117651Speter/*- 2250261Sdelphij * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved. 3131380Stjr * 417651Speter * Redistribution and use in source and binary forms, with or without 517651Speter * modification, are permitted provided that the following conditions 617651Speter * are met: 717651Speter * 1. Redistributions of source code must retain the above copyright 817651Speter * notice, this list of conditions and the following disclaimer. 9131380Stjr * 2. Redistributions in binary form must reproduce the above copyright 1042468Speter * notice, this list of conditions and the following disclaimer in the 1133904Ssteve * documentation and/or other materials provided with the distribution. 12250261Sdelphij * 3. Berkeley Software Design Inc's name may not be used to endorse or 1317651Speter * promote products derived from this software without specific prior 1417651Speter * written permission. 1517651Speter * 1617651Speter * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND 1717651Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1817651Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1917651Speter * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE 20131380Stjr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21131380Stjr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22131380Stjr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23131380Stjr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24131380Stjr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25131380Stjr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26131380Stjr * SUCH DAMAGE. 27131380Stjr * 28131380Stjr * from BSDI kern.c,v 1.2 1998/11/25 22:38:27 don Exp 29131380Stjr */ 30131380Stjr 31131380Stjr#include <sys/cdefs.h> 32206924Sdelphij__FBSDID("$FreeBSD$"); 33131380Stjr 34131380Stjr#include <sys/param.h> 35131380Stjr#include <sys/mount.h> 36131380Stjr#include <sys/queue.h> 37131380Stjr#include <sys/socket.h> 38131380Stjr#include <sys/stat.h> 39131380Stjr 40131380Stjr#include <netinet/in.h> 41131380Stjr#include <arpa/inet.h> 42131380Stjr 43131380Stjr#include <err.h> 44131380Stjr#include <errno.h> 45131380Stjr#include <fcntl.h> 46131380Stjr#include <paths.h> 47131380Stjr#include <pwd.h> 48131380Stjr#include <stdio.h> 49131380Stjr#include <stdlib.h> 50131380Stjr#include <string.h> 51131380Stjr#include <syslog.h> 52131380Stjr#include <unistd.h> 53205471Sdelphij#include <netdb.h> 54131380Stjr 55131380Stjr#include "nlm_prot.h" 56131380Stjr#include <nfs/nfsproto.h> 57131380Stjr#include <nfs/nfs_lock.h> 58131380Stjr 59131380Stjr#include "lockd.h" 60131380Stjr#include "lockd_lock.h" 6117651Speter#include <nfsclient/nfs.h> 6217651Speter 63131380Stjr#define DAEMON_USERNAME "daemon" 64131380Stjr 65250261Sdelphij/* Lock request owner. */ 66131380Stjrtypedef struct __owner { 6717651Speter pid_t pid; /* Process ID. */ 6817651Speter time_t tod; /* Time-of-day. */ 69131380Stjr} OWNER; 70131380Stjrstatic OWNER owner; 71131380Stjr 72131380Stjrstatic char hostname[MAXHOSTNAMELEN + 1]; /* Hostname. */ 73131380Stjrstatic int devfd; 7417651Speter 75131380Stjrstatic void client_cleanup(void); 76131380Stjrstatic const char *from_addr(struct sockaddr *); 77131380Stjrint lock_request(LOCKD_MSG *); 78131380Stjrstatic void