19ec7b004SRick Macklem /*- 251369649SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 351369649SPedro F. Giffuni * 49ec7b004SRick Macklem * Copyright (c) 1989, 1993 59ec7b004SRick Macklem * The Regents of the University of California. All rights reserved. 69ec7b004SRick Macklem * 79ec7b004SRick Macklem * This code is derived from software contributed to Berkeley by 89ec7b004SRick Macklem * Rick Macklem at The University of Guelph. 99ec7b004SRick Macklem * 109ec7b004SRick Macklem * Redistribution and use in source and binary forms, with or without 119ec7b004SRick Macklem * modification, are permitted provided that the following conditions 129ec7b004SRick Macklem * are met: 139ec7b004SRick Macklem * 1. Redistributions of source code must retain the above copyright 149ec7b004SRick Macklem * notice, this list of conditions and the following disclaimer. 159ec7b004SRick Macklem * 2. Redistributions in binary form must reproduce the above copyright 169ec7b004SRick Macklem * notice, this list of conditions and the following disclaimer in the 179ec7b004SRick Macklem * documentation and/or other materials provided with the distribution. 18fbbd9655SWarner Losh * 3. Neither the name of the University nor the names of its contributors 199ec7b004SRick Macklem * may be used to endorse or promote products derived from this software 209ec7b004SRick Macklem * without specific prior written permission. 219ec7b004SRick Macklem * 229ec7b004SRick Macklem * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 239ec7b004SRick Macklem * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 249ec7b004SRick Macklem * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 259ec7b004SRick Macklem * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 269ec7b004SRick Macklem * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 279ec7b004SRick Macklem * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 289ec7b004SRick Macklem * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 299ec7b004SRick Macklem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 309ec7b004SRick Macklem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 319ec7b004SRick Macklem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 329ec7b004SRick Macklem * SUCH DAMAGE. 339ec7b004SRick Macklem * 349ec7b004SRick Macklem */ 359ec7b004SRick Macklem 369ec7b004SRick Macklem #include <sys/cdefs.h> 379ec7b004SRick Macklem __FBSDID("$FreeBSD$"); 389ec7b004SRick Macklem 399ec7b004SRick Macklem #include "opt_kgssapi.h" 40*6e4b6ff8SRick Macklem #include "opt_kern_tls.h" 419ec7b004SRick Macklem 429ec7b004SRick Macklem #include <fs/nfs/nfsport.h> 439ec7b004SRick Macklem 449ec7b004SRick Macklem #include <rpc/rpc.h> 459ec7b004SRick Macklem #include <rpc/replay.h> 46*6e4b6ff8SRick Macklem #include <rpc/rpcsec_gss.h> 47*6e4b6ff8SRick Macklem #include <rpc/rpcsec_tls.h> 489ec7b004SRick Macklem 499ec7b004SRick Macklem 509ec7b004SRick Macklem NFSDLOCKMUTEX; 519ec7b004SRick Macklem 521f60bfd8SRick Macklem extern SVCPOOL *nfscbd_pool; 539ec7b004SRick Macklem 549ec7b004SRick Macklem static int nfs_cbproc(struct nfsrv_descript *, u_int32_t); 559ec7b004SRick Macklem 569ec7b004SRick Macklem extern u_long sb_max_adj; 579ec7b004SRick Macklem extern int nfs_numnfscbd; 581f60bfd8SRick Macklem extern int nfscl_debuglevel; 599ec7b004SRick Macklem 609ec7b004SRick Macklem /* 619ec7b004SRick Macklem * NFS client system calls for handling callbacks. 