if (!nfs_gethostbyname(hostname, nfs_saddr))
 546                 goto fail;
 547         mounthost = hostname;
 548         memcpy (&mnt_server.saddr, nfs_saddr, sizeof (mnt_server.saddr));
 549
 550         /* add IP address to mtab options for use when unmounting */
 551
 552         s = inet_ntoa(nfs_saddr->sin_addr);
 553         old_opts = *extra_opts;
 554         if (!old_opts)
 555                 old_opts = "";
 556
 557         /* Set default options.
 558          * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
 559          * let the kernel decide.
 560          * timeo is filled in after we know whether it'll be TCP or UDP. */
 561         memset(&data, 0, sizeof(data));
 562         data.acregmin   = 3;
 563         data.acregmax   = 60;
 564         data.acdirmin   = 30;
 565         data.acdirmax   = 60;
 566 #if NFS_MOUNT_VERSION >= 2
 567         data.namlen     = NAME_MAX;
 568 #endif
 569
 570         bg = 0;
 571         retry = 10000;          /* 10000 minutes ~ 1 week */
 572
 573         memset(mnt_pmap, 0, sizeof(*mnt_pmap));
 574         mnt_pmap->pm_prog = MOUNTPROG;
 575         memset(nfs_pmap, 0, sizeof(*nfs_pmap));
 576         nfs_pmap->pm_prog = NFS_PROGRAM;
 577
 578         /* parse options */
 579         new_opts[0] = 0;
 580         if (!parse_options(old_opts, &data, &bg, &retry, &mnt_server, &nfs_server,
 581                            new_opts, sizeof(new_opts)))
 582                 goto fail;
 583         if (!nfsmnt_check_compat(nfs_pmap, mnt_pmap))
 584                 goto fail;
 585
 586         if (retry == 10000 && !bg)
 587                 retry = 2; /* reset for fg mounts */
 588
 589
 590 #ifdef NFS_MOUNT_DEBUG
 591         printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n",
 592                data.rsize, data.wsize, data.timeo, data.retrans);
 593         printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n",
 594                data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
 595         printf("port = %d, bg = %d, retry = %d, flags = %.8x\n",
 596                nfs_pmap->pm_port, bg, retry, data.flags);
 597         printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n",
 598                mnt_pmap->pm_prog, mnt_pmap->pm_vers,
 599                nfs_pmap->pm_prog, nfs_pmap->pm_vers);
 600         printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d ",
 601                (data.flags & NFS_MOUNT_SOFT) != 0,
 602                (data.flags & NFS_MOUNT_INTR) != 0,
 603                (data.flags & NFS_MOUNT_POSIX) != 0,
 604                (data.flags & NFS_MOUNT_NOCTO) != 0,
 605                (data.flags & NFS_MOUNT_NOAC) != 0);
 606 #if NFS_MOUNT_VERSION >= 2
 607         printf("tcp = %d ",
 608                (data.flags & NFS_MOUNT_TCP) != 0);
 609 #endif
 610 #if NFS_MOUNT_VERSION >= 4
 611         printf("noacl = %d ", (data.flags & NFS_MOUNT_NOACL) != 0);
 612 #endif
 613 #if NFS_MOUNT_VERSION >= 5
 614         printf("sec = %u ", data.pseudoflavor);
 615         printf("readdirplus = %d ", (data.flags & NFS_MOUNT_NORDIRPLUS) != 0);
 616 #endif
 617         printf("\n");
 618 #endif
 619
 620         data.version = nfs_mount_data_version;
 621
 622         if (flags & MS_REMOUNT)
 623                 goto out_ok;
 624
 625         /*
 626          * If the previous mount operation on the same host was
 627          * backgrounded, and the "bg" for this mount is also set,
 628          * give up immediately, to avoid the initial timeout.
 629          */
 630         if (bg && !running_bg &&
 631             prev_bg_host && strcmp(hostname, prev_bg_host) == 0) {
 632                 if (retry > 0)
 633                         retval = EX_BG;
 634                 return retval;
 635         }
 636
 637         /* create mount deamon client */
 638
 639         /*
 640          * The following loop implements the mount retries. On the first
 641          * call, "running_bg" is 0. When the mount times out, and the
 642          * "bg" option is set, the exit status EX_BG will be returned.
 643          * For a backgrounded mount, there will be a second call by the
 644          * child process with "running_bg" set to 1.
 645          *
 646          * The case where the mount point is not present and the "bg"
 647          * option is set, is treated as a timeout. This is done to
 648          * support nested mounts.
