1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/fs/lockd/svc.c 4 * 5 * This is the central lockd service. 6 * 7 * FIXME: Separate the lockd NFS server functionality from the lockd NFS 8 * client functionality. Oh why didn't Sun create two separate 9 * services in the first place? 10 * 11 * Authors: Olaf Kirch (okir@monad.swb.de) 12 * 13 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> 14 */ 15 16 #include <linux/module.h> 17 #include <linux/init.h> 18 #include <linux/sysctl.h> 19 #include <linux/moduleparam.h> 20 21 #include <linux/sched/signal.h> 22 #include <linux/errno.h> 23 #include <linux/in.h> 24 #include <linux/uio.h> 25 #include <linux/smp.h> 26 #include <linux/mutex.h> 27 #include <linux/kthread.h> 28 #include <linux/freezer.h> 29 #include <linux/inetdevice.h> 30 31 #include <linux/sunrpc/types.h> 32 #include <linux/sunrpc/stats.h> 33 #include <linux/sunrpc/clnt.h> 34 #include <linux/sunrpc/svc.h> 35 #include <linux/sunrpc/svcsock.h> 36 #include <linux/sunrpc/svc_xprt.h> 37 #include <net/ip.h> 38 #include <net/addrconf.h> 39 #include <net/ipv6.h> 40 #include <linux/lockd/lockd.h> 41 #include <linux/nfs.h> 42 43 #include "netns.h" 44 #include "procfs.h" 45 46 #define NLMDBG_FACILITY NLMDBG_SVC 47 #define LOCKD_BUFSIZE (1024 + NLMSVC_XDRSIZE) 48 #define ALLOWED_SIGS (sigmask(SIGKILL)) 49 50 static struct svc_program nlmsvc_program; 51 52 const struct nlmsvc_binding *nlmsvc_ops; 53 EXPORT_SYMBOL_GPL(nlmsvc_ops); 54 55 static DEFINE_MUTEX(nlmsvc_mutex); 56 static unsigned int nlmsvc_users; 57 static struct svc_serv *nlmsvc_serv; 58 unsigned long nlmsvc_timeout; 59 60 unsigned int lockd_net_id; 61 62 /* 63 * These can be set at insmod time (useful for NFS as root filesystem), 64 * and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003 65 */ 66 static unsigned long nlm_grace_period; 67 static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO; 68 static int nlm_udpport, nlm_tcpport; 69 70 /* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */ 71 static unsigned int nlm_max_connections = 1024; 72 73 /* 74 * Constants needed for the sysctl interface. 75 */ 76 static const unsigned long nlm_grace_period_min = 0; 77 static const unsigned long nlm_grace_period_max = 240; 78 static const unsigned long nlm_timeout_min = 3; 79 static const unsigned long nlm_timeout_max = 20; 80 81 #ifdef CONFIG_SYSCTL 82 static const int nlm_port_min = 0, nlm_port_max = 65535; 83 static struct ctl_table_header * nlm_sysctl_table; 84 #endif 85 86 static unsigned long get_lockd_grace_period(void) 87 { 88 /* Note: nlm_timeout should always be nonzero */ 89 if (nlm_grace_period) 90 return roundup(nlm_grace_period, nlm_timeout) * HZ; 91 else 92 return nlm_timeout * 5 * HZ; 93 } 94 95 static void grace_ender(struct work_struct *grace) 96 { 97 struct delayed_work *dwork = to_delayed_work(grace); 98 struct lockd_net *ln = container_of(dwork, struct lockd_net, 99 grace_period_end); 100 101 locks_end_grace(&ln->lockd_manager); 102 } 103 104 static void set_grace_period(struct net *net) 105 { 106 unsigned long grace_period = get_lockd_grace_period(); 107 struct lockd_net *ln = net_generic(net, lockd_net_id); 108 109 locks_start_grace(net, &ln->lockd_manager); 110 cancel_delayed_work_sync(&ln->grace_period_end); 111 schedule_delayed_work(&ln->grace_period_end, grace_period); 112 } 113 114 static void restart_grace(void) 115 { 116 if (nlmsvc_ops) { 117 struct net *net = &init_net; 118 struct lockd_net *ln = net_generic(net, lockd_net_id); 119 120 cancel_delayed_work_sync(&ln->grace_period_end); 121 locks_end_grace(&ln->lockd_manager); 122 nlmsvc_invalidate_all(); 123 set_grace_period(net); 124 } 125 } 126 127 /* 128 * This is the lockd kernel thread 129 */ 130 static int 131 lockd(void *vrqstp) 132 { 133 int err = 0; 134 struct svc_rqst *rqstp = vrqstp; 135 struct net *net = &init_net; 136 struct lockd_net *ln = net_generic(net, lockd_net_id); 137 138 /* try_to_freeze() is called from svc_recv() */ 139 set_freezable(); 140 141 /* Allow SIGKILL to tell lockd to drop all of its locks */ 142 allow_signal(SIGKILL); 143 144 dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); 145 146 /* 147 * The main request loop. We don't terminate until the last 148 * NFS mount or NFS daemon has gone away. 149 */ 150 while (!kthread_should_stop()) { 151 long timeout = MAX_SCHEDULE_TIMEOUT; 152 RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); 153 154 /* update sv_maxconn if it has changed */ 155 rqstp->rq_server->sv_maxconn = nlm_max_connections; 156 157 if (signalled()) { 158 flush_signals(current); 159 restart_grace(); 160 continue; 161 } 162 163 timeout = nlmsvc_retry_blocked(); 164 165 /* 166 * Find a socket with data available and call its 167 * recvfrom routine. 168 */ 169 err = svc_recv(rqstp, timeout); 170 if (err == -EAGAIN || err == -EINTR) 171 continue; 172 dprintk("lockd: request from %s\n", 173 svc_print_addr(rqstp, buf, sizeof(buf))); 174 175 svc_process(rqstp); 176 } 177 flush_signals(current); 178 if (nlmsvc_ops) 179 nlmsvc_invalidate_all(); 180 nlm_shutdown_hosts(); 181 cancel_delayed_work_sync(&ln->grace_period_end); 182 locks_end_grace(&ln->lockd_manager); 183 184 dprintk("lockd_down: service stopped\n"); 185 186 svc_exit_thread(rqstp); 187 return 0; 188 } 189 190 static int create_lockd_listener(struct svc_serv *serv, const char *name, 191 struct net *net, const int family, 192 const unsigned short port, 193 const struct cred *cred) 194 { 195 struct svc_xprt *xprt; 196 197 xprt = svc_find_xprt(serv, name, net, family, 0); 198 if (xprt == NULL) 199 return svc_xprt_create(serv, name, net, family, port, 200 SVC_SOCK_DEFAULTS, cred); 201 svc_xprt_put(xprt); 202 return 0; 203 } 204 205 static int create_lockd_family(struct svc_serv *serv, struct net *net, 206 const int family, const struct cred *cred) 207 { 208 int err; 209 210 err = create_lockd_listener(serv, "udp", net, family, nlm_udpport, 211 cred); 212 if (err < 0) 213 return err; 214 215 return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport, 216 cred); 217 } 218 219 /* 220 * Ensure there are active UDP and TCP listeners for lockd. 221 * 222 * Even if we have only TCP NFS mounts and/or TCP NFSDs, some 223 * local services (such as rpc.statd) still require UDP, and 224 * some NFS servers do not yet support NLM over TCP. 225 * 226 * Returns zero if all listeners are available; otherwise a 227 * negative errno value is returned. 