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 char *progname;
  93 extern int verbose;
  94 extern int sloppy;
  95
  96 extern int linux_version_code(void);
  97
  98 static inline enum clnt_stat
  99 nfs3_mount(CLIENT *clnt, mnt3arg_t *mnt3arg, mnt3res_t *mnt3res)
 100 {
 101         return clnt_call(clnt, MOUNTPROC3_MNT,
 102                          (xdrproc_t) xdr_dirpath, (caddr_t) mnt3arg,
 103                          (xdrproc_t) xdr_mountres3, (caddr_t) mnt3res,
 104                          TIMEOUT);
 105 }
 106
 107 static inline enum clnt_stat
 108 nfs2_mount(CLIENT *clnt, mnt2arg_t *mnt2arg, mnt2res_t *mnt2res)
 109 {
 110         return clnt_call(clnt, MOUNTPROC_MNT,
 111                          (xdrproc_t) xdr_dirpath, (caddr_t) mnt2arg,
 112                          (xdrproc_t) xdr_fhstatus, (caddr_t) mnt2res,
 113                          TIMEOUT);
 114 }
 115
 116 static int
 117 nfs_call_mount(clnt_addr_t *mnt_server, clnt_addr_t *nfs_server,
 118                mntarg_t *mntarg, mntres_t *mntres)
 119 {
 120         CLIENT *clnt;
 121         enum clnt_stat stat;
 122         int msock;
 123
 124         if (!probe_bothports(mnt_server, nfs_server))
 125                 goto out_bad;
 126
 127         clnt = mnt_openclnt(mnt_server, &msock);
 128         if (!clnt)
 129                 goto out_bad;
 130         /* make pointers in xdr_mountres3 NULL so
 131          * that xdr_array allocates memory for us
 132          */
 133         memset(mntres, 0, sizeof(*mntres));
 134         switch (mnt_server->pmap.pm_vers) {
 135         case 3:
 136                 stat = nfs3_mount(clnt, mntarg, &mntres->nfsv3);
 137                 break;
 138         case 2:
 139         case 1:
 140                 stat = nfs2_mount(clnt, mntarg, &mntres->nfsv2);
 141                 break;
 142         default:
 143                 goto out_bad;
 144         }
 145         if (stat != RPC_SUCCESS) {
 146                 clnt_geterr(clnt, &rpc_createerr.cf_error);
 147                 rpc_createerr.cf_stat = stat;
 148         }
 149         mnt_closeclnt(clnt, msock);
 150         if (stat == RPC_SUCCESS)
 151                 return 1;
 152  out_bad:
 153         return 0;
 154 }
 155
 156 static int
 157 parse_options(char *old_opts, struct nfs_mount_data *data,
 158               int *bg, int *retry, clnt_addr_t *mnt_server,
 159               clnt_addr_t *nfs_server, char *new_opts, const int opt_size)
 160 {
 161         struct sockaddr_in *mnt_saddr = &mnt_server->saddr;
 162         struct pmap *mnt_pmap = &mnt_server->pmap;
 163         struct pmap *nfs_pmap = &nfs_server->pmap;
 164         int len;
 165         char *opt, *opteq, *p, *opt_b;
 166         char *mounthost = NULL;
 167         char cbuf[128];
 168         int open_quote = 0;
 169
 170         data->flags = 0;
 171         *bg = 0;
 172
 173         len = strlen(new_opts);
 174         for (p=old_opts, opt_b=NULL; p && *p; p++) {
 175                 if (!opt_b)
 176                         opt_b = p;              /* begin of the option item */
 177                 if (*p == '"')
 178                         open_quote ^= 1;        /* reverse the status */
 179                 if (open_quote)
 180                         continue;               /* still in a quoted block */
 181                 if (*p == ',')
 182                         *p = '\0';              /* terminate the option item */
 183                 if (*p == '\0' || *(p+1) == '\0') {
 184                         opt = opt_b;            /* opt is useful now */
 185                         opt_b = NULL;
 186                 }
 187                 else
 188                         continue;               /* still somewhere in the option item */
 189
 190                 if (strlen(opt) >= sizeof(cbuf))
 191                         goto bad_parameter;
 192                 if ((opteq = strchr(opt, '=')) && isdigit(opteq[1])) {
 193                         int val = atoi(opteq + 1);
 194                         *opteq = '\0';
 195 /* printf("opt=%s\n", opt); */
 196                         if (!strcmp(opt, "rsize"))
 197                                 data->rsize = val;
 198                         else if (!strcmp(opt, "wsize"))
 199                                 data->wsize = val;
 200                         else if (!strcmp(opt, "timeo"))
