1*a0bbd24dSbriggs /* $OpenBSD: nfs_boot.c,v 1.7 1996/10/20 17:07:27 briggs Exp $ */ 209d901c0Sderaadt /* $NetBSD: nfs_boot.c,v 1.26 1996/05/07 02:51:25 thorpej Exp $ */ 3df930be7Sderaadt 4df930be7Sderaadt /* 5df930be7Sderaadt * Copyright (c) 1995 Adam Glass, Gordon Ross 6df930be7Sderaadt * All rights reserved. 7df930be7Sderaadt * 8df930be7Sderaadt * Redistribution and use in source and binary forms, with or without 9df930be7Sderaadt * modification, are permitted provided that the following conditions 10df930be7Sderaadt * are met: 11df930be7Sderaadt * 1. Redistributions of source code must retain the above copyright 12df930be7Sderaadt * notice, this list of conditions and the following disclaimer. 13df930be7Sderaadt * 2. Redistributions in binary form must reproduce the above copyright 14df930be7Sderaadt * notice, this list of conditions and the following disclaimer in the 15df930be7Sderaadt * documentation and/or other materials provided with the distribution. 16df930be7Sderaadt * 3. The name of the authors may not be used to endorse or promote products 17df930be7Sderaadt * derived from this software without specific prior written permission. 18df930be7Sderaadt * 19df930be7Sderaadt * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 20df930be7Sderaadt * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21df930be7Sderaadt * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22df930be7Sderaadt * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 23df930be7Sderaadt * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24df930be7Sderaadt * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25df930be7Sderaadt * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26df930be7Sderaadt * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27df930be7Sderaadt * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28df930be7Sderaadt * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29df930be7Sderaadt */ 30df930be7Sderaadt 31df930be7Sderaadt #include <sys/param.h> 32df930be7Sderaadt #include <sys/systm.h> 33df930be7Sderaadt #include <sys/kernel.h> 34df930be7Sderaadt #include <sys/conf.h> 35df930be7Sderaadt #include <sys/ioctl.h> 36df930be7Sderaadt #include <sys/proc.h> 37df930be7Sderaadt #include <sys/mount.h> 38df930be7Sderaadt #include <sys/mbuf.h> 39df930be7Sderaadt #include <sys/reboot.h> 40df930be7Sderaadt #include <sys/socket.h> 41df930be7Sderaadt #include <sys/socketvar.h> 42df930be7Sderaadt 43df930be7Sderaadt #include <net/if.h> 44df930be7Sderaadt #include <net/route.h> 45df930be7Sderaadt 46df930be7Sderaadt #include <netinet/in.h> 47df930be7Sderaadt #include <netinet/if_ether.h> 48df930be7Sderaadt 49df930be7Sderaadt #include <nfs/rpcv2.h> 5078530d46Smickey #include <nfs/nfsproto.h> 51df930be7Sderaadt #include <nfs/nfs.h> 52df930be7Sderaadt #include <nfs/nfsdiskless.h> 53df930be7Sderaadt #include <nfs/krpc.h> 54df930be7Sderaadt #include <nfs/xdr_subs.h> 55370decb4Sniklas #include <nfs/nfs_var.h> 56df930be7Sderaadt 57f3f6cb75Sbriggs #ifndef NFSCLIENT 58df930be7Sderaadt 59df930be7Sderaadt int nfs_boot_init(nd, procp) 60df930be7Sderaadt