1103770Sjake/*- 2103770Sjake * Copyright (c) 1990 The Regents of the University of California. 3103770Sjake * All rights reserved. 4103770Sjake * 5103770Sjake * This code is derived from software contributed to Berkeley by 6103770Sjake * William Jolitz. 7103770Sjake * 8103770Sjake * Redistribution and use in source and binary forms, with or without 9103770Sjake * modification, are permitted provided that the following conditions 10103770Sjake * are met: 11103770Sjake * 1. Redistributions of source code must retain the above copyright 12103770Sjake * notice, this list of conditions and the following disclaimer. 13103770Sjake * 2. Redistributions in binary form must reproduce the above copyright 14103770Sjake * notice, this list of conditions and the following disclaimer in the 15103770Sjake * documentation and/or other materials provided with the distribution. 16103770Sjake * 4. Neither the name of the University nor the names of its contributors 17103770Sjake * may be used to endorse or promote products derived from this software 18103770Sjake * without specific prior written permission. 19103770Sjake * 20103770Sjake * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21103770Sjake * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22103770Sjake * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23103770Sjake * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24103770Sjake * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25103770Sjake * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26103770Sjake * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27103770Sjake * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28103770Sjake * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29103770Sjake * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30103770Sjake * SUCH DAMAGE. 31103770Sjake * 32103770Sjake * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91 33103770Sjake */ 34103770Sjake 35116189Sobrien#include <sys/cdefs.h> 36116189Sobrien__FBSDID("$FreeBSD$"); 37116189Sobrien 38140122Sbrian#include "opt_bootp.h" 39140122Sbrian 40103770Sjake#include <sys/param.h> 41103770Sjake#include <sys/systm.h> 42218757Sbz#include <sys/jail.h> 43103770Sjake#include <sys/kernel.h> 44103770Sjake#include <sys/malloc.h> 45103770Sjake#include <sys/mount.h> 46103770Sjake#include <sys/socket.h> 47183550Szec 48103770Sjake#include <net/if.h> 49103770Sjake#include <net/if_dl.h> 50103770Sjake#include <net/if_types.h> 51103770Sjake#include <net/if_var.h> 52103770Sjake#include <net/ethernet.h> 53185571Sbz#include <net/vnet.h> 54185571Sbz 55103770Sjake#include <netinet/in.h> 56103770Sjake#include <nfs/nfsproto.h> 57103770Sjake#include <nfsclient/nfs.h> 58221032Srmacklem#include <nfs/nfsdiskless.h> 59103770Sjake 60103770Sjakestatic int inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa); 61103770Sjakestatic int hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa); 62212123Srmacklemstatic int decode_nfshandle(char *ev, u_char *fh, int maxfh); 63103770Sjake 64164934Ssam/* 65221032Srmacklem * This structure must be filled in by a primary bootstrap or bootstrap 66221032Srmacklem * server for a diskless/dataless machine. It is initialized below just 67221032Srmacklem * to ensure that it is allocated to initialized data (.data not .bss). 68221032Srmacklem */ 69221032Srmacklemstruct nfs_diskless nfs_diskless = { { { 0 } } }; 70221032Srmacklemstruct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; 71221032Srmacklemint nfs_diskless_valid = 0; 72221032Srmacklem 73221032Srmacklem/* 74164934Ssam * Validate/sanity check a rsize/wsize parameter. 