 201                                 data->timeo = val;
 202                         else if (!strcmp(opt, "retrans"))
 203                                 data->retrans = val;
 204                         else if (!strcmp(opt, "acregmin"))
 205                                 data->acregmin = val;
 206                         else if (!strcmp(opt, "acregmax"))
 207                                 data->acregmax = val;
 208                         else if (!strcmp(opt, "acdirmin"))
 209                                 data->acdirmin = val;
 210                         else if (!strcmp(opt, "acdirmax"))
 211                                 data->acdirmax = val;
 212                         else if (!strcmp(opt, "actimeo")) {
 213                                 data->acregmin = val;
 214                                 data->acregmax = val;
 215                                 data->acdirmin = val;
 216                                 data->acdirmax = val;
 217                         }
 218                         else if (!strcmp(opt, "retry"))
 219                                 *retry = val;
 220                         else if (!strcmp(opt, "port"))
 221                                 nfs_pmap->pm_port = val;
 222                         else if (!strcmp(opt, "mountport"))
 223                                 mnt_pmap->pm_port = val;
 224                         else if (!strcmp(opt, "mountprog"))
 225                                 mnt_pmap->pm_prog = val;
 226                         else if (!strcmp(opt, "mountvers"))
 227                                 mnt_pmap->pm_vers = val;
 228                         else if (!strcmp(opt, "mounthost"))
 229                                 mounthost=xstrndup(opteq+1, strcspn(opteq+1," \t\n\r,"));
 230                         else if (!strcmp(opt, "nfsprog"))
 231                                 nfs_pmap->pm_prog = val;
 232                         else if (!strcmp(opt, "nfsvers") ||
 233                                  !strcmp(opt, "vers")) {
 234                                 nfs_pmap->pm_vers = val;
 235                                 opt = "nfsvers";
 236 #if NFS_MOUNT_VERSION >= 2
 237                         } else if (!strcmp(opt, "namlen")) {
 238                                 if (nfs_mount_data_version >= 2)
 239                                         data->namlen = val;
 240                                 else if (sloppy)
 241                                         continue;
 242                                 else
 243                                         goto bad_parameter;
 244 #endif
 245                         } else if (!strcmp(opt, "addr")) {
 246                                 /* ignore */;
 247                                 continue;
 248                         } else if (sloppy)
 249                                 continue;
 250                         else
 251                                 goto bad_parameter;
 252                         sprintf(cbuf, "%s=%s,", opt, opteq+1);
 253                 } else if (opteq) {
 254                         *opteq = '\0';
 255                         if (!strcmp(opt, "proto")) {
 256                                 if (!strcmp(opteq+1, "udp")) {
 257                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 258                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 259 #if NFS_MOUNT_VERSION >= 2
 260                                         data->flags &= ~NFS_MOUNT_TCP;
 261                                 } else if (!strcmp(opteq+1, "tcp") &&
 262                                            nfs_mount_data_version > 2) {
 263                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 264                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 265                                         data->flags |= NFS_MOUNT_TCP;
 266 #endif
 267                                 } else if (sloppy)
 268                                         continue;
 269                                 else
 270                                         goto bad_parameter;
 271 #if NFS_MOUNT_VERSION >= 5
 272                         } else if (!strcmp(opt, "sec")) {
 273                                 char *secflavor = opteq+1;
 274                                 /* see RFC 2623 */
