1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include "opt_inet6.h" 40 #include "opt_kgssapi.h" 41 #include "opt_kern_tls.h" 42 43 #include <fs/nfs/nfsport.h> 44 45 #include <rpc/rpc.h> 46 #include <rpc/rpcsec_gss.h> 47 #include <rpc/rpcsec_tls.h> 48 49 #include <fs/nfsserver/nfs_fha_new.h> 50 51 #include <security/mac/mac_framework.h> 52 53 NFSDLOCKMUTEX; 54 NFSV4ROOTLOCKMUTEX; 55 char *nfsrv_zeropnfsdat = NULL; 56 57 /* 58 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 59 */ 60 int newnfs_nfsv3_procid[NFS_V3NPROCS] = { 61 NFSPROC_NULL, 62 NFSPROC_GETATTR, 63 NFSPROC_SETATTR, 64 NFSPROC_NOOP, 65 NFSPROC_LOOKUP, 66 NFSPROC_READLINK, 67 NFSPROC_READ, 68 NFSPROC_NOOP, 69 NFSPROC_WRITE, 70 NFSPROC_CREATE, 71 NFSPROC_REMOVE, 72 NFSPROC_RENAME, 73 NFSPROC_LINK, 74 NFSPROC_SYMLINK, 75 NFSPROC_MKDIR, 76 NFSPROC_RMDIR, 77 NFSPROC_READDIR, 78 NFSPROC_FSSTAT, 79 NFSPROC_NOOP, 80 NFSPROC_NOOP, 81 NFSPROC_NOOP, 82 NFSPROC_NOOP, 83 }; 84 85 SYSCTL_DECL(_vfs_nfsd); 86 87 NFSD_VNET_DEFINE_STATIC(int, nfs_privport) = 0; 88 SYSCTL_INT(_vfs_nfsd, OID_AUTO, nfs_privport, CTLFLAG_NFSD_VNET | CTLFLAG_RWTUN, 89 &NFSD_VNET_NAME(nfs_privport), 0, 90 "Only allow clients using a privileged port for NFSv2, 3 and 4"); 91 92 NFSD_VNET_DEFINE_STATIC(int, nfs_minvers) = NFS_VER2; 93 SYSCTL_INT(_vfs_nfsd, OID_AUTO, server_min_nfsvers, 94 CTLFLAG_NFSD_VNET | CTLFLAG_RWTUN, &NFSD_VNET_NAME(nfs_minvers), 0, 95 "The lowest version of NFS handled by the server"); 96 97 NFSD_VNET_DEFINE_STATIC(int, nfs_maxvers) = NFS_VER4; 98 SYSCTL_INT(_vfs_nfsd, OID_AUTO, server_max_nfsvers, 99 CTLFLAG_NFSD_VNET | CTLFLAG_RWTUN, &NFSD_VNET_NAME(nfs_maxvers), 0, 100 "The highest version of NFS handled by the server"); 101 102 static int nfs_proc(struct nfsrv_descript *, u_int32_t, SVCXPRT *xprt, 103 struct nfsrvcache **); 104 105 extern u_long sb_max_adj; 106 extern int newnfs_numnfsd; 107 extern time_t nfsdev_time; 108 extern int nfsrv_writerpc[NFS_NPROCS]; 109 extern volatile int nfsrv_devidcnt; 110 extern struct nfsv4_opflag nfsv4_opflag[NFSV42_NOPS]; 111 extern int nfsd_debuglevel; 112 113 NFSD_VNET_DECLARE(struct proc *, nfsd_master_proc); 114 115 NFSD_VNET_DEFINE(SVCPOOL *, nfsrvd_pool); 116 NFSD_VNET_DEFINE(int, nfsrv_numnfsd) = 0; 117 NFSD_VNET_DEFINE(struct nfsv4lock, nfsd_suspend_lock); 118 119 NFSD_VNET_DEFINE_STATIC(bool, nfsrvd_inited) = false; 120 121 /* 122 * NFS server system calls 123 */ 124 125 static void 126 nfssvc_program(struct svc_req *rqst, SVCXPRT *xprt) 127 { 128 struct nfsrv_descript nd; 129 struct nfsrvcache *rp = NULL; 130 rpc_gss_rawcred_t *rcredp; 131 int cacherep, credflavor, i, j; 