struct nfs_diskless *nd; 61df930be7Sderaadt struct proc *procp; 62df930be7Sderaadt { 63*a0bbd24dSbriggs panic("nfs_boot_init: NFSCLIENT not enabled in kernel"); 64df930be7Sderaadt } 65df930be7Sderaadt 6678530d46Smickey void 6778530d46Smickey nfs_boot_getfh(bpsin, key, ndmntp) 6878530d46Smickey struct sockaddr_in *bpsin; 6978530d46Smickey char *key; 7078530d46Smickey struct nfs_dlmount *ndmntp; 7178530d46Smickey { 7278530d46Smickey /* can not get here */ 7378530d46Smickey } 7478530d46Smickey 75f3f6cb75Sbriggs #else /* (ifdef NFSCLIENT) */ 76df930be7Sderaadt 77df930be7Sderaadt /* 78df930be7Sderaadt * Support for NFS diskless booting, specifically getting information 79df930be7Sderaadt * about where to boot from, what pathnames, etc. 80df930be7Sderaadt * 81df930be7Sderaadt * This implememtation uses RARP and the bootparam RPC. 82df930be7Sderaadt * We are forced to implement RPC anyway (to get file handles) 83df930be7Sderaadt * so we might as well take advantage of it for bootparam too. 84df930be7Sderaadt * 85df930be7Sderaadt * The diskless boot sequence goes as follows: 86df930be7Sderaadt * (1) Use RARP to get our interface address 87df930be7Sderaadt * (2) Use RPC/bootparam/whoami to get our hostname, 88df930be7Sderaadt * our IP address, and the server's IP address. 89df930be7Sderaadt * (3) Use RPC/bootparam/getfile to get the root path 90df930be7Sderaadt * (4) Use RPC/mountd to get the root file handle 91df930be7Sderaadt * (5) Use RPC/bootparam/getfile to get the swap path 92df930be7Sderaadt * (6) Use RPC/mountd to get the swap file handle 93df930be7Sderaadt * 94df930be7Sderaadt * (This happens to be the way Sun does it too.) 95df930be7Sderaadt */ 96df930be7Sderaadt 97df930be7Sderaadt /* bootparam RPC */ 98df930be7Sderaadt static int bp_whoami __P((struct sockaddr_in *bpsin, 99df930be7Sderaadt struct in_addr *my_ip, struct in_addr *gw_ip)); 100df930be7Sderaadt static int bp_getfile __P((struct sockaddr_in *bpsin, char *key, 101df930be7Sderaadt struct sockaddr_in *mdsin, char *servname, char *path)); 102df930be7Sderaadt 103df930be7Sderaadt /* mountd RPC */ 104df930be7Sderaadt static int md_mount __P((struct sockaddr_in *mdsin, char *path, 105df930be7Sderaadt u_char *fh)); 106df930be7Sderaadt 107df930be7Sderaadt char *nfsbootdevname; 108df930be7Sderaadt 109df930be7Sderaadt /* 110df930be7Sderaadt * Called with an empty nfs_diskless struct to be filled in. 111df930be7Sderaadt */ 112df930be7Sderaadt int 113df930be7Sderaadt nfs_boot_init(nd, procp) 114df930be7Sderaadt struct nfs_diskless *nd; 115df930be7Sderaadt struct proc *procp; 116df930be7Sderaadt { 117df930be7Sderaadt struct ifreq ireq; 118df930be7Sderaadt struct in_addr my_ip, gw_ip; 119df930be7Sderaadt struct sockaddr_in bp_sin; 120df930be7Sderaadt struct sockaddr_in *sin; 121df930be7Sderaadt struct ifnet *ifp; 122df930be7Sderaadt struct socket *so; 123df930be7Sderaadt int error; 124df930be7Sderaadt 125df930be7Sderaadt /* 126df930be7Sderaadt * Find an interface, rarp for its ip address, stuff it, the 127df930be7Sderaadt * implied broadcast addr, and netmask into a nfs_diskless struct. 