/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. */ #include <sys/types.h> #include <sys/fm/util.h> #include <netdir.h> #include <strings.h> #include <alloca.h> #include <limits.h> #include <unistd.h> #include <ucred.h> #include <priv.h> #include <fmd_rpc_api.h> #include <fmd_rpc_adm.h> #include <rpc/svc_mt.h> #include <fmd_subr.h> #include <fmd_error.h> #include <fmd_thread.h> #include <fmd_conf.h> #include <fmd_api.h> #include <fmd.h> /* * Define range of transient RPC program numbers to use for transient bindings. * These are defined in the Solaris ONC+ Developer's Guide, Appendix B, but * are cleverly not defined in any ONC+ standard system header file. */ #define RPC_TRANS_MIN 0x40000000 #define RPC_TRANS_MAX 0x5fffffff /* * We use our own private version of svc_create() which registers our services * only on loopback transports and enables an option whereby Solaris ucreds * are associated with each connection, permitting us to check privilege bits. */ static int fmd_rpc_svc_create_local(void (*disp)(struct svc_req *, SVCXPRT *), rpcprog_t prog, rpcvers_t vers, uint_t ssz, uint_t rsz, int force) { struct netconfig *ncp; struct netbuf buf; SVCXPRT *xprt; void *hdl; int fd, n = 0; char door[PATH_MAX]; time_t tm; if ((hdl = setnetconfig()) == NULL) { fmd_error(EFMD_RPC_REG, "failed to iterate over " "netconfig database: %s\n", nc_sperror()); return (fmd_set_errno(EFMD_RPC_REG)); } if (force) svc_unreg(prog, vers); /* clear stale rpcbind registrations */ buf.buf = alloca(_SS_MAXSIZE); buf.maxlen = _SS_MAXSIZE; buf.len = 0; while ((ncp = getnetconfig(hdl)) != NULL) { if (strcmp(ncp->nc_protofmly, NC_LOOPBACK) != 0) continue; if (!force && rpcb_getaddr(prog, vers, ncp, &buf, HOST_SELF)) { (void) endnetconfig(hdl); return (fmd_set_errno(EFMD_RPC_BOUND)); } if ((fd = t_open(ncp->nc_device, O_RDWR, NULL)) == -1) { fmd_error(EFMD_RPC_REG, "failed to open %s: %s\n", ncp->nc_device, t_strerror(t_errno)); continue; } svc_fd_negotiate_ucred(fd); /* enable ucred option on xprt */ if ((xprt = svc_tli_create(fd, ncp, NULL, ssz, rsz)) == NULL) { (void) t_close(fd); continue; } if (svc_reg(xprt, prog, vers, disp, ncp) == FALSE) { fmd_error(EFMD_RPC_REG, "failed to register " "rpc service on %s\n", ncp->nc_netid); svc_destroy(xprt); continue; } n++; } (void) endnetconfig(hdl); /* * If we failed to register services (n == 0) because rpcbind is down, * then check to see if the RPC door file exists before attempting an * svc_door_create(), which cleverly destroys any existing door file. * The RPC APIs have no stable errnos, so we use rpcb_gettime() as a * hack to determine if rpcbind itself is down. */ if (!force && n == 0 && rpcb_gettime(HOST_SELF, &tm) == FALSE && snprintf(door, sizeof (door), RPC_DOOR_RENDEZVOUS, prog, vers) > 0 && access(door, F_OK) == 0) return (fmd_set_errno(EFMD_RPC_BOUND)); /* * Attempt to create a door server for the RPC program as well. Limit * the maximum request size for the door transport to the receive size. */ if ((xprt = svc_door_create(disp, prog, vers, ssz)) == NULL) { fmd_error(EFMD_RPC_REG, "failed to create door for " "rpc service 0x%lx/0x%lx\n", prog, vers); } else { (void) svc_control(xprt, SVCSET_CONNMAXREC, &rsz); n++; } return (n); } static int fmd_rpc_svc_init(void (*disp)(struct svc_req *, SVCXPRT *), const char *name, const char *path, const char *prop, rpcprog_t pmin, rpcprog_t pmax, rpcvers_t vers, uint_t sndsize, uint_t rcvsize, int force) { rpcprog_t prog; char buf[16]; FILE *fp; for (prog = pmin; prog <= pmax; prog++) { if (fmd_rpc_svc_create_local(disp, prog, vers, sndsize, rcvsize, force) > 0) { fmd_dprintf(FMD_DBG_RPC, "registered %s rpc service " "as 0x%lx.