2 * NFS support driver - based on etherboot and U-BOOT's tftp.c
4 * Masami Komiya <mkomiya@sonare.it> 2004
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. */
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. */
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. */
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. */
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
42 # define NFS_TIMEOUT CONFIG_NFS_TIMEOUT
46 #define NFS_RPC_DROP 124
48 static int fs_mounted;
49 static unsigned long rpc_id;
50 static int nfs_offset = -1;
52 static ulong nfs_timeout = NFS_TIMEOUT;
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 */
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;
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
73 static char *nfs_filename;
74 static char *nfs_path;
75 static char nfs_path_buff[2048];
78 #define NFSV3_FLAG 1 << 1
79 static char supported_nfs_versions = NFSV2_FLAG | NFSV3_FLAG;
81 static inline int store_block(uchar *src, unsigned offset, unsigned len)
83 ulong newsize = offset + len;
84 #ifdef CONFIG_SYS_DIRECT_FLASH_NFS
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]) {
95 if (rc) { /* Flash is destination for this packet */
96 rc = flash_write((uchar *)src, (ulong)(load_addr+offset), len);
102 #endif /* CONFIG_SYS_DIRECT_FLASH_NFS */
104 void *ptr = map_sysmem(load_addr + offset, len);
106 memcpy(ptr, src, len);
110 if (net_boot_file_size < (offset + len))
111 net_boot_file_size = newsize;
115 static char *basename(char *path)
119 fname = path + strlen(path) - 1;
120 while (fname >= path) {
130 static char *dirname(char *path)
134 fname = basename(path);
140 /**************************************************************************
141 RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
142 **************************************************************************/
143 static uint32_t *rpc_add_credentials(uint32_t *p)
149 strcpy(hostname, "");
150 hostnamelen = strlen(hostname);
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
161 hl = (hostnamelen + 3) & ~3;
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 */
169 *(p + hostnamelen / 4) = 0; /* add zero padding */
170 memcpy(p, hostname, hostnamelen);
174 *p++ = 0; /* auxiliary gid list */
176 /* Provide an AUTH_NONE verifier. */
177 *p++ = 0; /* AUTH_NONE */
178 *p++ = 0; /* auth length */
183 /**************************************************************************
184 RPC_LOOKUP - Lookup RPC Port numbers
185 **************************************************************************/
186 static void rpc_req(int rpc_prog, int rpc_proc, uint32_t *data, int datalen)
188 struct rpc_t rpc_pkt;
195 rpc_pkt.u.call.id = htonl(id);
196 rpc_pkt.u.call.type = htonl(MSG_CALL);
197 rpc_pkt.u.call.rpcvers = htonl(2); /* use RPC version 2 */
198 rpc_pkt.u.call.prog = htonl(rpc_prog);
201 if (supported_nfs_versions & NFSV2_FLAG)
202 rpc_pkt.u.call.vers = htonl(2); /* NFS v2 */
203 else /* NFSV3_FLAG */
204 rpc_pkt.u.call.vers = htonl(3); /* NFS v3 */
209 rpc_pkt.u.call.vers = htonl(2); /* portmapper is version 2 */
211 rpc_pkt.u.call.proc = htonl(rpc_proc);
212 p = (uint32_t *)&(rpc_pkt.u.call.data);
215 memcpy((char *)p, (char *)data, datalen*sizeof(uint32_t));
217 pktlen = (char *)p + datalen * sizeof(uint32_t) - (char *)&rpc_pkt;
219 memcpy((char *)net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE,
220 &rpc_pkt.u.data[0], pktlen);
222 if (rpc_prog == PROG_PORTMAP)
224 else if (rpc_prog == PROG_MOUNT)
225 sport = nfs_server_mount_port;
227 sport = nfs_server_port;
229 net_send_udp_packet(net_server_ethaddr, nfs_server_ip, sport,
230 nfs_our_port, pktlen);
233 /**************************************************************************
