/* * NFS support driver - based on etherboot and U-BOOT's tftp.c * * Masami Komiya 2004 * */ /* NOTE: the NFS code is heavily inspired by the NetBSD netboot code (read: * large portions are copied verbatim) as distributed in OSKit 0.97. A few * changes were necessary to adapt the code to Etherboot and to fix several * inconsistencies. Also the RPC message preparation is done "by hand" to * avoid adding netsprintf() which I find hard to understand and use. */ /* NOTE 2: Etherboot does not care about things beyond the kernel image, so * it loads the kernel image off the boot server (ARP_SERVER) and does not * access the client root disk (root-path in dhcpd.conf), which would use * ARP_ROOTSERVER. The root disk is something the operating system we are * about to load needs to use. This is different from the OSKit 0.97 logic. */ /* NOTE 3: Symlink handling introduced by Anselm M Hoffmeister, 2003-July-14 * If a symlink is encountered, it is followed as far as possible (recursion * possible, maximum 16 steps). There is no clearing of ".."'s inside the * path, so please DON'T DO THAT. thx. */ /* NOTE 4: NFSv3 support added by Guillaume GARDET, 2016-June-20. * NFSv2 is still used by default. But if server does not support NFSv2, then * NFSv3 is used, if available on NFS server. */ #include #include #include #include #include #include #include "nfs.h" #include "bootp.h" #include #define HASHES_PER_LINE 65 /* Number of "loading" hashes per line */ #define NFS_RETRY_COUNT 30 #ifndef CONFIG_NFS_TIMEOUT # define NFS_TIMEOUT 2000UL #else # define NFS_TIMEOUT CONFIG_NFS_TIMEOUT #endif #define NFS_RPC_ERR 1 #define NFS_RPC_DROP 124 static int fs_mounted; static unsigned long rpc_id; static int nfs_offset = -1; static int nfs_len; static ulong nfs_timeout = NFS_TIMEOUT; static char dirfh[NFS_FHSIZE]; /* NFSv2 / NFSv3 file handle of directory */ static char filefh[NFS3_FHSIZE]; /* NFSv2 / NFSv3 file handle */ static int filefh3_length; /* (variable) length of filefh when NFSv3 */ static enum net_loop_state nfs_download_state; static struct in_addr nfs_server_ip; static int nfs_server_mount_port; static int nfs_server_port; static int nfs_our_port; static int nfs_timeout_count; static int nfs_state; #define STATE_PRCLOOKUP_PROG_MOUNT_REQ 1 #define STATE_PRCLOOKUP_PROG_NFS_REQ 2 #define STATE_MOUNT_REQ 3 #define STATE_UMOUNT_REQ 4 #define STATE_LOOKUP_REQ 5 #define STATE_READ_REQ 6 #define STATE_READLINK_REQ 7 static char *nfs_filename; static char *nfs_path; static char nfs_path_buff[2048]; #define NFSV2_FLAG 1 #define NFSV3_FLAG 1 << 1 static char supported_nfs_versions = NFSV2_FLAG | NFSV3_FLAG; static inline int store_block(uchar *src, unsigned offset, unsigned len) { ulong newsize = offset + len; #ifdef CONFIG_SYS_DIRECT_FLASH_NFS int i, rc = 0; for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { /* start address in flash? */ if (image_load_addr + offset >= flash_info[i].start[0]) { rc = 1; break; } } if (rc) { /* Flash is destination for this packet */ rc = flash_write((uchar *)src, (ulong)image_load_addr + offset, len); if (rc) { flash_perror(rc); return -1; } } else #endif /* CONFIG_SYS_DIRECT_FLASH_NFS */ { void *ptr = map_sysmem(image_load_addr + offset, len); memcpy(ptr, src, len); unmap_sysmem(ptr); } if (net_boot_file_size < (offset + len)) net_boot_file_size = newsize; return 0; } static char *basename(char *path) { char *fname; fname = path + strlen(path) - 1; while (fname >= path) { if (*fname == '/') { fname++; break; } fname--; } return fname; } static char *dirname(char *path) { char *fname; fname = basename(path); --fname; *fname = '\0'; return path; } /************************************************************************** RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries **************************************************************************/ static uint32_t *rpc_add_credentials(uint32_t *p) { /* Here's the executive summary on authentication requirements of the * various NFS server implementations: Linux accepts both AUTH_NONE * and AUTH_UNIX authentication (also accepts an empty hostname field * in the AUTH_UNIX scheme). *BSD refuses AUTH_NONE, but accepts * AUTH_UNIX (also accepts an empty hostname field in the AUTH_UNIX * scheme). To be safe, use AUTH_UNIX and pass the hostname if we have * it (if the BOOTP/DHCP reply didn't give one, just use an empty * hostname). */ /* Provide an AUTH_UNIX credential. */ *p++ = htonl(1); /* AUTH_UNIX */ *p++ = htonl(20); /* auth length */ *p++ = 0; /* stamp */ *p++ = 0; /* hostname string */ *p++ = 0; /* uid */ *p++ = 0; /* gid */ *p++ = 0; /* auxiliary gid list */ /* Provide an AUTH_NONE verifier. */ *p++ = 0; /* AUTH_NONE */ *p++ = 0; /* auth length */ return p; } /************************************************************************** RPC_LOOKUP - Lookup RPC Port numbers **************************************************************************/ static void rpc_req(int rpc_prog, int rpc_proc, uint32_t *data, int datalen) { struct rpc_t rpc_pkt; unsigned long id; uint32_t *p; int pktlen; int sport; id = ++rpc_id; rpc_pkt.u.call.id = htonl(id); rpc_pkt.u.call.type = htonl(MSG_CALL); rpc_pkt.u.call.rpcvers = htonl(2); /* use RPC version 2 */ rpc_pkt.u.call.prog = htonl(rpc_prog); switch (rpc_prog) { case PROG_NFS: if (supported_nfs_versions & NFSV2_FLAG) rpc_pkt.u.call.vers = htonl(2); /* NFS v2 */ else /* NFSV3_FLAG */ rpc_pkt.u.call.vers = htonl(3); /* NFS v3 */ break; case PROG_PORTMAP: case PROG_MOUNT: default: rpc_pkt.u.call.vers = htonl(2); /* portmapper is version 2 */ } rpc_pkt.u.call.proc = htonl(rpc_proc); p = rpc_pkt.u.call.data; if (datalen) memcpy(p, data, datalen * sizeof(uint32_t)); pktlen = (char *)p + datalen * sizeof(uint32_t) - (char *)&rpc_pkt; memcpy((char *)net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE, &rpc_pkt.u.data[0], pktlen); if (rpc_prog == PROG_PORTMAP) sport = SUNRPC_PORT; else if (rpc_prog == PROG_MOUNT) sport = nfs_server_mount_port; else sport = nfs_server_port; net_send_udp_packet(net_server_ethaddr, nfs_server_ip, sport, nfs_our_port, pktlen); } /************************************************************************** RPC_LOOKUP - Lookup RPC Port numbers **************************************************************************/ static void rpc_lookup_req(int prog, int ver) { uint32_t data[16]; data[0] = 0; data[1] = 0; /* auth credential */ data[2] = 0; data[3] = 0; /* auth verifier */ data[4] = htonl(prog); data[5] = htonl(ver); data[6] = htonl(17); /* IP_UDP */ data[7] = 0; rpc_req(PROG_PORTMAP, PORTMAP_GETPORT, data, 8); } /************************************************************************** NFS_MOUNT - Mount an NFS Filesystem **************************************************************************/ static void nfs_mount_req(char *path) { uint32_t data[1024]; uint32_t *p; int len; int pathlen; pathlen = strlen(path); p = &(data[0]); p = rpc_add_credentials(p); *p++ = htonl(pathlen); if (pathlen & 3) *(p + pathlen / 4) = 0; memcpy(p, path, pathlen); p += (pathlen + 3) / 4; len = (uint32_t *)p - (uint32_t *)&(data[0]); rpc_req(PROG_MOUNT, MOUNT_ADDENTRY, data, len); } /************************************************************************** NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server **************************************************************************/ static void nfs_umountall_req(void) { uint32_t data[1024]; uint32_t *p; int len; if ((nfs_server_mount_port == -1) || (!fs_mounted)) /* Nothing mounted, nothing to umount */ return; p = &(data[0]); p = rpc_add_credentials(p); len = (uint32_t *)p - (uint32_t *)&(data[0]); rpc_req(PROG_MOUNT, MOUNT_UMOUNTALL, data, len); } /*************************************************************************** * NFS_READLINK (AH 2003-07-14) * This procedure is called when read of the first block fails - * this probably happens when it's a directory or a symlink * In case of successful readlink(), the dirname is manipulated, * so that inside the nfs() function a recursion can be done. **************************************************************************/ static void nfs_readlink_req(void) { uint32_t data[1024]; uint32_t *p; int len; p = &(data[0]); p = rpc_add_credentials(p); if (supported_nfs_versions & NFSV2_FLAG) { memcpy(p, filefh, NFS_FHSIZE); p += (NFS_FHSIZE / 4); } else { /* NFSV3_FLAG */ *p++ = htonl(filefh3_length); memcpy(p, filefh, filefh3_length); p += (filefh3_length / 4); } len = (uint32_t *)p - (uint32_t *)&(data[0]); rpc_req(PROG_NFS, NFS_READLINK, data, len); } /************************************************************************** NFS_LOOKUP - Lookup Pathname **************************************************************************/ static void nfs_lookup_req(char *fname) { uint32_t data[1024]; uint32_t *p; int len; int fnamelen; fnamelen = strlen(fname); p = &(data[0]); p = rpc_add_credentials(p); if (supported_nfs_versions & NFSV2_FLAG) { memcpy(p, dirfh, NFS_FHSIZE); p += (NFS_FHSIZE / 4); *p++ = htonl(fnamelen); if (fnamelen & 3) *(p + fnamelen / 4) = 0; memcpy(p, fname, fnamelen); p += (fnamelen + 3) / 4; len = (uint32_t *)p - (uint32_t *)&(data[0]); rpc_req(PROG_NFS, NFS_LOOKUP, data, len); } else { /* NFSV3_FLAG */ *p++ = htonl(NFS_FHSIZE); /* Dir handle length */ memcpy(p, dirfh, NFS_FHSIZE); p += (NFS_FHSIZE / 4); *p++ = htonl(fnamelen); if (fnamelen & 3) *(p + fnamelen / 4) = 0; memcpy(p, fname, fnamelen); p += (fnamelen + 3) / 4; len = (uint32_t *)p - (uint32_t *)&(data[0]); rpc_req(PROG_NFS, NFS3PROC_LOOKUP, data, len); } } /************************************************************************** NFS_READ - Read File on NFS Server **************************************************************************/ static void nfs_read_req(int offset, int