17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 227c478bd9Sstevel@tonic-gate /* 237c478bd9Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate #include <sys/types.h> 307c478bd9Sstevel@tonic-gate #include <sys/fm/util.h> 317c478bd9Sstevel@tonic-gate 327c478bd9Sstevel@tonic-gate #include <netdir.h> 337c478bd9Sstevel@tonic-gate #include <strings.h> 347c478bd9Sstevel@tonic-gate #include <alloca.h> 357c478bd9Sstevel@tonic-gate #include <limits.h> 367c478bd9Sstevel@tonic-gate #include <unistd.h> 377c478bd9Sstevel@tonic-gate #include <ucred.h> 387c478bd9Sstevel@tonic-gate #include <priv.h> 397c478bd9Sstevel@tonic-gate 407c478bd9Sstevel@tonic-gate #include <fmd_rpc_api.h> 417c478bd9Sstevel@tonic-gate #include <fmd_rpc_adm.h> 427c478bd9Sstevel@tonic-gate #include <rpc/svc_mt.h> 437c478bd9Sstevel@tonic-gate 447c478bd9Sstevel@tonic-gate #include <fmd_subr.h> 457c478bd9Sstevel@tonic-gate #include <fmd_error.h> 467c478bd9Sstevel@tonic-gate #include <fmd_thread.h> 477c478bd9Sstevel@tonic-gate #include <fmd_conf.h> 487c478bd9Sstevel@tonic-gate #include <fmd_api.h> 497c478bd9Sstevel@tonic-gate #include <fmd.h> 507c478bd9Sstevel@tonic-gate 517c478bd9Sstevel@tonic-gate /* 527c478bd9Sstevel@tonic-gate * Define range of transient RPC program numbers to use for transient bindings. 537c478bd9Sstevel@tonic-gate * These are defined in the Solaris ONC+ Developer's Guide, Appendix B, but 547c478bd9Sstevel@tonic-gate * are cleverly not defined in any ONC+ standard system header file. 557c478bd9Sstevel@tonic-gate */ 567c478bd9Sstevel@tonic-gate #define RPC_TRANS_MIN 0x40000000 577c478bd9Sstevel@tonic-gate #define RPC_TRANS_MAX 0x5fffffff 587c478bd9Sstevel@tonic-gate 597c478bd9Sstevel@tonic-gate /* 607c478bd9Sstevel@tonic-gate * We use our own private version of svc_create() which registers our services 617c478bd9Sstevel@tonic-gate * only on loopback transports and enables an option whereby Solaris ucreds 627c478bd9Sstevel@tonic-gate * are associated with each connection, permitting us to check privilege bits. 637c478bd9Sstevel@tonic-gate */ 647c478bd9Sstevel@tonic-gate static int 657c478bd9Sstevel@tonic-gate fmd_rpc_svc_create_local(void (*disp)(struct svc_req *, SVCXPRT *), 667c478bd9Sstevel@tonic-gate rpcprog_t prog, rpcvers_t vers, uint_t ssz, uint_t rsz, int force) 677c478bd9Sstevel@tonic-gate { 687c478bd9Sstevel@tonic-gate struct netconfig *ncp; 697c478bd9Sstevel@tonic-gate struct netbuf buf; 707c478bd9Sstevel@tonic-gate SVCXPRT *xprt; 717c478bd9Sstevel@tonic-gate void *hdl; 727c478bd9Sstevel@tonic-gate int fd, n = 0; 737c478bd9Sstevel@tonic-gate 747c478bd9Sstevel@tonic-gate char door[PATH_MAX]; 