set_auth(CLIENT *cl, struct xucred *ucred); 79131380Stjrvoid show(LOCKD_MSG *); 80131380Stjrint test_request(LOCKD_MSG *); 81131380Stjrint unlock_request(LOCKD_MSG *); 82131380Stjr 83131380Stjrstatic int 84131380Stjrnfslockdans(int vers, struct lockd_ans *ansp) 85131380Stjr{ 86131380Stjr 8717651Speter ansp->la_vers = vers; 88131380Stjr return (write(devfd, ansp, sizeof *ansp) <= 0); 89131380Stjr} 90131380Stjr 91131380Stjr/* 9217651Speter * will break because fifo needs to be repopened when EOF'd 93131380Stjr */ 94131380Stjr#define lockd_seteuid(uid) seteuid(uid) 95131380Stjr 96131380Stjr#define d_calls (debug_level > 1) 97131380Stjr#define d_args (debug_level > 2) 9817651Speter 99131380Stjrstatic const char * 100131380Stjrfrom_addr(saddr) 101131380Stjr struct sockaddr *saddr; 102131380Stjr{ 103131380Stjr static char inet_buf[INET6_ADDRSTRLEN]; 104131380Stjr 10517651Speter if (getnameinfo(saddr, saddr->sa_len, inet_buf, sizeof(inet_buf), 106131380Stjr NULL, 0, NI_NUMERICHOST) == 0) 107131380Stjr return inet_buf; 108131380Stjr return "???"; 109131380Stjr} 110131380Stjr 11117651Spetervoid 112131380Stjrclient_cleanup(void) 113131380Stjr{ 114131380Stjr (void)lockd_seteuid(0); 115131380Stjr exit(-1); 116131380Stjr} 117146081Skientzle 118205471Sdelphij/* 119205471Sdelphij * client_request -- 120205471Sdelphij * Loop around messages from the kernel, forwarding them off to 121205471Sdelphij * NLM servers. 122205471Sdelphij */ 123146081Skientzlepid_t 124146081Skientzleclient_request(void) 125146081Skientzle{ 126205471Sdelphij LOCKD_MSG msg; 127131380Stjr int nr, ret; 128131380Stjr pid_t child; 12917651Speter uid_t daemon_uid; 130131380Stjr struct passwd *pw; 131131380Stjr 132131380Stjr /* Open the dev . */ 133131380Stjr devfd = open(_PATH_DEV _PATH_NFSLCKDEV, O_RDWR | O_NONBLOCK); 134131380Stjr if (devfd < 0) { 135131380Stjr syslog(LOG_ERR, "open: %s: %m", _PATH_NFSLCKDEV); 136131380Stjr goto err; 137147790Scperciva } 138131380Stjr 13917651Speter signal(SIGPIPE, SIG_IGN); 140131380Stjr 141131380Stjr /* 142131380Stjr * Create a separate process, the client code is really a separate 143131380Stjr * daemon that shares a lot of code. 14417651Speter */ 145131380Stjr switch (child = fork()) { 146131380Stjr case -1: 147131380Stjr err(1, "fork"); 14817651Speter case 0: 149131380Stjr setproctitle("client"); 150131380Stjr break; 151131380Stjr default: 152131380Stjr setproctitle("server"); 153131380Stjr return (child); 154131380Stjr } 155131380Stjr 15617651Speter signal(SIGHUP, (sig_t)client_cleanup); 157131380Stjr signal(SIGTERM, (sig_t)client_cleanup); 158131380Stjr 159131380Stjr /* Setup. */ 160131380Stjr (void)time(&owner.tod); 161131380Stjr owner.pid = getpid(); 16217651Speter (void)gethostname(hostname, sizeof(hostname) - 1); 163131380Stjr 164131380Stjr pw = getpwnam(DAEMON_USERNAME); 165131380Stjr if (pw == NULL) { 166131380Stjr syslog(LOG_ERR, "getpwnam: %s: %m", DAEMON_USERNAME); 16717651Speter goto err; 168131380Stjr } 169205471Sdelphij daemon_uid = pw->pw_uid; 170205471Sdelphij /* drop our root privileges */ 171205471Sdelphij (void)lockd_seteuid(daemon_uid); 172205471Sdelphij 17317651Speter for (;;) { 174131380Stjr /* Read the fixed length message. */ 175131380Stjr if ((nr = read(devfd, &msg, sizeof(msg))) == sizeof(msg)) { 176131380Stjr if (d_args) 177131380Stjr show(&msg); 178131380Stjr 17917651Speter if (msg.lm_version != LOCKD_MSG_VERSION) { 180131380Stjr syslog(LOG_ERR, 181131380Stjr "unknown msg type: %d", msg.lm_version); 182131380Stjr } 183131380Stjr /* 184131380Stjr * Send it to the NLM server and don't grant the lock 185131380Stjr * if we fail for any reason. 