net/nfs.c

   1 /*
   2  * NFS support driver - based on etherboot and U-BOOT's tftp.c
   3  *
   4  * Masami Komiya <mkomiya@sonare.it> 2004
   5  *
   6  */
   7
   8 /* NOTE: the NFS code is heavily inspired by the NetBSD netboot code (read:
   9  * large portions are copied verbatim) as distributed in OSKit 0.97.  A few
  10  * changes were necessary to adapt the code to Etherboot and to fix several
  11  * inconsistencies.  Also the RPC message preparation is done "by hand" to
  12  * avoid adding netsprintf() which I find hard to understand and use.  */
  13
  14 /* NOTE 2: Etherboot does not care about things beyond the kernel image, so
  15  * it loads the kernel image off the boot server (ARP_SERVER) and does not
  16  * access the client root disk (root-path in dhcpd.conf), which would use
  17  * ARP_ROOTSERVER.  The root disk is something the operating system we are
  18  * about to load needs to use.  This is different from the OSKit 0.97 logic.  */
  19
  20 /* NOTE 3: Symlink handling introduced by Anselm M Hoffmeister, 2003-July-14
  21  * If a symlink is encountered, it is followed as far as possible (recursion
  22  * possible, maximum 16 steps). There is no clearing of ".."'s inside the
  23  * path, so please DON'T DO THAT. thx. */
  24
  25 #include <common.h>
  26 #include <command.h>
  27 #include <net.h>
  28 #include <malloc.h>
  29 #include "nfs.h"
  30 #include "bootp.h"
  31
  32 /*#define NFS_DEBUG*/
  33
  34 #if ((CONFIG_COMMANDS & CFG_CMD_NET) && (CONFIG_COMMANDS & CFG_CMD_NFS))
  35
  36 #define HASHES_PER_LINE 65      /* Number of "loading" hashes per line  */
  37 #define NFS_TIMEOUT 10
  38
  39 static int fs_mounted = 0;
  40 static unsigned long rpc_id;
  41 static int nfs_offset = -1;
  42 static int nfs_len;
  43
  44 static char dirfh[NFS_FHSIZE];  /* file handle of directory */
  45 static char filefh[NFS_FHSIZE]; /* file handle of kernel image */
  46
  47 static IPaddr_t NfsServerIP;
  48 static int      NfsSrvMountPort;
  49 static int      NfsSrvNfsPort;
  50 static int      NfsOurPort;
  51 static int      NfsTimeoutCount;
  52 static int      NfsState;
  53 #define STATE_PRCLOOKUP_PROG_MOUNT_REQ  1
  54 #define STATE_PRCLOOKUP_PROG_NFS_REQ    2
  55 #define STATE_MOUNT_REQ                 3
  56 #define STATE_UMOUNT_REQ                4
  57 #define STATE_LOOKUP_REQ                5
  58 #define STATE_READ_REQ                  6
  59 #define STATE_READLINK_REQ              7
  60
  61 static char default_filename[64];
  62 static char *nfs_filename;
  63 static char *nfs_path;
  64 static char nfs_path_buff[2048];
  65
  66 static __inline__ void
  67 store_block (uchar * src, unsigned offset, unsigned len)
  68 {
  69         ulong newsize = offset + len;
  70 #ifdef CFG_DIRECT_FLASH_NFS
  71         int i, rc = 0;
  72
  73         for (i=0; i<CFG_MAX_FLASH_BANKS; i++) {
  74                 /* start address in flash? */
  75                 if (load_addr + offset >= flash_info[i].start[0]) {
  76                         rc = 1;
  77                         break;
  78                 }
  79         }
  80
  81         if (rc) { /* Flash is destination for this packet */
  82                 rc = flash_write ((uchar *)src, (ulong)(load_addr+offset), len);
  83                 if (rc) {
  84                         flash_perror (rc);
  85                         NetState = NETLOOP_FAIL;
  86                         return;
  87                 }
  88         } else
  89 #endif /* CFG_DIRECT_FLASH_NFS */
  90         {
  91                 (void)memcpy ((void *)(load_addr + offset), src, len);
  92         }
  93
