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 "nfsumount.h"
  63 #include "nfs_mount.h"
  64 #include "mount_constants.h"
  65 #include "nls.h"
  66 #include "error.h"
  67 #include "network.h"
  68
  69 #ifndef NFS_PORT
  70 #define NFS_PORT 2049
  71 #endif
  72 #ifndef NFS_FHSIZE
  73 #define NFS_FHSIZE 32
  74 #endif
  75
  76 #ifndef HAVE_INET_ATON
  77 #define inet_aton(a,b) (0)
  78 #endif
  79
  80 typedef dirpath mnt2arg_t;
  81 typedef dirpath mnt3arg_t;
  82 typedef dirpath mntarg_t;
  83
  84 typedef struct fhstatus  mnt2res_t;
  85 typedef struct mountres3 mnt3res_t;
  86 typedef union {
  87         mnt2res_t nfsv2;
  88         mnt3res_t nfsv3;
  89 } mntres_t;
  90
  91 extern int nfs_mount_data_version;
  92 extern int verbose;
  93 extern int sloppy;
  94
  95 extern int linux_version_code();
  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"), 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                                         printf(_("context parameter exceeds limit of %d\n"),
 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                                 printf(_("Unsupported nfs mount option: "
 430                                          "%s%s\n"), val ? "" : "no", opt);
 431                                 goto out_bad;
 432                         }
 433                         sprintf(cbuf, val ? "%s,":"no%s,", opt);
 434                 }
 435                 len += strlen(cbuf);
 436                 if (len >= opt_size) {
 437                         printf(_("mount: excessively long option argument\n"));
 438                         goto out_bad;
 439                 }
 440                 strcat(new_opts, cbuf);
 441         }
 442         /* See if the nfs host = mount host. */
 443         if (mounthost) {
 444                 if (!nfs_gethostbyname(mounthost, mnt_saddr))
 445                         goto out_bad;
 446                 *mnt_server->hostname = mounthost;
 447         }
 448         return 1;
 449  bad_parameter:
 450         printf(_("Bad nfs mount parameter: %s\n"), opt);
 451  out_bad:
 452         return 0;
 453 }
 454
 455 static int nfsmnt_check_compat(const struct pmap *nfs_pmap,
 456                                 const struct pmap *mnt_pmap)
 457 {
 458         unsigned int max_nfs_vers = (nfs_mount_data_version >= 4) ? 3 : 2;
 459         unsigned int max_mnt_vers = (nfs_mount_data_version >= 4) ? 3 : 2;
 460
 461         if (nfs_pmap->pm_vers == 4) {
 462                 fprintf(stderr, _("Please use '-t nfs4' "
 463                                         "instead of '-o vers=4'.\n"));
 464                 goto out_bad;
 465         }
 466
 467         if (nfs_pmap->pm_vers) {
 468                 if (nfs_pmap->pm_vers > max_nfs_vers || nfs_pmap->pm_vers < 2) {
 469                         fprintf(stderr, _("NFS version %ld is not supported.\n"),
 470                                         nfs_pmap->pm_vers);
 471                         goto out_bad;
 472                 }
 473         }
 474
 475         if (mnt_pmap->pm_vers > max_mnt_vers) {
 476                 fprintf(stderr, _("NFS mount version %ld s not supported.\n"),
 477                         mnt_pmap->pm_vers);
 478                 goto out_bad;
 479         }
 480
 481         return 1;
 482
 483 out_bad:
 484         return 0;
 485 }
 486
 487 int
 488 nfsmount(const char *spec, const char *node, int *flags,
 489          char **extra_opts, char **mount_opts,
 490          int running_bg, int *need_statd)
 491 {
 492         static char *prev_bg_host;
 493         char hostdir[1024];
 494         char *hostname, *dirname, *old_opts, *mounthost = NULL;
 495         char new_opts[1024], cbuf[1024];
 496         static struct nfs_mount_data data;
 497         int val;
 498         static int doonce = 0;
 499
 500         clnt_addr_t mnt_server = { &mounthost, };
 501         clnt_addr_t nfs_server = { &hostname, };
 502         struct sockaddr_in *nfs_saddr = &nfs_server.saddr;
 503         struct pmap  *mnt_pmap = &mnt_server.pmap,
 504                      *nfs_pmap = &nfs_server.pmap;
