git.sur5r.net Git - u-boot/blob - 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 /* NOTE 4: NFSv3 support added by Guillaume GARDET, 2016-June-20.
  26  * NFSv2 is still used by default. But if server does not support NFSv2, then
  27  * NFSv3 is used, if available on NFS server. */
  28
  29 #include <common.h>
  30 #include <command.h>
  31 #include <net.h>
  32 #include <malloc.h>
  33 #include <mapmem.h>
  34 #include "nfs.h"
  35 #include "bootp.h"
  36
  37 #define HASHES_PER_LINE 65      /* Number of "loading" hashes per line  */
  38 #define NFS_RETRY_COUNT 30
  39 #ifndef CONFIG_NFS_TIMEOUT
  40 # define NFS_TIMEOUT 2000UL
  41 #else
  42 # define NFS_TIMEOUT CONFIG_NFS_TIMEOUT
  43 #endif
  44
  45 #define NFS_RPC_ERR     1
  46 #define NFS_RPC_DROP    124
  47
  48 static int fs_mounted;
  49 static unsigned long rpc_id;
  50 static int nfs_offset = -1;
  51 static int nfs_len;
  52 static ulong nfs_timeout = NFS_TIMEOUT;
  53
  54 static char dirfh[NFS_FHSIZE];  /* NFSv2 / NFSv3 file handle of directory */
  55 static char filefh[NFS3_FHSIZE]; /* NFSv2 / NFSv3 file handle */
  56 static int filefh3_length;      /* (variable) length of filefh when NFSv3 */
  57
  58 static enum net_loop_state nfs_download_state;
  59 static struct in_addr nfs_server_ip;
  60 static int nfs_server_mount_port;
  61 static int nfs_server_port;
  62 static int nfs_our_port;
  63 static int nfs_timeout_count;
  64 static int nfs_state;
  65 #define STATE_PRCLOOKUP_PROG_MOUNT_REQ  1
  66 #define STATE_PRCLOOKUP_PROG_NFS_REQ    2
  67 #define STATE_MOUNT_REQ                 3
  68 #define STATE_UMOUNT_REQ                4
  69 #define STATE_LOOKUP_REQ                5
  70 #define STATE_READ_REQ                  6
  71 #define STATE_READLINK_REQ              7
  72
  73 static char *nfs_filename;
  74 static char *nfs_path;
  75 static char nfs_path_buff[2048];
  76
  77 #define NFSV2_FLAG 1
  78 #define NFSV3_FLAG 1 << 1
  79 static char supported_nfs_versions = NFSV2_FLAG | NFSV3_FLAG;
  80
  81 static inline int store_block(uchar *src, unsigned offset, unsigned len)
  82 {
  83         ulong newsize = offset + len;
  84 #ifdef CONFIG_SYS_DIRECT_FLASH_NFS
  85         int i, rc = 0;
  86
  87         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  88                 /* start address in flash? */
  89                 if (load_addr + offset >= flash_info[i].start[0]) {
  90                         rc = 1;
  91                         break;
  92                 }
  93         }
  94
  95         if (rc) { /* Flash is destination for this packet */
  96                 rc = flash_write((uchar *)src, (ulong)(load_addr+offset), len);
  97                 if (rc) {
  98                         flash_perror(rc);
  99                         return -1;
 100                 }
 101         } else
 102 #endif /* CONFIG_SYS_DIRECT_FLASH_NFS */
 103         {
 104                 void *ptr = map_sysmem(load_addr + offset, len);
 105
 106                 memcpy(ptr, src, len);
 107                 unmap_sysmem(ptr);
 108         }
 109
 110         if (net_boot_file_size < (offset + len))
 111                 net_boot_file_size = newsize;
 112         return 0;
 113 }
 114
 115 static char *basename(char *path)
 116 {
 117         char *fname;
 118
 119         fname = path + strlen(path) - 1;
 120         while (fname >= path) {
 121                 if (*fname == '/') {
 122                         fname++;
 123                         break;
 124                 }
 125                 fname--;
 126         }
 127         return fname;
 128 }
 129
 130 static char *dirname(char *path)
 131 {
 132         char *fname;
 133
 134         fname = basename(path);
 135         --fname;
 136         *fname = '\0';
 137         return path;
 138 }
 139
 140 /**************************************************************************
 141 RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
 142 **************************************************************************/
 143 static uint32_t *rpc_add_credentials(uint32_t *p)
 144 {
 145         int hl;
 146         int hostnamelen;
 147         char hostname[256];
 148
 149         strcpy(hostname, "");
 150         hostnamelen = strlen(hostname);
 151
 152         /* Here's the executive summary on authentication requirements of the
 153          * various NFS server implementations:  Linux accepts both AUTH_NONE
 154          * and AUTH_UNIX authentication (also accepts an empty hostname field