  94         if (NetBootFileXferSize < (offset+len))
  95                 NetBootFileXferSize = newsize;
  96 }
  97
  98 static char*
  99 basename (char *path)
 100 {
 101         char *fname;
 102
 103         fname = path + strlen(path) - 1;
 104         while (fname >= path) {
 105                 if (*fname == '/') {
 106                         fname++;
 107                         break;
 108                 }
 109                 fname--;
 110         }
 111         return fname;
 112 }
 113
 114 static char*
 115 dirname (char *path)
 116 {
 117         char *fname;
 118
 119         fname = basename (path);
 120         --fname;
 121         *fname = '\0';
 122         return path;
 123 }
 124
 125 /**************************************************************************
 126 RPC_INIT - set up the ID counter to something fairly random
 127 **************************************************************************/
 128 static void
 129 rpc_init (void)
 130 {
 131         unsigned long t;
 132         t=get_ticks();
 133         rpc_id = t ^ (t << 8) ^ (t << 16);
 134 }
 135
 136 /**************************************************************************
 137 RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
 138 **************************************************************************/
 139 static long *rpc_add_credentials (long *p)
 140 {
 141         int hl;
 142         int hostnamelen;
 143         char hostname[256];
 144
 145         strcpy (hostname, "");
 146         hostnamelen=strlen (hostname);
 147
 148         /* Here's the executive summary on authentication requirements of the
 149          * various NFS server implementations:  Linux accepts both AUTH_NONE
 150          * and AUTH_UNIX authentication (also accepts an empty hostname field
 151          * in the AUTH_UNIX scheme).  *BSD refuses AUTH_NONE, but accepts
 152          * AUTH_UNIX (also accepts an empty hostname field in the AUTH_UNIX
 153          * scheme).  To be safe, use AUTH_UNIX and pass the hostname if we have
 154          * it (if the BOOTP/DHCP reply didn't give one, just use an empty
 155          * hostname).  */
 156
 157         hl = (hostnamelen + 3) & ~3;
 158
 159         /* Provide an AUTH_UNIX credential.  */
 160         *p++ = htonl(1);                /* AUTH_UNIX */
 161         *p++ = htonl(hl+20);            /* auth length */
 162         *p++ = htonl(0);                /* stamp */
 163         *p++ = htonl(hostnamelen);      /* hostname string */
 164         if (hostnamelen & 3) {
 165                 *(p + hostnamelen / 4) = 0; /* add zero padding */
 166         }
 167         memcpy (p, hostname, hostnamelen);
 168         p += hl / 4;
 169         *p++ = 0;                       /* uid */
 170         *p++ = 0;                       /* gid */
 171         *p++ = 0;                       /* auxiliary gid list */
 172
 173         /* Provide an AUTH_NONE verifier.  */
 174         *p++ = 0;                       /* AUTH_NONE */
 175         *p++ = 0;                       /* auth length */
 176
 177         return p;
 178 }
 179
 180 /**************************************************************************
 181 RPC_LOOKUP - Lookup RPC Port numbers
 182 **************************************************************************/
 183 static void
 184 rpc_req (int rpc_prog, int rpc_proc, uint32_t *data, int datalen)
 185 {
 186         struct rpc_t pkt;
 187         unsigned long id;
 188         uint32_t *p;
 189         int pktlen;
 190         int sport;
 191
 192         id = rpc_id++;
 193         pkt.u.call.id = htonl(id);