629ec7b004SRick Macklem */ 639ec7b004SRick Macklem 649ec7b004SRick Macklem /* 659ec7b004SRick Macklem * Handles server to client callbacks. 669ec7b004SRick Macklem */ 679ec7b004SRick Macklem static void 689ec7b004SRick Macklem nfscb_program(struct svc_req *rqst, SVCXPRT *xprt) 699ec7b004SRick Macklem { 709ec7b004SRick Macklem struct nfsrv_descript nd; 7198ad4453SRick Macklem int cacherep, credflavor; 72*6e4b6ff8SRick Macklem #ifdef KERN_TLS 73*6e4b6ff8SRick Macklem u_int maxlen; 74*6e4b6ff8SRick Macklem #endif 759ec7b004SRick Macklem 769ec7b004SRick Macklem memset(&nd, 0, sizeof(nd)); 779ec7b004SRick Macklem if (rqst->rq_proc != NFSPROC_NULL && 789ec7b004SRick Macklem rqst->rq_proc != NFSV4PROC_CBCOMPOUND) { 799ec7b004SRick Macklem svcerr_noproc(rqst); 809ec7b004SRick Macklem svc_freereq(rqst); 819ec7b004SRick Macklem return; 829ec7b004SRick Macklem } 839ec7b004SRick Macklem nd.nd_procnum = rqst->rq_proc; 849ec7b004SRick Macklem nd.nd_flag = (ND_NFSCB | ND_NFSV4); 859ec7b004SRick Macklem 869ec7b004SRick Macklem /* 879ec7b004SRick Macklem * Note: we want rq_addr, not svc_getrpccaller for nd_nam2 - 889ec7b004SRick Macklem * NFS_SRVMAXDATA uses a NULL value for nd_nam2 to detect TCP 899ec7b004SRick Macklem * mounts. 909ec7b004SRick Macklem */ 919ec7b004SRick Macklem nd.nd_mrep = rqst->rq_args; 929ec7b004SRick Macklem rqst->rq_args = NULL; 93d96b98a3SKenneth D. Merry newnfs_realign(&nd.nd_mrep, M_WAITOK); 949ec7b004SRick Macklem nd.nd_md = nd.nd_mrep; 959ec7b004SRick Macklem nd.nd_dpos = mtod(nd.nd_md, caddr_t); 969ec7b004SRick Macklem nd.nd_nam = svc_getrpccaller(rqst); 979ec7b004SRick Macklem nd.nd_nam2 = rqst->rq_addr; 989ec7b004SRick Macklem nd.nd_mreq = NULL; 999ec7b004SRick Macklem nd.nd_cred = NULL; 1009ec7b004SRick Macklem 1011f60bfd8SRick Macklem NFSCL_DEBUG(1, "cbproc=%d\n",nd.nd_procnum); 1029ec7b004SRick Macklem if (nd.nd_procnum != NFSPROC_NULL) { 10398ad4453SRick Macklem if (!svc_getcred(rqst, &nd.nd_cred, &credflavor)) { 1049ec7b004SRick Macklem svcerr_weakauth(rqst); 1059ec7b004SRick Macklem svc_freereq(rqst); 1069ec7b004SRick Macklem m_freem(nd.nd_mrep); 1079ec7b004SRick Macklem return; 1089ec7b004SRick Macklem } 10998ad4453SRick Macklem 11098ad4453SRick Macklem /* For now, I don't care what credential flavor was used. */ 1119ec7b004SRick Macklem #ifdef notyet 1129ec7b004SRick Macklem #ifdef MAC 1139ec7b004SRick Macklem mac_cred_associate_nfsd(nd.nd_cred); 1149ec7b004SRick Macklem #endif 1159ec7b004SRick Macklem #endif 116*6e4b6ff8SRick Macklem #ifdef KERN_TLS 117*6e4b6ff8SRick Macklem