 155          * in the AUTH_UNIX scheme).  *BSD refuses AUTH_NONE, but accepts
 156          * AUTH_UNIX (also accepts an empty hostname field in the AUTH_UNIX
 157          * scheme).  To be safe, use AUTH_UNIX and pass the hostname if we have
 158          * it (if the BOOTP/DHCP reply didn't give one, just use an empty
 159          * hostname).  */
 160
 161         hl = (hostnamelen + 3) & ~3;
 162
 163         /* Provide an AUTH_UNIX credential.  */
 164         *p++ = htonl(1);                /* AUTH_UNIX */
 165         *p++ = htonl(hl+20);            /* auth length */
 166         *p++ = htonl(0);                /* stamp */
 167         *p++ = htonl(hostnamelen);      /* hostname string */
 168         if (hostnamelen & 3)
 169                 *(p + hostnamelen / 4) = 0; /* add zero padding */
 170         memcpy(p, hostname, hostnamelen);
 171         p += hl / 4;
 172         *p++ = 0;                       /* uid */
 173         *p++ = 0;                       /* gid */
 174         *p++ = 0;                       /* auxiliary gid list */
 175
 176         /* Provide an AUTH_NONE verifier.  */
 177         *p++ = 0;                       /* AUTH_NONE */
 178         *p++ = 0;                       /* auth length */
 179
 180         return p;
 181 }
 182
 183 /**************************************************************************
 184 RPC_LOOKUP - Lookup RPC Port numbers
 185 **************************************************************************/
 186 static struct rpc_t *rpc_req_prep(void)
 187 {
 188         return (struct rpc_t *)(net_tx_packet + net_eth_hdr_size() +
 189                                 IP_UDP_HDR_SIZE);
 190 }
 191
 192 static void rpc_req(int rpc_prog, int rpc_proc, struct rpc_t *rpc_pkt,
 193                     int datalen)
 194 {
 195         unsigned long id;
 196         int pktlen;
 197         int sport;
 198
 199         id = ++rpc_id;
 200         rpc_pkt->u.call.id = htonl(id);
 201         rpc_pkt->u.call.type = htonl(MSG_CALL);
 202         rpc_pkt->u.call.rpcvers = htonl(2);     /* use RPC version 2 */
 203         rpc_pkt->u.call.prog = htonl(rpc_prog);
 204         switch (rpc_prog) {
 205         case PROG_NFS:
 206                 if (supported_nfs_versions & NFSV2_FLAG)
 207                         rpc_pkt->u.call.vers = htonl(2);        /* NFS v2 */
 208                 else /* NFSV3_FLAG */
 209                         rpc_pkt->u.call.vers = htonl(3);        /* NFS v3 */
 210                 break;
 211         case PROG_PORTMAP:
 212         case PROG_MOUNT:
 213         default:
 214                 /* portmapper is version 2 */
 215                 rpc_pkt->u.call.vers = htonl(2);
 216         }
 217         rpc_pkt->u.call.proc = htonl(rpc_proc);
 218
 219         pktlen = ((char *)&rpc_pkt->u.call.data - (char *)&rpc_pkt) +
 220                 datalen * sizeof(uint32_t);
 221
 222         if (rpc_prog == PROG_PORTMAP)
 223                 sport = SUNRPC_PORT;
 224         else if (rpc_prog == PROG_MOUNT)
 225                 sport = nfs_server_mount_port;
 226         else
 227                 sport = nfs_server_port;
 228
 229         net_send_udp_packet(net_server_ethaddr, nfs_server_ip, sport,
 230                             nfs_our_port, pktlen);
 231 }
 232
 233 /**************************************************************************
 234 RPC_LOOKUP - Lookup RPC Port numbers
 235 **************************************************************************/
 236 static void rpc_lookup_req(int prog, int ver)
 237 {
 238         uint32_t *data;
 239         struct rpc_t *rpc_pkt = rpc_req_prep();
 240
 241         data = rpc_pkt->u.call.data;
 242         data[0] = 0; data[1] = 0;       /* auth credential */
 243         data[2] = 0; data[3] = 0;       /* auth verifier */
 244         data[4] = htonl(prog);
 245         data[5] = htonl(ver);
 246         data[6] = htonl(17);    /* IP_UDP */
 247         data[7] = 0;
 248         rpc_req(PROG_PORTMAP, PORTMAP_GETPORT, rpc_pkt, 8);
 249 }
 250
 251 /**************************************************************************
 252 NFS_MOUNT - Mount an NFS Filesystem
 253 **************************************************************************/
 254 static void nfs_mount_req(char *path)
 255 {
 256         uint32_t *p;
 257         int len;
 258         int pathlen;
 259         struct rpc_t *rpc_pkt = rpc_req_prep();
 260
 261         pathlen = strlen(path);
 262
 263         p = rpc_pkt->u.call.data;