128df930be7Sderaadt * 129df930be7Sderaadt * This was moved here from nfs_vfsops.c because this procedure 130df930be7Sderaadt * would be quite different if someone decides to write (i.e.) a 131df930be7Sderaadt * BOOTP version of this file (might not use RARP, etc.) 132df930be7Sderaadt */ 133df930be7Sderaadt 134df930be7Sderaadt /* 135df930be7Sderaadt * Find a network interface. 136df930be7Sderaadt */ 137df930be7Sderaadt if (nfsbootdevname) 138df930be7Sderaadt ifp = ifunit(nfsbootdevname); 139df930be7Sderaadt else 140df930be7Sderaadt for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) 141df930be7Sderaadt if ((ifp->if_flags & 142df930be7Sderaadt (IFF_LOOPBACK|IFF_POINTOPOINT)) == 0) 143df930be7Sderaadt break; 144df930be7Sderaadt if (ifp == NULL) 145df930be7Sderaadt panic("nfs_boot: no suitable interface"); 14609d901c0Sderaadt bcopy(ifp->if_xname, ireq.ifr_name, IFNAMSIZ); 147df930be7Sderaadt printf("nfs_boot: using network interface '%s'\n", 148df930be7Sderaadt ireq.ifr_name); 149df930be7Sderaadt 150df930be7Sderaadt /* 151df930be7Sderaadt * Bring up the interface. 152df930be7Sderaadt * 153df930be7Sderaadt * Get the old interface flags and or IFF_UP into them; if 154df930be7Sderaadt * IFF_UP set blindly, interface selection can be clobbered. 155df930be7Sderaadt */ 156df930be7Sderaadt if ((error = socreate(AF_INET, &so, SOCK_DGRAM, 0)) != 0) 157df930be7Sderaadt panic("nfs_boot: socreate, error=%d", error); 158df930be7Sderaadt error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)&ireq, procp); 159df930be7Sderaadt if (error) 160df930be7Sderaadt panic("nfs_boot: GIFFLAGS, error=%d", error); 161df930be7Sderaadt ireq.ifr_flags |= IFF_UP; 162df930be7Sderaadt error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)&ireq, procp); 163df930be7Sderaadt if (error) 164df930be7Sderaadt panic("nfs_boot: SIFFLAGS, error=%d", error); 165df930be7Sderaadt 166df930be7Sderaadt /* 167df930be7Sderaadt * Do RARP for the interface address. 168df930be7Sderaadt */ 169df930be7Sderaadt if ((error = revarpwhoami(&my_ip, ifp)) != 0) 170df930be7Sderaadt panic("revarp failed, error=%d", error); 17178530d46Smickey printf("nfs_boot: client_addr=0x%x\n", (u_int32_t)ntohl(my_ip.s_addr)); 172df930be7Sderaadt 173df930be7Sderaadt /* 174df930be7Sderaadt * Do enough of ifconfig(8) so that the chosen interface 175df930be7Sderaadt * can talk to the servers. (just set the address) 176df930be7Sderaadt */ 177df930be7Sderaadt sin = (struct sockaddr_in *)&ireq.ifr_addr; 178df930be7Sderaadt bzero((caddr_t)sin, sizeof(*sin)); 179df930be7Sderaadt sin->sin_len = sizeof(*sin); 180df930be7Sderaadt sin->sin_family = AF_INET; 181df930be7Sderaadt sin->sin_addr.s_addr = my_ip.s_addr; 182df930be7Sderaadt error = ifioctl(so, SIOCSIFADDR, (caddr_t)&ireq, procp); 183df930be7Sderaadt if (error) 184df930be7Sderaadt panic("nfs_boot: set if addr, error=%d", error); 185df930be7Sderaadt 186df930be7Sderaadt soclose(so); 187df930be7Sderaadt 188df930be7Sderaadt /* 189df930be7Sderaadt * Get client name and gateway address. 190df930be7Sderaadt * RPC: bootparam/whoami 191df930be7Sderaadt * Use the old broadcast address for the WHOAMI 192df930be7Sderaadt * call because we do not yet know our netmask. 