132 u_char *p; 133 #ifdef KERN_TLS 134 u_int maxlen; 135 #endif 136 137 NFSD_CURVNET_SET_QUIET(NFSD_TD_TO_VNET(curthread)); 138 memset(&nd, 0, sizeof(nd)); 139 if (rqst->rq_vers == NFS_VER2) { 140 if (rqst->rq_proc > NFSV2PROC_STATFS || 141 newnfs_nfsv3_procid[rqst->rq_proc] == NFSPROC_NOOP) { 142 svcerr_noproc(rqst); 143 svc_freereq(rqst); 144 goto out; 145 } 146 nd.nd_procnum = newnfs_nfsv3_procid[rqst->rq_proc]; 147 nd.nd_flag = ND_NFSV2; 148 } else if (rqst->rq_vers == NFS_VER3) { 149 if (rqst->rq_proc >= NFS_V3NPROCS) { 150 svcerr_noproc(rqst); 151 svc_freereq(rqst); 152 goto out; 153 } 154 nd.nd_procnum = rqst->rq_proc; 155 nd.nd_flag = ND_NFSV3; 156 } else { 157 if (rqst->rq_proc != NFSPROC_NULL && 158 rqst->rq_proc != NFSV4PROC_COMPOUND) { 159 svcerr_noproc(rqst); 160 svc_freereq(rqst); 161 goto out; 162 } 163 nd.nd_procnum = rqst->rq_proc; 164 nd.nd_flag = ND_NFSV4; 165 } 166 167 /* 168 * Note: we want rq_addr, not svc_getrpccaller for nd_nam2 - 169 * NFS_SRVMAXDATA uses a NULL value for nd_nam2 to detect TCP 170 * mounts. 171 */ 172 nd.nd_mrep = rqst->rq_args; 173 rqst->rq_args = NULL; 174 newnfs_realign(&nd.nd_mrep, M_WAITOK); 175 nd.nd_md = nd.nd_mrep; 176 nd.nd_dpos = mtod(nd.nd_md, caddr_t); 177 nd.nd_nam = svc_getrpccaller(rqst); 178 nd.nd_nam2 = rqst->rq_addr; 179 nd.nd_mreq = NULL; 180 nd.nd_cred = NULL; 181 182 if (NFSD_VNET(nfs_privport) != 0) { 183 /* Check if source port is privileged */ 184 u_short port; 185 struct sockaddr *nam = nd.nd_nam; 186 struct sockaddr_in *sin; 187 188 sin = (struct sockaddr_in *)nam; 189 /* 190 * INET/INET6 - same code: 191 * sin_port and sin6_port are at same offset 192 */ 193 port = ntohs(sin->sin_port); 194 if (port >= IPPORT_RESERVED && 195 nd.nd_procnum != NFSPROC_NULL) { 196 #ifdef INET6 197 char buf[INET6_ADDRSTRLEN]; 198 #else 199 char buf[INET_ADDRSTRLEN]; 200 #endif 201 #ifdef INET6 202 #if defined(KLD_MODULE) 203 /* Do not use ip6_sprintf: the nfs module should work without INET6. */ 204 #define ip6_sprintf(buf, a) \ 205 (sprintf((buf), "%x:%x:%x:%x:%x:%x:%x:%x", \ 206 (a)->s6_addr16[0], (a)->s6_addr16[1], \ 207 (a)->s6_addr16[2], (a)->s6_addr16[3], \ 208 (a)->s6_addr16[4], (a)->s6_addr16[5], \ 209 (a)->s6_addr16[6], (a)->s6_addr16[7]), \ 210 (buf)) 211 #endif 212 #endif 213 printf("NFS request from unprivileged port (%s:%d)\n", 214 #ifdef INET6 215 sin->sin_family == AF_INET6 ? 