kern.c revision 100134
175631Salfred/*- 275631Salfred * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved. 375631Salfred * 475631Salfred * Redistribution and use in source and binary forms, with or without 575631Salfred * modification, are permitted provided that the following conditions 675631Salfred * are met: 775631Salfred * 1. Redistributions of source code must retain the above copyright 875631Salfred * notice, this list of conditions and the following disclaimer. 975631Salfred * 2. Redistributions in binary form must reproduce the above copyright 1075631Salfred * notice, this list of conditions and the following disclaimer in the 1175631Salfred * documentation and/or other materials provided with the distribution. 1275631Salfred * 3. Berkeley Software Design Inc's name may not be used to endorse or 1375631Salfred * promote products derived from this software without specific prior 1475631Salfred * written permission. 1575631Salfred * 1675631Salfred * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND 1775631Salfred * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1875631Salfred * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1975631Salfred * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE 2075631Salfred * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2175631Salfred * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2275631Salfred * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2375631Salfred * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2475631Salfred * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2575631Salfred * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2675631Salfred * SUCH DAMAGE. 2775631Salfred * 2875631Salfred * from BSDI kern.c,v 1.2 1998/11/25 22:38:27 don Exp 2975631Salfred * $FreeBSD: head/usr.sbin/rpc.lockd/kern.c 100134 2002-07-15 19:40:23Z alfred $ 3075631Salfred */ 3175631Salfred 3275631Salfred#include <sys/param.h> 3375631Salfred#include <sys/mount.h> 3475631Salfred#include <sys/queue.h> 3575631Salfred#include <sys/socket.h> 3675631Salfred#include <sys/stat.h> 3775631Salfred 3886299Salfred#include <netinet/in.h> 3986299Salfred#include <arpa/inet.h> 4086299Salfred 4175631Salfred#include <err.h> 4275631Salfred#include <errno.h> 4375631Salfred#include <fcntl.h> 4486279Salfred#include <pwd.h> 4575631Salfred#include <stdio.h> 4675631Salfred#include <stdlib.h> 4775631Salfred#include <string.h> 4875631Salfred#include <syslog.h> 4975631Salfred#include <unistd.h> 50100134Salfred#include <netdb.h> 5175631Salfred 5275631Salfred#include "nlm_prot.h" 5383653Speter#include <nfs/rpcv2.h> 5483653Speter#include <nfs/nfsproto.h> 5583653Speter#include <nfsclient/nfs_lock.h> 5675631Salfred 5775631Salfred#include "lockd.h" 5875631Salfred#include "lockd_lock.h" 5983653Speter#include <nfsclient/nfs.h> 6075631Salfred 6186279Salfred#define DAEMON_USERNAME "daemon" 6286279Salfred 6375631Salfred#define nfslockdans(_v, _ansp) \ 6475631Salfred ((_ansp)->la_vers = _v, \ 6583653Speter nfsclnt(NFSCLNT_LOCKDANS, _ansp)) 6675631Salfred 6775631Salfred/* Lock request owner. */ 6875631Salfredtypedef struct __owner { 6975631Salfred pid_t pid; /* Process ID. */ 7075631Salfred time_t tod; /* Time-of-day. */ 7175631Salfred} OWNER; 7275631Salfredstatic OWNER owner; 7375631Salfred 7475631Salfredstatic char hostname[MAXHOSTNAMELEN + 1]; /* Hostname. */ 7575631Salfred 7686299Salfredstatic void client_cleanup(void); 7786299Salfredstatic void set_auth(CLIENT *cl, struct ucred *ucred); 7875631Salfredint lock_request(LOCKD_MSG *); 7975631Salfredint test_request(LOCKD_MSG *); 8075631Salfredvoid show(LOCKD_MSG *); 8175631Salfredint unlock_request(LOCKD_MSG *); 