193df930be7Sderaadt * The server address returned by the WHOAMI call 194df930be7Sderaadt * is used for all subsequent booptaram RPCs. 195df930be7Sderaadt */ 196df930be7Sderaadt bzero((caddr_t)&bp_sin, sizeof(bp_sin)); 197df930be7Sderaadt bp_sin.sin_len = sizeof(bp_sin); 198df930be7Sderaadt bp_sin.sin_family = AF_INET; 199df930be7Sderaadt bp_sin.sin_addr.s_addr = INADDR_BROADCAST; 200df930be7Sderaadt hostnamelen = MAXHOSTNAMELEN; 201df930be7Sderaadt 202df930be7Sderaadt /* this returns gateway IP address */ 203df930be7Sderaadt error = bp_whoami(&bp_sin, &my_ip, &gw_ip); 204df930be7Sderaadt if (error) 205df930be7Sderaadt panic("nfs_boot: bootparam whoami, error=%d", error); 206df930be7Sderaadt printf("nfs_boot: server_addr=0x%x\n", 20778530d46Smickey (u_int32_t)ntohl(bp_sin.sin_addr.s_addr)); 208df930be7Sderaadt printf("nfs_boot: hostname=%s\n", hostname); 209df930be7Sderaadt 210df930be7Sderaadt #ifdef NFS_BOOT_GATEWAY 211df930be7Sderaadt /* 212df930be7Sderaadt * XXX - This code is conditionally compiled only because 213df930be7Sderaadt * many bootparam servers (in particular, SunOS 4.1.3) 214df930be7Sderaadt * always set the gateway address to their own address. 215df930be7Sderaadt * The bootparam server is not necessarily the gateway. 216df930be7Sderaadt * We could just believe the server, and at worst you would 217df930be7Sderaadt * need to delete the incorrect default route before adding 218df930be7Sderaadt * the correct one, but for simplicity, ignore the gateway. 219df930be7Sderaadt * If your server is OK, you can turn on this option. 220df930be7Sderaadt * 221df930be7Sderaadt * If the gateway address is set, add a default route. 222df930be7Sderaadt * (The mountd RPCs may go across a gateway.) 223df930be7Sderaadt */ 224df930be7Sderaadt if (gw_ip.s_addr) { 225df930be7Sderaadt struct sockaddr dst, gw, mask; 226df930be7Sderaadt /* Destination: (default) */ 227df930be7Sderaadt bzero((caddr_t)&dst, sizeof(dst)); 228df930be7Sderaadt dst.sa_len = sizeof(dst); 229df930be7Sderaadt dst.sa_family = AF_INET; 230df930be7Sderaadt /* Gateway: */ 231df930be7Sderaadt bzero((caddr_t)&gw, sizeof(gw)); 232df930be7Sderaadt sin = (struct sockaddr_in *)&gw; 233df930be7Sderaadt sin->sin_len = sizeof(gw); 234df930be7Sderaadt sin->sin_family = AF_INET; 235df930be7Sderaadt sin->sin_addr.s_addr = gw_ip.s_addr; 236df930be7Sderaadt /* Mask: (zero length) */ 237df930be7Sderaadt bzero(&mask, sizeof(mask)); 238df930be7Sderaadt 239df930be7Sderaadt printf("nfs_boot: gateway=0x%x\n", ntohl(gw_ip.s_addr)); 240df930be7Sderaadt /* add, dest, gw, mask, flags, 0 */ 241df930be7Sderaadt error = rtrequest(RTM_ADD, &dst, (struct sockaddr *)&gw, 242df930be7Sderaadt &mask, (RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL); 243df930be7Sderaadt if (error) 244df930be7Sderaadt printf("nfs_boot: add route, error=%d\n", error); 245df930be7Sderaadt } 246df930be7Sderaadt #endif 247df930be7Sderaadt 248370decb4Sniklas bcopy(&bp_sin, &nd->nd_boot, sizeof(bp_sin)); 249df930be7Sderaadt 250df930be7Sderaadt return (0); 251df930be7Sderaadt } 252df930be7Sderaadt 253370decb4Sniklas void 254370decb4Sniklas nfs_boot_getfh(bpsin, key, ndmntp) 255df930be7Sderaadt struct sockaddr_in *bpsin; /* bootparam server */ 256df930be7Sderaadt char *key; /* root or swap */ 257df930be7Sderaadt struct nfs_dlmount *ndmntp; /* output */ 258df930be7Sderaadt { 259df930be7Sderaadt char pathname[MAXPATHLEN]; 260df930be7Sderaadt char *sp, *dp, *endp; 261370decb4Sniklas struct sockaddr_in *sin; 262df930be7Sderaadt int error; 263df930be7Sderaadt 264370decb4Sniklas sin = &ndmntp->ndm_saddr; 265370decb4Sniklas 266df930be7Sderaadt /* 267df930be7Sderaadt * Get server:pathname for "key" (root or swap) 268df930be7Sderaadt * using RPC to bootparam/getfile 269df930be7Sderaadt */ 27078530d46Smickey error = bp_getfile(bpsin, key, sin, ndmntp->ndm_host, pathname); 271df930be7Sderaadt if (error) 272df930be7Sderaadt panic("nfs_boot: bootparam get %s: %d", key, error); 273df930be7Sderaadt 274df930be7Sderaadt /* 275df930be7Sderaadt * Get file handle for "key" (root or swap) 276df930be7Sderaadt * using RPC to mountd/mount 277df930be7Sderaadt */ 278370decb4Sniklas error = md_mount(sin, pathname, ndmntp->ndm_fh); 279df930be7Sderaadt if (error) 280df930be7Sderaadt panic("nfs_boot: mountd %s, error=%d", key, error); 281df930be7Sderaadt 282370decb4Sniklas /* Set port number for NFS use. */ 283370decb4Sniklas /* XXX: NFS port is always 2049, right? */ 284370decb4Sniklas error = krpc_portmap(sin, NFS_PROG, NFS_VER2, &sin->sin_port); 285370decb4Sniklas if (error) 286370decb4Sniklas panic("nfs_boot: portmap NFS/v2, error=%d", error); 287370decb4Sniklas 288df930be7Sderaadt /* Construct remote path (for getmntinfo(3)) */ 289df930be7Sderaadt dp = ndmntp->ndm_host; 290df930be7Sderaadt endp = dp + MNAMELEN - 1; 291df930be7Sderaadt dp += strlen(dp); 292df930be7Sderaadt *dp++ = ':'; 293df930be7Sderaadt for (sp = pathname; *sp && dp < endp;) 294df930be7Sderaadt *dp++ = *sp++; 295df930be7Sderaadt *dp = '\0'; 296df930be7Sderaadt 297df930be7Sderaadt } 298df930be7Sderaadt 299df930be7Sderaadt 300df930be7Sderaadt /* 301df930be7Sderaadt * RPC: bootparam/whoami 302df930be7Sderaadt * Given client IP address, get: 303df930be7Sderaadt * client name (hostname) 304df930be7Sderaadt * domain name (domainname) 305df930be7Sderaadt * gateway address 306df930be7Sderaadt * 307df930be7Sderaadt * The hostname and domainname are set here for convenience. 308df930be7Sderaadt * 309df930be7Sderaadt * Note - bpsin is initialized to the broadcast address, 310df930be7Sderaadt * and will be replaced with the bootparam server address 311df930be7Sderaadt * after this call is complete. Have to use PMAP_PROC_CALL 312df930be7Sderaadt * to make sure we get responses only from a servers that 313df930be7Sderaadt * know about us (don't want to broadcast a getport call). 