75164934Ssam */ 76164934Ssamstatic int 77164934Ssamcheckrwsize(unsigned long v, const char *name) 78150995Spjd{ 79164934Ssam /* 80164934Ssam * 32K is used as an upper bound because most servers 81164934Ssam * limit block size to satisfy IPv4's limit of 82164934Ssam * 64K/reassembled packet. The lower bound is pretty 83164934Ssam * much arbitrary. 84164934Ssam */ 85164934Ssam if (!(4 <= v && v <= 32*1024)) { 86164934Ssam printf("nfs_parse_options: invalid %s %lu ignored\n", name, v); 87164934Ssam return 0; 88164934Ssam } else 89164934Ssam return 1; 90164934Ssam} 91164934Ssam 92164934Ssam/* 93164934Ssam * Parse mount options and apply them to the supplied 94164934Ssam * nfs_diskless state. Used also by bootp/dhcp support. 95164934Ssam */ 96164934Ssamvoid 97164934Ssamnfs_parse_options(const char *envopts, struct nfs_args *nd) 98164934Ssam{ 99151024Spjd char *opts, *o, *otmp; 100164934Ssam unsigned long v; 101150995Spjd 102150995Spjd opts = strdup(envopts, M_TEMP); 103151024Spjd otmp = opts; 104151024Spjd while ((o = strsep(&otmp, ":;, ")) != NULL) { 105151024Spjd if (*o == '\0') 106151024Spjd ; /* Skip empty options. */ 107151024Spjd else if (strcmp(o, "soft") == 0) 108164934Ssam nd->flags |= NFSMNT_SOFT; 109150995Spjd else if (strcmp(o, "intr") == 0) 110164934Ssam nd->flags |= NFSMNT_INT; 111150995Spjd else if (strcmp(o, "conn") == 0) 112164934Ssam nd->flags |= NFSMNT_NOCONN; 113156879Spjd else if (strcmp(o, "nolockd") == 0) 114164934Ssam nd->flags |= NFSMNT_NOLOCKD; 115221436Sru else if (strcmp(o, "nocto") == 0) 116221436Sru nd->flags |= NFSMNT_NOCTO; 117164934Ssam else if (strcmp(o, "nfsv2") == 0) 118164934Ssam nd->flags &= ~(NFSMNT_NFSV3 | NFSMNT_NFSV4); 119164934Ssam else if (strcmp(o, "nfsv3") == 0) { 120164934Ssam nd->flags &= ~NFSMNT_NFSV4; 121164934Ssam nd->flags |= NFSMNT_NFSV3; 122164934Ssam } else if (strcmp(o, "tcp") == 0) 123164934Ssam nd->sotype = SOCK_STREAM; 124164934Ssam else if (strcmp(o, "udp") == 0) 125164934Ssam nd->sotype = SOCK_DGRAM; 126164934Ssam else if (strncmp(o, "rsize=", 6) == 0) { 127164934Ssam v = strtoul(o+6, NULL, 10); 128164934Ssam if (checkrwsize(v, "rsize")) { 129164934Ssam nd->rsize = (int) v; 130164934Ssam nd->flags |= NFSMNT_RSIZE; 131164934Ssam } 132164934Ssam } else if (strncmp(o, "wsize=", 6) == 0) { 133164934Ssam v = strtoul(o+6, NULL, 10); 134164934Ssam if (checkrwsize(v, "wsize")) { 135164934Ssam nd->wsize = (int) v; 136164934Ssam nd->flags |= NFSMNT_WSIZE; 137164934Ssam } 138164934Ssam } else 139164934Ssam printf("%s: skipping unknown option \"%s\"\n", 140164934Ssam __func__, o); 141150995Spjd } 142150995Spjd free(opts, M_TEMP); 143150995Spjd} 144150995Spjd 145103770Sjake/* 146103770Sjake * Populate the essential fields in the nfsv3_diskless structure. 147103770Sjake * 148103770Sjake * The loader is expected to export the following environment variables: 149103770Sjake * 150145572Sdes * boot.netif.name name of boot interface 151103770Sjake * boot.netif.ip IP address on boot interface 152103770Sjake * boot.netif.netmask netmask on boot interface 153103770Sjake * boot.netif.gateway default gateway (optional) 154103770Sjake * boot.netif.hwaddr hardware address of boot interface 155103770Sjake * boot.nfsroot.server IP address of root filesystem server 156103770Sjake * boot.nfsroot.path path of the root filesystem on server 157103770Sjake * boot.nfsroot.nfshandle NFS handle for root filesystem on server 158212123Srmacklem * boot.nfsroot.nfshandlelen and length of this handle (for NFSv3 only) 159150995Spjd * boot.nfsroot.options NFS options for the root filesystem 160103770Sjake */ 161103770Sjakevoid 162103770Sjakenfs_setup_diskless(void) 163103770Sjake{ 164103770Sjake struct nfs_diskless *nd = &nfs_diskless; 165212123Srmacklem struct nfsv3_diskless *nd3 = &nfsv3_diskless; 166103770Sjake struct ifnet *ifp; 167103770Sjake struct ifaddr *ifa; 168103770Sjake struct sockaddr_dl *sdl, ourdl; 169103770Sjake struct sockaddr_in myaddr, netmask; 170103770Sjake char *cp; 171212123Srmacklem int cnt, fhlen, is_nfsv3; 172212123Srmacklem uint32_t len; 173103770Sjake 174212123Srmacklem if (nfs_diskless_valid != 0) 175103770Sjake return; 176212123Srmacklem 177212123Srmacklem /* get handle size. If this succeeds, it's an NFSv3 setup. */ 178212123Srmacklem if ((cp = getenv("boot.nfsroot.nfshandlelen")) != NULL) { 179212123Srmacklem cnt = sscanf(cp, "%d", &len); 180212123Srmacklem freeenv(cp); 181212123Srmacklem if (cnt != 1 || len == 0 || len > NFSX_V3FHMAX) { 182212123Srmacklem printf("nfs_diskless: bad NFS handle len\n"); 183212123Srmacklem return; 184212123Srmacklem } 185212123Srmacklem nd3->root_fhsize = len; 186212123Srmacklem is_nfsv3 = 1; 187212123Srmacklem } else 188212123Srmacklem is_nfsv3 = 0; 189103770Sjake /* set up interface */ 190103770Sjake if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 191103770Sjake return; 192103770Sjake if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 193103770Sjake printf("nfs_diskless: no netmask\n"); 194103770Sjake return; 195103770Sjake } 196212123Srmacklem if (is_nfsv3 != 0) { 197212123Srmacklem bcopy(&myaddr, &nd3->myif.ifra_addr, sizeof(myaddr)); 198212123Srmacklem bcopy(&myaddr, &nd3->myif.ifra_broadaddr, sizeof(myaddr)); 199212123Srmacklem ((struct sockaddr_in *) 200212123Srmacklem &nd3->myif.ifra_broadaddr)->sin_addr.s_addr = 201212123Srmacklem myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 202212123Srmacklem bcopy(&netmask, &nd3->myif.ifra_mask, sizeof(netmask)); 203212123Srmacklem } else { 204212123Srmacklem bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 205212123Srmacklem bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 206212123Srmacklem ((struct sockaddr_in *) 207212123Srmacklem &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 208212123Srmacklem myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 209212123Srmacklem bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 210212123Srmacklem } 211103770Sjake 212103770Sjake if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 213103770Sjake printf("nfs_diskless: no hardware address\n"); 214103770Sjake return; 215103770Sjake } 216103770Sjake ifa = NULL; 217218757Sbz CURVNET_SET(TD_TO_VNET(curthread)); 218108172Shsu IFNET_RLOCK(); 219181803Sbz TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 220103770Sjake TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 221160038Syar if (ifa->ifa_addr->sa_family == AF_LINK) { 222160038Syar sdl = (struct sockaddr_dl *)ifa->ifa_addr; 223103770Sjake if ((sdl->sdl_type == ourdl.sdl_type) && 224103770Sjake (sdl->sdl_alen == ourdl.sdl_alen) && 225152920Sru !bcmp(LLADDR(sdl), 226152920Sru LLADDR(&ourdl), 227108172Shsu sdl->sdl_alen)) { 228108172Shsu IFNET_RUNLOCK(); 229218757Sbz CURVNET_RESTORE(); 230103770Sjake goto match_done; 231108172Shsu } 232103770Sjake } 233103770Sjake } 234103770Sjake } 235108172Shsu IFNET_RUNLOCK(); 236218757Sbz CURVNET_RESTORE(); 237103770Sjake printf("nfs_diskless: no interface\n"); 238103770Sjake return; /* no matching interface */ 239103770Sjakematch_done: 240145570Sdes setenv("boot.netif.name", ifp->if_xname); 