228 */ 229 static int make_socks(struct svc_serv *serv, struct net *net, 230 const struct cred *cred) 231 { 232 static int warned; 233 int err; 234 235 err = create_lockd_family(serv, net, PF_INET, cred); 236 if (err < 0) 237 goto out_err; 238 239 err = create_lockd_family(serv, net, PF_INET6, cred); 240 if (err < 0 && err != -EAFNOSUPPORT) 241 goto out_err; 242 243 warned = 0; 244 return 0; 245 246 out_err: 247 if (warned++ == 0) 248 printk(KERN_WARNING 249 "lockd_up: makesock failed, error=%d\n", err); 250 svc_xprt_destroy_all(serv, net); 251 svc_rpcb_cleanup(serv, net); 252 return err; 253 } 254 255 static int lockd_up_net(struct svc_serv *serv, struct net *net, 256 const struct cred *cred) 257 { 258 struct lockd_net *ln = net_generic(net, lockd_net_id); 259 int error; 260 261 if (ln->nlmsvc_users++) 262 return 0; 263 264 error = svc_bind(serv, net); 265 if (error) 266 goto err_bind; 267 268 error = make_socks(serv, net, cred); 269 if (error < 0) 270 goto err_bind; 271 set_grace_period(net); 272 dprintk("%s: per-net data created; net=%x\n", __func__, net->ns.inum); 273 return 0; 274 275 err_bind: 276 ln->nlmsvc_users--; 277 return error; 278 } 279 280 static void lockd_down_net(struct svc_serv *serv, struct net *net) 281 { 282 struct lockd_net *ln = net_generic(net, lockd_net_id); 283 284 if (ln->nlmsvc_users) { 285 if (--ln->nlmsvc_users == 0) { 286 nlm_shutdown_hosts_net(net); 287 cancel_delayed_work_sync(&ln->grace_period_end); 288 locks_end_grace(&ln->lockd_manager); 289 svc_xprt_destroy_all(serv, net); 290 svc_rpcb_cleanup(serv, net); 291 } 292 } else { 293 pr_err("%s: no users! net=%x\n", 294 __func__, net->ns.inum); 295 BUG(); 296 } 297 } 298 299 static int lockd_inetaddr_event(struct notifier_block *this, 300 unsigned long event, void *ptr) 301 { 302 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr; 303 struct sockaddr_in sin; 304 305 if (event != NETDEV_DOWN) 306 goto out; 307 308 if (nlmsvc_serv) { 309 dprintk("lockd_inetaddr_event: removed %pI4\n", 310 &ifa->ifa_local); 311 sin.sin_family = AF_INET; 312 sin.sin_addr.s_addr = ifa->ifa_local; 313 svc_age_temp_xprts_now(nlmsvc_serv, (struct sockaddr *)&sin); 314 } 315 316 out: 317 return NOTIFY_DONE; 318 } 319 320 static struct notifier_block lockd_inetaddr_notifier = { 321 .notifier_call = lockd_inetaddr_event, 322 }; 323 324 #if IS_ENABLED(CONFIG_IPV6) 325 static int lockd_inet6addr_event(struct notifier_block *this, 326 unsigned long event, void *ptr) 327 { 328 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; 329 struct sockaddr_in6 sin6; 330 331 if (event != NETDEV_DOWN) 332 goto out; 333 334 if (nlmsvc_serv) { 335 dprintk("lockd_inet6addr_event: removed %pI6\n", &ifa->addr); 336 sin6.sin6_family = AF_INET6; 337 sin6.sin6_addr = ifa->addr; 338 if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 339 sin6.sin6_scope_id = ifa->idev->dev->ifindex; 340 svc_age_temp_xprts_now(nlmsvc_serv, (struct sockaddr *)&sin6); 341 } 342 343 out: 344 return NOTIFY_DONE; 345 } 346 347 static struct notifier_block lockd_inet6addr_notifier = { 348 .notifier_call = lockd_inet6addr_event, 349 }; 350 #endif 351 352 static int lockd_get(void) 353 { 354 struct svc_serv *serv; 355 int error; 356 357 if (nlmsvc_serv) { 358 nlmsvc_users++; 359 return 0; 360 } 361 362 /* 363 * Sanity check: if there's no pid, 364 * we should be the first user ... 365 */ 366 if (nlmsvc_users) 367 printk(KERN_WARNING 368 "lockd_up: no pid, %d users??