234 RPC_LOOKUP - Lookup RPC Port numbers
235 **************************************************************************/
236 static void rpc_lookup_req(int prog, int ver)
240 data[0] = 0; data[1] = 0; /* auth credential */
241 data[2] = 0; data[3] = 0; /* auth verifier */
242 data[4] = htonl(prog);
243 data[5] = htonl(ver);
244 data[6] = htonl(17); /* IP_UDP */
246 rpc_req(PROG_PORTMAP, PORTMAP_GETPORT, data, 8);
249 /**************************************************************************
250 NFS_MOUNT - Mount an NFS Filesystem
251 **************************************************************************/
252 static void nfs_mount_req(char *path)
259 pathlen = strlen(path);
262 p = rpc_add_credentials(p);
264 *p++ = htonl(pathlen);
266 *(p + pathlen / 4) = 0;
267 memcpy(p, path, pathlen);
268 p += (pathlen + 3) / 4;
270 len = (uint32_t *)p - (uint32_t *)&(data[0]);
272 rpc_req(PROG_MOUNT, MOUNT_ADDENTRY, data, len);
275 /**************************************************************************
276 NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server
277 **************************************************************************/
278 static void nfs_umountall_req(void)
284 if ((nfs_server_mount_port == -1) || (!fs_mounted))
285 /* Nothing mounted, nothing to umount */
289 p = rpc_add_credentials(p);
291 len = (uint32_t *)p - (uint32_t *)&(data[0]);
293 rpc_req(PROG_MOUNT, MOUNT_UMOUNTALL, data, len);
296 /***************************************************************************
297 * NFS_READLINK (AH 2003-07-14)
298 * This procedure is called when read of the first block fails -
299 * this probably happens when it's a directory or a symlink
300 * In case of successful readlink(), the dirname is manipulated,
301 * so that inside the nfs() function a recursion can be done.
302 **************************************************************************/
303 static void nfs_readlink_req(void)
310 p = rpc_add_credentials(p);
312 if (supported_nfs_versions & NFSV2_FLAG) {
313 memcpy(p, filefh, NFS_FHSIZE);
314 p += (NFS_FHSIZE / 4);
315 } else { /* NFSV3_FLAG */
316 *p++ = htonl(filefh3_length);
317 memcpy(p, filefh, filefh3_length);
318 p += (filefh3_length / 4);
321 len = (uint32_t *)p - (uint32_t *)&(data[0]);
323 rpc_req(PROG_NFS, NFS_READLINK, data, len);
326 /**************************************************************************
327 NFS_LOOKUP - Lookup Pathname
328 **************************************************************************/
329 static void nfs_lookup_req(char *fname)
336 fnamelen = strlen(fname);
339 p = rpc_add_credentials(p);
341 if (supported_nfs_versions & NFSV2_FLAG) {
342 memcpy(p, dirfh, NFS_FHSIZE);
343 p += (NFS_FHSIZE / 4);
344 *p++ = htonl(fnamelen);
346 *(p + fnamelen / 4) = 0;
347 memcpy(p, fname, fnamelen);
348 p += (fnamelen + 3) / 4;
350 len = (uint32_t *)p - (uint32_t *)&(data[0]);
352 rpc_req(PROG_NFS, NFS_LOOKUP, data, len);
353 } else { /* NFSV3_FLAG */
354 *p++ = htonl(NFS_FHSIZE); /* Dir handle length */
355 memcpy(p, dirfh, NFS_FHSIZE);
356 p += (NFS_FHSIZE / 4);
357 *p++ = htonl(fnamelen);
359 *(p + fnamelen / 4) = 0;
360 memcpy(p, fname, fnamelen);
361 p += (fnamelen + 3) / 4;
363 len = (uint32_t *)p - (uint32_t *)&(data[0]);
365 rpc_req(PROG_NFS, NFS3PROC_LOOKUP, data, len);
369 /**************************************************************************
370 NFS_READ - Read File on NFS Server
371 **************************************************************************/
372 static void nfs_read_req(int offset, int readlen)
379 p = rpc_add_credentials(p);
381 if (supported_nfs_versions & NFSV2_FLAG) {
382 memcpy(p, filefh, NFS_FHSIZE);
383 p += (NFS_FHSIZE / 4);
384 *p++ = htonl(offset);