314df930be7Sderaadt */ 315df930be7Sderaadt static int 316df930be7Sderaadt bp_whoami(bpsin, my_ip, gw_ip) 317df930be7Sderaadt struct sockaddr_in *bpsin; 318df930be7Sderaadt struct in_addr *my_ip; 319df930be7Sderaadt struct in_addr *gw_ip; 320df930be7Sderaadt { 321df930be7Sderaadt /* RPC structures for PMAPPROC_CALLIT */ 322df930be7Sderaadt struct whoami_call { 323df930be7Sderaadt u_int32_t call_prog; 324df930be7Sderaadt u_int32_t call_vers; 325df930be7Sderaadt u_int32_t call_proc; 326df930be7Sderaadt u_int32_t call_arglen; 327df930be7Sderaadt } *call; 328df930be7Sderaadt struct callit_reply { 329df930be7Sderaadt u_int32_t port; 330df930be7Sderaadt u_int32_t encap_len; 331df930be7Sderaadt /* encapsulated data here */ 332df930be7Sderaadt } *reply; 333df930be7Sderaadt 334df930be7Sderaadt struct mbuf *m, *from; 335df930be7Sderaadt struct sockaddr_in *sin; 336df930be7Sderaadt int error, msg_len; 337df930be7Sderaadt int16_t port; 338df930be7Sderaadt 339df930be7Sderaadt /* 340df930be7Sderaadt * Build request message for PMAPPROC_CALLIT. 341df930be7Sderaadt */ 342df930be7Sderaadt m = m_get(M_WAIT, MT_DATA); 343df930be7Sderaadt call = mtod(m, struct whoami_call *); 344df930be7Sderaadt m->m_len = sizeof(*call); 345df930be7Sderaadt call->call_prog = txdr_unsigned(BOOTPARAM_PROG); 346df930be7Sderaadt call->call_vers = txdr_unsigned(BOOTPARAM_VERS); 347df930be7Sderaadt call->call_proc = txdr_unsigned(BOOTPARAM_WHOAMI); 348df930be7Sderaadt 349df930be7Sderaadt /* 350df930be7Sderaadt * append encapsulated data (client IP address) 351df930be7Sderaadt */ 352df930be7Sderaadt m->m_next = xdr_inaddr_encode(my_ip); 353df930be7Sderaadt call->call_arglen = txdr_unsigned(m->m_next->m_len); 354df930be7Sderaadt 355df930be7Sderaadt /* RPC: portmap/callit */ 356df930be7Sderaadt bpsin->sin_port = htons(PMAPPORT); 357df930be7Sderaadt from = NULL; 358df930be7Sderaadt error = krpc_call(bpsin, PMAPPROG, PMAPVERS, 359df930be7Sderaadt PMAPPROC_CALLIT, &m, &from); 360df930be7Sderaadt if (error) 361df930be7Sderaadt return error; 362df930be7Sderaadt 363df930be7Sderaadt /* 364df930be7Sderaadt * Parse result message. 365df930be7Sderaadt */ 366df930be7Sderaadt if (m->m_len < sizeof(*reply)) { 367df930be7Sderaadt m = m_pullup(m, sizeof(*reply)); 368df930be7Sderaadt if (m == NULL) 369df930be7Sderaadt goto bad; 370df930be7Sderaadt } 371df930be7Sderaadt reply = mtod(m, struct callit_reply *); 372df930be7Sderaadt port = fxdr_unsigned(u_int32_t, reply->port); 373df930be7Sderaadt msg_len = fxdr_unsigned(u_int32_t, reply->encap_len); 374df930be7Sderaadt m_adj(m, sizeof(*reply)); 375df930be7Sderaadt 376df930be7Sderaadt /* 377df930be7Sderaadt * Save bootparam server address 378df930be7Sderaadt */ 379df930be7Sderaadt sin = mtod(from, struct sockaddr_in *); 380df930be7Sderaadt bpsin->sin_port = htons(port); 381df930be7Sderaadt bpsin->sin_addr.s_addr = sin->sin_addr.s_addr; 382df930be7Sderaadt 383df930be7Sderaadt /* client name */ 384df930be7Sderaadt hostnamelen = MAXHOSTNAMELEN-1; 385df930be7Sderaadt m = xdr_string_decode(m, hostname, &hostnamelen); 386df930be7Sderaadt if (m == NULL) 387df930be7Sderaadt goto bad; 388df930be7Sderaadt 389df930be7Sderaadt /* domain name */ 390df930be7Sderaadt domainnamelen = MAXHOSTNAMELEN-1; 391df930be7Sderaadt m = xdr_string_decode(m, domainname, &domainnamelen); 392df930be7Sderaadt if (m == NULL) 393df930be7Sderaadt goto bad; 394df930be7Sderaadt 