 505         struct pmap  save_mnt, save_nfs;
 506
 507         int fsock = -1;
 508
 509         mntres_t mntres;
 510
 511         struct stat statbuf;
 512         char *s;
 513         int bg, retry;
 514         int retval = EX_FAIL;
 515         time_t t;
 516         time_t prevt;
 517         time_t timeout;
 518
 519         if (strlen(spec) >= sizeof(hostdir)) {
 520                 fprintf(stderr, _("mount: "
 521                                   "excessively long host:dir argument\n"));
 522                 goto fail;
 523         }
 524         strcpy(hostdir, spec);
 525         if ((s = strchr(hostdir, ':'))) {
 526                 hostname = hostdir;
 527                 dirname = s + 1;
 528                 *s = '\0';
 529                 /* Ignore all but first hostname in replicated mounts
 530                    until they can be fully supported. (mack@sgi.com) */
 531                 if ((s = strchr(hostdir, ','))) {
 532                         *s = '\0';
 533                         fprintf(stderr,
 534                                 _("mount: warning: "
 535                                   "multiple hostnames not supported\n"));
 536                 }
 537         } else {
 538                 fprintf(stderr,
 539                         _("mount: "
 540                           "directory to mount not in host:dir format\n"));
 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
 589 #ifdef NFS_MOUNT_DEBUG
 590         printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n",
 591                data.rsize, data.wsize, data.timeo, data.retrans);
 592         printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n",
 593                data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
 594         printf("port = %d, bg = %d, retry = %d, flags = %.8x\n",
 595                nfs_pmap->pm_port, bg, retry, data.flags);
 596         printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n",
 597                mnt_pmap->pm_prog, mnt_pmap->pm_vers,
 598                nfs_pmap->pm_prog, nfs_pmap->pm_vers);
 599         printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d ",
 600                (data.flags & NFS_MOUNT_SOFT) != 0,
 601                (data.flags & NFS_MOUNT_INTR) != 0,
 602                (data.flags & NFS_MOUNT_POSIX) != 0,
 603                (data.flags & NFS_MOUNT_NOCTO) != 0,
 604                (data.flags & NFS_MOUNT_NOAC) != 0);
 605 #if NFS_MOUNT_VERSION >= 2
 606         printf("tcp = %d ",
 607                (data.flags & NFS_MOUNT_TCP) != 0);
 608 #endif
 609 #if NFS_MOUNT_VERSION >= 4
 610         printf("noacl = %d ", (data.flags & NFS_MOUNT_NOACL) != 0);
 611 #endif
 612 #if NFS_MOUNT_VERSION >= 5
 613         printf("sec = %u ", data.pseudoflavor);
 614         printf("readdirplus = %d ", (data.flags & NFS_MOUNT_NORDIRPLUS) != 0);
 615 #endif
 616         printf("\n");
 617 #endif
 618
 619         data.version = nfs_mount_data_version;
 620         *mount_opts = (char *) &data;
 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                         fprintf(stderr,
 722                                 _("mount: %s:%s failed, reason given by server: %s\n"),
 723                                 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                         fprintf(stderr,
 743                                 _("mount: %s:%s failed, reason given by server: %s\n"),
 744                                 hostname, dirname,
 745                                 nfs_strerror(mntres.nfsv3.fhs_status));
 746                         goto fail;
 747                 }
 748 #if NFS_MOUNT_VERSION >= 5
 749                 mountres = &mntres.nfsv3.mountres3_u.mountinfo;
 750                 i = mountres->auth_flavors.auth_flavors_len;
 751                 if (i <= 0)
 752                         goto noauth_flavors;
 753
 754                 flavor = mountres->auth_flavors.auth_flavors_val;
 755                 while (--i >= 0) {
 756                         /* If no flavour requested, use first simple
 757                          * flavour that is offered.