 264         p = rpc_add_credentials(p);
 265
 266         *p++ = htonl(pathlen);
 267         if (pathlen & 3)
 268                 *(p + pathlen / 4) = 0;
 269         memcpy(p, path, pathlen);
 270         p += (pathlen + 3) / 4;
 271
 272         len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
 273
 274         rpc_req(PROG_MOUNT, MOUNT_ADDENTRY, rpc_pkt, len);
 275 }
 276
 277 /**************************************************************************
 278 NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server
 279 **************************************************************************/
 280 static void nfs_umountall_req(void)
 281 {
 282         uint32_t *p;
 283         int len;
 284         struct rpc_t *rpc_pkt = rpc_req_prep();
 285
 286         if ((nfs_server_mount_port == -1) || (!fs_mounted))
 287                 /* Nothing mounted, nothing to umount */
 288                 return;
 289
 290         p = rpc_pkt->u.call.data;
 291         p = rpc_add_credentials(p);
 292
 293         len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
 294
 295         rpc_req(PROG_MOUNT, MOUNT_UMOUNTALL, rpc_pkt, len);
 296 }
 297
 298 /***************************************************************************
 299  * NFS_READLINK (AH 2003-07-14)
 300  * This procedure is called when read of the first block fails -
 301  * this probably happens when it's a directory or a symlink
 302  * In case of successful readlink(), the dirname is manipulated,
 303  * so that inside the nfs() function a recursion can be done.
 304  **************************************************************************/
 305 static void nfs_readlink_req(void)
 306 {
 307         uint32_t *p;
 308         int len;
 309         struct rpc_t *rpc_pkt = rpc_req_prep();
 310
 311         p = rpc_pkt->u.call.data;
 312         p = rpc_add_credentials(p);
 313
 314         if (supported_nfs_versions & NFSV2_FLAG) {
 315                 memcpy(p, filefh, NFS_FHSIZE);
 316                 p += (NFS_FHSIZE / 4);
 317         } else { /* NFSV3_FLAG */
 318                 *p++ = htonl(filefh3_length);
 319                 memcpy(p, filefh, filefh3_length);
 320                 p += (filefh3_length / 4);
 321         }
 322
 323         len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
 324
 325         rpc_req(PROG_NFS, NFS_READLINK, rpc_pkt, len);
 326 }
 327
 328 /**************************************************************************
 329 NFS_LOOKUP - Lookup Pathname
 330 **************************************************************************/
 331 static void nfs_lookup_req(char *fname)
 332 {
 333         uint32_t *p;
 334         int len;
 335         int fnamelen;
 336         struct rpc_t *rpc_pkt = rpc_req_prep();
 337
 338         fnamelen = strlen(fname);
 339
 340         p = rpc_pkt->u.call.data;
 341         p = rpc_add_credentials(p);
 342
 343         if (supported_nfs_versions & NFSV2_FLAG) {
 344                 memcpy(p, dirfh, NFS_FHSIZE);
 345                 p += (NFS_FHSIZE / 4);
 346                 *p++ = htonl(fnamelen);
 347                 if (fnamelen & 3)
 348                         *(p + fnamelen / 4) = 0;
 349                 memcpy(p, fname, fnamelen);
 350                 p += (fnamelen + 3) / 4;
 351
 352                 len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
 353
 354                 rpc_req(PROG_NFS, NFS_LOOKUP, rpc_pkt, len);
 355         } else {  /* NFSV3_FLAG */
 356                 *p++ = htonl(NFS_FHSIZE);       /* Dir handle length */
 357                 memcpy(p, dirfh, NFS_FHSIZE);
 358                 p += (NFS_FHSIZE / 4);
 359                 *p++ = htonl(fnamelen);
 360                 if (fnamelen & 3)
 361                         *(p + fnamelen / 4) = 0;
 362                 memcpy(p, fname, fnamelen);
 363                 p += (fnamelen + 3) / 4;
 364
 365                 len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
 366
 367                 rpc_req(PROG_NFS, NFS3PROC_LOOKUP, rpc_pkt, len);
 368         }
 369 }
 370
 371 /**************************************************************************
 372 NFS_READ - Read File on NFS Server
 373 **************************************************************************/
 374 static void nfs_read_req(int offset, int readlen)
 375 {
 376         uint32_t *p;
 377         int len;
 378         struct rpc_t *rpc_pkt = rpc_req_prep();
 379
 380         p = rpc_pkt->u.call.data;
 381         p = rpc_add_credentials(p);