 194         pkt.u.call.type = htonl(MSG_CALL);
 195         pkt.u.call.rpcvers = htonl(2);  /* use RPC version 2 */
 196         pkt.u.call.prog = htonl(rpc_prog);
 197         pkt.u.call.vers = htonl(2);     /* portmapper is version 2 */
 198         pkt.u.call.proc = htonl(rpc_proc);
 199         p = (uint32_t *)&(pkt.u.call.data);
 200
 201         if (datalen)
 202                 memcpy ((char *)p, (char *)data, datalen*sizeof(uint32_t));
 203
 204         pktlen = (char *)p + datalen*sizeof(uint32_t) - (char *)&pkt;
 205
 206         memcpy ((char *)NetTxPacket+ETHER_HDR_SIZE+IP_HDR_SIZE, (char *)&pkt, pktlen);
 207
 208         if (rpc_prog == PROG_PORTMAP)
 209                 sport = SUNRPC_PORT;
 210         else if (rpc_prog == PROG_MOUNT)
 211                 sport = NfsSrvMountPort;
 212         else
 213                 sport = NfsSrvNfsPort;
 214
 215         NetSendUDPPacket (NetServerEther, NfsServerIP, sport, NfsOurPort, pktlen);
 216 }
 217
 218 /**************************************************************************
 219 RPC_LOOKUP - Lookup RPC Port numbers
 220 **************************************************************************/
 221 static void
 222 rpc_lookup_req (int prog, int ver)
 223 {
 224         uint32_t data[16];
 225
 226         data[0] = 0; data[1] = 0;       /* auth credential */
 227         data[2] = 0; data[3] = 0;       /* auth verifier */
 228         data[4] = htonl(prog);
 229         data[5] = htonl(ver);
 230         data[6] = htonl(17);    /* IP_UDP */
 231         data[7] = 0;
 232
 233         rpc_req (PROG_PORTMAP, PORTMAP_GETPORT, data, 8);
 234 }
 235
 236 /**************************************************************************
 237 NFS_MOUNT - Mount an NFS Filesystem
 238 **************************************************************************/
 239 static void
 240 nfs_mount_req (char *path)
 241 {
 242         uint32_t data[1024];
 243         uint32_t *p;
 244         int len;
 245         int pathlen;
 246
 247         pathlen = strlen (path);
 248
 249         p = &(data[0]);
 250         p = (uint32_t *)rpc_add_credentials((long *)p);
 251
 252         *p++ = htonl(pathlen);
 253         if (pathlen & 3) *(p + pathlen / 4) = 0;
 254         memcpy (p, path, pathlen);
 255         p += (pathlen + 3) / 4;
 256
 257         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 258
 259         rpc_req (PROG_MOUNT, MOUNT_ADDENTRY, data, len);
 260 }
 261
 262 /**************************************************************************
 263 NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server
 264 **************************************************************************/
 265 static void
 266 nfs_umountall_req (void)
 267 {
 268         uint32_t data[1024];
 269         uint32_t *p;
 270         int len;
 271
 272         if ((NfsSrvMountPort == -1) || (!fs_mounted)) {
 273                 /* Nothing mounted, nothing to umount */
 274                 return;
 275         }
 276
 277         p = &(data[0]);
 278         p = (uint32_t *)rpc_add_credentials ((long *)p);
 279
 280         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 281
 282         rpc_req (PROG_MOUNT, MOUNT_UMOUNTALL, data, len);
 283 }
 284
 285 /***************************************************************************
 286  * NFS_READLINK (AH 2003-07-14)
 287  * This procedure is called when read of the first block fails -
 288  * this probably happens when it's a directory or a symlink
 289  * In case of successful readlink(), the dirname is manipulated,
 290  * so that inside the nfs() function a recursion can be done.