%lx\n", name, prog, vers); /* * To aid simulator scripts, save our RPC "digits" in * the specified file for rendezvous with libfmd_adm. */ if (path != NULL && (fp = fopen(path, "w")) != NULL) { (void) fprintf(fp, "%ld\n", prog); (void) fclose(fp); } (void) snprintf(buf, sizeof (buf), "%ld", prog); (void) fmd_conf_setprop(fmd.d_conf, prop, buf); return (0); } } return (-1); /* errno is set for us */ } void fmd_rpc_init(void) { int err, prog, mode = RPC_SVC_MT_USER; uint64_t sndsize = 0, rcvsize = 0; const char *s; if (rpc_control(RPC_SVC_MTMODE_SET, &mode) == FALSE) fmd_panic("failed to enable user-MT rpc mode"); (void) fmd_conf_getprop(fmd.d_conf, "rpc.sndsize", &sndsize); (void) fmd_conf_getprop(fmd.d_conf, "rpc.rcvsize", &rcvsize); /* * Infer whether we are the "default" fault manager or an alternate one * based on whether the initial setting of rpc.adm.prog is non-zero. */ (void) fmd_conf_getprop(fmd.d_conf, "rpc.adm.prog", &prog); (void) fmd_conf_getprop(fmd.d_conf, "rpc.adm.path", &s); if (prog != 0) { err = fmd_rpc_svc_init(fmd_adm_1, "FMD_ADM", s, "rpc.adm.prog", FMD_ADM, FMD_ADM, FMD_ADM_VERSION_1, (uint_t)sndsize, (uint_t)rcvsize, TRUE); } else { err = fmd_rpc_svc_init(fmd_adm_1, "FMD_ADM", s, "rpc.adm.prog", RPC_TRANS_MIN, RPC_TRANS_MAX, FMD_ADM_VERSION_1, (uint_t)sndsize, (uint_t)rcvsize, FALSE); } if (err != 0) fmd_error(EFMD_EXIT, "failed to create rpc server bindings"); if (fmd_thread_create(fmd.d_rmod, (fmd_thread_f *)svc_run, 0) == NULL) fmd_error(EFMD_EXIT, "failed to create rpc server thread"); } void fmd_rpc_fini(void) { rpcprog_t prog; svc_exit(); /* force svc_run() threads to exit */ (void) fmd_conf_getprop(fmd.d_conf, "rpc.adm.prog", &prog); svc_unreg(prog, FMD_ADM_VERSION_1); (void) fmd_conf_getprop(fmd.d_conf, "rpc.api.prog", &prog); svc_unreg(prog, FMD_API_VERSION_1); } /* * Utillity function to fetch the XPRT's ucred and determine if we should deny * the request. For now, we implement a simple policy of rejecting any caller * who does not have the PRIV_SYS_ADMIN bit in their Effective privilege set, * unless the caller is loading a module, which requires all privileges. */ int fmd_rpc_deny(struct svc_req *rqp) { ucred_t *ucp = alloca(ucred_size()); const priv_set_t *psp; if (!fmd.d_booted) { (void) pthread_mutex_lock(&fmd.d_fmd_lock); while (!fmd.d_booted) (void) pthread_cond_wait(&fmd.d_fmd_cv, &fmd.d_fmd_lock); (void) pthread_mutex_unlock(&fmd.d_fmd_lock); } if (svc_getcallerucred(rqp->rq_xprt, &ucp) != 0 || (psp = ucred_getprivset(ucp, PRIV_EFFECTIVE)) == NULL) return (1); /* deny access if we can't get credentials */ #ifndef DEBUG /* * For convenience of testing, we only require all privileges for a * module load when running a non-DEBUG fault management daemon. */ if (rqp->rq_proc == FMD_ADM_MODLOAD) return (!priv_isfullset(psp)); #endif return (!priv_ismember(psp, PRIV_SYS_ADMIN)); }