186131380Stjr */ 187131380Stjr switch (msg.lm_fl.l_type) { 188131380Stjr case F_RDLCK: 189131380Stjr case F_WRLCK: 190131380Stjr if (msg.lm_getlk) 191131380Stjr ret = test_request(&msg); 192131380Stjr else 193131380Stjr ret = lock_request(&msg); 194131380Stjr break; 195131380Stjr case F_UNLCK: 196131380Stjr ret = unlock_request(&msg); 197131380Stjr break; 19817651Speter default: 199131380Stjr ret = 1; 200131380Stjr syslog(LOG_ERR, 201131380Stjr "unknown lock type: %d", msg.lm_fl.l_type); 202131380Stjr break; 203131380Stjr } 204131380Stjr if (ret) { 205131380Stjr struct lockd_ans ans; 206131380Stjr 207131380Stjr ans.la_msg_ident = msg.lm_msg_ident; 208131380Stjr ans.la_errno = EHOSTUNREACH; 20917651Speter 210131380Stjr if (nfslockdans(LOCKD_ANS_VERSION, &ans)) { 211250261Sdelphij syslog((errno == EPIPE ? LOG_INFO : 212250261Sdelphij LOG_ERR), "process %lu: %m", 213131380Stjr (u_long)msg.lm_msg_ident.pid); 21417651Speter } 215131380Stjr } 216131380Stjr } else if (nr == -1) { 217131380Stjr if (errno != EAGAIN) { 218205471Sdelphij syslog(LOG_ERR, "read: %s: %m", _PATH_NFSLCKDEV); 219131380Stjr goto err; 220205471Sdelphij } 221205471Sdelphij } else if (nr != 0) { 22217651Speter syslog(LOG_ERR, 223131380Stjr "%s: discard %d bytes", _PATH_NFSLCKDEV, nr); 224205471Sdelphij } 225205471Sdelphij } 226131380Stjr 227131380Stjr /* Reached only on error. */ 228205471Sdelphijerr: 229205471Sdelphij (void)lockd_seteuid(0); 230131380Stjr _exit (1); 23117651Speter} 232131380Stjr 233131380Stjrvoid 234131380Stjrset_auth(cl, xucred) 235157046Sdes CLIENT *cl; 236131380Stjr struct xucred *xucred; 237131380Stjr{ 238205471Sdelphij int ngroups; 239131380Stjr 24017651Speter ngroups = xucred->cr_ngroups - 1; 241131380Stjr if (ngroups > NGRPS) 242131380Stjr ngroups = NGRPS; 243131380Stjr if (cl->cl_auth != NULL) 244131380Stjr cl->cl_auth->ah_ops->ah_destroy(cl->cl_auth); 245131380Stjr cl->cl_auth = authunix_create(hostname, 246131380Stjr xucred->cr_uid, 247131380Stjr xucred->cr_groups[0], 24817651Speter ngroups, 24942468Speter &xucred->cr_groups[1]); 250131380Stjr} 25117651Speter 252131380Stjr 253131380Stjr/* 254131380Stjr * test_request -- 255131380Stjr * Convert a lock LOCKD_MSG into an NLM request, and send it off. 256131380Stjr */ 257131380Stjrint 25817651Spetertest_request(LOCKD_MSG *msg) 259131380Stjr{ 260131380Stjr CLIENT *cli; 261131380Stjr struct timeval timeout = {0, 0}; /* No timeout, no response. */ 262131380Stjr char dummy; 263131380Stjr 26417651Speter if (d_calls) 265131380Stjr syslog(LOG_DEBUG, "test request: %s: %s to %s", 266157046Sdes msg->lm_nfsv3 ? "V4" : "V1/3", 26717651Speter msg->lm_fl.l_type == F_WRLCK ? "write" : "read", 268131380Stjr from_addr((struct sockaddr *)&msg->lm_addr)); 269131380Stjr 270131380Stjr if (msg->lm_nfsv3) { 271131380Stjr struct nlm4_testargs arg4; 272131380Stjr 273131380Stjr arg4.cookie.n_bytes = (char *)&msg->lm_msg_ident; 274131380Stjr arg4.cookie.n_len = sizeof(msg->lm_msg_ident); 275131380Stjr arg4.