757c478bd9Sstevel@tonic-gate time_t tm; 767c478bd9Sstevel@tonic-gate 777c478bd9Sstevel@tonic-gate if ((hdl = setnetconfig()) == NULL) { 787c478bd9Sstevel@tonic-gate fmd_error(EFMD_RPC_REG, "failed to iterate over " 797c478bd9Sstevel@tonic-gate "netconfig database: %s\n", nc_sperror()); 807c478bd9Sstevel@tonic-gate return (fmd_set_errno(EFMD_RPC_REG)); 817c478bd9Sstevel@tonic-gate } 827c478bd9Sstevel@tonic-gate 837c478bd9Sstevel@tonic-gate if (force) 847c478bd9Sstevel@tonic-gate svc_unreg(prog, vers); /* clear stale rpcbind registrations */ 857c478bd9Sstevel@tonic-gate 867c478bd9Sstevel@tonic-gate buf.buf = alloca(_SS_MAXSIZE); 877c478bd9Sstevel@tonic-gate buf.maxlen = _SS_MAXSIZE; 887c478bd9Sstevel@tonic-gate buf.len = 0; 897c478bd9Sstevel@tonic-gate 907c478bd9Sstevel@tonic-gate while ((ncp = getnetconfig(hdl)) != NULL) { 917c478bd9Sstevel@tonic-gate if (strcmp(ncp->nc_protofmly, NC_LOOPBACK) != 0) 927c478bd9Sstevel@tonic-gate continue; 937c478bd9Sstevel@tonic-gate 94*d9638e54Smws if (!force && rpcb_getaddr(prog, vers, ncp, &buf, HOST_SELF)) { 95*d9638e54Smws (void) endnetconfig(hdl); 967c478bd9Sstevel@tonic-gate return (fmd_set_errno(EFMD_RPC_BOUND)); 97*d9638e54Smws } 987c478bd9Sstevel@tonic-gate 997c478bd9Sstevel@tonic-gate if ((fd = t_open(ncp->nc_device, O_RDWR, NULL)) == -1) { 1007c478bd9Sstevel@tonic-gate fmd_error(EFMD_RPC_REG, "failed to open %s: %s\n", 1017c478bd9Sstevel@tonic-gate ncp->nc_device, t_strerror(t_errno)); 1027c478bd9Sstevel@tonic-gate continue; 1037c478bd9Sstevel@tonic-gate } 1047c478bd9Sstevel@tonic-gate 1057c478bd9Sstevel@tonic-gate svc_fd_negotiate_ucred(fd); /* enable ucred option on xprt */ 1067c478bd9Sstevel@tonic-gate 1077c478bd9Sstevel@tonic-gate if ((xprt = svc_tli_create(fd, ncp, NULL, ssz, rsz)) == NULL) { 1087c478bd9Sstevel@tonic-gate (void) t_close(fd); 1097c478bd9Sstevel@tonic-gate continue; 1107c478bd9Sstevel@tonic-gate } 1117c478bd9Sstevel@tonic-gate 1127c478bd9Sstevel@tonic-gate if (svc_reg(xprt, prog, vers, disp, ncp) == FALSE) { 1137c478bd9Sstevel@tonic-gate fmd_error(EFMD_RPC_REG, "failed to register " 1147c478bd9Sstevel@tonic-gate "rpc service on %s\n", ncp->nc_netid); 1157c478bd9Sstevel@tonic-gate svc_destroy(xprt); 1167c478bd9Sstevel@tonic-gate continue; 1177c478bd9Sstevel@tonic-gate } 1187c478bd9Sstevel@tonic-gate 1197c478bd9Sstevel@tonic-gate n++; 1207c478bd9Sstevel@tonic-gate } 1217c478bd9Sstevel@tonic-gate 1227c478bd9Sstevel@tonic-gate (void) endnetconfig(hdl); 1237c478bd9Sstevel@tonic-gate 1247c478bd9Sstevel@tonic-gate /* 1257c478bd9Sstevel@tonic-gate * If we failed to register services (n == 0) because rpcbind is down, 1267c478bd9Sstevel@tonic-gate * then check