 382
 383         if (supported_nfs_versions & NFSV2_FLAG) {
 384                 memcpy(p, filefh, NFS_FHSIZE);
 385                 p += (NFS_FHSIZE / 4);
 386                 *p++ = htonl(offset);
 387                 *p++ = htonl(readlen);
 388                 *p++ = 0;
 389         } else { /* NFSV3_FLAG */
 390                 *p++ = htonl(filefh3_length);
 391                 memcpy(p, filefh, filefh3_length);
 392                 p += (filefh3_length / 4);
 393                 *p++ = htonl(0); /* offset is 64-bit long, so fill with 0 */
 394                 *p++ = htonl(offset);
 395                 *p++ = htonl(readlen);
 396                 *p++ = 0;
 397         }
 398
 399         len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
 400
 401         rpc_req(PROG_NFS, NFS_READ, rpc_pkt, len);
 402 }
 403
 404 /**************************************************************************
 405 RPC request dispatcher
 406 **************************************************************************/
 407 static void nfs_send(void)
 408 {
 409         debug("%s\n", __func__);
 410
 411         switch (nfs_state) {
 412         case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
 413                 if (supported_nfs_versions & NFSV2_FLAG)
 414                         rpc_lookup_req(PROG_MOUNT, 1);
 415                 else  /* NFSV3_FLAG */
 416                         rpc_lookup_req(PROG_MOUNT, 3);
 417                 break;
 418         case STATE_PRCLOOKUP_PROG_NFS_REQ:
 419                 if (supported_nfs_versions & NFSV2_FLAG)
 420                         rpc_lookup_req(PROG_NFS, 2);
 421                 else  /* NFSV3_FLAG */
 422                         rpc_lookup_req(PROG_NFS, 3);
 423                 break;
 424         case STATE_MOUNT_REQ:
 425                 nfs_mount_req(nfs_path);
 426                 break;
 427         case STATE_UMOUNT_REQ:
 428                 nfs_umountall_req();
 429                 break;
 430         case STATE_LOOKUP_REQ:
 431                 nfs_lookup_req(nfs_filename);
 432                 break;
 433         case STATE_READ_REQ:
 434                 nfs_read_req(nfs_offset, nfs_len);
 435                 break;
 436         case STATE_READLINK_REQ:
 437                 nfs_readlink_req();
 438                 break;
 439         }
 440 }
 441
 442 /**************************************************************************
 443 Handlers for the reply from server
 444 **************************************************************************/
 445
 446 static int rpc_lookup_reply(int prog, uchar *pkt, unsigned len)
 447 {
 448         struct rpc_t rpc_pkt;
 449
 450         memcpy(&rpc_pkt.u.data[0], pkt, len);
 451
 452         debug("%s\n", __func__);
 453
 454         if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
 455                 return -NFS_RPC_ERR;
 456         else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
 457                 return -NFS_RPC_DROP;
 458
 459         if (rpc_pkt.u.reply.rstatus  ||
 460             rpc_pkt.u.reply.verifier ||
 461             rpc_pkt.u.reply.astatus)
 462                 return -1;
 463
 464         switch (prog) {
 465         case PROG_MOUNT:
 466                 nfs_server_mount_port = ntohl(rpc_pkt.u.reply.data[0]);
 467                 break;
 468         case PROG_NFS:
 469                 nfs_server_port = ntohl(rpc_pkt.u.reply.data[0]);
 470                 break;
 471         }
 472
 473         return 0;
 474 }
 475
 476 static int nfs_mount_reply(uchar *pkt, unsigned len)
 477 {
 478         struct rpc_t rpc_pkt;
 479
 480         debug("%s\n", __func__);
 481
 482         memcpy(&rpc_pkt.u.data[0], pkt, len);
 483
 484         if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
 485                 return -NFS_RPC_ERR;
 486         else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
 487                 return -NFS_RPC_DROP;
 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         fs_mounted = 1;
 496         /*  NFSv2 and NFSv3 use same structure */
 497         memcpy(dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
 498
 499         return 0;
 500 }
 501
 502 static int nfs_umountall_reply(uchar *pkt, unsigned len)
 503 {
 504         struct rpc_t rpc_pkt;
 505
 506         debug("%s\n", __func__);
 507
 508         memcpy(&rpc_pkt.u.data[0], pkt, len);
 509
 510         if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
 511                 return -NFS_RPC_ERR;