385 *p++ = htonl(readlen);
387 } else { /* NFSV3_FLAG */
388 *p++ = htonl(filefh3_length);
389 memcpy(p, filefh, filefh3_length);
390 p += (filefh3_length / 4);
391 *p++ = htonl(0); /* offset is 64-bit long, so fill with 0 */
392 *p++ = htonl(offset);
393 *p++ = htonl(readlen);
397 len = (uint32_t *)p - (uint32_t *)&(data[0]);
399 rpc_req(PROG_NFS, NFS_READ, data, len);
402 /**************************************************************************
403 RPC request dispatcher
404 **************************************************************************/
405 static void nfs_send(void)
407 debug("%s\n", __func__);
410 case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
411 if (supported_nfs_versions & NFSV2_FLAG)
412 rpc_lookup_req(PROG_MOUNT, 1);
413 else /* NFSV3_FLAG */
414 rpc_lookup_req(PROG_MOUNT, 3);
416 case STATE_PRCLOOKUP_PROG_NFS_REQ:
417 if (supported_nfs_versions & NFSV2_FLAG)
418 rpc_lookup_req(PROG_NFS, 2);
419 else /* NFSV3_FLAG */
420 rpc_lookup_req(PROG_NFS, 3);
422 case STATE_MOUNT_REQ:
423 nfs_mount_req(nfs_path);
425 case STATE_UMOUNT_REQ:
428 case STATE_LOOKUP_REQ:
429 nfs_lookup_req(nfs_filename);
432 nfs_read_req(nfs_offset, nfs_len);
434 case STATE_READLINK_REQ:
440 /**************************************************************************
441 Handlers for the reply from server
442 **************************************************************************/
444 static int rpc_lookup_reply(int prog, uchar *pkt, unsigned len)
446 struct rpc_t rpc_pkt;
448 memcpy(&rpc_pkt.u.data[0], pkt, len);
450 debug("%s\n", __func__);
452 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
454 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
455 return -NFS_RPC_DROP;
457 if (rpc_pkt.u.reply.rstatus ||
458 rpc_pkt.u.reply.verifier ||
459 rpc_pkt.u.reply.astatus)
464 nfs_server_mount_port = ntohl(rpc_pkt.u.reply.data[0]);
467 nfs_server_port = ntohl(rpc_pkt.u.reply.data[0]);
474 static int nfs_mount_reply(uchar *pkt, unsigned len)
476 struct rpc_t rpc_pkt;
478 debug("%s\n", __func__);
480 memcpy(&rpc_pkt.u.data[0], pkt, len);
482 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
484 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
485 return -NFS_RPC_DROP;
487 if (rpc_pkt.u.reply.rstatus ||
488 rpc_pkt.u.reply.verifier ||
489 rpc_pkt.u.reply.astatus ||
490 rpc_pkt.u.reply.data[0])
494 /* NFSv2 and NFSv3 use same structure */
495 memcpy(dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
500 static int nfs_umountall_reply(uchar *pkt, unsigned len)
502 struct rpc_t rpc_pkt;
504 debug("%s\n", __func__);
506 memcpy(&rpc_pkt.u.data[0], pkt, len);
508 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
510 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
511 return -NFS_RPC_DROP;
513 if (rpc_pkt.u.reply.rstatus ||
514 rpc_pkt.u.reply.verifier ||
515 rpc_pkt.u.reply.astatus)
519 memset(dirfh, 0, sizeof(dirfh));
524 static int nfs_lookup_reply(uchar *pkt, unsigned len)
526 struct rpc_t rpc_pkt;
528 debug("%s\n", __func__);
530 memcpy(&rpc_pkt.u.data[0], pkt, len);
532 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
534 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
535 return -NFS_RPC_DROP;
537 if (rpc_pkt.u.reply.rstatus ||
538 rpc_pkt.u.reply.verifier ||
539 rpc_pkt.u.reply.astatus ||
540 rpc_pkt.u.reply.data[0]) {
541 switch (ntohl(rpc_pkt.u.reply.astatus)) {
542 case NFS_RPC_SUCCESS: /* Not an error */
544 case NFS_RPC_PROG_MISMATCH:
545 /* Remote can't support NFS version */
546 switch (ntohl(rpc_pkt.u.reply.data[0])) {
547 /* Minimal supported NFS version */
549 debug("*** Waring: NFS version not supported: Requested: V%d, accepted: min V%d - max V%d\n",
550 (supported_nfs_versions & NFSV2_FLAG) ?
