/* * Copyright (c) 1992, 1993, 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Rick Macklem at The University of Guelph. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static const char copyright[] = "@(#) Copyright (c) 1992, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95"; #endif static const char rcsid[] = "$FreeBSD$"; #endif /* not lint */ #include #include #include #include #include #include #include #include #ifdef NFSKERB #include #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mntopts.h" #include "mounttab.h" #define ALTF_BG 0x1 #define ALTF_NOCONN 0x2 #define ALTF_DUMBTIMR 0x4 #define ALTF_INTR 0x8 #define ALTF_KERB 0x10 #define ALTF_NFSV3 0x20 #define ALTF_RDIRPLUS 0x40 #define ALTF_MNTUDP 0x80 #define ALTF_RESVPORT 0x100 #define ALTF_SEQPACKET 0x200 #define ALTF_NQNFS 0x400 #define ALTF_SOFT 0x800 #define ALTF_TCP 0x1000 #define ALTF_PORT 0x2000 #define ALTF_NFSV2 0x4000 #define ALTF_ACREGMIN 0x8000 #define ALTF_ACREGMAX 0x10000 #define ALTF_ACDIRMIN 0x20000 #define ALTF_ACDIRMAX 0x40000 struct mntopt mopts[] = { MOPT_STDOPTS, MOPT_FORCE, MOPT_UPDATE, MOPT_ASYNC, { "bg", 0, ALTF_BG, 1 }, { "conn", 1, ALTF_NOCONN, 1 }, { "dumbtimer", 0, ALTF_DUMBTIMR, 1 }, { "intr", 0, ALTF_INTR, 1 }, #ifdef NFSKERB { "kerb", 0, ALTF_KERB, 1 }, #endif { "nfsv3", 0, ALTF_NFSV3, 1 }, { "rdirplus", 0, ALTF_RDIRPLUS, 1 }, { "mntudp", 0, ALTF_MNTUDP, 1 }, { "resvport", 0, ALTF_RESVPORT, 1 }, { "nqnfs", 0, ALTF_NQNFS, 1 }, { "soft", 0, ALTF_SOFT, 1 }, { "tcp", 0, ALTF_TCP, 1 }, { "port=", 0, ALTF_PORT, 1 }, { "nfsv2", 0, ALTF_NFSV2, 1 }, { "acregmin=", 0, ALTF_ACREGMIN, 1 }, { "acregmax=", 0, ALTF_ACREGMAX, 1 }, { "acdirmin=", 0, ALTF_ACDIRMIN, 1 }, { "acdirmax=", 0, ALTF_ACDIRMAX, 1 }, { NULL } }; struct nfs_args nfsdefargs = { NFS_ARGSVERSION, (struct sockaddr *)0, sizeof (struct sockaddr_in), SOCK_DGRAM, 0, (u_char *)0, 0, NFSMNT_RESVPORT, NFS_WSIZE, NFS_RSIZE, NFS_READDIRSIZE, 10, NFS_RETRANS, NFS_MAXGRPS, NFS_DEFRAHEAD, NQ_DEFLEASE, NQ_DEADTHRESH, (char *)0, /* args version 4 */ NFS_MINATTRTIMO, NFS_MAXATTRTIMO, NFS_MINDIRATTRTIMO, NFS_MAXDIRATTRTIMO, }; /* Table for af,sotype -> netid conversions. */ struct nc_protos { char *netid; int af; int sotype; } nc_protos[] = { {"udp", AF_INET, SOCK_DGRAM}, {"tcp", AF_INET, SOCK_STREAM}, {"udp6", AF_INET6, SOCK_DGRAM}, {"tcp6", AF_INET6, SOCK_STREAM}, {NULL} }; struct nfhret { u_long stat; long vers; long auth; long fhsize; u_char nfh[NFSX_V3FHMAX]; }; #define DEF_RETRY 10000 #define BGRND 1 #define ISBGRND 2 int retrycnt = DEF_RETRY; int opflags = 0; int nfsproto = IPPROTO_UDP; int mnttcp_ok = 1; char *portspec = NULL; /* Server nfs port; NULL means look up via rpcbind. */ enum mountmode { ANY, V2, V3 } mountmode = ANY; #ifdef NFSKERB char inst[INST_SZ]; char realm[REALM_SZ]; struct { u_long kind; KTEXT_ST kt; } ktick; struct nfsrpc_nickverf kverf; struct nfsrpc_fullblock kin, kout; NFSKERBKEY_T kivec; CREDENTIALS kcr; struct timeval ktv; NFSKERBKEYSCHED_T kerb_keysched; #endif /* Return codes for nfs_tryproto. */ enum tryret { TRYRET_SUCCESS, TRYRET_TIMEOUT, /* No response received. */ TRYRET_REMOTEERR, /* Error received from remote server. */ TRYRET_LOCALERR /* Local failure. */ }; int getnfsargs __P((char *, struct nfs_args *)); /* void set_rpc_maxgrouplist __P((int)); */ struct netconfig *getnetconf_cached(const char *netid); char *netidbytype(int af, int sotype); void usage __P((void)) __dead2; int xdr_dir __P((XDR *, char *)); int xdr_fh __P((XDR *, struct nfhret *)); enum tryret nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, char *hostp, char *spec, char **errstr); enum tryret returncode(enum clnt_stat stat, struct rpc_err *rpcerr); /* * Used to set mount flags with getmntopts. Call with dir=TRUE to * initialize altflags from the current mount flags. Call with * dir=FALSE to update mount flags with the new value of altflags after * the call to getmntopts. */ static void set_flags(int* altflags, int* nfsflags, int dir) { #define F2(af, nf) \ if (dir) { \ if (*nfsflags & NFSMNT_##nf) \ *altflags |= ALTF_##af; \ else \ *altflags &= ~ALTF_##af; \ } else { \ if (*altflags & ALTF_##af) \ *nfsflags |= NFSMNT_##nf; \ else \ *nfsflags &= ~NFSMNT_##nf; \ } #define F(f) F2(f,f) F(NOCONN); F(DUMBTIMR); F2(INTR, INT); #ifdef NFSKERB F(KERB); #endif F(RDIRPLUS); F(RESVPORT); F(NQNFS); F(SOFT); #undef F #undef F2 } int main(argc, argv) int argc; char *argv[]; { register int c; register struct nfs_args *nfsargsp; struct nfs_args nfsargs; struct nfsd_cargs ncd; int mntflags, altflags, nfssvc_flag, num; char *name, *p, *spec; char mntpath[MAXPATHLEN]; struct vfsconf vfc; int error = 0; #ifdef NFSKERB uid_t last_ruid; last_ruid = -1; (void)strcpy(realm, KRB_REALM); if (sizeof (struct nfsrpc_nickverf) != RPCX_NICKVERF || sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK || ((char *)&ktick.kt) - ((char *)&ktick) != NFSX_UNSIGNED || ((char *)ktick.kt.dat) - ((char *)&ktick) != 2 * NFSX_UNSIGNED) fprintf(stderr, "Yikes! NFSKERB structs not packed!!\n"); #endif /* NFSKERB */ retrycnt = DEF_RETRY; mntflags = 0; altflags = 0; nfsargs = nfsdefargs; nfsargsp = &nfsargs; while ((c = getopt(argc, argv, "23a:bcdD:g:I:iKL:lm:No:PpqR:r:sTt:w:x:U")) != -1) switch (c) { case '2': mountmode = V2; break; case '3': mountmode = V3; break; case 'a': num = strtol(optarg, &p, 10); if (*p || num < 0) errx(1, "illegal -a value -- %s", optarg); nfsargsp->readahead = num; nfsargsp->flags |= NFSMNT_READAHEAD; break; case 'b': opflags |= BGRND; break; case 'c': nfsargsp->flags |= NFSMNT_NOCONN; break; case 'D': num = strtol(optarg, &p, 10); if (*p || num <= 0) errx(1, "illegal -D value -- %s", optarg); nfsargsp->deadthresh = num; nfsargsp->flags |= NFSMNT_DEADTHRESH; break; case 'd': nfsargsp->flags |= NFSMNT_DUMBTIMR; break; #if 0 /* XXXX */ case 'g': num = strtol(optarg, &p, 10); if (*p || num <= 0) errx(1, "illegal -g value -- %s", optarg); set_rpc_maxgrouplist(num); nfsargsp->maxgrouplist = num; nfsargsp->flags |= NFSMNT_MAXGRPS; break; #endif case 'I': num = strtol(optarg, &p, 10); if (*p || num <= 0) errx(1, "illegal -I value -- %s", optarg); nfsargsp->readdirsize = num; nfsargsp->flags |= NFSMNT_READDIRSIZE; break; case 'i': nfsargsp->flags |= NFSMNT_INT; break; #ifdef NFSKERB case 'K': nfsargsp->flags |= NFSMNT_KERB; break; #endif case 'L': num = strtol(optarg, &p, 10); if (*p || num < 2) errx(1, "illegal -L value -- %s", optarg); nfsargsp->leaseterm = num; nfsargsp->flags |= NFSMNT_LEASETERM; break; case 'l': nfsargsp->flags |= NFSMNT_RDIRPLUS; break; #ifdef NFSKERB case 'm': (void)strncpy(realm, optarg, REALM_SZ - 1); realm[REALM_SZ - 1] = '\0'; break; #endif case 'N': nfsargsp->flags &= ~NFSMNT_RESVPORT; break; case 