readlen) { uint32_t data[1024]; uint32_t *p; int len; p = &(data[0]); p = rpc_add_credentials(p); if (supported_nfs_versions & NFSV2_FLAG) { memcpy(p, filefh, NFS_FHSIZE); p += (NFS_FHSIZE / 4); *p++ = htonl(offset); *p++ = htonl(readlen); *p++ = 0; } else { /* NFSV3_FLAG */ *p++ = htonl(filefh3_length); memcpy(p, filefh, filefh3_length); p += (filefh3_length / 4); *p++ = htonl(0); /* offset is 64-bit long, so fill with 0 */ *p++ = htonl(offset); *p++ = htonl(readlen); *p++ = 0; } len = (uint32_t *)p - (uint32_t *)&(data[0]); rpc_req(PROG_NFS, NFS_READ, data, len); } /************************************************************************** RPC request dispatcher **************************************************************************/ static void nfs_send(void) { debug("%s\n", __func__); switch (nfs_state) { case STATE_PRCLOOKUP_PROG_MOUNT_REQ: if (supported_nfs_versions & NFSV2_FLAG) rpc_lookup_req(PROG_MOUNT, 1); else /* NFSV3_FLAG */ rpc_lookup_req(PROG_MOUNT, 3); break; case STATE_PRCLOOKUP_PROG_NFS_REQ: if (supported_nfs_versions & NFSV2_FLAG) rpc_lookup_req(PROG_NFS, 2); else /* NFSV3_FLAG */ rpc_lookup_req(PROG_NFS, 3); break; case STATE_MOUNT_REQ: nfs_mount_req(nfs_path); break; case STATE_UMOUNT_REQ: nfs_umountall_req(); break; case STATE_LOOKUP_REQ: nfs_lookup_req(nfs_filename); break; case STATE_READ_REQ: nfs_read_req(nfs_offset, nfs_len); break; case STATE_READLINK_REQ: nfs_readlink_req(); break; } } /************************************************************************** Handlers for the reply from server **************************************************************************/ static int rpc_lookup_reply(int prog, uchar *pkt, unsigned len) { struct rpc_t rpc_pkt; memcpy(&rpc_pkt.u.data[0], pkt, len); debug("%s\n", __func__); if (ntohl(rpc_pkt.u.reply.id) > rpc_id) return -NFS_RPC_ERR; else if (ntohl(rpc_pkt.u.reply.id) < rpc_id) return -NFS_RPC_DROP; if (rpc_pkt.u.reply.rstatus || rpc_pkt.u.reply.verifier || rpc_pkt.u.reply.astatus) return -1; switch (prog) { case PROG_MOUNT: nfs_server_mount_port = ntohl(rpc_pkt.u.reply.data[0]); break; case PROG_NFS: nfs_server_port = ntohl(rpc_pkt.u.reply.data[0]); break; } return 0; } static int nfs_mount_reply(uchar *pkt, unsigned len) { struct rpc_t rpc_pkt; debug("%s\n", __func__); memcpy(&rpc_pkt.u.data[0], pkt, len); if (ntohl(rpc_pkt.u.reply.id) > rpc_id) return -NFS_RPC_ERR; else if (ntohl(rpc_pkt.u.reply.id) < rpc_id) return -NFS_RPC_DROP; if (rpc_pkt.u.reply.rstatus || rpc_pkt.u.reply.verifier || rpc_pkt.u.reply.astatus || rpc_pkt.u.reply.data[0]) return -1; fs_mounted = 1; /* NFSv2 and NFSv3 use same structure */ memcpy(dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE); return 0; } static int nfs_umountall_reply(uchar *pkt, unsigned len) { struct rpc_t rpc_pkt; debug("%s\n", __func__); memcpy(&rpc_pkt.u.data[0], pkt, len); if (ntohl(rpc_pkt.u.reply.id) > rpc_id) return -NFS_RPC_ERR; else if (ntohl(rpc_pkt.u.reply.id) < rpc_id) return -NFS_RPC_DROP; if (rpc_pkt.u.reply.rstatus || rpc_pkt.u.reply.verifier || rpc_pkt.u.reply.astatus) return -1; fs_mounted = 0; memset(dirfh, 0, sizeof(dirfh)); return 0; } static int nfs_lookup_reply(uchar *pkt, unsigned len) { struct rpc_t rpc_pkt; debug("%s\n", __func__); memcpy(&rpc_pkt.u.data[0], pkt, len); if (ntohl(rpc_pkt.u.reply.id) > rpc_id) return -NFS_RPC_ERR; else if (ntohl(rpc_pkt.u.reply.id) < rpc_id) return -NFS_RPC_DROP; if (rpc_pkt.u.reply.rstatus || rpc_pkt.u.reply.verifier || rpc_pkt.u.reply.astatus || rpc_pkt.u.reply.data[0]) { switch (ntohl(rpc_pkt.u.reply.astatus)) { case NFS_RPC_SUCCESS: /* Not an error */ break; case NFS_RPC_PROG_MISMATCH: /* Remote can't support NFS version */ switch (ntohl(rpc_pkt.u.reply.data[0])) { /* Minimal supported NFS version */ case 3: debug("*** Warning: NFS version not supported: Requested: V%d, accepted: min V%d - max V%d\n", (supported_nfs_versions & NFSV2_FLAG) ? 2 : 3, ntohl(rpc_pkt.u.reply.data[0]), ntohl(rpc_pkt.u.reply.data[1])); debug("Will retry with NFSv3\n"); /* Clear NFSV2_FLAG from supported versions */ supported_nfs_versions &= ~NFSV2_FLAG; return -NFS_RPC_PROG_MISMATCH; case 4: default: puts("*** ERROR: NFS version not supported"); debug(": Requested: V%d, accepted: min V%d - max V%d\n", (supported_nfs_versions & NFSV2_FLAG) ? 2 : 3, ntohl(rpc_pkt.u.reply.data[0]), ntohl(rpc_pkt.u.reply.data[1])); puts("\n"); } break; case NFS_RPC_PROG_UNAVAIL: case NFS_RPC_PROC_UNAVAIL: case NFS_RPC_GARBAGE_ARGS: case NFS_RPC_SYSTEM_ERR: default: /* Unknown error on 'accept state' flag */ debug("*** ERROR: accept state error (%d)\n", ntohl(rpc_pkt.u.reply.astatus)); break; } return -1; } if (supported_nfs_versions & NFSV2_FLAG) { if (((uchar *)&(rpc_pkt.u.reply.data[0]) - (uchar *)(&rpc_pkt) + NFS_FHSIZE) > len) return -NFS_RPC_DROP; memcpy(filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE); } else { /* NFSV3_FLAG */ filefh3_length = ntohl(rpc_pkt.u.reply.data[1]); if (filefh3_length > NFS3_FHSIZE) filefh3_length = NFS3_FHSIZE; if (((uchar *)&(rpc_pkt.u.reply.data[0]) - (uchar *)(&rpc_pkt) + filefh3_length) > len) return -NFS_RPC_DROP; memcpy(filefh, rpc_pkt.u.reply.data + 2, filefh3_length); } return 0; } static int nfs3_get_attributes_offset(uint32_t *data) { if (data[1]) { /* 'attributes_follow' flag is TRUE, * so we have attributes on 21 dwords */ /* Skip unused values : type; 32 bits value, mode; 32 bits value, nlink; 32 bits value, uid; 32 bits value, gid; 32 bits value, size; 64 bits value, used; 64 bits value, rdev; 64 bits value, fsid; 64 bits value, fileid; 64 bits value, atime; 64 bits value, mtime; 64 bits value, ctime; 64 bits value, */ return 22; } else { /* 'attributes_follow' flag is FALSE, * so we don't have any attributes */ return 1; } } static int nfs_readlink_reply(uchar *pkt, unsigned len) { struct rpc_t rpc_pkt; int rlen; int nfsv3_data_offset = 0; debug("%s\n", __func__); memcpy((unsigned char *)&rpc_pkt, pkt, len); if (ntohl(rpc_pkt.u.reply.id) > rpc_id) return -NFS_RPC_ERR; else if (ntohl(rpc_pkt.u.reply.id) < rpc_id) return -NFS_RPC_DROP; if (rpc_pkt.u.reply.rstatus || rpc_pkt.u.reply.verifier || rpc_pkt.u.reply.astatus || rpc_pkt.u.reply.data[0]) return -1; if (!