552 ntohl(rpc_pkt.u.reply.data[0]),
553 ntohl(rpc_pkt.u.reply.data[1]));
554 debug("Will retry with NFSv3\n");
555 /* Clear NFSV2_FLAG from supported versions */
556 supported_nfs_versions &= ~NFSV2_FLAG;
557 return -NFS_RPC_PROG_MISMATCH;
560 puts("*** ERROR: NFS version not supported");
561 debug(": Requested: V%d, accepted: min V%d - max V%d\n",
562 (supported_nfs_versions & NFSV2_FLAG) ?
564 ntohl(rpc_pkt.u.reply.data[0]),
565 ntohl(rpc_pkt.u.reply.data[1]));
569 case NFS_RPC_PROG_UNAVAIL:
570 case NFS_RPC_PROC_UNAVAIL:
571 case NFS_RPC_GARBAGE_ARGS:
572 case NFS_RPC_SYSTEM_ERR:
573 default: /* Unknown error on 'accept state' flag */
574 debug("*** ERROR: accept state error (%d)\n",
575 ntohl(rpc_pkt.u.reply.astatus));
581 if (supported_nfs_versions & NFSV2_FLAG) {
582 memcpy(filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
583 } else { /* NFSV3_FLAG */
584 filefh3_length = ntohl(rpc_pkt.u.reply.data[1]);
585 if (filefh3_length > NFS3_FHSIZE)
586 filefh3_length = NFS3_FHSIZE;
587 memcpy(filefh, rpc_pkt.u.reply.data + 2, filefh3_length);
593 static int nfs3_get_attributes_offset(uint32_t *data)
595 if (ntohl(data[1]) != 0) {
596 /* 'attributes_follow' flag is TRUE,
597 * so we have attributes on 21 dwords */
598 /* Skip unused values :
601 nlink; 32 bits value,
608 fileid; 64 bits value,
609 atime; 64 bits value,
610 mtime; 64 bits value,
611 ctime; 64 bits value,
615 /* 'attributes_follow' flag is FALSE,
616 * so we don't have any attributes */
621 static int nfs_readlink_reply(uchar *pkt, unsigned len)
623 struct rpc_t rpc_pkt;
625 int nfsv3_data_offset = 0;
627 debug("%s\n", __func__);
629 memcpy((unsigned char *)&rpc_pkt, pkt, len);
631 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
633 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
634 return -NFS_RPC_DROP;
636 if (rpc_pkt.u.reply.rstatus ||
637 rpc_pkt.u.reply.verifier ||
638 rpc_pkt.u.reply.astatus ||
639 rpc_pkt.u.reply.data[0])
642 if (!(supported_nfs_versions & NFSV2_FLAG)) { /* NFSV3_FLAG */
644 nfs3_get_attributes_offset(rpc_pkt.u.reply.data);
647 /* new path length */
648 rlen = ntohl(rpc_pkt.u.reply.data[1 + nfsv3_data_offset]);
650 if (*((char *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset])) != '/') {
653 strcat(nfs_path, "/");
654 pathlen = strlen(nfs_path);
655 memcpy(nfs_path + pathlen,
656 (uchar *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset]),
658 nfs_path[pathlen + rlen] = 0;
661 (uchar *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset]),
668 static int nfs_read_reply(uchar *pkt, unsigned len)
670 struct rpc_t rpc_pkt;
674 debug("%s\n", __func__);
676 memcpy(&rpc_pkt.u.data[0], pkt, sizeof(rpc_pkt.u.reply));
678 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