'o': altflags = 0; set_flags(&altflags, &nfsargsp->flags, TRUE); if (mountmode == V2) altflags |= ALTF_NFSV2; else if (mountmode == V3) altflags |= ALTF_NFSV3; getmntopts(optarg, mopts, &mntflags, &altflags); set_flags(&altflags, &nfsargsp->flags, FALSE); /* * Handle altflags which don't map directly to * mount flags. */ if(altflags & ALTF_BG) opflags |= BGRND; if(altflags & ALTF_MNTUDP) mnttcp_ok = 0; if(altflags & ALTF_TCP) { nfsargsp->sotype = SOCK_STREAM; nfsproto = IPPROTO_TCP; } if(altflags & ALTF_PORT) { /* * XXX Converting from a string to an int * and back again is silly, and we should * allow /etc/services names. */ asprintf(&portspec, "%d", atoi(strstr(optarg, "port=") + 5)); if (portspec == NULL) err(1, "asprintf"); } mountmode = ANY; if(altflags & ALTF_NFSV2) mountmode = V2; if(altflags & ALTF_NFSV3) mountmode = V3; if(altflags & ALTF_ACREGMIN) nfsargsp->acregmin = atoi(strstr(optarg, "acregmin=") + 9); if(altflags & ALTF_ACREGMAX) nfsargsp->acregmax = atoi(strstr(optarg, "acregmax=") + 9); if(altflags & ALTF_ACDIRMIN) nfsargsp->acdirmin = atoi(strstr(optarg, "acdirmin=") + 9); if(altflags & ALTF_ACDIRMAX) nfsargsp->acdirmax = atoi(strstr(optarg, "acdirmax=") + 9); break; case 'P': /* obsolete for NFSMNT_RESVPORT, now default */ break; case 'q': mountmode = V3; nfsargsp->flags |= NFSMNT_NQNFS; break; case 'R': num = strtol(optarg, &p, 10); if (*p || num <= 0) errx(1, "illegal -R value -- %s", optarg); retrycnt = num; break; case 'r': num = strtol(optarg, &p, 10); if (*p || num <= 0) errx(1, "illegal -r value -- %s", optarg); nfsargsp->rsize = num; nfsargsp->flags |= NFSMNT_RSIZE; break; case 's': nfsargsp->flags |= NFSMNT_SOFT; break; case 'T': nfsargsp->sotype = SOCK_STREAM; nfsproto = IPPROTO_TCP; break; case 't': num = strtol(optarg, &p, 10); if (*p || num <= 0) errx(1, "illegal -t value -- %s", optarg); nfsargsp->timeo = num; nfsargsp->flags |= NFSMNT_TIMEO; break; case 'w': num = strtol(optarg, &p, 10); if (*p || num <= 0) errx(1, "illegal -w value -- %s", optarg); nfsargsp->wsize = num; nfsargsp->flags |= NFSMNT_WSIZE; break; case 'x': num = strtol(optarg, &p, 10); if (*p || num <= 0) errx(1, "illegal -x value -- %s", optarg); nfsargsp->retrans = num; nfsargsp->flags |= NFSMNT_RETRANS; break; case 'U': mnttcp_ok = 0; break; default: usage(); break; } argc -= optind; argv += optind; if (argc != 2) { usage(); /* NOTREACHED */ } spec = *argv++; name = *argv; if (!getnfsargs(spec, nfsargsp)) exit(1); /* resolve the mountpoint with realpath(3) */ (void)checkpath(name, mntpath); error = getvfsbyname("nfs", &vfc); if (error && vfsisloadable("nfs")) { if(vfsload("nfs")) err(EX_OSERR, "vfsload(nfs)"); endvfsent(); /* clear cache */ error = getvfsbyname("nfs", &vfc); } if (error) errx(EX_OSERR, "nfs filesystem is not available"); if (mount(vfc.vfc_name, mntpath, mntflags, nfsargsp)) err(1, "%s", mntpath); if (nfsargsp->flags & (NFSMNT_NQNFS | NFSMNT_KERB)) { if ((opflags & ISBGRND) == 0) { if (daemon(0, 0) != 0) err(1, "daemon"); } openlog("mount_nfs", LOG_PID, LOG_DAEMON); nfssvc_flag = NFSSVC_MNTD; ncd.ncd_dirp = mntpath; while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) { if (errno != ENEEDAUTH) { syslog(LOG_ERR, "nfssvc err %m"); continue; } nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL; #ifdef NFSKERB /* * Set up as ncd_authuid for