if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0 && 118*6e4b6ff8SRick Macklem rpctls_getinfo(&maxlen, false, false)) { 119*6e4b6ff8SRick Macklem nd.nd_flag |= ND_EXTPG; 120*6e4b6ff8SRick Macklem nd.nd_maxextsiz = maxlen; 121*6e4b6ff8SRick Macklem } 122*6e4b6ff8SRick Macklem #endif 1239ec7b004SRick Macklem cacherep = nfs_cbproc(&nd, rqst->rq_xid); 1249ec7b004SRick Macklem } else { 1259ec7b004SRick Macklem NFSMGET(nd.nd_mreq); 1269ec7b004SRick Macklem nd.nd_mreq->m_len = 0; 1279ec7b004SRick Macklem cacherep = RC_REPLY; 1289ec7b004SRick Macklem } 1299ec7b004SRick Macklem if (nd.nd_mrep != NULL) 1309ec7b004SRick Macklem m_freem(nd.nd_mrep); 1319ec7b004SRick Macklem 1329ec7b004SRick Macklem if (nd.nd_cred != NULL) 1339ec7b004SRick Macklem crfree(nd.nd_cred); 1349ec7b004SRick Macklem 1359ec7b004SRick Macklem if (cacherep == RC_DROPIT) { 1369ec7b004SRick Macklem if (nd.nd_mreq != NULL) 1379ec7b004SRick Macklem m_freem(nd.nd_mreq); 1389ec7b004SRick Macklem svc_freereq(rqst); 1399ec7b004SRick Macklem return; 1409ec7b004SRick Macklem } 1419ec7b004SRick Macklem 1429ec7b004SRick Macklem if (nd.nd_mreq == NULL) { 1439ec7b004SRick Macklem svcerr_decode(rqst); 1449ec7b004SRick Macklem svc_freereq(rqst); 1459ec7b004SRick Macklem return; 1469ec7b004SRick Macklem } 1479ec7b004SRick Macklem 1489ec7b004SRick Macklem if (nd.nd_repstat & NFSERR_AUTHERR) { 1499ec7b004SRick Macklem svcerr_auth(rqst, nd.nd_repstat & ~NFSERR_AUTHERR); 1509ec7b004SRick Macklem if (nd.nd_mreq != NULL) 1519ec7b004SRick Macklem m_freem(nd.nd_mreq); 1521f60bfd8SRick Macklem } else if (!svc_sendreply_mbuf(rqst, nd.nd_mreq)) 1539ec7b004SRick Macklem svcerr_systemerr(rqst); 1541f60bfd8SRick Macklem else 1551f60bfd8SRick Macklem NFSCL_DEBUG(1, "cbrep sent\n"); 1569ec7b004SRick Macklem svc_freereq(rqst); 1579ec7b004SRick Macklem } 1589ec7b004SRick Macklem 1599ec7b004SRick Macklem /* 1609ec7b004SRick Macklem * Check the cache and, optionally, do the RPC. 1619ec7b004SRick Macklem * Return the appropriate cache response. 1629ec7b004SRick Macklem */ 1639ec7b004SRick Macklem static int 1649ec7b004SRick Macklem nfs_cbproc(struct nfsrv_descript *nd, u_int32_t xid) 1659ec7b004SRick Macklem { 1669ec7b004SRick Macklem struct thread *td = curthread; 1679ec7b004SRick Macklem int cacherep; 1689ec7b004SRick Macklem 1699ec7b004SRick Macklem if (nd->nd_nam2 == NULL) 1709ec7b004SRick Macklem nd->nd_flag |= ND_STREAMSOCK; 1719ec7b004SRick Macklem 1729ec7b004SRick Macklem nfscl_docb(nd, td); 1739ec7b004SRick Macklem if (nd->nd_repstat == NFSERR_DONTREPLY) 1749ec7b004SRick Macklem cacherep = RC_DROPIT; 1759ec7b004SRick Macklem else 1769ec7b004SRick Macklem cacherep = RC_REPLY; 1779ec7b004SRick Macklem return (cacherep); 1789ec7b004SRick Macklem } 1799ec7b004SRick Macklem 1809ec7b004SRick Macklem /* 1819ec7b004SRick Macklem * Adds a socket to the list for servicing by nfscbds. 