216 ip6_sprintf(buf, &satosin6(sin)->sin6_addr) : 217 #if defined(KLD_MODULE) 218 #undef ip6_sprintf 219 #endif 220 #endif 221 inet_ntoa_r(sin->sin_addr, buf), port); 222 svcerr_weakauth(rqst); 223 svc_freereq(rqst); 224 m_freem(nd.nd_mrep); 225 goto out; 226 } 227 } 228 229 if (nd.nd_procnum != NFSPROC_NULL) { 230 if (!svc_getcred(rqst, &nd.nd_cred, &credflavor)) { 231 svcerr_weakauth(rqst); 232 svc_freereq(rqst); 233 m_freem(nd.nd_mrep); 234 goto out; 235 } 236 237 /* Set the flag based on credflavor */ 238 if (credflavor == RPCSEC_GSS_KRB5) { 239 nd.nd_flag |= ND_GSS; 240 } else if (credflavor == RPCSEC_GSS_KRB5I) { 241 nd.nd_flag |= (ND_GSS | ND_GSSINTEGRITY); 242 } else if (credflavor == RPCSEC_GSS_KRB5P) { 243 nd.nd_flag |= (ND_GSS | ND_GSSPRIVACY); 244 } else if (credflavor != AUTH_SYS) { 245 svcerr_weakauth(rqst); 246 svc_freereq(rqst); 247 m_freem(nd.nd_mrep); 248 goto out; 249 } 250 251 /* Acquire the principal name for the RPCSEC_GSS cases. */ 252 if ((nd.nd_flag & (ND_NFSV4 | ND_GSS)) == (ND_NFSV4 | ND_GSS)) { 253 rcredp = NULL; 254 rpc_gss_getcred_call(rqst, &rcredp, NULL, NULL); 255 /* 256 * The exported principal name consists of: 257 * - TOK_ID bytes with value of 4 and 1. 258 * - 2 byte mech length 259 * - mech 260 * - 4 byte principal name length 261 * - principal name 262 * A call to gss_import_name() would be an 263 * upcall to the gssd, so parse it here. 264 * See lib/libgssapi/gss_import_name.c for the 265 * above format. 266 */ 267 if (rcredp != NULL && 268 rcredp->client_principal->len > 4 && 269 rcredp->client_principal->name[0] == 4 && 270 rcredp->client_principal->name[1] == 1) { 271 /* Skip over the mech. */ 272 p = &rcredp->client_principal->name[2]; 273 i = (p[0] << 8) | p[1]; 274 p += i + 2; 275 i += 4; 276 /* 277 * Set "j" to a bogus length so that the 278 * "i + j" check will fail unless the below 279 * code sets "j" correctly. 280 */ 281 j = rcredp->client_principal->len; 282 if (rcredp->client_principal->len > i + 4) { 283 j = (p[0] << 24) | (p[1] << 16) | 284 (p[2] << 8) | p[3]; 285 i += 4; 286 p += 4; 287 } 288 if (i + j == rcredp->client_principal->len) { 289 nd.nd_principal = malloc(j + 1, M_TEMP, 290 M_WAITOK); 291 nd.nd_princlen = j; 292 memcpy(nd.nd_principal, p, j); 293 nd.nd_principal[j] = '\0'; 294 NFSD_DEBUG(1, "nfssvc_program: " 295 "principal=%s\n", nd.nd_principal); 296 } 297 } 298 if (nd.nd_princlen == 0) 299 printf("nfssvc_program: cannot get RPCSEC_GSS " 300 "principal name\n"); 301 } 302 303 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0) { 304 nd.nd_flag |= ND_TLS; 305 if ((xprt->xp_tls & RPCTLS_FLAGS_VERIFIED) != 0) 306 nd.nd_flag |= ND_TLSCERT; 307 if ((xprt->xp_tls & RPCTLS_FLAGS_CERTUSER) != 0) 308 nd.nd_flag |= ND_TLSCERTUSER; 309 } 310 nd.nd_maxextsiz = 16384; 311 #ifdef MAC 312 mac_cred_associate_nfsd(nd.nd_cred); 313 #endif 314 /* 315 * Get a refcnt (shared lock) on nfsd_suspend_lock. 316 * NFSSVC_SUSPENDNFSD will take an exclusive lock on 317 * nfsd_suspend_lock to suspend these threads. 