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 276131380Stjr arg4.alock.caller_name = hostname; 27717651Speter arg4.alock.fh.n_bytes = (char *)&msg->lm_fh; 278131380Stjr arg4.alock.fh.n_len = msg->lm_fh_len; 279131380Stjr arg4.alock.oh.n_bytes = (char *)&owner; 280250261Sdelphij arg4.alock.oh.n_len = sizeof(owner); 281250261Sdelphij arg4.alock.svid = msg->lm_msg_ident.pid; 282131380Stjr arg4.alock.l_offset = msg->lm_fl.l_start; 28317651Speter arg4.alock.l_len = msg->lm_fl.l_len; 284131380Stjr 285131380Stjr if ((cli = get_client( 286131380Stjr (struct sockaddr *)&msg->lm_addr, 287131380Stjr NLM_VERS4)) == NULL) 288131380Stjr return (1); 289131380Stjr 29017651Speter set_auth(cli, &msg->lm_cred); 29117651Speter (void)clnt_call(cli, NLM_TEST_MSG, 292237410Sdelphij (xdrproc_t)xdr_nlm4_testargs, &arg4, 293237410Sdelphij (xdrproc_t)xdr_void, &dummy, timeout); 294237410Sdelphij } else { 295237410Sdelphij struct nlm_testargs arg; 296237410Sdelphij 297237410Sdelphij arg.cookie.n_bytes = (char *)&msg->lm_msg_ident; 298237410Sdelphij arg.cookie.n_len = sizeof(msg->lm_msg_ident); 299237410Sdelphij arg.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 30033904Ssteve arg.alock.caller_name = hostname; 30117651Speter arg.alock.fh.n_bytes = (char *)&msg->lm_fh; 302131380Stjr arg.alock.fh.n_len = msg->lm_fh_len; 303131380Stjr arg.alock.oh.n_bytes = (char *)&owner; 304131380Stjr arg.alock.oh.n_len = sizeof(owner); 305131380Stjr arg.alock.svid = msg->lm_msg_ident.pid; 30617651Speter arg.alock.l_offset = msg->lm_fl.l_start; 307 arg.alock.l_len = msg->lm_fl.l_len; 308 309 if ((cli = get_client( 310 (struct sockaddr *)&msg->lm_addr, 311 NLM_VERS)) == NULL) 312 return (1); 313 314 set_auth(cli, &msg->lm_cred); 315 (void)clnt_call(cli, NLM_TEST_MSG, 316 (xdrproc_t)xdr_nlm_testargs, &arg, 317 (xdrproc_t)xdr_void, &dummy, timeout); 318 } 319 return (0); 320} 321 322/* 323 * lock_request -- 324 * Convert a lock LOCKD_MSG into an NLM request, and send it off. 325 */ 326int 327lock_request(LOCKD_MSG *msg) 328{ 329 CLIENT *cli; 330 struct nlm4_lockargs arg4; 331 struct nlm_lockargs arg; 332 struct timeval timeout = {0, 0}; /* No timeout, no response. */ 333 char dummy; 334 335 if (d_calls) 336 syslog(LOG_DEBUG, "lock request: %s: %s to %s", 337 msg->lm_nfsv3 ? "V4" : "V1/3", 338 msg->lm_fl.l_type == F_WRLCK ? "write" : "read", 339 from_addr((struct sockaddr *)&msg->lm_addr)); 340 341 if (msg->lm_nfsv3) { 342 arg4.cookie.n_bytes = (char *)&msg->lm_msg_ident; 343 arg4.cookie.n_len = sizeof(msg->lm_msg_ident); 344 arg4.block = msg->lm_wait ? 1 : 0; 345 arg4.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 346 arg4.alock.caller_name = hostname; 347 arg4.alock.fh.n_bytes = (char *)&msg->lm_fh; 348 arg4.alock.fh.n_len = msg->lm_fh_len; 349 arg4.alock.oh.n_bytes = (char *)&owner; 350 arg4.alock.oh.n_len = sizeof(owner); 351 arg4.alock.svid = msg->lm_msg_ident.pid; 352 arg4.alock.l_offset = msg->lm_fl.l_start; 353 arg4.alock.l_len = msg->lm_fl.l_len; 354 arg4.reclaim = 0; 355 arg4.state = nsm_state; 356 357 if ((cli = get_client( 358 (struct sockaddr *)&msg->lm_addr, 359 NLM_VERS4)) == NULL) 360 return (1); 361 362 set_auth(cli, &msg->lm_cred); 363 (void)clnt_call(cli, NLM_LOCK_MSG, 364 (xdrproc_t)xdr_nlm4_lockargs, &arg4, 365 (xdrproc_t)xdr_void, &dummy, timeout); 366 } else { 367 arg.cookie.n_bytes = (char *)&msg->lm_msg_ident; 368 arg.cookie.n_len = sizeof(msg->lm_msg_ident); 369 arg.block = msg->lm_wait ? 