 275                                 if (nfs_mount_data_version < 5) {
 276                                         printf(_("Warning: ignoring sec=%s option\n"), secflavor);
 277                                         continue;
 278                                 } else if (!strcmp(secflavor, "none"))
 279                                         data->pseudoflavor = AUTH_NONE;
 280                                 else if (!strcmp(secflavor, "sys"))
 281                                         data->pseudoflavor = AUTH_SYS;
 282                                 else if (!strcmp(secflavor, "krb5"))
 283                                         data->pseudoflavor = AUTH_GSS_KRB5;
 284                                 else if (!strcmp(secflavor, "krb5i"))
 285                                         data->pseudoflavor = AUTH_GSS_KRB5I;
 286                                 else if (!strcmp(secflavor, "krb5p"))
 287                                         data->pseudoflavor = AUTH_GSS_KRB5P;
 288                                 else if (!strcmp(secflavor, "lipkey"))
 289                                         data->pseudoflavor = AUTH_GSS_LKEY;
 290                                 else if (!strcmp(secflavor, "lipkey-i"))
 291                                         data->pseudoflavor = AUTH_GSS_LKEYI;
 292                                 else if (!strcmp(secflavor, "lipkey-p"))
 293                                         data->pseudoflavor = AUTH_GSS_LKEYP;
 294                                 else if (!strcmp(secflavor, "spkm3"))
 295                                         data->pseudoflavor = AUTH_GSS_SPKM;
 296                                 else if (!strcmp(secflavor, "spkm3i"))
 297                                         data->pseudoflavor = AUTH_GSS_SPKMI;
 298                                 else if (!strcmp(secflavor, "spkm3p"))
 299                                         data->pseudoflavor = AUTH_GSS_SPKMP;
 300                                 else if (sloppy)
 301                                         continue;
 302                                 else {
 303                                         printf(_("Warning: Unrecognized security flavor %s.\n"),
 304                                                 secflavor);
 305                                         goto bad_parameter;
 306                                 }
 307                                 data->flags |= NFS_MOUNT_SECFLAVOUR;
 308 #endif
 309                         } else if (!strcmp(opt, "mounthost"))
 310                                 mounthost=xstrndup(opteq+1,
 311                                                    strcspn(opteq+1," \t\n\r,"));
 312                          else if (!strcmp(opt, "context")) {
 313                                 char *context = opteq + 1;
 314                                 int ctxlen = strlen(context);
 315
 316                                 if (ctxlen > NFS_MAX_CONTEXT_LEN) {
 317                                         printf(_("context parameter exceeds limit of %d\n"),
 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                                 printf(_("Unsupported nfs mount option: "
 431                                          "%s%s\n"), 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                         printf(_("mount: excessively long option argument\n"));
 439                         goto out_bad;
 440                 }
 441                 strcat(new_opts, cbuf);
 442         }
 443         /* See if the nfs host = mount host. */
 444         if (mounthost) {
 445                 if (!nfs_gethostbyname(mounthost, mnt_saddr))
 446                         goto out_bad;
 447                 *mnt_server->hostname = mounthost;
 448         }
 449         return 1;
 450  bad_parameter:
 451         printf(_("Bad nfs mount parameter: %s\n"), opt);
 452  out_bad:
 453         return 0;
 454 }
 455
 456 static int nfsmnt_check_compat(const struct pmap *nfs_pmap,
 457                                 const struct pmap *mnt_pmap)
 458 {
 459         unsigned int max_nfs_vers = (nfs_mount_data_version >= 4) ? 3 : 2;
 460         unsigned int max_mnt_vers = (nfs_mount_data_version >= 4) ? 3 : 2;
 461
 462         if (nfs_pmap->pm_vers == 4) {
 463                 nfs_error(_("%s: Please use '-t nfs4' "
 464                                 "instead of '-o vers=4'"), progname);