318 * The call to nfsv4_lock() that precedes nfsv4_getref() 319 * ensures that the acquisition of the exclusive lock 320 * takes priority over acquisition of the shared lock by 321 * waiting for any exclusive lock request to complete. 322 * This must be done here, before the check of 323 * nfsv4root exports by nfsvno_v4rootexport(). 324 */ 325 NFSLOCKV4ROOTMUTEX(); 326 nfsv4_lock(&NFSD_VNET(nfsd_suspend_lock), 0, NULL, 327 NFSV4ROOTLOCKMUTEXPTR, NULL); 328 nfsv4_getref(&NFSD_VNET(nfsd_suspend_lock), NULL, 329 NFSV4ROOTLOCKMUTEXPTR, NULL); 330 NFSUNLOCKV4ROOTMUTEX(); 331 332 if ((nd.nd_flag & ND_NFSV4) != 0) { 333 nd.nd_repstat = nfsvno_v4rootexport(&nd); 334 if (nd.nd_repstat != 0) { 335 NFSLOCKV4ROOTMUTEX(); 336 nfsv4_relref(&NFSD_VNET(nfsd_suspend_lock)); 337 NFSUNLOCKV4ROOTMUTEX(); 338 svcerr_weakauth(rqst); 339 svc_freereq(rqst); 340 m_freem(nd.nd_mrep); 341 goto out; 342 } 343 } 344 345 #ifdef KERN_TLS 346 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0 && 347 rpctls_getinfo(&maxlen, false, false)) 348 nd.nd_maxextsiz = maxlen; 349 #endif 350 cacherep = nfs_proc(&nd, rqst->rq_xid, xprt, &rp); 351 NFSLOCKV4ROOTMUTEX(); 352 nfsv4_relref(&NFSD_VNET(nfsd_suspend_lock)); 353 NFSUNLOCKV4ROOTMUTEX(); 354 } else { 355 NFSMGET(nd.nd_mreq); 356 nd.nd_mreq->m_len = 0; 357 cacherep = RC_REPLY; 358 } 359 if (nd.nd_mrep != NULL) 360 m_freem(nd.nd_mrep); 361 362 if (nd.nd_cred != NULL) 363 crfree(nd.nd_cred); 364 365 if (cacherep == RC_DROPIT) { 366 if (nd.nd_mreq != NULL) 367 m_freem(nd.nd_mreq); 368 svc_freereq(rqst); 369 goto out; 370 } 371 372 if (nd.nd_mreq == NULL) { 373 svcerr_decode(rqst); 374 svc_freereq(rqst); 375 goto out; 376 } 377 378 if (nd.nd_repstat & NFSERR_AUTHERR) { 379 svcerr_auth(rqst, nd.nd_repstat & ~NFSERR_AUTHERR); 380 if (nd.nd_mreq != NULL) 381 m_freem(nd.nd_mreq); 382 } else if (!svc_sendreply_mbuf(rqst, nd.nd_mreq)) { 383 svcerr_systemerr(rqst); 384 } 385 if (rp != NULL) { 386 nfsrvd_sentcache(rp, (rqst->rq_reply_seq != 0 || 387 SVC_ACK(xprt, NULL)), rqst->rq_reply_seq); 388 } 389 svc_freereq(rqst); 390 391 out: 392 free(nd.nd_principal, M_TEMP); 393 NFSD_CURVNET_RESTORE(); 394 ast_kclear(curthread); 395 NFSEXITCODE(0); 396 } 397 398 /* 399 * Check the cache and, optionally, do the RPC. 400 * Return the appropriate cache response. 