to see if the RPC door file exists before attempting an 1277c478bd9Sstevel@tonic-gate * svc_door_create(), which cleverly destroys any existing door file. 1287c478bd9Sstevel@tonic-gate * The RPC APIs have no stable errnos, so we use rpcb_gettime() as a 1297c478bd9Sstevel@tonic-gate * hack to determine if rpcbind itself is down. 1307c478bd9Sstevel@tonic-gate */ 1317c478bd9Sstevel@tonic-gate if (!force && n == 0 && rpcb_gettime(HOST_SELF, &tm) == FALSE && 1327c478bd9Sstevel@tonic-gate snprintf(door, sizeof (door), RPC_DOOR_RENDEZVOUS, 1337c478bd9Sstevel@tonic-gate prog, vers) > 0 && access(door, F_OK) == 0) 1347c478bd9Sstevel@tonic-gate return (fmd_set_errno(EFMD_RPC_BOUND)); 1357c478bd9Sstevel@tonic-gate 1367c478bd9Sstevel@tonic-gate /* 137*d9638e54Smws * Attempt to create a door server for the RPC program as well. Limit 138*d9638e54Smws * the maximum request size for the door transport to the receive size. 1397c478bd9Sstevel@tonic-gate */ 1407c478bd9Sstevel@tonic-gate if ((xprt = svc_door_create(disp, prog, vers, ssz)) == NULL) { 1417c478bd9Sstevel@tonic-gate fmd_error(EFMD_RPC_REG, "failed to create door for " 1427c478bd9Sstevel@tonic-gate "rpc service 0x%lx/0x%lx\n", prog, vers); 1437c478bd9Sstevel@tonic-gate } else { 1447c478bd9Sstevel@tonic-gate (void) svc_control(xprt, SVCSET_CONNMAXREC, &rsz); 1457c478bd9Sstevel@tonic-gate n++; 1467c478bd9Sstevel@tonic-gate } 1477c478bd9Sstevel@tonic-gate 1487c478bd9Sstevel@tonic-gate return (n); 1497c478bd9Sstevel@tonic-gate } 1507c478bd9Sstevel@tonic-gate 1517c478bd9Sstevel@tonic-gate static int 1527c478bd9Sstevel@tonic-gate fmd_rpc_svc_init(void (*disp)(struct svc_req *, SVCXPRT *), 1537c478bd9Sstevel@tonic-gate const char *name, const char *path, const char *prop, 1547c478bd9Sstevel@tonic-gate rpcprog_t pmin, rpcprog_t pmax, rpcvers_t vers, 1557c478bd9Sstevel@tonic-gate uint_t sndsize, uint_t rcvsize, int force) 1567c478bd9Sstevel@tonic-gate { 1577c478bd9Sstevel@tonic-gate rpcprog_t prog; 1587c478bd9Sstevel@tonic-gate char buf[16]; 1597c478bd9Sstevel@tonic-gate FILE *fp; 1607c478bd9Sstevel@tonic-gate 1617c478bd9Sstevel@tonic-gate for (prog = pmin; prog <= pmax; prog++) { 1627c478bd9Sstevel@tonic-gate if (fmd_rpc_svc_create_local(disp, prog, vers, 1637c478bd9Sstevel@tonic-gate sndsize, rcvsize, force) > 0) { 1647c478bd9Sstevel@tonic-gate fmd_dprintf(FMD_DBG_RPC, "registered %s rpc service " 1657c478bd9Sstevel@tonic-gate "as 0x%lx.