 465                 goto out_bad;
 466         }
 467
 468         if (nfs_pmap->pm_vers) {
 469                 if (nfs_pmap->pm_vers > max_nfs_vers || nfs_pmap->pm_vers < 2) {
 470                         nfs_error(_("%s: NFS version %ld is not supported"),
 471                                         progname, nfs_pmap->pm_vers);
 472                         goto out_bad;
 473                 }
 474         }
 475
 476         if (mnt_pmap->pm_vers > max_mnt_vers) {
 477                 nfs_error(_("%s: NFS mount version %ld s not supported"),
 478                                 progname, mnt_pmap->pm_vers);
 479                 goto out_bad;
 480         }
 481
 482         return 1;
 483
 484 out_bad:
 485         return 0;
 486 }
 487
 488 int
 489 nfsmount(const char *spec, const char *node, int flags,
 490          char **extra_opts, int fake)
 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, running_bg = 0;
 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                 nfs_error(_("%s: excessively long host:dir argument"),
 521                                 progname);
 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                         nfs_error(_("%s: warning: "
 534                                   "multiple hostnames not supported"),
 535                                         progname);
 536                 }
 537         } else {
 538                 nfs_error(_("%s: directory to mount not in host:dir format"),
 539                                 progname);
 540                 goto fail;
 541         }
 542
 543         if (!nfs_gethostbyname(hostname, nfs_saddr))
 544                 goto fail;
 545         mounthost = hostname;
 546         memcpy (&mnt_server.saddr, nfs_saddr, sizeof (mnt_server.saddr));
 547
 548         /* add IP address to mtab options for use when unmounting */
 549
 550         s = inet_ntoa(nfs_saddr->sin_addr);
 551         old_opts = *extra_opts;
 552         if (!old_opts)
 553                 old_opts = "";
 554
 555         /* Set default options.
 556          * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
 557          * let the kernel decide.
 558          * timeo is filled in after we know whether it'll be TCP or UDP. */
 559         memset(&data, 0, sizeof(data));
 560         data.acregmin   = 3;
 561         data.acregmax   = 60;
 562         data.acdirmin   = 30;
 563         data.acdirmax   = 60;
 564 #if NFS_MOUNT_VERSION >= 2
 565         data.namlen     = NAME_MAX;
 566 #endif
 567
 568         bg = 0;
 569         retry = 10000;          /* 10000 minutes ~ 1 week */
 570
 571         memset(mnt_pmap, 0, sizeof(*mnt_pmap));
 572         mnt_pmap->pm_prog = MOUNTPROG;
 573         memset(nfs_pmap, 0, sizeof(*nfs_pmap));
 574         nfs_pmap->pm_prog = NFS_PROGRAM;
 575
 576         /* parse options */
 577         new_opts[0] = 0;
 578         if (!parse_options(old_opts, &data, &bg, &retry, &mnt_server, &nfs_server,
 579                            new_opts, sizeof(new_opts)))
 580                 goto fail;
 581         if (!nfsmnt_check_compat(nfs_pmap, mnt_pmap))
 582                 goto fail;
 583
 584         if (retry == 10000 && !bg)
 585                 retry = 2; /* reset for fg mounts */
 586
 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 = %d, bg = %d, retry = %d, flags = %.8x\n",
 594                nfs_pmap->pm_port, bg, retry, data.flags);
 595         printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\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                                 mount_errors(*nfs_server.hostname, 0, bg);
 692                         goto fail;
 693                         }
 694                         t = time(NULL);
 695                         if (t >= timeout) {
 696                                 mount_errors(*nfs_server.hostname, 0, bg);
 697                                 goto fail;
 698                         }
 699                         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                         mount_errors(*nfs_server.hostname, 0, bg);
 711                         goto fail;
 712                 }
 713                 if (doonce++ < 1)
 714                         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",
 765                                 i, flavor[i]);