 649          *
 650          * The "retry" count specified by the user is the number of
 651          * minutes to retry before giving up.
 652          *
 653          * Only the first error message will be displayed.
 654          */
 655         timeout = time(NULL) + 60 * retry;
 656         prevt = 0;
 657         t = 30;
 658         val = 1;
 659
 660         memcpy(&save_nfs, nfs_pmap, sizeof(save_nfs));
 661         memcpy(&save_mnt, mnt_pmap, sizeof(save_mnt));
 662         for (;;) {
 663                 if (bg && stat(node, &statbuf) == -1) {
 664                         /* no mount point yet - sleep */
 665                         if (running_bg) {
 666                                 sleep(val);     /* 1, 2, 4, 8, 16, 30, ... */
 667                                 val *= 2;
 668                                 if (val > 30)
 669                                         val = 30;
 670                         }
 671                 } else {
 672                         int stat;
 673                         /* be careful not to use too many CPU cycles */
 674                         if (t - prevt < 30)
 675                                 sleep(30);
 676
 677                         stat = nfs_call_mount(&mnt_server, &nfs_server,
 678                                               &dirname, &mntres);
 679                         if (stat)
 680                                 break;
 681                         memcpy(nfs_pmap, &save_nfs, sizeof(*nfs_pmap));
 682                         memcpy(mnt_pmap, &save_mnt, sizeof(*mnt_pmap));
 683                         prevt = t;
 684                 }
 685                 if (!bg) {
 686                         switch(rpc_createerr.cf_stat){
 687                         case RPC_TIMEDOUT:
 688                                 break;
 689                         case RPC_SYSTEMERROR:
 690                                 if (errno == ETIMEDOUT)
 691                                         break;
 692                         default:
 693                                 mount_errors(*nfs_server.hostname, 0, bg);
 694                         goto fail;
 695                         }
 696                         t = time(NULL);
 697                         if (t >= timeout) {
 698                                 mount_errors(*nfs_server.hostname, 0, bg);
 699                                 goto fail;
 700                         }
 701                         mount_errors(*nfs_server.hostname, 1, bg);
 702                         continue;
 703                 }
 704                 if (!running_bg) {
 705                         prev_bg_host = xstrdup(hostname);
 706                         if (retry > 0)
 707                                 retval = EX_BG;
 708                         goto fail;
 709                 }
 710                 t = time(NULL);
 711                 if (t >= timeout) {
 712                         mount_errors(*nfs_server.hostname, 0, bg);
 713                         goto fail;
 714                 }
 715                 if (doonce++ < 1)
 716                         mount_errors(*nfs_server.hostname, 1, bg);
 717         }
 718
 719         if (nfs_pmap->pm_vers == 2) {
 720                 if (mntres.nfsv2.fhs_status != 0) {
 721                         nfs_error(_("%s: %s:%s failed, reason given by server: %s"),
 722                                         progname, hostname, dirname,
 723                                         nfs_strerror(mntres.nfsv2.fhs_status));
 724                         goto fail;
 725                 }
 726                 memcpy(data.root.data,
 727                        (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
 728                        NFS_FHSIZE);
 729 #if NFS_MOUNT_VERSION >= 4
 730                 data.root.size = NFS_FHSIZE;
 731                 memcpy(data.old_root.data,
 732                        (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
 733                        NFS_FHSIZE);
 734 #endif
 735         } else {
 736 #if NFS_MOUNT_VERSION >= 4
 737                 mountres3_ok *mountres;
 738                 fhandle3 *fhandle;
 739                 int i, *flavor, yum = 0;
 740                 if (mntres.nfsv3.fhs_status != 0) {
 741                         nfs_error(_("%s: %s:%s failed, reason given by server: %s"),
 742                                         progname, hostname, dirname,
 743                                         nfs_strerror(mntres.nfsv3.fhs_status));
 744                         goto fail;
 745                 }
 746 #if NFS_MOUNT_VERSION >= 5
 747                 mountres = &mntres.nfsv3.mountres3_u.mountinfo;
 748                 i = mountres->auth_flavors.auth_flavors_len;
 749                 if (i <= 0)
 750                         goto noauth_flavors;
 751
 752                 flavor = mountres->auth_flavors.auth_flavors_val;
 753                 while (--i >= 0) {
 754                         /* If no flavour requested, use first simple
 755                          * flavour that is offered.