 291  **************************************************************************/
 292 static void
 293 nfs_readlink_req (void)
 294 {
 295         uint32_t data[1024];
 296         uint32_t *p;
 297         int len;
 298
 299         p = &(data[0]);
 300         p = (uint32_t *)rpc_add_credentials ((long *)p);
 301
 302         memcpy (p, filefh, NFS_FHSIZE);
 303         p += (NFS_FHSIZE / 4);
 304
 305         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 306
 307         rpc_req (PROG_NFS, NFS_READLINK, data, len);
 308 }
 309
 310 /**************************************************************************
 311 NFS_LOOKUP - Lookup Pathname
 312 **************************************************************************/
 313 static void
 314 nfs_lookup_req (char *fname)
 315 {
 316         uint32_t data[1024];
 317         uint32_t *p;
 318         int len;
 319         int fnamelen;
 320
 321         fnamelen = strlen (fname);
 322
 323         p = &(data[0]);
 324         p = (uint32_t *)rpc_add_credentials ((long *)p);
 325
 326         memcpy (p, dirfh, NFS_FHSIZE);
 327         p += (NFS_FHSIZE / 4);
 328         *p++ = htonl(fnamelen);
 329         if (fnamelen & 3) *(p + fnamelen / 4) = 0;
 330         memcpy (p, fname, fnamelen);
 331         p += (fnamelen + 3) / 4;
 332
 333         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 334
 335         rpc_req (PROG_NFS, NFS_LOOKUP, data, len);
 336 }
 337
 338 /**************************************************************************
 339 NFS_READ - Read File on NFS Server
 340 **************************************************************************/
 341 static void
 342 nfs_read_req (int offset, int readlen)
 343 {
 344         uint32_t data[1024];
 345         uint32_t *p;
 346         int len;
 347
 348         p = &(data[0]);
 349         p = (uint32_t *)rpc_add_credentials ((long *)p);
 350
 351         memcpy (p, filefh, NFS_FHSIZE);
 352         p += (NFS_FHSIZE / 4);
 353         *p++ = htonl(offset);
 354         *p++ = htonl(readlen);
 355         *p++ = 0;
 356
 357         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 358
 359         rpc_req (PROG_NFS, NFS_READ, data, len);
 360 }
 361
 362 /**************************************************************************
 363 RPC request dispatcher
 364 **************************************************************************/
 365
 366 static void
 367 NfsSend (void)
 368 {
 369 #ifdef NFS_DEBUG
 370         printf ("%s\n", __FUNCTION__);
 371 #endif
 372
 373         switch (NfsState) {
 374         case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
 375                 rpc_lookup_req (PROG_MOUNT, 1);
 376                 break;
 377         case STATE_PRCLOOKUP_PROG_NFS_REQ:
 378                 rpc_lookup_req (PROG_NFS, 2);
 379                 break;
 380         case STATE_MOUNT_REQ:
 381                 nfs_mount_req (nfs_path);
 382                 break;
 383         case STATE_UMOUNT_REQ:
 384                 nfs_umountall_req ();
 385                 break;
 386         case STATE_LOOKUP_REQ:
 387                 nfs_lookup_req (nfs_filename);
 388                 break;
 389         case STATE_READ_REQ:
 390                 nfs_read_req (nfs_offset, nfs_len);
 391                 break;
 392         case STATE_READLINK_REQ:
 393                 nfs_readlink_req ();
 394                 break;
 395         }
 396 }
 397
 398 /**************************************************************************
 399 Handlers for the reply from server
 400 **************************************************************************/
 401
 402 static int
 403 rpc_lookup_reply (int prog, uchar *pkt, unsigned len)
 404 {
 405         struct rpc_t rpc_pkt;
 406
 407         memcpy ((unsigned char *)&rpc_pkt, pkt, len);
 408
 409 #ifdef NFS_DEBUG
 410         printf ("%s\n", __FUNCTION__);
 411 #endif
 412
 413         if (rpc_pkt.u.reply.rstatus  ||