\n", nlmsvc_users); 369 370 if (!nlm_timeout) 371 nlm_timeout = LOCKD_DFLT_TIMEO; 372 nlmsvc_timeout = nlm_timeout * HZ; 373 374 serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, lockd); 375 if (!serv) { 376 printk(KERN_WARNING "lockd_up: create service failed\n"); 377 return -ENOMEM; 378 } 379 380 serv->sv_maxconn = nlm_max_connections; 381 error = svc_set_num_threads(serv, NULL, 1); 382 /* The thread now holds the only reference */ 383 svc_put(serv); 384 if (error < 0) 385 return error; 386 387 nlmsvc_serv = serv; 388 register_inetaddr_notifier(&lockd_inetaddr_notifier); 389 #if IS_ENABLED(CONFIG_IPV6) 390 register_inet6addr_notifier(&lockd_inet6addr_notifier); 391 #endif 392 dprintk("lockd_up: service created\n"); 393 nlmsvc_users++; 394 return 0; 395 } 396 397 static void lockd_put(void) 398 { 399 if (WARN(nlmsvc_users <= 0, "lockd_down: no users!\n")) 400 return; 401 if (--nlmsvc_users) 402 return; 403 404 unregister_inetaddr_notifier(&lockd_inetaddr_notifier); 405 #if IS_ENABLED(CONFIG_IPV6) 406 unregister_inet6addr_notifier(&lockd_inet6addr_notifier); 407 #endif 408 409 svc_set_num_threads(nlmsvc_serv, NULL, 0); 410 nlmsvc_serv = NULL; 411 dprintk("lockd_down: service destroyed\n"); 412 } 413 414 /* 415 * Bring up the lockd process if it's not already up. 416 */ 417 int lockd_up(struct net *net, const struct cred *cred) 418 { 419 int error; 420 421 mutex_lock(&nlmsvc_mutex); 422 423 error = lockd_get(); 424 if (error) 425 goto err; 426 427 error = lockd_up_net(nlmsvc_serv, net, cred); 428 if (error < 0) { 429 lockd_put(); 430 goto err; 431 } 432 433 err: 434 mutex_unlock(&nlmsvc_mutex); 435 return error; 436 } 437 EXPORT_SYMBOL_GPL(lockd_up); 438 439 /* 440 * Decrement the user count and bring down lockd if we're the last. 441 */ 442 void 443 lockd_down(struct net *net) 444 { 445 mutex_lock(&nlmsvc_mutex); 446 lockd_down_net(nlmsvc_serv, net); 447 lockd_put(); 448 mutex_unlock(&nlmsvc_mutex); 449 } 450 EXPORT_SYMBOL_GPL(lockd_down); 451 452 #ifdef CONFIG_SYSCTL 453 454 /* 455 * Sysctl parameters (same as module parameters, different interface). 456 */ 457 458 static struct ctl_table nlm_sysctls[] = { 459 { 460 .procname = "nlm_grace_period", 461 .data = &nlm_grace_period, 462 .maxlen = sizeof(unsigned long), 463 .mode = 0644, 464 .proc_handler = proc_doulongvec_minmax, 465 .extra1 = (unsigned long *) &nlm_grace_period_min, 466 .extra2 = (unsigned long *) &nlm_grace_period_max, 467 }, 468 { 469 .procname = "nlm_timeout", 470 .data = &nlm_timeout, 471 .maxlen = sizeof(unsigned long), 472 .mode = 0644, 473 .proc_handler = proc_doulongvec_minmax, 474 .extra1 = (unsigned long *) &nlm_timeout_min, 475 .extra2 = (unsigned long *) &nlm_timeout_max, 476 }, 477 { 478 .procname = "nlm_udpport", 479 .data = &nlm_udpport, 480 .maxlen = sizeof(int), 481 .mode = 0644, 482 .proc_handler = proc_dointvec_minmax, 483 .extra1 = (int *) &nlm_port_min, 484 .extra2 = (int *) &nlm_port_max, 485 }, 486 { 487 .procname = "nlm_tcpport", 488 .data = &nlm_tcpport, 489 .maxlen = sizeof(int), 490 .mode = 0644, 491 .proc_handler = proc_dointvec_minmax, 492 .extra1 = (int *) &nlm_port_min, 493 .extra2 = (int *) &nlm_port_max, 494 }, 495 { 496 .procname = "nsm_use_hostnames", 497 .data = &nsm_use_hostnames, 498 .maxlen = sizeof(bool), 499 .mode = 0644, 500 .proc_handler = proc_dobool, 501 }, 502 { 503 .procname = "nsm_local_state", 504 .data = &nsm_local_state, 505 .maxlen = sizeof(int), 506 .mode = 0644, 507 .proc_handler = proc_dointvec, 508 }, 509 { } 510 }; 511 512 #endif /* CONFIG_SYSCTL */ 513 514 /* 515 * Module (and sysfs) parameters. 