 756                          */
 757                         if (! (data.flags & NFS_MOUNT_SECFLAVOUR) &&
 758                             (flavor[i] == AUTH_SYS ||
 759                              flavor[i] == AUTH_NONE)) {
 760                                 data.pseudoflavor = flavor[i];
 761                                 data.flags |= NFS_MOUNT_SECFLAVOUR;
 762                         }
 763                         if (flavor[i] == data.pseudoflavor)
 764                                 yum = 1;
 765 #ifdef NFS_MOUNT_DEBUG
 766                         printf("auth flavor %d: %d\n",
 767                                 i, flavor[i]);
 768 #endif
 769                 }
 770                 if (!yum) {
 771                         nfs_error(_("%s: %s:%s failed, security flavor "
 772                                         "not supported"),
 773                                         progname, hostname, dirname);
 774                         /* server has registered us in rmtab, send umount */
 775                         nfs_call_umount(&mnt_server, &dirname);
 776                         goto fail;
 777                 }
 778 noauth_flavors:
 779 #endif
 780                 fhandle = &mntres.nfsv3.mountres3_u.mountinfo.fhandle;
 781                 memset(data.old_root.data, 0, NFS_FHSIZE);
 782                 memset(&data.root, 0, sizeof(data.root));
 783                 data.root.size = fhandle->fhandle3_len;
 784                 memcpy(data.root.data,
 785                        (char *) fhandle->fhandle3_val,
 786                        fhandle->fhandle3_len);
 787
 788                 data.flags |= NFS_MOUNT_VER3;
 789 #endif
 790         }
 791
 792         if (nfs_mount_data_version == 1) {
 793                 /* create nfs socket for kernel */
 794                 if (nfs_pmap->pm_prot == IPPROTO_TCP)
 795                         fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 796                 else
 797                         fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 798                 if (fsock < 0) {
 799                         perror(_("nfs socket"));
 800                         goto fail;
 801                 }
 802                 if (bindresvport(fsock, 0) < 0) {
 803                         perror(_("nfs bindresvport"));
 804                         goto fail;
 805                 }
 806         }
 807
 808 #ifdef NFS_MOUNT_DEBUG
 809         printf(_("using port %d for nfs deamon\n"), nfs_pmap->pm_port);
 810 #endif
 811         nfs_saddr->sin_port = htons(nfs_pmap->pm_port);
 812         /*
 813          * connect() the socket for kernels 1.3.10 and below only,
 814          * to avoid problems with multihomed hosts.
 815          * --Swen
 816          */
 817         if (linux_version_code() <= 0x01030a && fsock != -1
 818             && connect(fsock, (struct sockaddr *) nfs_saddr,
 819                        sizeof (*nfs_saddr)) < 0) {
 820                 perror(_("nfs connect"));
 821                 goto fail;
 822         }
 823
 824 #if NFS_MOUNT_VERSION >= 2
 825         if (nfs_pmap->pm_prot == IPPROTO_TCP)
 826                 data.flags |= NFS_MOUNT_TCP;
 827         else
 828                 data.flags &= ~NFS_MOUNT_TCP;
 829 #endif
 830
 831         /* prepare data structure for kernel */
 832
 833         data.fd = fsock;
 834         memcpy((char *) &data.addr, (char *) nfs_saddr, sizeof(data.addr));
 835         strncpy(data.hostname, hostname, sizeof(data.hostname));
 836
 837  out_ok:
 838         /* Ensure we have enough padding for the following strcat()s */
 839         if (strlen(new_opts) + strlen(s) + 30 >= sizeof(new_opts)) {
 840                 nfs_error(_("%s: excessively long option argument"),
 841                                 progname);
 842                 goto fail;
 843         }
 844
 845         snprintf(cbuf, sizeof(cbuf)-1, "addr=%s", s);
 846         strcat(new_opts, cbuf);
 847
 848         *extra_opts = xstrdup(new_opts);
 849
 850         if (!fake && !(data.flags & NFS_MOUNT_NONLM)) {
 851                 if (!start_statd()) {
 852                         nfs_error(_("%s: rpc.statd is not running but is "
 853                                 "required for remote locking.\n"
 854                                 "   Either use '-o nolocks' to keep "
 855                                 "locks local, or start statd."),
 856                                         progname);
 857                         goto fail;
 858                 }
 859         }
 860
 861         if (!fake) {
 862                 if (mount(spec, node, "nfs",
 863                                 flags & ~(MS_USER|MS_USERS), &data)) {
 864                         mount_error(spec, node, errno);
 865                         goto fail;
 866                 }
 867         }
 868
 869         return 0;
 870
 871         /* abort */
 872  fail:
 873         if (fsock != -1)
 874                 close(fsock);
 875         return retval;
 876 }