 758                          */
 759                         if (! (data.flags & NFS_MOUNT_SECFLAVOUR) &&
 760                             (flavor[i] == AUTH_SYS ||
 761                              flavor[i] == AUTH_NONE)) {
 762                                 data.pseudoflavor = flavor[i];
 763                                 data.flags |= NFS_MOUNT_SECFLAVOUR;
 764                         }
 765                         if (flavor[i] == data.pseudoflavor)
 766                                 yum = 1;
 767 #ifdef NFS_MOUNT_DEBUG
 768                         printf("auth flavor %d: %d\n",
 769                                 i, flavor[i]);
 770 #endif
 771                 }
 772                 if (!yum) {
 773                         fprintf(stderr,
 774                                 "mount: %s:%s failed, "
 775                                 "security flavor not supported\n",
 776                                 hostname, dirname);
 777                         /* server has registered us in rmtab, send umount */
 778                         nfs_call_umount(&mnt_server, &dirname);
 779                         goto fail;
 780                 }
 781 noauth_flavors:
 782 #endif
 783                 fhandle = &mntres.nfsv3.mountres3_u.mountinfo.fhandle;
 784                 memset(data.old_root.data, 0, NFS_FHSIZE);
 785                 memset(&data.root, 0, sizeof(data.root));
 786                 data.root.size = fhandle->fhandle3_len;
 787                 memcpy(data.root.data,
 788                        (char *) fhandle->fhandle3_val,
 789                        fhandle->fhandle3_len);
 790
 791                 data.flags |= NFS_MOUNT_VER3;
 792 #endif
 793         }
 794
 795         if (nfs_mount_data_version == 1) {
 796                 /* create nfs socket for kernel */
 797                 if (nfs_pmap->pm_prot == IPPROTO_TCP)
 798                         fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 799                 else
 800                         fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 801                 if (fsock < 0) {
 802                         perror(_("nfs socket"));
 803                         goto fail;
 804                 }
 805                 if (bindresvport(fsock, 0) < 0) {
 806                         perror(_("nfs bindresvport"));
 807                         goto fail;
 808                 }
 809         }
 810
 811 #ifdef NFS_MOUNT_DEBUG
 812         printf(_("using port %d for nfs deamon\n"), nfs_pmap->pm_port);
 813 #endif
 814         nfs_saddr->sin_port = htons(nfs_pmap->pm_port);
 815         /*
 816          * connect() the socket for kernels 1.3.10 and below only,
 817          * to avoid problems with multihomed hosts.
 818          * --Swen
 819          */
 820         if (linux_version_code() <= 0x01030a && fsock != -1
 821             && connect(fsock, (struct sockaddr *) nfs_saddr,
 822                        sizeof (*nfs_saddr)) < 0) {
 823                 perror(_("nfs connect"));
 824                 goto fail;
 825         }
 826
 827 #if NFS_MOUNT_VERSION >= 2
 828         if (nfs_pmap->pm_prot == IPPROTO_TCP)
 829                 data.flags |= NFS_MOUNT_TCP;
 830         else
 831                 data.flags &= ~NFS_MOUNT_TCP;
 832 #endif
 833
 834         /* prepare data structure for kernel */
 835
 836         data.fd = fsock;
 837         memcpy((char *) &data.addr, (char *) nfs_saddr, sizeof(data.addr));
 838         strncpy(data.hostname, hostname, sizeof(data.hostname));
 839
 840  out_ok:
 841         /* Ensure we have enough padding for the following strcat()s */
 842         if (strlen(new_opts) + strlen(s) + 30 >= sizeof(new_opts)) {
 843                 fprintf(stderr, _("mount: "
 844                                   "excessively long option argument\n"));
 845                 goto fail;
 846         }
 847
 848         snprintf(cbuf, sizeof(cbuf)-1, "addr=%s", s);
 849         strcat(new_opts, cbuf);
 850
 851         *extra_opts = xstrdup(new_opts);
 852         *need_statd = ! (data.flags & NFS_MOUNT_NONLM);
 853         return 0;
 854
 855         /* abort */
 856  fail:
 857         if (fsock != -1)
 858                 close(fsock);
 859         return retval;
 860 }