%lx\n", name, prog, vers); 1667c478bd9Sstevel@tonic-gate 1677c478bd9Sstevel@tonic-gate /* 1687c478bd9Sstevel@tonic-gate * To aid simulator scripts, save our RPC "digits" in 1697c478bd9Sstevel@tonic-gate * the specified file for rendezvous with libfmd_adm. 1707c478bd9Sstevel@tonic-gate */ 1717c478bd9Sstevel@tonic-gate if (path != NULL && (fp = fopen(path, "w")) != NULL) { 1727c478bd9Sstevel@tonic-gate (void) fprintf(fp, "%ld\n", prog); 1737c478bd9Sstevel@tonic-gate (void) fclose(fp); 1747c478bd9Sstevel@tonic-gate } 1757c478bd9Sstevel@tonic-gate 1767c478bd9Sstevel@tonic-gate (void) snprintf(buf, sizeof (buf), "%ld", prog); 1777c478bd9Sstevel@tonic-gate (void) fmd_conf_setprop(fmd.d_conf, prop, buf); 1787c478bd9Sstevel@tonic-gate 1797c478bd9Sstevel@tonic-gate return (0); 1807c478bd9Sstevel@tonic-gate } 1817c478bd9Sstevel@tonic-gate } 1827c478bd9Sstevel@tonic-gate 1837c478bd9Sstevel@tonic-gate return (-1); /* errno is set for us */ 1847c478bd9Sstevel@tonic-gate } 1857c478bd9Sstevel@tonic-gate 1867c478bd9Sstevel@tonic-gate void 1877c478bd9Sstevel@tonic-gate fmd_rpc_init(void) 1887c478bd9Sstevel@tonic-gate { 189*d9638e54Smws int err, prog, mode = RPC_SVC_MT_USER; 1907c478bd9Sstevel@tonic-gate uint64_t sndsize = 0, rcvsize = 0; 191*d9638e54Smws const char *s; 1927c478bd9Sstevel@tonic-gate 1937c478bd9Sstevel@tonic-gate if (rpc_control(RPC_SVC_MTMODE_SET, &mode) == FALSE) 1947c478bd9Sstevel@tonic-gate fmd_panic("failed to enable user-MT rpc mode"); 1957c478bd9Sstevel@tonic-gate 1967c478bd9Sstevel@tonic-gate (void) fmd_conf_getprop(fmd.d_conf, "rpc.sndsize", &sndsize); 1977c478bd9Sstevel@tonic-gate (void) fmd_conf_getprop(fmd.d_conf, "rpc.rcvsize", &rcvsize); 1987c478bd9Sstevel@tonic-gate 1997c478bd9Sstevel@tonic-gate /* 2007c478bd9Sstevel@tonic-gate * Infer whether we are the "default" fault manager or an alternate one 201*d9638e54Smws * based on whether the initial setting of rpc.adm.prog is non-zero. 2027c478bd9Sstevel@tonic-gate */ 203*d9638e54Smws (void) fmd_conf_getprop(fmd.d_conf, "rpc.adm.prog", &prog); 2047c478bd9Sstevel@tonic-gate (void) fmd_conf_getprop(fmd.d_conf, "rpc.adm.path", &s); 2057c478bd9Sstevel@tonic-gate 206*d9638e54Smws if (prog != 0) { 2077c478bd9Sstevel@tonic-gate err = fmd_rpc_svc_init(fmd_adm_1, "FMD_ADM", s, "rpc.adm.prog", 2087c478bd9Sstevel@tonic-gate FMD_ADM, FMD_ADM, FMD_ADM_VERSION_1, 2097c478bd9Sstevel@tonic-gate (uint_t)sndsize, (uint_t)rcvsize, TRUE); 2107c478bd9Sstevel@tonic-gate } else { 2117c478bd9Sstevel@tonic-gate err = fmd_rpc_svc_init(fmd_adm_1, "FMD_ADM", s, "rpc.adm.prog", 2127c478bd9Sstevel@tonic-gate RPC_TRANS_MIN, RPC_TRANS_MAX, FMD_ADM_VERSION_1, 2137c478bd9Sstevel@tonic-gate (uint_t)sndsize, (uint_t)rcvsize, FALSE); 2147c478bd9Sstevel@tonic-gate } 2157c478bd9Sstevel@tonic-gate 2167c478bd9Sstevel@tonic-gate if (err != 0) 2177c478bd9Sstevel@tonic-gate fmd_error(EFMD_EXIT, "failed to create