516 */ 517 518 #define param_set_min_max(name, type, which_strtol, min, max) \ 519 static int param_set_##name(const char *val, const struct kernel_param *kp) \ 520 { \ 521 char *endp; \ 522 __typeof__(type) num = which_strtol(val, &endp, 0); \ 523 if (endp == val || *endp || num < (min) || num > (max)) \ 524 return -EINVAL; \ 525 *((type *) kp->arg) = num; \ 526 return 0; \ 527 } 528 529 static inline int is_callback(u32 proc) 530 { 531 return proc == NLMPROC_GRANTED 532 || proc == NLMPROC_GRANTED_MSG 533 || proc == NLMPROC_TEST_RES 534 || proc == NLMPROC_LOCK_RES 535 || proc == NLMPROC_CANCEL_RES 536 || proc == NLMPROC_UNLOCK_RES 537 || proc == NLMPROC_NSM_NOTIFY; 538 } 539 540 541 static int lockd_authenticate(struct svc_rqst *rqstp) 542 { 543 rqstp->rq_client = NULL; 544 switch (rqstp->rq_authop->flavour) { 545 case RPC_AUTH_NULL: 546 case RPC_AUTH_UNIX: 547 rqstp->rq_auth_stat = rpc_auth_ok; 548 if (rqstp->rq_proc == 0) 549 return SVC_OK; 550 if (is_callback(rqstp->rq_proc)) { 551 /* Leave it to individual procedures to 552 * call nlmsvc_lookup_host(rqstp) 553 */ 554 return SVC_OK; 555 } 556 return svc_set_client(rqstp); 557 } 558 rqstp->rq_auth_stat = rpc_autherr_badcred; 559 return SVC_DENIED; 560 } 561 562 563 param_set_min_max(port, int, simple_strtol, 0, 65535) 564 param_set_min_max(grace_period, unsigned long, simple_strtoul, 565 nlm_grace_period_min, nlm_grace_period_max) 566 param_set_min_max(timeout, unsigned long, simple_strtoul, 567 nlm_timeout_min, nlm_timeout_max) 568 569 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 570 MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); 571 MODULE_LICENSE("GPL"); 572 573 module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, 574 &nlm_grace_period, 0644); 575 module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, 576 &nlm_timeout, 0644); 577 module_param_call(nlm_udpport, param_set_port, param_get_int, 578 &nlm_udpport, 0644); 579 module_param_call(nlm_tcpport, param_set_port, param_get_int, 580 &nlm_tcpport, 0644); 581 module_param(nsm_use_hostnames, bool, 0644); 582 module_param(nlm_max_connections, uint, 0644); 583 584 static int lockd_init_net(struct net *net) 585 { 586 struct lockd_net *ln = net_generic(net, lockd_net_id); 587 588 INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); 589 INIT_LIST_HEAD(&ln->lockd_manager.list); 590 ln->lockd_manager.block_opens = false; 591 INIT_LIST_HEAD(&ln->nsm_handles); 592 return 0; 593 } 594 595 static void lockd_exit_net(struct net *net) 596 { 597 struct lockd_net *ln = net_generic(net, lockd_net_id); 598 599 WARN_ONCE(!list_empty(&ln->lockd_manager.list), 600 "net %x %s: lockd_manager.list is not empty\n", 601 net->ns.inum, __func__); 602 WARN_ONCE(!list_empty(&ln->nsm_handles), 603 "net %x %s: nsm_handles list is not empty\n", 604 net->ns.inum, __func__); 605 WARN_ONCE(delayed_work_pending(&ln->grace_period_end), 606 "net %x %s: grace_period_end was not cancelled\n", 607 net->ns.inum, __func__); 608 } 609 610 static struct pernet_operations lockd_net_ops = { 611 .init = lockd_init_net, 612 .exit = lockd_exit_net, 613 .id = &lockd_net_id, 614 .size = sizeof(struct lockd_net), 615 }; 616 617 618 /* 619 * Initialising and terminating the module. 