 512         else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
 513                 return -NFS_RPC_DROP;
 514
 515         if (rpc_pkt.u.reply.rstatus  ||
 516             rpc_pkt.u.reply.verifier ||
 517             rpc_pkt.u.reply.astatus)
 518                 return -1;
 519
 520         fs_mounted = 0;
 521         memset(dirfh, 0, sizeof(dirfh));
 522
 523         return 0;
 524 }
 525
 526 static int nfs_lookup_reply(uchar *pkt, unsigned len)
 527 {
 528         struct rpc_t rpc_pkt;
 529
 530         debug("%s\n", __func__);
 531
 532         memcpy(&rpc_pkt.u.data[0], pkt, len);
 533
 534         if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
 535                 return -NFS_RPC_ERR;
 536         else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
 537                 return -NFS_RPC_DROP;
 538
 539         if (rpc_pkt.u.reply.rstatus  ||
 540             rpc_pkt.u.reply.verifier ||
 541             rpc_pkt.u.reply.astatus  ||
 542             rpc_pkt.u.reply.data[0]) {
 543                 switch (ntohl(rpc_pkt.u.reply.astatus)) {
 544                 case NFS_RPC_SUCCESS: /* Not an error */
 545                         break;
 546                 case NFS_RPC_PROG_MISMATCH:
 547                         /* Remote can't support NFS version */
 548                         switch (ntohl(rpc_pkt.u.reply.data[0])) {
 549                         /* Minimal supported NFS version */
 550                         case 3:
 551                                 debug("*** Waring: NFS version not supported: Requested: V%d, accepted: min V%d - max V%d\n",
 552                                       (supported_nfs_versions & NFSV2_FLAG) ?
 553                                                 2 : 3,
 554                                       ntohl(rpc_pkt.u.reply.data[0]),
 555                                       ntohl(rpc_pkt.u.reply.data[1]));
 556                                 debug("Will retry with NFSv3\n");
 557                                 /* Clear NFSV2_FLAG from supported versions */
 558                                 supported_nfs_versions &= ~NFSV2_FLAG;
 559                                 return -NFS_RPC_PROG_MISMATCH;
 560                         case 4:
 561                         default:
 562                                 puts("*** ERROR: NFS version not supported");
 563                                 debug(": Requested: V%d, accepted: min V%d - max V%d\n",
 564                                       (supported_nfs_versions & NFSV2_FLAG) ?
 565                                                 2 : 3,
 566                                       ntohl(rpc_pkt.u.reply.data[0]),
 567                                       ntohl(rpc_pkt.u.reply.data[1]));
 568                                 puts("\n");
 569                         }
 570                         break;
 571                 case NFS_RPC_PROG_UNAVAIL:
 572                 case NFS_RPC_PROC_UNAVAIL:
 573                 case NFS_RPC_GARBAGE_ARGS:
 574                 case NFS_RPC_SYSTEM_ERR:
 575                 default: /* Unknown error on 'accept state' flag */
 576                         debug("*** ERROR: accept state error (%d)\n",
 577                               ntohl(rpc_pkt.u.reply.astatus));
 578                         break;
 579                 }
 580                 return -1;
 581         }
 582
 583         if (supported_nfs_versions & NFSV2_FLAG) {
 584                 memcpy(filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
 585         } else {  /* NFSV3_FLAG */
 586                 filefh3_length = ntohl(rpc_pkt.u.reply.data[1]);
 587                 if (filefh3_length > NFS3_FHSIZE)
 588                         filefh3_length  = NFS3_FHSIZE;
 589                 memcpy(filefh, rpc_pkt.u.reply.data + 2, filefh3_length);
 590         }
 591
 592         return 0;
 593 }
 594
 595 static int nfs3_get_attributes_offset(uint32_t *data)
 596 {
 597         if (ntohl(data[1]) != 0) {
 598                 /* 'attributes_follow' flag is TRUE,
 599                  * so we have attributes on 21 dwords */
 600                 /* Skip unused values :
 601                         type;   32 bits value,
 602                         mode;   32 bits value,
 603                         nlink;  32 bits value,
 604                         uid;    32 bits value,
 605                         gid;    32 bits value,
 606                         size;   64 bits value,
 607                         used;   64 bits value,