rpc server bindings"); 2187c478bd9Sstevel@tonic-gate 2197c478bd9Sstevel@tonic-gate if (fmd_thread_create(fmd.d_rmod, (fmd_thread_f *)svc_run, 0) == NULL) 2207c478bd9Sstevel@tonic-gate fmd_error(EFMD_EXIT, "failed to create rpc server thread"); 2217c478bd9Sstevel@tonic-gate } 2227c478bd9Sstevel@tonic-gate 2237c478bd9Sstevel@tonic-gate void 2247c478bd9Sstevel@tonic-gate fmd_rpc_fini(void) 2257c478bd9Sstevel@tonic-gate { 2267c478bd9Sstevel@tonic-gate rpcprog_t prog; 2277c478bd9Sstevel@tonic-gate 2287c478bd9Sstevel@tonic-gate svc_exit(); /* force svc_run() threads to exit */ 2297c478bd9Sstevel@tonic-gate 2307c478bd9Sstevel@tonic-gate (void) fmd_conf_getprop(fmd.d_conf, "rpc.adm.prog", &prog); 2317c478bd9Sstevel@tonic-gate svc_unreg(prog, FMD_ADM_VERSION_1); 2327c478bd9Sstevel@tonic-gate 2337c478bd9Sstevel@tonic-gate (void) fmd_conf_getprop(fmd.d_conf, "rpc.api.prog", &prog); 2347c478bd9Sstevel@tonic-gate svc_unreg(prog, FMD_API_VERSION_1); 2357c478bd9Sstevel@tonic-gate } 2367c478bd9Sstevel@tonic-gate 2377c478bd9Sstevel@tonic-gate /* 2387c478bd9Sstevel@tonic-gate * Utillity function to fetch the XPRT's ucred and determine if we should deny 2397c478bd9Sstevel@tonic-gate * the request. For now, we implement a simple policy of rejecting any caller 2407c478bd9Sstevel@tonic-gate * who does not have the PRIV_SYS_CONFIG bit in their Effective privilege set, 2417c478bd9Sstevel@tonic-gate * unless the caller is loading a module, which requires all privileges. 2427c478bd9Sstevel@tonic-gate */ 2437c478bd9Sstevel@tonic-gate int 2447c478bd9Sstevel@tonic-gate fmd_rpc_deny(struct svc_req *rqp) 2457c478bd9Sstevel@tonic-gate { 2467c478bd9Sstevel@tonic-gate ucred_t *ucp = alloca(ucred_size()); 2477c478bd9Sstevel@tonic-gate const priv_set_t *psp; 2487c478bd9Sstevel@tonic-gate 2497c478bd9Sstevel@tonic-gate if (svc_getcallerucred(rqp->rq_xprt, &ucp) != 0 || 2507c478bd9Sstevel@tonic-gate (psp = ucred_getprivset(ucp, PRIV_EFFECTIVE)) == NULL) 2517c478bd9Sstevel@tonic-gate return (1); /* deny access if we can't get credentials */ 2527c478bd9Sstevel@tonic-gate 2537c478bd9Sstevel@tonic-gate #ifndef DEBUG 2547c478bd9Sstevel@tonic-gate /* 2557c478bd9Sstevel@tonic-gate * For convenience of testing, we only require all privileges for a 2567c478bd9Sstevel@tonic-gate * module load when running a non-DEBUG fault management daemon. 2577c478bd9Sstevel@tonic-gate */ 2587c478bd9Sstevel@tonic-gate if (rqp->rq_proc == FMD_ADM_MODLOAD) 2597c478bd9Sstevel@tonic-gate return (!priv_isfullset(psp)); 2607c478bd9Sstevel@tonic-gate #endif 2617c478bd9Sstevel@tonic-gate return (!priv_ismember(psp, PRIV_SYS_CONFIG)); 2627c478bd9Sstevel@tonic-gate } 263