680 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
681 return -NFS_RPC_DROP;
683 if (rpc_pkt.u.reply.rstatus ||
684 rpc_pkt.u.reply.verifier ||
685 rpc_pkt.u.reply.astatus ||
686 rpc_pkt.u.reply.data[0]) {
687 if (rpc_pkt.u.reply.rstatus)
689 if (rpc_pkt.u.reply.astatus)
691 return -ntohl(rpc_pkt.u.reply.data[0]);
694 if ((nfs_offset != 0) && !((nfs_offset) %
695 (NFS_READ_SIZE / 2 * 10 * HASHES_PER_LINE)))
697 if (!(nfs_offset % ((NFS_READ_SIZE / 2) * 10)))
700 if (supported_nfs_versions & NFSV2_FLAG) {
701 rlen = ntohl(rpc_pkt.u.reply.data[18]);
702 data_ptr = (uchar *)&(rpc_pkt.u.reply.data[19]);
703 } else { /* NFSV3_FLAG */
704 int nfsv3_data_offset =
705 nfs3_get_attributes_offset(rpc_pkt.u.reply.data);
708 rlen = ntohl(rpc_pkt.u.reply.data[1 + nfsv3_data_offset]);
709 /* Skip unused values :
711 data_size: 32 bits value,
714 &(rpc_pkt.u.reply.data[4 + nfsv3_data_offset]);
717 if (store_block(data_ptr, nfs_offset, rlen))
723 /**************************************************************************
725 **************************************************************************/
726 static void nfs_timeout_handler(void)
728 if (++nfs_timeout_count > NFS_RETRY_COUNT) {
729 puts("\nRetry count exceeded; starting again\n");
733 net_set_timeout_handler(nfs_timeout +
734 NFS_TIMEOUT * nfs_timeout_count,
735 nfs_timeout_handler);
740 static void nfs_handler(uchar *pkt, unsigned dest, struct in_addr sip,
741 unsigned src, unsigned len)
746 debug("%s\n", __func__);
748 if (dest != nfs_our_port)
752 case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
753 if (rpc_lookup_reply(PROG_MOUNT, pkt, len) == -NFS_RPC_DROP)
755 nfs_state = STATE_PRCLOOKUP_PROG_NFS_REQ;
759 case STATE_PRCLOOKUP_PROG_NFS_REQ:
760 if (rpc_lookup_reply(PROG_NFS, pkt, len) == -NFS_RPC_DROP)
762 nfs_state = STATE_MOUNT_REQ;
766 case STATE_MOUNT_REQ:
767 reply = nfs_mount_reply(pkt, len);
768 if (reply == -NFS_RPC_DROP) {
770 } else if (reply == -NFS_RPC_ERR) {
771 puts("*** ERROR: Cannot mount\n");
772 /* just to be sure... */
773 nfs_state = STATE_UMOUNT_REQ;
776 nfs_state = STATE_LOOKUP_REQ;
781 case STATE_UMOUNT_REQ:
782 reply = nfs_umountall_reply(pkt, len);
783 if (reply == -NFS_RPC_DROP) {
785 } else if (reply == -NFS_RPC_ERR) {
786 debug("*** ERROR: Cannot umount\n");
787 net_set_state(NETLOOP_FAIL);
790 net_set_state(nfs_download_state);
794 case STATE_LOOKUP_REQ:
795 reply = nfs_lookup_reply(pkt, len);
796 if (reply == -NFS_RPC_DROP) {
798 } else if (reply == -NFS_RPC_ERR) {
799 puts("*** ERROR: File lookup fail\n");
800 nfs_state = STATE_UMOUNT_REQ;
802 } else if (reply == -NFS_RPC_PROG_MISMATCH &&
803 supported_nfs_versions != 0) {
805 nfs_state = STATE_UMOUNT_REQ;
807 /* And retry with another supported version */