 608                         rdev;   64 bits value,
 609                         fsid;   64 bits value,
 610                         fileid; 64 bits value,
 611                         atime;  64 bits value,
 612                         mtime;  64 bits value,
 613                         ctime;  64 bits value,
 614                 */
 615                 return 22;
 616         } else {
 617                 /* 'attributes_follow' flag is FALSE,
 618                  * so we don't have any attributes */
 619                 return 1;
 620         }
 621 }
 622
 623 static int nfs_readlink_reply(uchar *pkt, unsigned len)
 624 {
 625         struct rpc_t rpc_pkt;
 626         int rlen;
 627         int nfsv3_data_offset = 0;
 628
 629         debug("%s\n", __func__);
 630
 631         memcpy((unsigned char *)&rpc_pkt, pkt, len);
 632
 633         if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
 634                 return -NFS_RPC_ERR;
 635         else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
 636                 return -NFS_RPC_DROP;
 637
 638         if (rpc_pkt.u.reply.rstatus  ||
 639             rpc_pkt.u.reply.verifier ||
 640             rpc_pkt.u.reply.astatus  ||
 641             rpc_pkt.u.reply.data[0])
 642                 return -1;
 643
 644         if (!(supported_nfs_versions & NFSV2_FLAG)) { /* NFSV3_FLAG */
 645                 nfsv3_data_offset =
 646                         nfs3_get_attributes_offset(rpc_pkt.u.reply.data);
 647         }
 648
 649         /* new path length */
 650         rlen = ntohl(rpc_pkt.u.reply.data[1 + nfsv3_data_offset]);
 651
 652         if (*((char *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset])) != '/') {
 653                 int pathlen;
 654
 655                 strcat(nfs_path, "/");
 656                 pathlen = strlen(nfs_path);
 657                 memcpy(nfs_path + pathlen,
 658                        (uchar *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset]),
 659                        rlen);
 660                 nfs_path[pathlen + rlen] = 0;
 661         } else {
 662                 memcpy(nfs_path,
 663                        (uchar *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset]),
 664                        rlen);
 665                 nfs_path[rlen] = 0;
 666         }
 667         return 0;
 668 }
 669
 670 static int nfs_read_reply(uchar *pkt, unsigned len)
 671 {
 672         struct rpc_t rpc_pkt;
 673         int rlen;
 674         uchar *data_ptr;
 675
 676         debug("%s\n", __func__);
 677
 678         memcpy(&rpc_pkt.u.data[0], pkt, sizeof(rpc_pkt.u.reply));
 679
 680         if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
 681                 return -NFS_RPC_ERR;
 682         else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
 683                 return -NFS_RPC_DROP;
 684
 685         if (rpc_pkt.u.reply.rstatus  ||
 686             rpc_pkt.u.reply.verifier ||
 687             rpc_pkt.u.reply.astatus  ||
 688             rpc_pkt.u.reply.data[0]) {
 689                 if (rpc_pkt.u.reply.rstatus)
 690                         return -9999;
 691                 if (rpc_pkt.u.reply.astatus)
 692                         return -9999;
 693                 return -ntohl(rpc_pkt.u.reply.data[0]);
 694         }
 695
 696         if ((nfs_offset != 0) && !((nfs_offset) %
 697                         (NFS_READ_SIZE / 2 * 10 * HASHES_PER_LINE)))
 698                 puts("\n\t ");
 699         if (!(nfs_offset % ((NFS_READ_SIZE / 2) * 10)))
 700                 putc('#');
 701
 702         if (supported_nfs_versions & NFSV2_FLAG) {
 703                 rlen = ntohl(rpc_pkt.u.reply.data[18]);
 704                 data_ptr = (uchar *)&(rpc_pkt.u.reply.data[19]);
 705         } else {  /* NFSV3_FLAG */
 706                 int nfsv3_data_offset =
 707                         nfs3_get_attributes_offset(rpc_pkt.u.reply.data);
 708
 709                 /* count value */
 710                 rlen = ntohl(rpc_pkt.u.reply.data[1 + nfsv3_data_offset]);
 711                 /* Skip unused values :
 712                         EOF:            32 bits value,
 713                         data_size:      32 bits value,
 714                 */
 715                 data_ptr = (uchar *)
 716                         &(rpc_pkt.u.reply.data[4 + nfsv3_data_offset]);
 717         }
 718
 719         if (store_block(data_ptr, nfs_offset, rlen))
 720                         return -9999;
 721