 414             rpc_pkt.u.reply.verifier ||
 415             rpc_pkt.u.reply.astatus  ||
 416             rpc_pkt.u.reply.astatus) {
 417         }
 418
 419         switch (prog) {
 420         case PROG_MOUNT:
 421                 NfsSrvMountPort = ntohl(rpc_pkt.u.reply.data[0]);
 422                 break;
 423         case PROG_NFS:
 424                 NfsSrvNfsPort = ntohl(rpc_pkt.u.reply.data[0]);
 425                 break;
 426         }
 427
 428         return 0;
 429 }
 430
 431 static int
 432 nfs_mount_reply (uchar *pkt, unsigned len)
 433 {
 434         struct rpc_t rpc_pkt;
 435
 436 #ifdef NFS_DEBUG
 437         printf ("%s\n", __FUNCTION__);
 438 #endif
 439
 440         memcpy ((unsigned char *)&rpc_pkt, pkt, len);
 441
 442         if (rpc_pkt.u.reply.rstatus  ||
 443             rpc_pkt.u.reply.verifier ||
 444             rpc_pkt.u.reply.astatus  ||
 445             rpc_pkt.u.reply.data[0]) {
 446                 return -1;
 447         }
 448
 449         fs_mounted = 1;
 450         memcpy (dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
 451
 452         return 0;
 453 }
 454
 455 static int
 456 nfs_umountall_reply (uchar *pkt, unsigned len)
 457 {
 458         struct rpc_t rpc_pkt;
 459
 460 #ifdef NFS_DEBUG
 461         printf ("%s\n", __FUNCTION__);
 462 #endif
 463
 464         memcpy ((unsigned char *)&rpc_pkt, pkt, len);
 465
 466         if (rpc_pkt.u.reply.rstatus  ||
 467             rpc_pkt.u.reply.verifier ||
 468             rpc_pkt.u.reply.astatus) {
 469                 return -1;
 470         }
 471
 472         fs_mounted = 0;
 473         memset (dirfh, 0, sizeof(dirfh));
 474
 475         return 0;
 476 }
 477
 478 static int
 479 nfs_lookup_reply (uchar *pkt, unsigned len)
 480 {
 481         struct rpc_t rpc_pkt;
 482
 483 #ifdef NFS_DEBUG
 484         printf ("%s\n", __FUNCTION__);
 485 #endif
 486
 487         memcpy ((unsigned char *)&rpc_pkt, pkt, len);
 488
 489         if (rpc_pkt.u.reply.rstatus  ||
 490             rpc_pkt.u.reply.verifier ||
 491             rpc_pkt.u.reply.astatus  ||
 492             rpc_pkt.u.reply.data[0]) {
 493                 return -1;
 494         }
 495
 496         memcpy (filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
 497
 498         return 0;
 499 }
 500
 501 static int
 502 nfs_readlink_reply (uchar *pkt, unsigned len)
 503 {
 504         struct rpc_t rpc_pkt;
 505         int rlen;
 506
 507 #ifdef NFS_DEBUG
 508         printf ("%s\n", __FUNCTION__);
 509 #endif
 510
 511         memcpy ((unsigned char *)&rpc_pkt, pkt, len);
 512
 513         if (rpc_pkt.u.reply.rstatus  ||
 514             rpc_pkt.u.reply.verifier ||
 515             rpc_pkt.u.reply.astatus  ||
 516             rpc_pkt.u.reply.data[0]) {
 517                 return -1;
 518         }
 519
 520         rlen = ntohl (rpc_pkt.u.reply.data[1]); /* new path length */
 521
 522         if (*((char *)&(rpc_pkt.u.reply.data[2])) != '/') {
 523                 int pathlen;
 524                 strcat (nfs_path, "/");
 525                 pathlen = strlen(nfs_path);
 526                 memcpy (nfs_path+pathlen, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
 527                 nfs_path[pathlen+rlen+1] = 0;
 528         } else {
 529                 memcpy (nfs_path, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
 530                 nfs_path[rlen] = 0;
 531         }
 532         return 0;
 533 }
 534
 535 static int
 536 nfs_read_reply (uchar *pkt, unsigned len)
 537 {
 538         struct rpc_t rpc_pkt;
 539         int rlen;
 540
 541 #ifdef NFS_DEBUG_nop
 542         printf ("%s\n", __FUNCTION__);
 543 #endif
 544
 545         memcpy ((uchar *)&rpc_pkt, pkt, len);
 546
 547         if (rpc_pkt.u.reply.rstatus  ||
 548             rpc_pkt.u.reply.verifier ||
 549             rpc_pkt.u.reply.astatus  ||
 550             rpc_pkt.u.reply.data[0]) {
 551                 if (rpc_pkt.u.reply.rstatus) {