401 */ 402 static int 403 nfs_proc(struct nfsrv_descript *nd, u_int32_t xid, SVCXPRT *xprt, 404 struct nfsrvcache **rpp) 405 { 406 int cacherep = RC_DOIT, isdgram, taglen = -1; 407 struct mbuf *m; 408 u_char tag[NFSV4_SMALLSTR + 1], *tagstr = NULL; 409 u_int32_t minorvers = 0; 410 uint32_t ack; 411 412 *rpp = NULL; 413 if (nd->nd_nam2 == NULL) { 414 nd->nd_flag |= ND_STREAMSOCK; 415 isdgram = 0; 416 } else { 417 isdgram = 1; 418 } 419 420 /* 421 * Two cases: 422 * 1 - For NFSv2 over UDP, if we are near our malloc/mget 423 * limit, just drop the request. There is no 424 * NFSERR_RESOURCE or NFSERR_DELAY for NFSv2 and the 425 * client will timeout/retry over UDP in a little while. 426 * 2 - nd_repstat == 0 && nd_mreq == NULL, which 427 * means a normal nfs rpc, so check the cache 428 */ 429 if ((nd->nd_flag & ND_NFSV2) && nd->nd_nam2 != NULL && 430 nfsrv_mallocmget_limit()) { 431 cacherep = RC_DROPIT; 432 } else { 433 /* 434 * For NFSv3, play it safe and assume that the client is 435 * doing retries on the same TCP connection. 436 */ 437 if ((nd->nd_flag & (ND_NFSV4 | ND_STREAMSOCK)) == 438 ND_STREAMSOCK) 439 nd->nd_flag |= ND_SAMETCPCONN; 440 nd->nd_retxid = xid; 441 nd->nd_tcpconntime = NFSD_MONOSEC; 442 nd->nd_sockref = xprt->xp_sockref; 443 if ((nd->nd_flag & ND_NFSV4) != 0) 444 nfsd_getminorvers(nd, tag, &tagstr, &taglen, 445 &minorvers); 446 if ((nd->nd_flag & ND_NFSV41) != 0) 447 /* NFSv4.1 caches replies in the session slots. */ 448 cacherep = RC_DOIT; 449 else { 450 cacherep = nfsrvd_getcache(nd); 451 ack = 0; 452 SVC_ACK(xprt, &ack); 453 nfsrc_trimcache(xprt->xp_sockref, ack, 0); 454 } 455 } 456 457 /* 458 * Handle the request. There are three cases. 459 * RC_DOIT - do the RPC 460 * RC_REPLY - return the reply already created 461 * RC_DROPIT - just throw the request away 462 */ 463 if (cacherep == RC_DOIT) { 464 if ((nd->nd_flag & ND_NFSV41) != 0) 465 nd->nd_xprt = xprt; 466 nfsrvd_dorpc(nd, isdgram, tagstr, taglen, minorvers); 467 if ((nd->nd_flag & ND_NFSV41) != 0) { 468 if (nd->nd_repstat != NFSERR_REPLYFROMCACHE && 469 (nd->nd_flag & ND_SAVEREPLY) != 0) { 470 /* Cache a copy of the reply. */ 471 m = m_copym(nd->nd_mreq, 0, M_COPYALL, 472 M_WAITOK); 473 } else 474 m = NULL; 475 if ((nd->nd_flag & ND_HASSEQUENCE) != 0) 476 nfsrv_cache_session(nd, &m); 477 if (nd->nd_repstat == NFSERR_REPLYFROMCACHE) { 478 nd->nd_repstat = 0; 479 if (m != NULL) { 480 m_freem(nd->nd_mreq); 481 nd->nd_mreq = m; 482 } 483 } 484 cacherep = RC_REPLY; 485 } else { 486 if (nd->nd_repstat == NFSERR_DONTREPLY) 487 cacherep = RC_DROPIT; 488 else 489 cacherep = RC_REPLY; 490 *rpp = nfsrvd_updatecache(nd); 491 } 492 } 493 if (tagstr != NULL && taglen > NFSV4_SMALLSTR) 494 free(tagstr, M_TEMP); 495 496 NFSEXITCODE2(0, nd); 497 return (cacherep); 498 } 499 500 static void 501 nfssvc_loss(SVCXPRT *xprt) 502 { 503 uint32_t ack; 504 505 ack = 0; 506 SVC_ACK(xprt, &ack); 507 NFSD_CURVNET_SET(NFSD_TD_TO_VNET(curthread)); 508 nfsrc_trimcache(xprt->xp_sockref, ack, 1); 509 NFSD_CURVNET_RESTORE(); 510 } 511 512 /* 513 * Adds a socket to the list for servicing by nfsds. 