620 */ 621 622 static int __init init_nlm(void) 623 { 624 int err; 625 626 #ifdef CONFIG_SYSCTL 627 err = -ENOMEM; 628 nlm_sysctl_table = register_sysctl("fs/nfs", nlm_sysctls); 629 if (nlm_sysctl_table == NULL) 630 goto err_sysctl; 631 #endif 632 err = register_pernet_subsys(&lockd_net_ops); 633 if (err) 634 goto err_pernet; 635 636 err = lockd_create_procfs(); 637 if (err) 638 goto err_procfs; 639 640 return 0; 641 642 err_procfs: 643 unregister_pernet_subsys(&lockd_net_ops); 644 err_pernet: 645 #ifdef CONFIG_SYSCTL 646 unregister_sysctl_table(nlm_sysctl_table); 647 err_sysctl: 648 #endif 649 return err; 650 } 651 652 static void __exit exit_nlm(void) 653 { 654 /* FIXME: delete all NLM clients */ 655 nlm_shutdown_hosts(); 656 lockd_remove_procfs(); 657 unregister_pernet_subsys(&lockd_net_ops); 658 #ifdef CONFIG_SYSCTL 659 unregister_sysctl_table(nlm_sysctl_table); 660 #endif 661 } 662 663 module_init(init_nlm); 664 module_exit(exit_nlm); 665 666 /** 667 * nlmsvc_dispatch - Process an NLM Request 668 * @rqstp: incoming request 669 * 670 * Return values: 671 * %0: Processing complete; do not send a Reply 672 * %1: Processing complete; send Reply in rqstp->rq_res 673 */ 674 static int nlmsvc_dispatch(struct svc_rqst *rqstp) 675 { 676 const struct svc_procedure *procp = rqstp->rq_procinfo; 677 __be32 *statp = rqstp->rq_accept_statp; 678 679 if (!procp->pc_decode(rqstp, &rqstp->rq_arg_stream)) 680 goto out_decode_err; 681 682 *statp = procp->pc_func(rqstp); 683 if (*statp == rpc_drop_reply) 684 return 0; 685 if (*statp != rpc_success) 686 return 1; 687 688 if (!procp->pc_encode(rqstp, &rqstp->rq_res_stream)) 689 goto out_encode_err; 690 691 return 1; 692 693 out_decode_err: 694 *statp = rpc_garbage_args; 695 return 1; 696 697 out_encode_err: 698 *statp = rpc_system_err; 699 return 1; 700 } 701 702 /* 703 * Define NLM program and procedures 704 */ 705 static DEFINE_PER_CPU_ALIGNED(unsigned long, nlmsvc_version1_count[17]); 706 static const struct svc_version nlmsvc_version1 = { 707 .vs_vers = 1, 708 .vs_nproc = 17, 709 .vs_proc = nlmsvc_procedures, 710 .vs_count = nlmsvc_version1_count, 711 .vs_dispatch = nlmsvc_dispatch, 712 .vs_xdrsize = NLMSVC_XDRSIZE, 713 }; 714 715 static DEFINE_PER_CPU_ALIGNED(unsigned long, 716 nlmsvc_version3_count[ARRAY_SIZE(nlmsvc_procedures)]); 717 static const struct svc_version nlmsvc_version3 = { 718 .vs_vers = 3, 719 .vs_nproc = ARRAY_SIZE(nlmsvc_procedures), 720 .vs_proc = nlmsvc_procedures, 721 .vs_count = nlmsvc_version3_count, 722 .vs_dispatch = nlmsvc_dispatch, 723 .vs_xdrsize = NLMSVC_XDRSIZE, 724 }; 725 726 #ifdef CONFIG_LOCKD_V4 727 static DEFINE_PER_CPU_ALIGNED(unsigned long, 728 nlmsvc_version4_count[ARRAY_SIZE(nlmsvc_procedures4)]); 729 static const struct svc_version nlmsvc_version4 = { 730 .vs_vers = 4, 731 .vs_nproc = ARRAY_SIZE(nlmsvc_procedures4), 732 .vs_proc = nlmsvc_procedures4, 733 .vs_count = nlmsvc_version4_count, 734 .vs_dispatch = nlmsvc_dispatch, 735 .vs_xdrsize = NLMSVC_XDRSIZE, 736 }; 737 #endif 738 739 static const struct svc_version *nlmsvc_version[] = { 740 [1] = &nlmsvc_version1, 741 [3] = &nlmsvc_version3, 742 #ifdef CONFIG_LOCKD_V4 743 [4] = &nlmsvc_version4, 744 #endif 745 }; 746 747 static struct svc_stat nlmsvc_stats; 748 749 #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) 750 static struct svc_program nlmsvc_program = { 751 .pg_prog = NLM_PROGRAM, /* program number */ 752 .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ 753 .pg_vers = nlmsvc_version, /* version table */ 754 .pg_name = "lockd", /* service name */ 755 .pg_class = "nfsd", /* share authentication with nfsd */ 756 .pg_stats = &nlmsvc_stats, /* stats table */ 757 .pg_authenticate = &lockd_authenticate, /* export authentication */ 758 .pg_init_request = svc_generic_init_request, 759 .pg_rpcbind_set = svc_generic_rpcbind_set, 760 }; 761