1 : 0; 370 arg.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 371 arg.alock.caller_name = hostname; 372 arg.alock.fh.n_bytes = (char *)&msg->lm_fh; 373 arg.alock.fh.n_len = msg->lm_fh_len; 374 arg.alock.oh.n_bytes = (char *)&owner; 375 arg.alock.oh.n_len = sizeof(owner); 376 arg.alock.svid = msg->lm_msg_ident.pid; 377 arg.alock.l_offset = msg->lm_fl.l_start; 378 arg.alock.l_len = msg->lm_fl.l_len; 379 arg.reclaim = 0; 380 arg.state = nsm_state; 381 382 if ((cli = get_client( 383 (struct sockaddr *)&msg->lm_addr, 384 NLM_VERS)) == NULL) 385 return (1); 386 387 set_auth(cli, &msg->lm_cred); 388 (void)clnt_call(cli, NLM_LOCK_MSG, 389 (xdrproc_t)xdr_nlm_lockargs, &arg, 390 (xdrproc_t)xdr_void, &dummy, timeout); 391 } 392 return (0); 393} 394 395/* 396 * unlock_request -- 397 * Convert an unlock LOCKD_MSG into an NLM request, and send it off. 398 */ 399int 400unlock_request(LOCKD_MSG *msg) 401{ 402 CLIENT *cli; 403 struct nlm4_unlockargs arg4; 404 struct nlm_unlockargs arg; 405 struct timeval timeout = {0, 0}; /* No timeout, no response. */ 406 char dummy; 407 408 if (d_calls) 409 syslog(LOG_DEBUG, "unlock request: %s: to %s", 410 msg->lm_nfsv3 ? "V4" : "V1/3", 411 from_addr((struct sockaddr *)&msg->lm_addr)); 412 413 if (msg->lm_nfsv3) { 414 arg4.cookie.n_bytes = (char *)&msg->lm_msg_ident; 415 arg4.cookie.n_len = sizeof(msg->lm_msg_ident); 416 arg4.alock.caller_name = hostname; 417 arg4.alock.fh.n_bytes = (char *)&msg->lm_fh; 418 arg4.alock.fh.n_len = msg->lm_fh_len; 419 arg4.alock.oh.n_bytes = (char *)&owner; 420 arg4.alock.oh.n_len = sizeof(owner); 421 arg4.alock.svid = msg->lm_msg_ident.pid; 422 arg4.alock.l_offset = msg->lm_fl.l_start; 423 arg4.alock.l_len = msg->lm_fl.l_len; 424 425 if ((cli = get_client( 426 (struct sockaddr *)&msg->lm_addr, 427 NLM_VERS4)) == NULL) 428 return (1); 429 430 set_auth(cli, &msg->lm_cred); 431 (void)clnt_call(cli, NLM_UNLOCK_MSG, 432 (xdrproc_t)xdr_nlm4_unlockargs, &arg4, 433 (xdrproc_t)xdr_void, &dummy, timeout); 434 } else { 435 arg.cookie.n_bytes = (char *)&msg->lm_msg_ident; 436 arg.cookie.n_len = sizeof(msg->lm_msg_ident); 437 arg.alock.caller_name = hostname; 438 arg.alock.fh.n_bytes = (char *)&msg->lm_fh; 439 arg.alock.fh.n_len = msg->lm_fh_len; 440 arg.alock.oh.n_bytes = (char *)&owner; 441 arg.alock.oh.n_len = sizeof(owner); 442 arg.alock.svid = msg->lm_msg_ident.pid; 443 arg.alock.l_offset = msg->lm_fl.l_start; 444 arg.alock.l_len = msg->lm_fl.l_len; 445 446 if ((cli = get_client( 447 (struct sockaddr *)&msg->lm_addr, 448 NLM_VERS)) == NULL) 449 return (1); 450 451 set_auth(cli, &msg->lm_cred); 452 (void)clnt_call(cli, NLM_UNLOCK_MSG, 453 (xdrproc_t)xdr_nlm_unlockargs, &arg, 454 (xdrproc_t)xdr_void, &dummy, timeout); 455 } 456 457 return (0); 458} 459 460int 461lock_answer(int pid, netobj *netcookie, int result, int *pid_p, int version) 462{ 463 struct lockd_ans ans; 464 465 if (netcookie->n_len != sizeof(ans.la_msg_ident)) { 466 if (pid == -1) { /* we're screwed */ 467 syslog(LOG_ERR, "inedible