8275631Salfred 8375631Salfred/* 8475631Salfred * will break because fifo needs to be repopened when EOF'd 8575631Salfred */ 8675631Salfred#define lockd_seteuid(uid) seteuid(uid) 8775631Salfred 8875979Salfred#define d_calls (debug_level > 1) 8975979Salfred#define d_args (debug_level > 2) 9075631Salfred 91100134Salfredstatic const char * 92100134Salfredfrom_addr(saddr) 93100134Salfred struct sockaddr *saddr; 94100134Salfred{ 95100134Salfred static char inet_buf[INET6_ADDRSTRLEN]; 9675979Salfred 97100134Salfred if (getnameinfo(saddr, saddr->sa_len, inet_buf, sizeof(inet_buf), 98100134Salfred NULL, 0, NI_NUMERICHOST) == 0) 99100134Salfred return inet_buf; 100100134Salfred return "???"; 101100134Salfred} 102100134Salfred 10375631Salfredvoid 10486299Salfredclient_cleanup(void) 10575631Salfred{ 10675631Salfred (void)lockd_seteuid(0); 10775631Salfred (void)unlink(_PATH_LCKFIFO); 10875631Salfred exit(-1); 10975631Salfred} 11075631Salfred 11175631Salfred/* 11275631Salfred * client_request -- 11375631Salfred * Loop around messages from the kernel, forwarding them off to 11475631Salfred * NLM servers. 11575631Salfred */ 11675631Salfredpid_t 11775631Salfredclient_request(void) 11875631Salfred{ 11975631Salfred LOCKD_MSG msg; 12075631Salfred fd_set rdset; 12175631Salfred int fd, nr, ret; 12275631Salfred pid_t child; 12386279Salfred uid_t daemon_uid; 12486279Salfred mode_t old_umask; 12586279Salfred struct passwd *pw; 12675631Salfred 12775631Salfred /* Recreate the NLM fifo. */ 12875631Salfred (void)unlink(_PATH_LCKFIFO); 12986279Salfred old_umask = umask(S_IXGRP|S_IXOTH); 13075631Salfred if (mkfifo(_PATH_LCKFIFO, S_IWUSR | S_IRUSR)) { 13175631Salfred syslog(LOG_ERR, "mkfifo: %s: %m", _PATH_LCKFIFO); 13275631Salfred exit (1); 13375631Salfred } 13486279Salfred umask(old_umask); 13575631Salfred 13675631Salfred /* 13775631Salfred * Create a separate process, the client code is really a separate 13875631Salfred * daemon that shares a lot of code. 13975631Salfred */ 14075631Salfred switch (child = fork()) { 14175631Salfred case -1: 14275631Salfred err(1, "fork"); 14375631Salfred case 0: 14475631Salfred break; 14575631Salfred default: 14675631Salfred return (child); 14775631Salfred } 14875631Salfred 14986299Salfred signal(SIGHUP, (sig_t)client_cleanup); 15086299Salfred signal(SIGTERM, (sig_t)client_cleanup); 15175631Salfred 15275631Salfred /* Setup. */ 15375631Salfred (void)time(&owner.tod); 15475631Salfred owner.pid = getpid(); 15575631Salfred (void)gethostname(hostname, sizeof(hostname) - 1); 15675631Salfred 15775631Salfred /* Open the fifo for reading. */ 15886279Salfred if ((fd = open(_PATH_LCKFIFO, O_RDONLY | O_NONBLOCK)) == -1) { 15975631Salfred syslog(LOG_ERR, "open: %s: %m", _PATH_LCKFIFO); 16086279Salfred goto err; 16186279Salfred } 16286279Salfred pw = getpwnam(DAEMON_USERNAME); 16386279Salfred if (pw == NULL) { 16486279Salfred syslog(LOG_ERR, "getpwnam: %s: %m", DAEMON_USERNAME); 16586279Salfred goto err; 16686279Salfred } 16786279Salfred daemon_uid = pw->pw_uid; 16875631Salfred /* drop our root priviledges */ 16975631Salfred (void)lockd_seteuid(daemon_uid); 17075631Salfred 17175631Salfred for (;;) { 17275631Salfred /* Wait for contact... fifo's return EAGAIN when read with 17375631Salfred * no data 17475631Salfred */ 17586188Salfred /* Set up the select. */ 17686188Salfred FD_ZERO(&rdset); 17775631Salfred FD_SET(fd, &rdset); 17875631Salfred (void)select(fd + 1, &rdset, NULL, NULL, NULL); 17975631Salfred 18075631Salfred /* Read the fixed length message. */ 18175631Salfred if ((nr = read(fd, &msg, sizeof(msg))) == sizeof(msg)) { 18275631Salfred if (d_args) 18375631Salfred show(&msg); 18475631Salfred 18575631Salfred if (msg.lm_version != LOCKD_MSG_VERSION) { 18675631Salfred syslog(LOG_ERR, 18775631Salfred "unknown msg type: %d", msg.lm_version); 18875631Salfred } 18975631Salfred /* 19075631Salfred * Send it to the NLM server and don't grant the lock 19175631Salfred * if we fail for any reason. 