1829ec7b004SRick Macklem */ 1839ec7b004SRick Macklem int 1849ec7b004SRick Macklem nfscbd_addsock(struct file *fp) 1859ec7b004SRick Macklem { 1869ec7b004SRick Macklem int siz; 1879ec7b004SRick Macklem struct socket *so; 1889ec7b004SRick Macklem int error; 1899ec7b004SRick Macklem SVCXPRT *xprt; 1909ec7b004SRick Macklem 1919ec7b004SRick Macklem so = fp->f_data; 1929ec7b004SRick Macklem 1939ec7b004SRick Macklem siz = sb_max_adj; 1949ec7b004SRick Macklem error = soreserve(so, siz, siz); 1959ec7b004SRick Macklem if (error) 1969ec7b004SRick Macklem return (error); 1979ec7b004SRick Macklem 1989ec7b004SRick Macklem /* 1999ec7b004SRick Macklem * Steal the socket from userland so that it doesn't close 2009ec7b004SRick Macklem * unexpectedly. 2019ec7b004SRick Macklem */ 2029ec7b004SRick Macklem if (so->so_type == SOCK_DGRAM) 2039ec7b004SRick Macklem xprt = svc_dg_create(nfscbd_pool, so, 0, 0); 2049ec7b004SRick Macklem else 2059ec7b004SRick Macklem xprt = svc_vc_create(nfscbd_pool, so, 0, 0); 2069ec7b004SRick Macklem if (xprt) { 2079ec7b004SRick Macklem fp->f_ops = &badfileops; 2089ec7b004SRick Macklem fp->f_data = NULL; 2099ec7b004SRick Macklem svc_reg(xprt, NFS_CALLBCKPROG, NFSV4_CBVERS, nfscb_program, 2109ec7b004SRick Macklem NULL); 21176b30a0cSRick Macklem SVC_RELEASE(xprt); 2129ec7b004SRick Macklem } 2139ec7b004SRick Macklem 2149ec7b004SRick Macklem return (0); 2159ec7b004SRick Macklem } 2169ec7b004SRick Macklem 2179ec7b004SRick Macklem /* 2189ec7b004SRick Macklem * Called by nfssvc() for nfscbds. Just loops around servicing rpc requests 2199ec7b004SRick Macklem * until it is killed by a signal. 2209ec7b004SRick Macklem * 2219ec7b004SRick Macklem * For now, only support callbacks via RPCSEC_GSS if there is a KerberosV 2229ec7b004SRick Macklem * keytab entry with a host based entry in it on the client. (I'm not even 2239ec7b004SRick Macklem * sure that getting Acceptor credentials for a user principal with a 2249ec7b004SRick Macklem * credentials cache is possible, but even if it is, major changes to the 2259ec7b004SRick Macklem * kgssapi would be required.) 2269ec7b004SRick Macklem * I don't believe that this is a serious limitation since, as of 2009, most 2279ec7b004SRick Macklem * NFSv4 servers supporting callbacks are using AUTH_SYS for callbacks even 2289ec7b004SRick Macklem * when the client is using RPCSEC_GSS. (This BSD server uses AUTH_SYS 2299ec7b004SRick Macklem * for callbacks unless nfsrv_gsscallbackson is set non-zero.) 2309ec7b004SRick Macklem */ 2319ec7b004SRick Macklem int 2329ec7b004SRick Macklem nfscbd_nfsd(struct thread *td, struct nfsd_nfscbd_args *args) 2339ec7b004SRick Macklem { 2349ec7b004SRick Macklem char principal[128]; 2359ec7b004SRick Macklem int error; 2369ec7b004SRick Macklem 2379ec7b004SRick Macklem if (args != NULL) { 2389ec7b004SRick Macklem error = copyinstr(args->principal, principal, 2399ec7b004SRick Macklem sizeof(principal), NULL); 2409ec7b004SRick Macklem if (error) 2419ec7b004SRick Macklem return (error); 2429ec7b004SRick Macklem } else { 2439ec7b004SRick Macklem principal[0] = '\0'; 2449ec7b004SRick Macklem } 