nlm cookie"); 468 return -1; 469 } 470 ans.la_msg_ident.pid = pid; 471 ans.la_msg_ident.msg_seq = -1; 472 } else { 473 memcpy(&ans.la_msg_ident, netcookie->n_bytes, 474 sizeof(ans.la_msg_ident)); 475 } 476 477 if (d_calls) 478 syslog(LOG_DEBUG, "lock answer: pid %lu: %s %d", 479 (unsigned long)ans.la_msg_ident.pid, 480 version == NLM_VERS4 ? "nlmv4" : "nlmv3", 481 result); 482 483 ans.la_set_getlk_pid = 0; 484 if (version == NLM_VERS4) 485 switch (result) { 486 case nlm4_granted: 487 ans.la_errno = 0; 488 break; 489 default: 490 ans.la_errno = EACCES; 491 break; 492 case nlm4_denied: 493 if (pid_p == NULL) 494 ans.la_errno = EAGAIN; 495 else { 496 /* this is an answer to a nlm_test msg */ 497 ans.la_set_getlk_pid = 1; 498 ans.la_getlk_pid = *pid_p; 499 ans.la_errno = 0; 500 } 501 break; 502 case nlm4_denied_nolocks: 503 ans.la_errno = EAGAIN; 504 break; 505 case nlm4_blocked: 506 return -1; 507 /* NOTREACHED */ 508 case nlm4_denied_grace_period: 509 ans.la_errno = EAGAIN; 510 break; 511 case nlm4_deadlck: 512 ans.la_errno = EDEADLK; 513 break; 514 case nlm4_rofs: 515 ans.la_errno = EROFS; 516 break; 517 case nlm4_stale_fh: 518 ans.la_errno = ESTALE; 519 break; 520 case nlm4_fbig: 521 ans.la_errno = EFBIG; 522 break; 523 case nlm4_failed: 524 ans.la_errno = EACCES; 525 break; 526 } 527 else 528 switch (result) { 529 case nlm_granted: 530 ans.la_errno = 0; 531 break; 532 default: 533 ans.la_errno = EACCES; 534 break; 535 case nlm_denied: 536 if (pid_p == NULL) 537 ans.la_errno = EAGAIN; 538 else { 539 /* this is an answer to a nlm_test msg */ 540 ans.la_set_getlk_pid = 1; 541 ans.la_getlk_pid = *pid_p; 542 ans.la_errno = 0; 543 } 544 break; 545 case nlm_denied_nolocks: 546 ans.la_errno = EAGAIN; 547 break; 548 case nlm_blocked: 549 return -1; 550 /* NOTREACHED */ 551 case nlm_denied_grace_period: 552 ans.la_errno = EAGAIN; 553 break; 554 case nlm_deadlck: 555 ans.la_errno = EDEADLK; 556 break; 557 } 558 559 if (nfslockdans(LOCKD_ANS_VERSION, &ans)) { 560 syslog(((errno == EPIPE || errno == ESRCH) ? 561 LOG_INFO : LOG_ERR), 562 "process %lu: %m", (u_long)ans.la_msg_ident.pid); 563 return -1; 564 } 565 return 0; 566} 567 568/* 569 * show -- 570 * Display the contents of a kernel LOCKD_MSG structure. 571 */ 572void 573show(LOCKD_MSG *mp) 574{ 575 static char hex[] = "0123456789abcdef"; 576 struct fid *fidp; 577 fsid_t *fsidp; 578 size_t len; 579 u_int8_t *p, *t, buf[NFS_SMALLFH*3+1]; 580 581 syslog(LOG_DEBUG, "process ID: %lu\n", (long)mp->lm_msg_ident.pid); 582 583 fsidp = (fsid_t *)&mp->lm_fh; 584 fidp = (struct fid *)((u_int8_t *)&mp->lm_fh + sizeof(fsid_t)); 585 586 for (t = buf, p = (u_int8_t *)mp->lm_fh, 587 len = mp->lm_fh_len; 588 len > 0; ++p, --len) { 589 *t++ = '\\'; 590 *t++ = hex[(*p & 0xf0) >> 4]; 591 *t++ = hex[*p & 0x0f]; 592 } 593 *t = '\0'; 594 595 syslog(LOG_DEBUG, "fh_len %d, fh %s\n", (int)mp->lm_fh_len, buf); 596 597 /* Show flock structure. */ 598 syslog(LOG_DEBUG, "start %llu; len %llu; pid %lu; type %d; whence %d\n", 599 (unsigned long long)mp->lm_fl.l_start, 600 (unsigned long long)mp->lm_fl.l_len, (u_long)mp->lm_fl.l_pid, 601 mp->lm_fl.l_type, mp->lm_fl.l_whence); 602 603 /* Show wait flag. */ 604 syslog(LOG_DEBUG, "wait was %s\n", mp->lm_wait ? "set" : "not set"); 605} 606