 766 #endif
 767                 }
 768                 if (!yum) {
 769                         nfs_error(_("%s: %s:%s failed, security flavor "
 770                                         "not supported"),
 771                                         progname, hostname, dirname);
 772                         /* server has registered us in rmtab, send umount */
 773                         nfs_call_umount(&mnt_server, &dirname);
 774                         goto fail;
 775                 }
 776 noauth_flavors:
 777 #endif
 778                 fhandle = &mntres.nfsv3.mountres3_u.mountinfo.fhandle;
 779                 memset(data.old_root.data, 0, NFS_FHSIZE);
 780                 memset(&data.root, 0, sizeof(data.root));
 781                 data.root.size = fhandle->fhandle3_len;
 782                 memcpy(data.root.data,
 783                        (char *) fhandle->fhandle3_val,
 784                        fhandle->fhandle3_len);
 785
 786                 data.flags |= NFS_MOUNT_VER3;
 787 #endif
 788         }
 789
 790         if (nfs_mount_data_version == 1) {
 791                 /* create nfs socket for kernel */
 792                 if (nfs_pmap->pm_prot == IPPROTO_TCP)
 793                         fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 794                 else
 795                         fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 796                 if (fsock < 0) {
 797                         perror(_("nfs socket"));
 798                         goto fail;
 799                 }
 800                 if (bindresvport(fsock, 0) < 0) {
 801                         perror(_("nfs bindresvport"));
 802                         goto fail;
 803                 }
 804         }
 805
 806 #ifdef NFS_MOUNT_DEBUG
 807         printf(_("using port %d for nfs deamon\n"), nfs_pmap->pm_port);
 808 #endif
 809         nfs_saddr->sin_port = htons(nfs_pmap->pm_port);
 810         /*
 811          * connect() the socket for kernels 1.3.10 and below only,
 812          * to avoid problems with multihomed hosts.
 813          * --Swen
 814          */
 815         if (linux_version_code() <= 0x01030a && fsock != -1
 816             && connect(fsock, (struct sockaddr *) nfs_saddr,
 817                        sizeof (*nfs_saddr)) < 0) {
 818                 perror(_("nfs connect"));
 819                 goto fail;
 820         }
 821
 822 #if NFS_MOUNT_VERSION >= 2
 823         if (nfs_pmap->pm_prot == IPPROTO_TCP)
 824                 data.flags |= NFS_MOUNT_TCP;
 825         else
 826                 data.flags &= ~NFS_MOUNT_TCP;
 827 #endif
 828
 829         /* prepare data structure for kernel */
 830
 831         data.fd = fsock;
 832         memcpy((char *) &data.addr, (char *) nfs_saddr, sizeof(data.addr));
 833         strncpy(data.hostname, hostname, sizeof(data.hostname));
 834
 835  out_ok:
 836         /* Ensure we have enough padding for the following strcat()s */
 837         if (strlen(new_opts) + strlen(s) + 30 >= sizeof(new_opts)) {
 838                 nfs_error(_("%s: excessively long option argument"),
 839                                 progname);
 840                 goto fail;
 841         }
 842
 843         snprintf(cbuf, sizeof(cbuf)-1, "addr=%s", s);
 844         strcat(new_opts, cbuf);
 845
 846         *extra_opts = xstrdup(new_opts);
 847
 848         if (!fake && !(data.flags & NFS_MOUNT_NONLM)) {
 849                 if (!start_statd()) {
 850                         nfs_error(_("%s: rpc.statd is not running but is "
 851                                 "required for remote locking.\n"
 852                                 "   Either use '-o nolocks' to keep "
 853                                 "locks local, or start statd."),
 854                                         progname);
 855                         goto fail;
 856                 }
 857         }
 858
 859         if (!fake) {
 860                 if (mount(spec, node, "nfs",
 861                                 flags & ~(MS_USER|MS_USERS), &data)) {
 862                         mount_error(spec, node, errno);
 863                         goto fail;
 864                 }
 865         }
 866
 867         return 0;
 868
 869         /* abort */
 870  fail:
 871         if (fsock != -1)
 872                 close(fsock);
 873         return retval;
 874 }