the kerberos call. * Must set ruid to ncd_authuid and reset the * ticket name iff ncd_authuid is not the same * as last time, so that the right ticket file * is found. * Get the Kerberos credential structure so that * we have the session key and get a ticket for * this uid. * For more info see the IETF Draft "Authentication * in ONC RPC". */ if (ncd.ncd_authuid != last_ruid) { char buf[512]; (void)sprintf(buf, "%s%d", TKT_ROOT, ncd.ncd_authuid); krb_set_tkt_string(buf); last_ruid = ncd.ncd_authuid; } setreuid(ncd.ncd_authuid, 0); kret = krb_get_cred(NFS_KERBSRV, inst, realm, &kcr); if (kret == RET_NOTKT) { kret = get_ad_tkt(NFS_KERBSRV, inst, realm, DEFAULT_TKT_LIFE); if (kret == KSUCCESS) kret = krb_get_cred(NFS_KERBSRV, inst, realm, &kcr); } if (kret == KSUCCESS) kret = krb_mk_req(&ktick.kt, NFS_KERBSRV, inst, realm, 0); /* * Fill in the AKN_FULLNAME authenticator and verifier. * Along with the Kerberos ticket, we need to build * the timestamp verifier and encrypt it in CBC mode. */ if (kret == KSUCCESS && ktick.kt.length <= (RPCAUTH_MAXSIZ-3*NFSX_UNSIGNED) && gettimeofday(&ktv, (struct timezone *)0) == 0) { ncd.ncd_authtype = RPCAUTH_KERB4; ncd.ncd_authstr = (u_char *)&ktick; ncd.ncd_authlen = nfsm_rndup(ktick.kt.length) + 3 * NFSX_UNSIGNED; ncd.ncd_verfstr = (u_char *)&kverf; ncd.ncd_verflen = sizeof (kverf); memmove(ncd.ncd_key, kcr.session, sizeof (kcr.session)); kin.t1 = htonl(ktv.tv_sec); kin.t2 = htonl(ktv.tv_usec); kin.w1 = htonl(NFS_KERBTTL); kin.w2 = htonl(NFS_KERBTTL - 1); bzero((caddr_t)kivec, sizeof (kivec)); /* * Encrypt kin in CBC mode using the session * key in kcr. */ XXX /* * Finally, fill the timestamp verifier into the * authenticator and verifier. */ ktick.kind = htonl(RPCAKN_FULLNAME); kverf.kind = htonl(RPCAKN_FULLNAME); NFS_KERBW1(ktick.kt) = kout.w1; ktick.kt.length = htonl(ktick.kt.length); kverf.verf.t1 = kout.t1; kverf.verf.t2 = kout.t2; kverf.verf.w2 = kout.w2; nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH; } setreuid(0, 0); #endif /* NFSKERB */ } } exit(0); } int getnfsargs(spec, nfsargsp) char *spec; struct nfs_args *nfsargsp; { struct addrinfo hints, *ai_nfs, *ai; #ifdef NFSKERB char host[NI_MAXHOST], serv[NI_MAXSERV]; #endif enum tryret ret; int ecode, speclen, remoteerr; char *hostp, *delimp, *errstr; #ifdef NFSKERB char *cp; #endif size_t len; static char nam[MNAMELEN + 1]; if ((delimp = strrchr(spec, ':')) != NULL) { hostp = spec; spec = delimp + 1; } else if ((delimp = strrchr(spec, '@')) != NULL) { warnx("path@server syntax is deprecated, use server:path"); hostp = delimp + 1; } else { warnx("no : nfs-name"); return (0); } *delimp = '\0'; /* * If there has been a trailing slash at mounttime it seems * that some mountd implementations fail to remove the mount * entries from their mountlist while unmounting. */ for (speclen = strlen(spec); speclen > 1 && spec[speclen - 1] == '/'; speclen--) spec[speclen - 1] = '\0'; if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) { warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG)); return (0); } /* Make both '@' and ':' notations equal */ if (*hostp != '\0') { len = strlen(hostp); memmove(nam, hostp, len); nam[len] = ':'; memmove(nam + len + 1, spec, speclen); nam[len + speclen + 1] = '\0'; } /* * Handle an internet host address and reverse resolve it if * doing Kerberos. */ memset(&hints, 0, sizeof hints); hints.ai_flags = AI_NUMERICHOST; hints.ai_socktype = nfsargsp->sotype; if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) == 0) { #ifdef NFSKERB if ((nfsargsp->flags & NFSMNT_KERB)) { hints.ai_flags = 0; if (getnameinfo(ai_nfs->ai_addr, ai_nfs->ai_addrlen, host, sizeof host, serv, sizeof serv, 0) != 0) { warnx("can't reverse resolve net address"); return (0); } hostp = host; } #endif /* NFSKERB */ } else { hints.ai_flags = 0; if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs)) != 0) { if (portspec == NULL) errx(1, "%s: %s", hostp, gai_strerror(ecode)); else errx(1, "%s:%s: %s", hostp, portspec, gai_strerror(ecode)); return (0); } } #ifdef NFSKERB if (nfsargsp->flags & NFSMNT_KERB) { strncpy(inst, hp->h_name, INST_SZ); inst[INST_SZ - 1] = '\0'; if (cp = strchr(inst, '.')) *cp = '\0'; } #endif /* NFSKERB */ ret = TRYRET_LOCALERR; while (retrycnt > 0) { /* * Try each entry returned by getaddrinfo(). Note the * occurence of remote errors by setting `remoteerr'. */ remoteerr = 0; for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) { ret = nfs_tryproto(nfsargsp, ai, hostp, spec, &errstr); if (ret == TRYRET_SUCCESS) break; if (ret != TRYRET_LOCALERR) remoteerr = 1; if ((opflags & ISBGRND) == 0) fprintf(stderr, "%s\n", errstr); } if (ret == TRYRET_SUCCESS) break; /* * Exit on failures if not BGRND mode, or if all errors * were local. */ if ((opflags & BGRND) == 0 || !remoteerr) exit(1); if (--retrycnt <= 0) exit(1); if ((opflags & (BGRND | ISBGRND)) == BGRND) { warnx("Cannot immediately mount %s:%s, backgrounding", hostp, spec); opflags |= ISBGRND; if (daemon(0, 0) != 0) err(1, "daemon"); } sleep(60); } freeaddrinfo(ai_nfs); nfsargsp->hostname = nam; /* Add mounted filesystem to PATH_MOUNTTAB */ if (!add_mtab(hostp, spec)) warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec); return (1); } /* * Try to set up the NFS arguments according to the address * family, protocol (and possibly port) specified in `ai'. * * Returns TRYRET_SUCCESS if successful, or: * TRYRET_TIMEOUT The server did not respond. * TRYRET_REMOTEERR The server reported an error. * TRYRET_LOCALERR Local failure. * * In all error cases, *errstr will be set to a statically-allocated string * describing the error. */ enum tryret nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, char *hostp, char *spec, char **errstr) { static char errbuf[256]; struct sockaddr_storage nfs_ss; struct netbuf nfs_nb; struct nfhret nfhret; struct timeval try; struct rpc_err rpcerr; CLIENT *clp; struct netconfig *nconf, *nconf_mnt; char *netid, *netid_mnt; int doconnect, nfsvers, mntvers; enum clnt_stat stat; enum mountmode trymntmode; trymntmode = mountmode; errbuf[0] = '\0'; *errstr = errbuf; if ((netid = netidbytype(ai->ai_family, nfsargsp->sotype)) == NULL) { snprintf(errbuf, sizeof errbuf, "af %d sotype %d not supported", ai->ai_family, nfsargsp->sotype); return (TRYRET_LOCALERR); } if ((nconf = getnetconf_cached(netid)) == NULL) { snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror()); return (TRYRET_LOCALERR); } /* The RPCPROG_MNT netid may be different. */ if (mnttcp_ok) { netid_mnt = netid; nconf_mnt = nconf; } else { if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM)) == NULL) { snprintf(errbuf, sizeof errbuf, "af %d sotype SOCK_DGRAM not supported", ai->ai_family); return (TRYRET_LOCALERR); } if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) { snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt, nc_sperror()); return (TRYRET_LOCALERR); } } tryagain: if (trymntmode == V2) { nfsvers = 2; mntvers = 1; } else { nfsvers = 3; mntvers = 3; } if (portspec != NULL) { /* `ai' contains the complete nfsd sockaddr. */ nfs_nb.buf = ai->ai_addr; nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen; } else { /* Ask the remote rpcbind. */ nfs_nb.buf = &nfs_ss; nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss; if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb, hostp)) { if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) { trymntmode = V2; goto tryagain; } snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, hostp, spec, clnt_spcreateerror("RPCPROG_NFS")); return (returncode(rpc_createerr.cf_stat, &rpc_createerr.cf_error)); } } /* Check that the server (nfsd) responds on the port we have chosen. */ clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, RPCPROG_NFS, nfsvers, 0, 0); if (clp == NULL) { snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS")); return (returncode(rpc_createerr.cf_stat, &rpc_createerr.cf_error)); } if (nfsargsp->sotype == SOCK_DGRAM) { /* * Use connect(), to match what the kernel does. This * catches cases where the server responds from the * wrong source address. */ doconnect = 1; if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) { clnt_destroy(clp); snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp, spec); return (TRYRET_LOCALERR); } } try.tv_sec = 10; try.tv_usec = 0; stat = clnt_call(clp, NFSPROC_NULL, xdr_void, NULL, xdr_void, NULL, try); if (stat != RPC_SUCCESS) { if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) { clnt_destroy(clp); trymntmode = V2; goto tryagain; } clnt_geterr(clp, &rpcerr); snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, hostp, spec, clnt_sperror(clp, "NFSPROC_NULL")); clnt_destroy(clp); return (returncode(stat, &rpcerr)); } clnt_destroy(clp); /* Send the RPCMNT_MOUNT RPC to get the root filehandle. */ try.tv_sec = 10; try.tv_usec = 0; clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, nconf_mnt); if (clp == NULL) { snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create")); return (returncode(rpc_createerr.cf_stat, &rpc_createerr.cf_error)); } clp->cl_auth = authsys_create_default(); if (nfsargsp->flags & NFSMNT_KERB) nfhret.auth = RPCAUTH_KERB4; else nfhret.auth = RPCAUTH_UNIX; nfhret.vers = mntvers; stat = clnt_call(clp, RPCMNT_MOUNT, xdr_dir, spec, xdr_fh, &nfhret, try); auth_destroy(clp->cl_auth); if (stat != RPC_SUCCESS) { if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) { clnt_destroy(clp); trymntmode = V2; goto tryagain; } clnt_geterr(clp, &rpcerr); snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, hostp, spec, clnt_sperror(clp, "RPCPROG_MNT")); clnt_destroy(clp); return (returncode(stat, &rpcerr)); } clnt_destroy(clp); if (nfhret.stat != 0) { snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, hostp, spec, strerror(nfhret.stat)); return (TRYRET_REMOTEERR); } /* * Store the filehandle and server address in nfsargsp, making * sure to copy any locally allocated structures. */ nfsargsp->addrlen = nfs_nb.len; nfsargsp->addr = malloc(nfsargsp->addrlen); nfsargsp->fhsize = nfhret.fhsize; nfsargsp->fh = malloc(nfsargsp->fhsize); if (nfsargsp->addr == NULL || nfsargsp->fh == NULL) err(1, "malloc"); bcopy(nfs_nb.buf, nfsargsp->addr, nfsargsp->addrlen); bcopy(nfhret.nfh, nfsargsp->fh, nfsargsp->fhsize); if (nfsvers == 3) nfsargsp->flags |= NFSMNT_NFSV3; else nfsargsp->flags &= ~NFSMNT_NFSV3; return (TRYRET_SUCCESS); } /* * Catagorise a RPC return status and error into an `enum tryret' * return code. */ enum tryret returncode(enum clnt_stat stat, struct rpc_err *rpcerr) { switch (stat) { case RPC_TIMEDOUT: return (TRYRET_TIMEOUT); case RPC_PMAPFAILURE: case RPC_PROGNOTREGISTERED: case RPC_PROGVERSMISMATCH: /* XXX, these can be local or remote. */ case RPC_CANTSEND: case RPC_CANTRECV: return (TRYRET_REMOTEERR); case RPC_SYSTEMERROR: switch (rpcerr->re_errno) { case ETIMEDOUT: return (TRYRET_TIMEOUT); case ENOMEM: break; default: return (TRYRET_REMOTEERR); } /* FALLTHROUGH */ default: break; } return (TRYRET_LOCALERR); } /* * Look up a netid based on an address family and socket type. * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM. * * XXX there should be a library function for this. */ char * netidbytype(int af, int sotype) { struct nc_protos *p; for (p = nc_protos; p->netid != NULL; p++) { if (af != p->af || sotype != p->sotype) continue; return (p->netid); } return (NULL); } /* * Look up a netconfig entry based on a netid, and cache the result so * that we don't need to remember to call freenetconfigent(). * * Otherwise it behaves just like getnetconfigent(), so nc_*error() * work on failure. */ struct netconfig * getnetconf_cached(const char *netid) { static struct nc_entry { struct netconfig *nconf; struct nc_entry *next; } *head; struct nc_entry *p; struct netconfig *nconf; for (p = head; p != NULL; p = p->next) if (strcmp(netid, p->nconf->nc_netid) == 0) return (p->nconf); if ((nconf = getnetconfigent(netid)) == NULL) return (NULL); if ((p = malloc(sizeof(*p))) == NULL) err(1, "malloc"); p->nconf = nconf; p->next = head; head = p; return (p->nconf); } /* * xdr routines for mount rpc's */ int xdr_dir(xdrsp, dirp) XDR *xdrsp; char *dirp; { return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); } int xdr_fh(xdrsp, np) XDR *xdrsp; register struct nfhret *np; { register int i; long auth, authcnt, authfnd = 0; if (!xdr_u_long(xdrsp, &np->stat)) return (0); if (np->stat) return (1); switch (np->vers) { case 1: np->fhsize = NFSX_V2FH; return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH)); case 3: if (!xdr_long(xdrsp, &np->fhsize)) return (0); if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX) return (0); if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) return (0); if (!xdr_long(xdrsp, &authcnt)) return (0); for (i = 0; i < authcnt; i++) { if (!xdr_long(xdrsp, &auth)) return (0); if (auth == np->auth) authfnd++; } /* * Some servers, such as DEC's OSF/1 return a nil authenticator * list to indicate RPCAUTH_UNIX. */ if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX)) np->stat = EAUTH; return (1); }; return (0); } void usage() { (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", "usage: mount_nfs [-23KNPTUbcdilqs] [-D deadthresh] [-I readdirsize]", " [-L leaseterm] [-R retrycnt] [-a maxreadahead]", " [-g maxgroups] [-m realm] [-o options] [-r readsize]", " [-t timeout] [-w writesize] [-x retrans] rhost:path node"); exit(1); }