395df930be7Sderaadt /* gateway address */ 396df930be7Sderaadt m = xdr_inaddr_decode(m, gw_ip); 397df930be7Sderaadt if (m == NULL) 398df930be7Sderaadt goto bad; 399df930be7Sderaadt 400df930be7Sderaadt /* success */ 401df930be7Sderaadt goto out; 402df930be7Sderaadt 403df930be7Sderaadt bad: 404df930be7Sderaadt printf("nfs_boot: bootparam_whoami: bad reply\n"); 405df930be7Sderaadt error = EBADRPC; 406df930be7Sderaadt 407df930be7Sderaadt out: 408df930be7Sderaadt if (from) 409df930be7Sderaadt m_freem(from); 410df930be7Sderaadt if (m) 411df930be7Sderaadt m_freem(m); 412df930be7Sderaadt return(error); 413df930be7Sderaadt } 414df930be7Sderaadt 415df930be7Sderaadt 416df930be7Sderaadt /* 417df930be7Sderaadt * RPC: bootparam/getfile 418df930be7Sderaadt * Given client name and file "key", get: 419df930be7Sderaadt * server name 420df930be7Sderaadt * server IP address 421df930be7Sderaadt * server pathname 422df930be7Sderaadt */ 423df930be7Sderaadt static int 424df930be7Sderaadt bp_getfile(bpsin, key, md_sin, serv_name, pathname) 425df930be7Sderaadt struct sockaddr_in *bpsin; 426df930be7Sderaadt char *key; 427df930be7Sderaadt struct sockaddr_in *md_sin; 428df930be7Sderaadt char *serv_name; 429df930be7Sderaadt char *pathname; 430df930be7Sderaadt { 431df930be7Sderaadt struct mbuf *m; 432df930be7Sderaadt struct sockaddr_in *sin; 433df930be7Sderaadt struct in_addr inaddr; 434df930be7Sderaadt int error, sn_len, path_len; 435df930be7Sderaadt 436df930be7Sderaadt /* 437df930be7Sderaadt * Build request message. 438df930be7Sderaadt */ 439df930be7Sderaadt 440df930be7Sderaadt /* client name (hostname) */ 441df930be7Sderaadt m = xdr_string_encode(hostname, hostnamelen); 442370decb4Sniklas if (m == NULL) 443370decb4Sniklas return (ENOMEM); 444df930be7Sderaadt 445df930be7Sderaadt /* key name (root or swap) */ 446df930be7Sderaadt m->m_next = xdr_string_encode(key, strlen(key)); 447370decb4Sniklas if (m->m_next == NULL) 448370decb4Sniklas return (ENOMEM); 449df930be7Sderaadt 450df930be7Sderaadt /* RPC: bootparam/getfile */ 451df930be7Sderaadt error = krpc_call(bpsin, BOOTPARAM_PROG, BOOTPARAM_VERS, 452df930be7Sderaadt BOOTPARAM_GETFILE, &m, NULL); 453df930be7Sderaadt if (error) 454df930be7Sderaadt return error; 455df930be7Sderaadt 456df930be7Sderaadt /* 457df930be7Sderaadt * Parse result message. 458df930be7Sderaadt */ 459df930be7Sderaadt 460df930be7Sderaadt /* server name */ 461df930be7Sderaadt sn_len = MNAMELEN-1; 462df930be7Sderaadt m = xdr_string_decode(m, serv_name, &sn_len); 463df930be7Sderaadt if (m == NULL) 464df930be7Sderaadt goto bad; 465df930be7Sderaadt 466df930be7Sderaadt /* server IP address (mountd/NFS) */ 467df930be7Sderaadt m = xdr_inaddr_decode(m, &inaddr); 468df930be7Sderaadt if (m == NULL) 469df930be7Sderaadt goto bad; 470df930be7Sderaadt 471df930be7Sderaadt /* server pathname */ 472df930be7Sderaadt path_len = MAXPATHLEN-1; 473df930be7Sderaadt m = xdr_string_decode(m, pathname, &path_len); 474df930be7Sderaadt if (m == NULL) 475df930be7Sderaadt goto bad; 476df930be7Sderaadt 477df930be7Sderaadt /* setup server socket address */ 478df930be7Sderaadt sin = md_sin; 479df930be7Sderaadt bzero((caddr_t)sin, sizeof(*sin)); 480df930be7Sderaadt sin->sin_len = sizeof(*sin); 481df930be7Sderaadt sin->sin_family = AF_INET; 482df930be7Sderaadt sin->sin_addr = inaddr; 483df930be7Sderaadt 484df930be7Sderaadt /* success */ 485df930be7Sderaadt goto out; 486df930be7Sderaadt 487df930be7Sderaadt bad: 488df930be7Sderaadt printf("nfs_boot: bootparam_getfile: bad reply\n"); 489df930be7Sderaadt error = EBADRPC; 490df930be7Sderaadt 491df930be7Sderaadt out: 492df930be7Sderaadt m_freem(m); 493df930be7Sderaadt return(0); 494df930be7Sderaadt } 495df930be7Sderaadt 496df930be7Sderaadt 497df930be7Sderaadt /* 498df930be7Sderaadt * RPC: mountd/mount 499df930be7Sderaadt * Given a server pathname, get an NFS file handle. 500df930be7Sderaadt * Also, sets sin->sin_port to the NFS service port. 501df930be7Sderaadt */ 502df930be7Sderaadt static int 503df930be7Sderaadt md_mount(mdsin, path, fhp) 504df930be7Sderaadt struct sockaddr_in *mdsin; /* mountd server address */ 505df930be7Sderaadt char *path; 506df930be7Sderaadt u_char *fhp; 507df930be7Sderaadt { 508df930be7Sderaadt /* The RPC structures */ 509df930be7Sderaadt struct rdata { 510df930be7Sderaadt u_int32_t errno; 51178530d46Smickey u_int8_t fh[NFSX_V2FH]; 512df930be7Sderaadt } *rdata; 513df930be7Sderaadt struct mbuf *m; 514df930be7Sderaadt int error; 515df930be7Sderaadt 516df930be7Sderaadt /* Get port number for MOUNTD. */ 517df930be7Sderaadt error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER1, 518df930be7Sderaadt &mdsin->sin_port); 519df930be7Sderaadt if (error) return error; 520df930be7Sderaadt 521df930be7Sderaadt m = xdr_string_encode(path, strlen(path)); 522370decb4Sniklas if (m == NULL) 52378530d46Smickey return ENOMEM; 524df930be7Sderaadt 525df930be7Sderaadt /* Do RPC to mountd. */ 526df930be7Sderaadt error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER1, 527df930be7Sderaadt RPCMNT_MOUNT, &m, NULL); 528df930be7Sderaadt if (error) 529df930be7Sderaadt return error; /* message already freed */ 530df930be7Sderaadt 531370decb4Sniklas /* The reply might have only the errno. */ 532370decb4Sniklas if (m->m_len < 4) 533370decb4Sniklas goto bad; 534370decb4Sniklas /* Have at least errno, so check that. */ 535370decb4Sniklas rdata = mtod(m, struct rdata *); 536370decb4Sniklas error = fxdr_unsigned(u_int32_t, rdata->errno); 537370decb4Sniklas if (error) 538370decb4Sniklas goto out; 539370decb4Sniklas 540370decb4Sniklas /* Have errno==0, so the fh must be there. */ 541df930be7Sderaadt if (m->m_len < sizeof(*rdata)) { 542df930be7Sderaadt m = m_pullup(m, sizeof(*rdata)); 543df930be7Sderaadt if (m == NULL) 544df930be7Sderaadt goto bad; 545df930be7Sderaadt rdata = mtod(m, struct rdata *); 546370decb4Sniklas } 54778530d46Smickey bcopy(rdata->fh, fhp, NFSX_V2FH); 548df930be7Sderaadt goto out; 549df930be7Sderaadt 550df930be7Sderaadt bad: 551df930be7Sderaadt error = EBADRPC; 552df930be7Sderaadt 553df930be7Sderaadt out: 554df930be7Sderaadt m_freem(m); 555df930be7Sderaadt return error; 556df930be7Sderaadt } 557df930be7Sderaadt 558f3f6cb75Sbriggs #endif /* ifdef NFSCLIENT */ 559