 722         return rlen;
 723 }
 724
 725 /**************************************************************************
 726 Interfaces of U-BOOT
 727 **************************************************************************/
 728 static void nfs_timeout_handler(void)
 729 {
 730         if (++nfs_timeout_count > NFS_RETRY_COUNT) {
 731                 puts("\nRetry count exceeded; starting again\n");
 732                 net_start_again();
 733         } else {
 734                 puts("T ");
 735                 net_set_timeout_handler(nfs_timeout +
 736                                         NFS_TIMEOUT * nfs_timeout_count,
 737                                         nfs_timeout_handler);
 738                 nfs_send();
 739         }
 740 }
 741
 742 static void nfs_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 743                         unsigned src, unsigned len)
 744 {
 745         int rlen;
 746         int reply;
 747
 748         debug("%s\n", __func__);
 749
 750         if (dest != nfs_our_port)
 751                 return;
 752
 753         switch (nfs_state) {
 754         case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
 755                 if (rpc_lookup_reply(PROG_MOUNT, pkt, len) == -NFS_RPC_DROP)
 756                         break;
 757                 nfs_state = STATE_PRCLOOKUP_PROG_NFS_REQ;
 758                 nfs_send();
 759                 break;
 760
 761         case STATE_PRCLOOKUP_PROG_NFS_REQ:
 762                 if (rpc_lookup_reply(PROG_NFS, pkt, len) == -NFS_RPC_DROP)
 763                         break;
 764                 nfs_state = STATE_MOUNT_REQ;
 765                 nfs_send();
 766                 break;
 767
 768         case STATE_MOUNT_REQ:
 769                 reply = nfs_mount_reply(pkt, len);
 770                 if (reply == -NFS_RPC_DROP) {
 771                         break;
 772                 } else if (reply == -NFS_RPC_ERR) {
 773                         puts("*** ERROR: Cannot mount\n");
 774                         /* just to be sure... */
 775                         nfs_state = STATE_UMOUNT_REQ;
 776                         nfs_send();
 777                 } else {
 778                         nfs_state = STATE_LOOKUP_REQ;
 779                         nfs_send();
 780                 }
 781                 break;
 782
 783         case STATE_UMOUNT_REQ:
 784                 reply = nfs_umountall_reply(pkt, len);
 785                 if (reply == -NFS_RPC_DROP) {
 786                         break;
 787                 } else if (reply == -NFS_RPC_ERR) {
 788                         debug("*** ERROR: Cannot umount\n");
 789                         net_set_state(NETLOOP_FAIL);
 790                 } else {
 791                         puts("\ndone\n");
 792                         net_set_state(nfs_download_state);
 793                 }
 794                 break;
 795
 796         case STATE_LOOKUP_REQ:
 797                 reply = nfs_lookup_reply(pkt, len);
 798                 if (reply == -NFS_RPC_DROP) {
 799                         break;
 800                 } else if (reply == -NFS_RPC_ERR) {
 801                         puts("*** ERROR: File lookup fail\n");
 802                         nfs_state = STATE_UMOUNT_REQ;
 803                         nfs_send();
 804                 } else if (reply == -NFS_RPC_PROG_MISMATCH &&
 805                            supported_nfs_versions != 0) {
 806                         /* umount */
 807                         nfs_state = STATE_UMOUNT_REQ;
 808                         nfs_send();
 809                         /* And retry with another supported version */
 810                         nfs_state = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
 811                         nfs_send();
 812                 } else {
 813                         nfs_state = STATE_READ_REQ;
 814                         nfs_offset = 0;
 815                         nfs_len = NFS_READ_SIZE;
 816                         nfs_send();
 817                 }
 818                 break;
 819
 820         case STATE_READLINK_REQ:
 821                 reply = nfs_readlink_reply(pkt, len);
 822                 if (reply == -NFS_RPC_DROP) {
 823                         break;
 824                 } else if (reply == -NFS_RPC_ERR) {
 825                         puts("*** ERROR: Symlink fail\n");
 826                         nfs_state = STATE_UMOUNT_REQ;
 827                         nfs_send();
 828                 } else {