2459ec7b004SRick Macklem 2469ec7b004SRick Macklem /* 2479ec7b004SRick Macklem * Only the first nfsd actually does any work. The RPC code 2489ec7b004SRick Macklem * adds threads to it as needed. Any extra processes offered 2499ec7b004SRick Macklem * by nfsd just exit. If nfsd is new enough, it will call us 2509ec7b004SRick Macklem * once with a structure that specifies how many threads to 2519ec7b004SRick Macklem * use. 2529ec7b004SRick Macklem */ 2539ec7b004SRick Macklem NFSD_LOCK(); 2549ec7b004SRick Macklem if (nfs_numnfscbd == 0) { 2559ec7b004SRick Macklem nfs_numnfscbd++; 2569ec7b004SRick Macklem 2579ec7b004SRick Macklem NFSD_UNLOCK(); 2589ec7b004SRick Macklem 2599ec7b004SRick Macklem if (principal[0] != '\0') 2607e7fd7d1SRick Macklem rpc_gss_set_svc_name_call(principal, "kerberosv5", 2619ec7b004SRick Macklem GSS_C_INDEFINITE, NFS_CALLBCKPROG, NFSV4_CBVERS); 2629ec7b004SRick Macklem 2639ec7b004SRick Macklem nfscbd_pool->sp_minthreads = 4; 2649ec7b004SRick Macklem nfscbd_pool->sp_maxthreads = 4; 2659ec7b004SRick Macklem 2669ec7b004SRick Macklem svc_run(nfscbd_pool); 2679ec7b004SRick Macklem 2687e7fd7d1SRick Macklem rpc_gss_clear_svc_name_call(NFS_CALLBCKPROG, NFSV4_CBVERS); 2699ec7b004SRick Macklem 2709ec7b004SRick Macklem NFSD_LOCK(); 2719ec7b004SRick Macklem nfs_numnfscbd--; 2729ec7b004SRick Macklem nfsrvd_cbinit(1); 2739ec7b004SRick Macklem } 2749ec7b004SRick Macklem NFSD_UNLOCK(); 2759ec7b004SRick Macklem 2769ec7b004SRick Macklem return (0); 2779ec7b004SRick Macklem } 2789ec7b004SRick Macklem 2799ec7b004SRick Macklem /* 2809ec7b004SRick Macklem * Initialize the data structures for the server. 2819ec7b004SRick Macklem * Handshake with any new nfsds starting up to avoid any chance of 2829ec7b004SRick Macklem * corruption. 2839ec7b004SRick Macklem */ 2849ec7b004SRick Macklem void 2859ec7b004SRick Macklem nfsrvd_cbinit(int terminating) 2869ec7b004SRick Macklem { 2879ec7b004SRick Macklem 2889ec7b004SRick Macklem NFSD_LOCK_ASSERT(); 2899ec7b004SRick Macklem 2909ec7b004SRick Macklem if (terminating) { 2911f60bfd8SRick Macklem /* Wait for any xprt registrations to complete. */ 2921f60bfd8SRick Macklem while (nfs_numnfscbd > 0) 2931f60bfd8SRick Macklem msleep(&nfs_numnfscbd, NFSDLOCKMUTEXPTR, PZERO, 2941f60bfd8SRick Macklem "nfscbdt", 0); 29560287c0cSRick Macklem if (nfscbd_pool != NULL) { 29660287c0cSRick Macklem NFSD_UNLOCK(); 29760287c0cSRick Macklem svcpool_close(nfscbd_pool); 29860287c0cSRick Macklem NFSD_LOCK(); 29960287c0cSRick Macklem } 300f7d8291aSRick Macklem } 3019ec7b004SRick Macklem 302f7d8291aSRick Macklem if (nfscbd_pool == NULL) { 303f7d8291aSRick Macklem NFSD_UNLOCK(); 304b66124f3SRick Macklem nfscbd_pool = svcpool_create("nfscbd", NULL); 3059ec7b004SRick Macklem nfscbd_pool->sp_rcache = NULL; 3069ec7b004SRick Macklem nfscbd_pool->sp_assign = NULL; 3079ec7b004SRick Macklem nfscbd_pool->sp_done = NULL; 3089ec7b004SRick Macklem NFSD_LOCK(); 3099ec7b004SRick Macklem } 310f7d8291aSRick Macklem } 3119ec7b004SRick Macklem 312