(supported_nfs_versions & NFSV2_FLAG)) { /* NFSV3_FLAG */ nfsv3_data_offset = nfs3_get_attributes_offset(rpc_pkt.u.reply.data); } /* new path length */ rlen = ntohl(rpc_pkt.u.reply.data[1 + nfsv3_data_offset]); if (((uchar *)&(rpc_pkt.u.reply.data[0]) - (uchar *)(&rpc_pkt) + rlen) > len) return -NFS_RPC_DROP; if (*((char *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset])) != '/') { int pathlen; strcat(nfs_path, "/"); pathlen = strlen(nfs_path); memcpy(nfs_path + pathlen, (uchar *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset]), rlen); nfs_path[pathlen + rlen] = 0; } else { memcpy(nfs_path, (uchar *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset]), rlen); nfs_path[rlen] = 0; } return 0; } static int nfs_read_reply(uchar *pkt, unsigned len) { struct rpc_t rpc_pkt; int rlen; uchar *data_ptr; debug("%s\n", __func__); memcpy(&rpc_pkt.u.data[0], pkt, sizeof(rpc_pkt.u.reply)); if (ntohl(rpc_pkt.u.reply.id) > rpc_id) return -NFS_RPC_ERR; else if (ntohl(rpc_pkt.u.reply.id) < rpc_id) return -NFS_RPC_DROP; if (rpc_pkt.u.reply.rstatus || rpc_pkt.u.reply.verifier || rpc_pkt.u.reply.astatus || rpc_pkt.u.reply.data[0]) { if (rpc_pkt.u.reply.rstatus) return -9999; if (rpc_pkt.u.reply.astatus) return -9999; return -ntohl(rpc_pkt.u.reply.data[0]); } if ((nfs_offset != 0) && !((nfs_offset) % (NFS_READ_SIZE / 2 * 10 * HASHES_PER_LINE))) puts("\n\t "); if (!(nfs_offset % ((NFS_READ_SIZE / 2) * 10))) putc('#'); if (supported_nfs_versions & NFSV2_FLAG) { rlen = ntohl(rpc_pkt.u.reply.data[18]); data_ptr = (uchar *)&(rpc_pkt.u.reply.data[19]); } else { /* NFSV3_FLAG */ int nfsv3_data_offset = nfs3_get_attributes_offset(rpc_pkt.u.reply.data); /* count value */ rlen = ntohl(rpc_pkt.u.reply.data[1 + nfsv3_data_offset]); /* Skip unused values : EOF: 32 bits value, data_size: 32 bits value, */ data_ptr = (uchar *) &(rpc_pkt.u.reply.data[4 + nfsv3_data_offset]); } if (((uchar *)&(rpc_pkt.u.reply.data[0]) - (uchar *)(&rpc_pkt) + rlen) > len) return -9999; if (store_block(data_ptr, nfs_offset, rlen)) return -9999; return rlen; } /************************************************************************** Interfaces of U-BOOT **************************************************************************/ static void nfs_timeout_handler(void) { if (++nfs_timeout_count > NFS_RETRY_COUNT) { puts("\nRetry count exceeded; starting again\n"); net_start_again(); } else { puts("T "); net_set_timeout_handler(nfs_timeout + NFS_TIMEOUT * nfs_timeout_count, nfs_timeout_handler); nfs_send(); } } static void nfs_handler(uchar *pkt, unsigned dest, struct in_addr sip, unsigned src, unsigned len) { int rlen; int reply; debug("%s\n", __func__); if (len > sizeof(struct rpc_t)) return; if (dest != nfs_our_port) return; switch (nfs_state) { case STATE_PRCLOOKUP_PROG_MOUNT_REQ: if (rpc_lookup_reply(PROG_MOUNT, pkt, len) == -NFS_RPC_DROP) break; nfs_state = STATE_PRCLOOKUP_PROG_NFS_REQ; nfs_send(); break; case STATE_PRCLOOKUP_PROG_NFS_REQ: if (rpc_lookup_reply(PROG_NFS, pkt, len) == -NFS_RPC_DROP) break; nfs_state = STATE_MOUNT_REQ; nfs_send(); break; case STATE_MOUNT_REQ: reply = nfs_mount_reply(pkt, len); if (reply == -NFS_RPC_DROP) { break; } else if (reply == -NFS_RPC_ERR) { puts("*** ERROR: Cannot mount\n"); /* just to be sure... */ nfs_state = STATE_UMOUNT_REQ; nfs_send(); } else { nfs_state = STATE_LOOKUP_REQ; nfs_send(); } break; case STATE_UMOUNT_REQ: reply = nfs_umountall_reply(pkt, len); if (reply == -NFS_RPC_DROP) { break; } else if (reply == -NFS_RPC_ERR) { debug("*** ERROR: Cannot umount\n"); net_set_state(NETLOOP_FAIL); } else { puts("\ndone\n"); net_set_state(nfs_download_state); } break; case STATE_LOOKUP_REQ: reply = nfs_lookup_reply(pkt, len); if (reply == -NFS_RPC_DROP) { break; } else if (reply == -NFS_RPC_ERR) { puts("*** ERROR: File lookup fail\n"); nfs_state = STATE_UMOUNT_REQ; nfs_send(); } else if (reply == -NFS_RPC_PROG_MISMATCH && supported_nfs_versions != 0) { /* umount */ nfs_state = STATE_UMOUNT_REQ; nfs_send(); /* And retry with another supported version */ nfs_state = STATE_PRCLOOKUP_PROG_MOUNT_REQ; nfs_send(); } else { nfs_state = STATE_READ_REQ; nfs_offset = 0; nfs_len = NFS_READ_SIZE; nfs_send(); } break; case STATE_READLINK_REQ: reply = nfs_readlink_reply(pkt, len); if (reply == -NFS_RPC_DROP) { break; } else if (reply == -NFS_RPC_ERR) { puts("*** ERROR: Symlink fail\n"); nfs_state = STATE_UMOUNT_REQ; nfs_send(); } else { debug("Symlink --> %s\n", nfs_path); nfs_filename = basename(nfs_path); nfs_path = dirname(nfs_path); nfs_state = STATE_MOUNT_REQ; nfs_send(); } break; case STATE_READ_REQ: rlen = nfs_read_reply(pkt, len); if (rlen == -NFS_RPC_DROP) break; net_set_timeout_handler(nfs_timeout, nfs_timeout_handler); if (rlen > 0) { nfs_offset += rlen; nfs_send(); } else if ((rlen == -NFSERR_ISDIR) || (rlen == -NFSERR_INVAL)) { /* symbolic link */ nfs_state = STATE_READLINK_REQ; nfs_send(); } else { if (!rlen) nfs_download_state = NETLOOP_SUCCESS; if (rlen < 0) debug("NFS READ error (%d)\n", rlen); nfs_state = STATE_UMOUNT_REQ; nfs_send(); } break; } } void nfs_start(void) { debug("%s\n", __func__); nfs_download_state = NETLOOP_FAIL; nfs_server_ip = net_server_ip; nfs_path = (char *)nfs_path_buff; if (nfs_path == NULL) { net_set_state(NETLOOP_FAIL); printf("*** ERROR: Fail allocate memory\n"); return; } if (!net_parse_bootfile(&nfs_server_ip, nfs_path, sizeof(nfs_path_buff))) { sprintf(nfs_path, "/nfsroot/%02X%02X%02X%02X.img", net_ip.s_addr & 0xFF, (net_ip.s_addr >> 8) & 0xFF, (net_ip.s_addr >> 16) & 0xFF, (net_ip.s_addr >> 24) & 0xFF); printf("*** Warning: no boot file name; using '%s'\n", nfs_path); } nfs_filename = basename(nfs_path); nfs_path = dirname(nfs_path); printf("Using %s device\n", eth_get_name()); printf("File transfer via NFS from server %pI4; our IP address is %pI4", &nfs_server_ip, &net_ip); /* Check if we need to send across this subnet */ if (net_gateway.s_addr && net_netmask.s_addr) { struct in_addr our_net; struct in_addr server_net; our_net.s_addr = net_ip.s_addr & net_netmask.s_addr; server_net.s_addr = nfs_server_ip.s_addr & net_netmask.s_addr; if (our_net.s_addr != server_net.s_addr) printf("; sending through gateway %pI4", &net_gateway); } printf("\nFilename '%s/%s'.", nfs_path, nfs_filename); if (net_boot_file_expected_size_in_blocks) { printf(" Size is 0x%x Bytes = ", net_boot_file_expected_size_in_blocks << 9); print_size(net_boot_file_expected_size_in_blocks << 9, ""); } printf("\nLoad address: 0x%lx\nLoading: *\b", image_load_addr); net_set_timeout_handler(nfs_timeout, nfs_timeout_handler); net_set_udp_handler(nfs_handler); nfs_timeout_count = 0; nfs_state = STATE_PRCLOOKUP_PROG_MOUNT_REQ; /*nfs_our_port = 4096 + (get_ticks() % 3072);*/ /*FIX ME !!!*/ nfs_our_port = 1000; /* zero out server ether in case the server ip has changed */ memset(net_server_ethaddr, 0, 6); nfs_send(); }