 829                         debug("Symlink --> %s\n", nfs_path);
 830                         nfs_filename = basename(nfs_path);
 831                         nfs_path     = dirname(nfs_path);
 832
 833                         nfs_state = STATE_MOUNT_REQ;
 834                         nfs_send();
 835                 }
 836                 break;
 837
 838         case STATE_READ_REQ:
 839                 rlen = nfs_read_reply(pkt, len);
 840                 net_set_timeout_handler(nfs_timeout, nfs_timeout_handler);
 841                 if (rlen > 0) {
 842                         nfs_offset += rlen;
 843                         nfs_send();
 844                 } else if ((rlen == -NFSERR_ISDIR) || (rlen == -NFSERR_INVAL)) {
 845                         /* symbolic link */
 846                         nfs_state = STATE_READLINK_REQ;
 847                         nfs_send();
 848                 } else {
 849                         if (!rlen)
 850                                 nfs_download_state = NETLOOP_SUCCESS;
 851                         if (rlen < 0)
 852                                 debug("NFS READ error (%d)\n", rlen);
 853                         nfs_state = STATE_UMOUNT_REQ;
 854                         nfs_send();
 855                 }
 856                 break;
 857         }
 858 }
 859
 860
 861 void nfs_start(void)
 862 {
 863         debug("%s\n", __func__);
 864         nfs_download_state = NETLOOP_FAIL;
 865
 866         nfs_server_ip = net_server_ip;
 867         nfs_path = (char *)nfs_path_buff;
 868
 869         if (nfs_path == NULL) {
 870                 net_set_state(NETLOOP_FAIL);
 871                 debug("*** ERROR: Fail allocate memory\n");
 872                 return;
 873         }
 874
 875         if (net_boot_file_name[0] == '\0') {
 876                 sprintf(nfs_path, "/nfsroot/%02X%02X%02X%02X.img",
 877                         net_ip.s_addr & 0xFF,
 878                         (net_ip.s_addr >>  8) & 0xFF,
 879                         (net_ip.s_addr >> 16) & 0xFF,
 880                         (net_ip.s_addr >> 24) & 0xFF);
 881
 882                 debug("*** Warning: no boot file name; using '%s'\n",
 883                       nfs_path);
 884         } else {
 885                 char *p = net_boot_file_name;
 886
 887                 p = strchr(p, ':');
 888
 889                 if (p != NULL) {
 890                         nfs_server_ip = string_to_ip(net_boot_file_name);
 891                         ++p;
 892                         strcpy(nfs_path, p);
 893                 } else {
 894                         strcpy(nfs_path, net_boot_file_name);
 895                 }
 896         }
 897
 898         nfs_filename = basename(nfs_path);
 899         nfs_path     = dirname(nfs_path);
 900
 901         debug("Using %s device\n", eth_get_name());
 902
 903         debug("File transfer via NFS from server %pI4; our IP address is %pI4",
 904               &nfs_server_ip, &net_ip);
 905
 906         /* Check if we need to send across this subnet */
 907         if (net_gateway.s_addr && net_netmask.s_addr) {
 908                 struct in_addr our_net;
 909                 struct in_addr server_net;
 910
 911                 our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
 912                 server_net.s_addr = net_server_ip.s_addr & net_netmask.s_addr;
 913                 if (our_net.s_addr != server_net.s_addr)
 914                         debug("; sending through gateway %pI4",
 915                               &net_gateway);
 916         }
 917         debug("\nFilename '%s/%s'.", nfs_path, nfs_filename);
 918
 919         if (net_boot_file_expected_size_in_blocks) {
 920                 debug(" Size is 0x%x Bytes = ",
 921                       net_boot_file_expected_size_in_blocks << 9);
 922                 print_size(net_boot_file_expected_size_in_blocks << 9, "");
 923         }
 924         debug("\nLoad address: 0x%lx\nLoading: *\b", load_addr);
 925
 926         net_set_timeout_handler(nfs_timeout, nfs_timeout_handler);
 927         net_set_udp_handler(nfs_handler);
 928
 929         nfs_timeout_count = 0;
 930         nfs_state = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
 931
 932         /*nfs_our_port = 4096 + (get_ticks() % 3072);*/
 933         /*FIX ME !!!*/
 934         nfs_our_port = 1000;
 935
 936         /* zero out server ether in case the server ip has changed */
 937         memset(net_server_ethaddr, 0, 6);
 938
 939         nfs_send();
 940 }