514 */ 515 int 516 nfsrvd_addsock(struct file *fp) 517 { 518 int siz; 519 struct socket *so; 520 int error = 0; 521 SVCXPRT *xprt; 522 static u_int64_t sockref = 0; 523 524 so = fp->f_data; 525 526 siz = sb_max_adj; 527 error = soreserve(so, siz, siz); 528 if (error) 529 goto out; 530 531 /* 532 * Steal the socket from userland so that it doesn't close 533 * unexpectedly. 534 */ 535 if (so->so_type == SOCK_DGRAM) 536 xprt = svc_dg_create(NFSD_VNET(nfsrvd_pool), so, 0, 0); 537 else 538 xprt = svc_vc_create(NFSD_VNET(nfsrvd_pool), so, 0, 0); 539 if (xprt) { 540 fp->f_ops = &badfileops; 541 fp->f_data = NULL; 542 xprt->xp_sockref = ++sockref; 543 if (NFSD_VNET(nfs_minvers) == NFS_VER2) 544 svc_reg(xprt, NFS_PROG, NFS_VER2, nfssvc_program, 545 NULL); 546 if (NFSD_VNET(nfs_minvers) <= NFS_VER3 && 547 NFSD_VNET(nfs_maxvers) >= NFS_VER3) 548 svc_reg(xprt, NFS_PROG, NFS_VER3, nfssvc_program, 549 NULL); 550 if (NFSD_VNET(nfs_maxvers) >= NFS_VER4) 551 svc_reg(xprt, NFS_PROG, NFS_VER4, nfssvc_program, 552 NULL); 553 if (so->so_type == SOCK_STREAM) 554 svc_loss_reg(xprt, nfssvc_loss); 555 SVC_RELEASE(xprt); 556 } else 557 error = EPERM; 558 559 out: 560 NFSEXITCODE(error); 561 return (error); 562 } 563 564 /* 565 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 566 * until it is killed by a signal. 567 */ 568 int 569 nfsrvd_nfsd(struct thread *td, struct nfsd_nfsd_args *args) 570 { 571 char principal[MAXHOSTNAMELEN + 5]; 572 struct proc *p; 573 int error = 0; 574 bool_t ret2, ret3, ret4; 575 576 error = copyinstr(args->principal, principal, sizeof (principal), 577 NULL); 578 if (error) 579 goto out; 580 581 /* 582 * Only the first nfsd actually does any work. The RPC code 583 * adds threads to it as needed. Any extra processes offered 584 * by nfsd just exit. If nfsd is new enough, it will call us 585 * once with a structure that specifies how many threads to 586 * use. 587 */ 588 NFSD_LOCK(); 589 if (NFSD_VNET(nfsrv_numnfsd) == 0) { 590 nfsdev_time = time_second; 591 p = td->td_proc; 592 PROC_LOCK(p); 593 p->p_flag2 |= P2_AST_SU; 594 PROC_UNLOCK(p); 595 newnfs_numnfsd++; /* Total num for all vnets. */ 596 NFSD_VNET(nfsrv_numnfsd)++; /* Num for this vnet. */ 597 598 NFSD_UNLOCK(); 599 error = nfsrv_createdevids(args, td); 600 if (error == 0) { 601 /* An empty string implies AUTH_SYS only. */ 602 if (principal[0] != '\0') { 603 ret2 = rpc_gss_set_svc_name_call(principal, 604 "kerberosv5", GSS_C_INDEFINITE, NFS_PROG, 605 NFS_VER2); 606 ret3 = rpc_gss_set_svc_name_call(principal, 607 "kerberosv5", GSS_C_INDEFINITE, NFS_PROG, 608 NFS_VER3); 609 ret4 = rpc_gss_set_svc_name_call(principal, 610 "kerberosv5", GSS_C_INDEFINITE, NFS_PROG, 611 NFS_VER4); 612 613 if (!ret2 || !ret3 || !ret4) 614 printf("nfsd: can't register svc " 615 "name %s jid:%d\n", principal, 616 td->td_ucred->cr_prison->pr_id); 617 } 618 619 NFSD_VNET(nfsrvd_pool)->sp_minthreads = 620 args->minthreads; 621 NFSD_VNET(nfsrvd_pool)->sp_maxthreads = 622 args->maxthreads; 623 624 /* 625 * If this is a pNFS service, make Getattr do a 626 * vn_start_write(), so it can do a vn_set_extattr(). 627 */ 628 if (nfsrv_devidcnt > 0) { 629 nfsrv_writerpc[NFSPROC_GETATTR] = 1; 630 nfsv4_opflag[NFSV4OP_GETATTR].modifyfs = 1; 631 } 632 633 svc_run(NFSD_VNET(nfsrvd_pool)); 634 635 /* Reset Getattr to not do a vn_start_write(). */ 636 nfsrv_writerpc[NFSPROC_GETATTR] = 0; 637 nfsv4_opflag[NFSV4OP_GETATTR].modifyfs = 0; 638 639 if (principal[0] != '\0') { 640 rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER2); 641 rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER3); 642 rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER4); 643 } 644 } 645 NFSD_LOCK(); 646 newnfs_numnfsd--; 647 NFSD_VNET(nfsrv_numnfsd)--; 648 nfsrvd_init(1); 649 PROC_LOCK(p); 650 p->p_flag2 &= ~P2_AST_SU; 651 PROC_UNLOCK(p); 652 } 653 NFSD_UNLOCK(); 654 655 out: 656 NFSEXITCODE(error); 657 return (error); 658 } 659 660 /* 661 * Initialize the data structures for the server. 662 * Handshake with any new nfsds starting up to avoid any chance of 663 * corruption. 664 */ 665 void 666 nfsrvd_init(int terminating) 667 { 668 669 NFSD_LOCK_ASSERT(); 670 671 if (terminating) { 672 NFSD_VNET(nfsd_master_proc) = NULL; 673 NFSD_UNLOCK(); 674 nfsrv_freealllayoutsanddevids(); 675 nfsrv_freeallbackchannel_xprts(); 676 svcpool_close(NFSD_VNET(nfsrvd_pool)); 677 free(nfsrv_zeropnfsdat, M_TEMP); 678 nfsrv_zeropnfsdat = NULL; 679 NFSD_LOCK(); 680 } else { 681 /* Initialize per-vnet globals once per vnet. */ 682 if (NFSD_VNET(nfsrvd_inited)) 683 return; 684 NFSD_VNET(nfsrvd_inited) = true; 685 NFSD_UNLOCK(); 686 NFSD_VNET(nfsrvd_pool) = svcpool_create("nfsd", 687 SYSCTL_STATIC_CHILDREN(_vfs_nfsd)); 688 NFSD_VNET(nfsrvd_pool)->sp_rcache = NULL; 689 NFSD_VNET(nfsrvd_pool)->sp_assign = fhanew_assign; 690 NFSD_VNET(nfsrvd_pool)->sp_done = fhanew_nd_complete; 691 NFSD_LOCK(); 692 } 693 } 694