 552                         return -9999;
 553                 }
 554                 if (rpc_pkt.u.reply.astatus) {
 555                         return -9999;
 556                 }
 557                 return -ntohl(rpc_pkt.u.reply.data[0]);;
 558         }
 559
 560         if ((nfs_offset!=0) && !((nfs_offset) % (NFS_READ_SIZE/2*10*HASHES_PER_LINE))) {
 561                 puts ("\n\t ");
 562         }
 563         if (!(nfs_offset % ((NFS_READ_SIZE/2)*10))) {
 564                 putc ('#');
 565         }
 566
 567         rlen = ntohl(rpc_pkt.u.reply.data[18]);
 568         store_block ((uchar *)&(rpc_pkt.u.reply.data[19]), nfs_offset, rlen);
 569
 570         return rlen;
 571 }
 572
 573 /**************************************************************************
 574 Interfaces of U-BOOT
 575 **************************************************************************/
 576
 577 static void
 578 NfsHandler (uchar *pkt, unsigned dest, unsigned src, unsigned len)
 579 {
 580         int rlen;
 581
 582 #ifdef NFS_DEBUG
 583         printf ("%s\n", __FUNCTION__);
 584 #endif
 585
 586         if (dest != NfsOurPort) return;
 587
 588         switch (NfsState) {
 589         case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
 590                 rpc_lookup_reply (PROG_MOUNT, pkt, len);
 591                 NfsState = STATE_PRCLOOKUP_PROG_NFS_REQ;
 592                 NfsSend ();
 593                 break;
 594
 595         case STATE_PRCLOOKUP_PROG_NFS_REQ:
 596                 rpc_lookup_reply (PROG_NFS, pkt, len);
 597                 NfsState = STATE_MOUNT_REQ;
 598                 NfsSend ();
 599                 break;
 600
 601         case STATE_MOUNT_REQ:
 602                 if (nfs_mount_reply(pkt, len)) {
 603                         puts ("*** ERROR: Cannot mount\n");
 604                         /* just to be sure... */
 605                         NfsState = STATE_UMOUNT_REQ;
 606                         NfsSend ();
 607                 } else {
 608                         NfsState = STATE_LOOKUP_REQ;
 609                         NfsSend ();
 610                 }
 611                 break;
 612
 613         case STATE_UMOUNT_REQ:
 614                 if (nfs_umountall_reply(pkt, len)) {
 615                         puts ("*** ERROR: Cannot umount\n");
 616                         NetState = NETLOOP_FAIL;
 617                 } else {
 618                         puts ("\ndone\n");
 619                         NetState = NETLOOP_SUCCESS;
 620                 }
 621                 break;
 622
 623         case STATE_LOOKUP_REQ:
 624                 if (nfs_lookup_reply(pkt, len)) {
 625                         puts ("*** ERROR: File lookup fail\n");
 626                         NfsState = STATE_UMOUNT_REQ;
 627                         NfsSend ();
 628                 } else {
 629                         NfsState = STATE_READ_REQ;
 630                         nfs_offset = 0;
 631                         nfs_len = NFS_READ_SIZE;
 632                         NfsSend ();
 633                 }
 634                 break;
 635
 636         case STATE_READLINK_REQ:
 637                 if (nfs_readlink_reply(pkt, len)) {
 638                         puts ("*** ERROR: Symlink fail\n");
 639                         NfsState = STATE_UMOUNT_REQ;
 640                         NfsSend ();
 641                 } else {
 642 #ifdef NFS_DEBUG
 643                         printf ("Symlink --> %s\n", nfs_path);
 644 #endif
 645                         nfs_filename = basename (nfs_path);
 646                         nfs_path     = dirname (nfs_path);
 647
 648                         NfsState = STATE_MOUNT_REQ;
 649                         NfsSend ();
 650                 }
 651                 break;
 652
 653         case STATE_READ_REQ:
 654                 rlen = nfs_read_reply (pkt, len);
 655                 if (rlen > 0) {
 656                         nfs_offset += rlen;