19275631Salfred */ 19375631Salfred switch (msg.lm_fl.l_type) { 19475631Salfred case F_RDLCK: 19575631Salfred case F_WRLCK: 19675631Salfred if (msg.lm_getlk) 19775631Salfred ret = test_request(&msg); 19875631Salfred else 19975631Salfred ret = lock_request(&msg); 20075631Salfred break; 20175631Salfred case F_UNLCK: 20275631Salfred ret = unlock_request(&msg); 20375631Salfred break; 20475631Salfred default: 20575631Salfred ret = 1; 20675631Salfred syslog(LOG_ERR, 20775631Salfred "unknown lock type: %d", msg.lm_fl.l_type); 20875631Salfred break; 20975631Salfred } 21075631Salfred if (ret) { 21175631Salfred struct lockd_ans ans; 21275631Salfred 21375631Salfred ans.la_msg_ident = msg.lm_msg_ident; 21475631Salfred ans.la_errno = EHOSTUNREACH; 21575631Salfred 21675631Salfred if (nfslockdans(LOCKD_ANS_VERSION, &ans)) { 21775631Salfred syslog((errno == EPIPE ? LOG_INFO : 21875631Salfred LOG_ERR), "process %lu: %m", 21975631Salfred (u_long)msg.lm_msg_ident.pid); 22075631Salfred } 22175631Salfred } 22275631Salfred } else if (nr == -1) { 22375631Salfred if (errno != EAGAIN) { 22475631Salfred syslog(LOG_ERR, "read: %s: %m", _PATH_LCKFIFO); 22575631Salfred goto err; 22675631Salfred } 22775631Salfred } else if (nr != 0) { 22875631Salfred syslog(LOG_ERR, 22975631Salfred "%s: discard %d bytes", _PATH_LCKFIFO, nr); 23075631Salfred } 23175631Salfred } 23275631Salfred 23375631Salfred /* Reached only on error. */ 23475631Salfrederr: 23575631Salfred (void)lockd_seteuid(0); 23675631Salfred (void)unlink(_PATH_LCKFIFO); 23775631Salfred _exit (1); 23875631Salfred} 23975631Salfred 24075631Salfredvoid 24186186Salfredset_auth(cl, ucred) 24286186Salfred CLIENT *cl; 24386186Salfred struct ucred *ucred; 24475631Salfred{ 24575631Salfred if (cl->cl_auth != NULL) 24675631Salfred cl->cl_auth->ah_ops->ah_destroy(cl->cl_auth); 24775631Salfred cl->cl_auth = authunix_create(hostname, 24875631Salfred ucred->cr_uid, 24975631Salfred ucred->cr_groups[0], 25075631Salfred ucred->cr_ngroups-1, 25175631Salfred &ucred->cr_groups[1]); 25275631Salfred} 25375631Salfred 25475631Salfred 25575631Salfred/* 25675631Salfred * test_request -- 25775631Salfred * Convert a lock LOCKD_MSG into an NLM request, and send it off. 25875631Salfred */ 25975631Salfredint 26075631Salfredtest_request(LOCKD_MSG *msg) 26175631Salfred{ 26275631Salfred CLIENT *cli; 26375631Salfred struct timeval timeout = {0, 0}; /* No timeout, no response. */ 26475631Salfred char dummy; 26575631Salfred 26675631Salfred if (d_calls) 26775631Salfred syslog(LOG_DEBUG, "test request: %s: %s to %s", 26875631Salfred msg->lm_nfsv3 ? "V4" : "V1/3", 26975631Salfred msg->lm_fl.l_type == F_WRLCK ? "write" : "read", 270100134Salfred from_addr((struct sockaddr *)&msg->lm_addr)); 27175631Salfred 27275631Salfred if (msg->lm_nfsv3) { 27375631Salfred struct nlm4_testargs arg4; 27475631Salfred 27575631Salfred arg4.cookie.n_bytes = (char *)&msg->lm_msg_ident; 27675631Salfred arg4.cookie.n_len = sizeof(msg->lm_msg_ident); 27775631Salfred arg4.