808 nfs_state = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
811 nfs_state = STATE_READ_REQ;
813 nfs_len = NFS_READ_SIZE;
818 case STATE_READLINK_REQ:
819 reply = nfs_readlink_reply(pkt, len);
820 if (reply == -NFS_RPC_DROP) {
822 } else if (reply == -NFS_RPC_ERR) {
823 puts("*** ERROR: Symlink fail\n");
824 nfs_state = STATE_UMOUNT_REQ;
827 debug("Symlink --> %s\n", nfs_path);
828 nfs_filename = basename(nfs_path);
829 nfs_path = dirname(nfs_path);
831 nfs_state = STATE_MOUNT_REQ;
837 rlen = nfs_read_reply(pkt, len);
838 net_set_timeout_handler(nfs_timeout, nfs_timeout_handler);
842 } else if ((rlen == -NFSERR_ISDIR) || (rlen == -NFSERR_INVAL)) {
844 nfs_state = STATE_READLINK_REQ;
848 nfs_download_state = NETLOOP_SUCCESS;
850 debug("NFS READ error (%d)\n", rlen);
851 nfs_state = STATE_UMOUNT_REQ;
861 debug("%s\n", __func__);
862 nfs_download_state = NETLOOP_FAIL;
864 nfs_server_ip = net_server_ip;
865 nfs_path = (char *)nfs_path_buff;
867 if (nfs_path == NULL) {
868 net_set_state(NETLOOP_FAIL);
869 debug("*** ERROR: Fail allocate memory\n");
873 if (net_boot_file_name[0] == '\0') {
874 sprintf(nfs_path, "/nfsroot/%02X%02X%02X%02X.img",
875 net_ip.s_addr & 0xFF,
876 (net_ip.s_addr >> 8) & 0xFF,
877 (net_ip.s_addr >> 16) & 0xFF,
878 (net_ip.s_addr >> 24) & 0xFF);
880 debug("*** Warning: no boot file name; using '%s'\n",
883 char *p = net_boot_file_name;
888 nfs_server_ip = string_to_ip(net_boot_file_name);
892 strcpy(nfs_path, net_boot_file_name);
896 nfs_filename = basename(nfs_path);
897 nfs_path = dirname(nfs_path);
899 debug("Using %s device\n", eth_get_name());
901 debug("File transfer via NFS from server %pI4; our IP address is %pI4",
902 &nfs_server_ip, &net_ip);
904 /* Check if we need to send across this subnet */
905 if (net_gateway.s_addr && net_netmask.s_addr) {
906 struct in_addr our_net;
907 struct in_addr server_net;
909 our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
910 server_net.s_addr = net_server_ip.s_addr & net_netmask.s_addr;
911 if (our_net.s_addr != server_net.s_addr)
912 debug("; sending through gateway %pI4",
915 debug("\nFilename '%s/%s'.", nfs_path, nfs_filename);
917 if (net_boot_file_expected_size_in_blocks) {
918 debug(" Size is 0x%x Bytes = ",
919 net_boot_file_expected_size_in_blocks << 9);
920 print_size(net_boot_file_expected_size_in_blocks << 9, "");
922 debug("\nLoad address: 0x%lx\nLoading: *\b", load_addr);
924 net_set_timeout_handler(nfs_timeout, nfs_timeout_handler);
925 net_set_udp_handler(nfs_handler);
927 nfs_timeout_count = 0;
928 nfs_state = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
930 /*nfs_our_port = 4096 + (get_ticks() % 3072);*/
934 /* zero out server ether in case the server ip has changed */
935 memset(net_server_ethaddr, 0, 6);