 657                         NfsSend ();
 658                 }
 659                 else if ((rlen == -NFSERR_ISDIR)||(rlen == -NFSERR_INVAL)) {
 660                         /* symbolic link */
 661                         NfsState = STATE_READLINK_REQ;
 662                         NfsSend ();
 663                 } else {
 664                         NfsState = STATE_UMOUNT_REQ;
 665                         NfsSend ();
 666                 }
 667                 break;
 668         }
 669 }
 670
 671 static void
 672 NfsTimeout (void)
 673 {
 674         puts ("Timeout\n");
 675         NetState = NETLOOP_FAIL;
 676         return;
 677 }
 678
 679 void
 680 NfsStart (void)
 681 {
 682 #ifdef NFS_DEBUG
 683         printf ("%s\n", __FUNCTION__);
 684 #endif
 685
 686         NfsServerIP = NetServerIP;
 687         nfs_path = (char *)nfs_path_buff;
 688
 689         if (nfs_path == NULL) {
 690                 NetState = NETLOOP_FAIL;
 691                 puts ("*** ERROR: Fail allocate memory\n");
 692                 return;
 693         }
 694
 695         if (BootFile[0] == '\0') {
 696                 IPaddr_t OurIP = ntohl (NetOurIP);
 697
 698                 sprintf (default_filename, "/nfsroot/%02lX%02lX%02lX%02lX.img",
 699                         OurIP & 0xFF,
 700                         (OurIP >>  8) & 0xFF,
 701                         (OurIP >> 16) & 0xFF,
 702                         (OurIP >> 24) & 0xFF    );
 703                 strcpy (nfs_path, default_filename);
 704
 705                 printf ("*** Warning: no boot file name; using '%s'\n",
 706                         nfs_path);
 707         } else {
 708                 char *p=BootFile;
 709
 710                 p = strchr (p, ':');
 711
 712                 if (p != NULL) {
 713                         NfsServerIP = string_to_ip (BootFile);
 714                         ++p;
 715                         strcpy (nfs_path, p);
 716                 } else {
 717                         strcpy (nfs_path, BootFile);
 718                 }
 719         }
 720
 721         nfs_filename = basename (nfs_path);
 722         nfs_path     = dirname (nfs_path);
 723
 724 #if defined(CONFIG_NET_MULTI)
 725         printf ("Using %s device\n", eth_get_name());
 726 #endif
 727
 728         puts ("File transfer via NFS from server "); print_IPaddr (NfsServerIP);
 729         puts ("; our IP address is ");              print_IPaddr (NetOurIP);
 730
 731         /* Check if we need to send across this subnet */
 732         if (NetOurGatewayIP && NetOurSubnetMask) {
 733                 IPaddr_t OurNet     = NetOurIP    & NetOurSubnetMask;
 734                 IPaddr_t ServerNet  = NetServerIP & NetOurSubnetMask;
 735
 736                 if (OurNet != ServerNet) {
 737                         puts ("; sending through gateway ");
 738                         print_IPaddr (NetOurGatewayIP) ;
 739                 }
 740         }
 741         putc ('\n');
 742
 743         printf ("Filename '%s/%s'.", nfs_path, nfs_filename);
 744
 745         if (NetBootFileSize) {
 746                 printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
 747                 print_size (NetBootFileSize<<9, "");
 748         }
 749         putc ('\n');
 750
 751         printf ("Load address: 0x%lx\n", load_addr);
 752
 753         printf ("Loading: *\b");
 754
 755         NetSetTimeout (NFS_TIMEOUT * CFG_HZ, NfsTimeout);
 756         NetSetHandler (NfsHandler);
 757
 758         rpc_init ();
 759         NfsTimeoutCount = 0;
 760         NfsState = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
 761
 762         /*NfsOurPort = 4096 + (get_ticks() % 3072);*/
 763         /*FIX ME !!!*/
 764         NfsOurPort = 1000;
 765
 766         /* zero out server ether in case the server ip has changed */
 767         memset (NetServerEther, 0, 6);
 768
 769         NfsSend ();
 770 }
 771
 772 #endif /* CONFIG_COMMANDS & CFG_CMD_NFS */