241212123Srmacklem if (is_nfsv3 != 0) { 242212123Srmacklem strlcpy(nd3->myif.ifra_name, ifp->if_xname, 243212123Srmacklem sizeof(nd3->myif.ifra_name)); 244103770Sjake 245212123Srmacklem /* set up gateway */ 246212123Srmacklem inaddr_to_sockaddr("boot.netif.gateway", &nd3->mygateway); 247103770Sjake 248212123Srmacklem /* set up root mount */ 249212123Srmacklem nd3->root_args.rsize = 32768; /* XXX tunable? */ 250212123Srmacklem nd3->root_args.wsize = 32768; 251212123Srmacklem nd3->root_args.sotype = SOCK_STREAM; 252212123Srmacklem nd3->root_args.flags = (NFSMNT_NFSV3 | NFSMNT_WSIZE | 253212123Srmacklem NFSMNT_RSIZE | NFSMNT_RESVPORT); 254212123Srmacklem if (inaddr_to_sockaddr("boot.nfsroot.server", 255212123Srmacklem &nd3->root_saddr)) { 256212123Srmacklem printf("nfs_diskless: no server\n"); 257212123Srmacklem return; 258212123Srmacklem } 259212123Srmacklem nd3->root_saddr.sin_port = htons(NFS_PORT); 260212123Srmacklem fhlen = decode_nfshandle("boot.nfsroot.nfshandle", 261212123Srmacklem &nd3->root_fh[0], NFSX_V3FHMAX); 262212123Srmacklem if (fhlen == 0) { 263212123Srmacklem printf("nfs_diskless: no NFS handle\n"); 264212123Srmacklem return; 265212123Srmacklem } 266212123Srmacklem if (fhlen != nd3->root_fhsize) { 267212123Srmacklem printf("nfs_diskless: bad NFS handle len=%d\n", fhlen); 268212123Srmacklem return; 269212123Srmacklem } 270212123Srmacklem if ((cp = getenv("boot.nfsroot.path")) != NULL) { 271212123Srmacklem strncpy(nd3->root_hostnam, cp, MNAMELEN - 1); 272212123Srmacklem freeenv(cp); 273212123Srmacklem } 274212123Srmacklem if ((cp = getenv("boot.nfsroot.options")) != NULL) { 275212123Srmacklem nfs_parse_options(cp, &nd3->root_args); 276212123Srmacklem freeenv(cp); 277212123Srmacklem } 278212123Srmacklem 279212123Srmacklem nfs_diskless_valid = 3; 280212123Srmacklem } else { 281212123Srmacklem strlcpy(nd->myif.ifra_name, ifp->if_xname, 282212123Srmacklem sizeof(nd->myif.ifra_name)); 283212123Srmacklem 284212123Srmacklem /* set up gateway */ 285212123Srmacklem inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 286164934Ssam 287212123Srmacklem /* set up root mount */ 288212123Srmacklem nd->root_args.rsize = 8192; /* XXX tunable? */ 289212123Srmacklem nd->root_args.wsize = 8192; 290212123Srmacklem nd->root_args.sotype = SOCK_STREAM; 291212123Srmacklem nd->root_args.flags = (NFSMNT_WSIZE | 292212123Srmacklem NFSMNT_RSIZE | NFSMNT_RESVPORT); 293212123Srmacklem if (inaddr_to_sockaddr("boot.nfsroot.server", 294212123Srmacklem &nd->root_saddr)) { 295212123Srmacklem printf("nfs_diskless: no server\n"); 296212123Srmacklem return; 297212123Srmacklem } 298212123Srmacklem nd->root_saddr.sin_port = htons(NFS_PORT); 299212123Srmacklem if (decode_nfshandle("boot.nfsroot.nfshandle", 300212123Srmacklem &nd->root_fh[0], NFSX_V2FH) == 0) { 301212123Srmacklem printf("nfs_diskless: no NFS handle\n"); 302212123Srmacklem return; 303212123Srmacklem } 304212123Srmacklem if ((cp = getenv("boot.nfsroot.path")) != NULL) { 305212123Srmacklem strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 306212123Srmacklem freeenv(cp); 307212123Srmacklem } 308212123Srmacklem if ((cp = getenv("boot.nfsroot.options")) != NULL) { 309212123Srmacklem struct nfs_args args; 310212123Srmacklem 311212123Srmacklem /* 312212123Srmacklem * XXX yech, convert between old and current 313212123Srmacklem * arg format 314212123Srmacklem */ 315212123Srmacklem args.flags = nd->root_args.flags; 316212123Srmacklem args.sotype = nd->root_args.sotype; 317212123Srmacklem args.rsize = nd->root_args.rsize; 318212123Srmacklem args.wsize = nd->root_args.wsize; 319212123Srmacklem nfs_parse_options(cp, &args); 320212123Srmacklem nd->root_args.flags = args.flags; 321212123Srmacklem nd->root_args.sotype = args.sotype; 322212123Srmacklem nd->root_args.rsize = args.rsize; 323212123Srmacklem nd->root_args.wsize = args.wsize; 324212123Srmacklem freeenv(cp); 325212123Srmacklem } 326212123Srmacklem 327212123Srmacklem nfs_diskless_valid = 1; 328150995Spjd } 329103770Sjake} 330103770Sjake 331103770Sjakestatic int 332103770Sjakeinaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 333103770Sjake{ 334103770Sjake u_int32_t a[4]; 335103770Sjake char *cp; 336103770Sjake int count; 337103770Sjake 338103770Sjake bzero(sa, sizeof(*sa)); 339103770Sjake sa->sin_len = sizeof(*sa); 340103770Sjake sa->sin_family = AF_INET; 341103770Sjake 342103770Sjake if ((cp = getenv(ev)) == NULL) 343103770Sjake return (1); 344103770Sjake count = sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]); 345103770Sjake freeenv(cp); 346103770Sjake if (count != 4) 347103770Sjake return (1); 348103770Sjake sa->sin_addr.s_addr = 349103770Sjake htonl((a[0] << 24) | (a[1] << 16) | (a[2] << 8) | a[3]); 350103770Sjake return (0); 351103770Sjake} 352103770Sjake 353103770Sjakestatic int 354103770Sjakehwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 355103770Sjake{ 356103770Sjake char *cp; 357103770Sjake u_int32_t a[6]; 358103770Sjake int count; 359103770Sjake 360103770Sjake bzero(sa, sizeof(*sa)); 361103770Sjake sa->sdl_len = sizeof(*sa); 362103770Sjake sa->sdl_family = AF_LINK; 363103770Sjake sa->sdl_type = IFT_ETHER; 364103770Sjake sa->sdl_alen = ETHER_ADDR_LEN; 365103770Sjake if ((cp = getenv(ev)) == NULL) 366103770Sjake return (1); 367103770Sjake count = sscanf(cp, "%x:%x:%x:%x:%x:%x", 368103770Sjake &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]); 369103770Sjake freeenv(cp); 370103770Sjake if (count != 6) 371103770Sjake return (1); 372103770Sjake sa->sdl_data[0] = a[0]; 373103770Sjake sa->sdl_data[1] = a[1]; 374103770Sjake sa->sdl_data[2] = a[2]; 375103770Sjake sa->sdl_data[3] = a[3]; 376103770Sjake sa->sdl_data[4] = a[4]; 377103770Sjake sa->sdl_data[5] = a[5]; 378103770Sjake return (0); 379103770Sjake} 380103770Sjake 381103770Sjakestatic int 382212123Srmacklemdecode_nfshandle(char *ev, u_char *fh, int maxfh) 383103770Sjake{ 384103770Sjake u_char *cp, *ep; 385103770Sjake int len, val; 386103770Sjake 387103770Sjake ep = cp = getenv(ev); 388103770Sjake if (cp == NULL) 389103770Sjake return (0); 390103770Sjake if ((strlen(cp) < 2) || (*cp != 'X')) { 391103770Sjake freeenv(ep); 392103770Sjake return (0); 393103770Sjake } 394103770Sjake len = 0; 395103770Sjake cp++; 396103770Sjake for (;;) { 397103770Sjake if (*cp == 'X') { 398103770Sjake freeenv(ep); 399103770Sjake return (len); 400103770Sjake } 401103770Sjake if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff)) { 402103770Sjake freeenv(ep); 403103770Sjake return (0); 404103770Sjake } 405103770Sjake *(fh++) = val; 406103770Sjake len++; 407103770Sjake cp += 2; 408212123Srmacklem if (len > maxfh) { 409103770Sjake freeenv(ep); 410103770Sjake return (0); 411103770Sjake } 412103770Sjake } 413103770Sjake} 414132808Sphk 415132808Sphk#if !defined(BOOTP_NFSROOT) 416132808Sphkstatic void 417132808Sphknfs_rootconf(void) 418132808Sphk{ 419132808Sphk 420132808Sphk nfs_setup_diskless(); 421132808Sphk if (nfs_diskless_valid) 422132808Sphk rootdevnames[0] = "nfs:"; 423132808Sphk} 424132808Sphk 425177253SrwatsonSYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, nfs_rootconf, NULL); 426132808Sphk#endif 427132808Sphk 428