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 27875631Salfred arg4.alock.caller_name = hostname; 27975631Salfred arg4.alock.fh.n_bytes = (char *)&msg->lm_fh; 28075631Salfred arg4.alock.fh.n_len = msg->lm_fh_len; 28175631Salfred arg4.alock.oh.n_bytes = (char *)&owner; 28275631Salfred arg4.alock.oh.n_len = sizeof(owner); 28375631Salfred arg4.alock.svid = msg->lm_msg_ident.pid; 28475631Salfred arg4.alock.l_offset = msg->lm_fl.l_start; 28575631Salfred arg4.alock.l_len = msg->lm_fl.l_len; 28675631Salfred 28775631Salfred if ((cli = get_client( 28875631Salfred (struct sockaddr *)&msg->lm_addr, 28975631Salfred NLM_VERS4)) == NULL) 29075631Salfred return (1); 29175631Salfred 29275631Salfred set_auth(cli, &msg->lm_cred); 29375631Salfred (void)clnt_call(cli, NLM_TEST_MSG, 29475631Salfred xdr_nlm4_testargs, &arg4, xdr_void, &dummy, timeout); 29575631Salfred } else { 29675631Salfred struct nlm_testargs arg; 29775631Salfred 29875631Salfred arg.cookie.n_bytes = (char *)&msg->lm_msg_ident; 29975631Salfred arg.cookie.n_len = sizeof(msg->lm_msg_ident); 30075631Salfred arg.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 30175631Salfred arg.alock.caller_name = hostname; 30275631Salfred arg.alock.fh.n_bytes = (char *)&msg->lm_fh; 30375631Salfred arg.alock.fh.n_len = msg->lm_fh_len; 30475631Salfred arg.alock.oh.n_bytes = (char *)&owner; 30575631Salfred arg.alock.oh.n_len = sizeof(owner); 30675631Salfred arg.alock.svid = msg->lm_msg_ident.pid; 30775631Salfred arg.alock.l_offset = msg->lm_fl.l_start; 30875631Salfred arg.alock.l_len = msg->lm_fl.l_len; 30975631Salfred 31075631Salfred if ((cli = get_client( 31175631Salfred (struct sockaddr *)&msg->lm_addr, 31275631Salfred NLM_VERS)) == NULL) 31375631Salfred return (1); 31475631Salfred 31575631Salfred set_auth(cli, &msg->lm_cred); 31675631Salfred (void)clnt_call(cli, NLM_TEST_MSG, 31775631Salfred xdr_nlm_testargs, &arg, xdr_void, &dummy, timeout); 31875631Salfred } 31975631Salfred return (0); 32075631Salfred} 32175631Salfred 32275631Salfred/* 32375631Salfred * lock_request -- 32475631Salfred * Convert a lock LOCKD_MSG into an NLM request, and send it off. 32575631Salfred */ 32675631Salfredint 32775631Salfredlock_request(LOCKD_MSG *msg) 32875631Salfred{ 32975631Salfred CLIENT *cli; 33075631Salfred struct nlm4_lockargs arg4; 33175631Salfred struct nlm_lockargs arg; 33275631Salfred struct timeval timeout = {0, 0}; /* No timeout, no response. */ 33375631Salfred char dummy; 33475631Salfred 33575631Salfred if (d_calls) 33675631Salfred syslog(LOG_DEBUG, "lock request: %s: %s to %s", 33775631Salfred msg->lm_nfsv3 ? "V4" : "V1/3", 33875631Salfred msg->lm_fl.l_type == F_WRLCK ? "write" : "read", 339100134Salfred from_addr((struct sockaddr *)&msg->lm_addr)); 34075631Salfred 34175631Salfred if (msg->lm_nfsv3) { 34275631Salfred arg4.cookie.n_bytes = (char *)&msg->lm_msg_ident; 34375631Salfred arg4.cookie.n_len = sizeof(msg->lm_msg_ident); 34475631Salfred arg4.block = msg->lm_wait ? 1 : 0; 34575631Salfred arg4.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 34675631Salfred arg4.alock.caller_name = hostname; 34775631Salfred arg4.alock.fh.n_bytes = (char *)&msg->lm_fh; 34875631Salfred arg4.alock.fh.n_len = msg->lm_fh_len; 34975631Salfred arg4.alock.oh.n_bytes = (char *)&owner; 35075631Salfred arg4.alock.oh.n_len = sizeof(owner); 35175631Salfred arg4.alock.svid = msg->lm_msg_ident.pid; 35275631Salfred arg4.alock.l_offset = msg->lm_fl.l_start; 35375631Salfred arg4.alock.l_len = msg->lm_fl.l_len; 35475631Salfred arg4.reclaim = 0; 35575631Salfred arg4.state = nsm_state; 35675631Salfred 35775631Salfred if ((cli = get_client( 35875631Salfred (struct sockaddr *)&msg->lm_addr, 35975631Salfred NLM_VERS4)) == NULL) 36075631Salfred return (1); 36175631Salfred 36275631Salfred set_auth(cli, &msg->lm_cred); 36375631Salfred (void)clnt_call(cli, NLM_LOCK_MSG, 36475631Salfred xdr_nlm4_lockargs, &arg4, xdr_void, &dummy, timeout); 36575631Salfred } else { 36675631Salfred arg.cookie.n_bytes = (char *)&msg->lm_msg_ident; 36775631Salfred arg.cookie.n_len = sizeof(msg->lm_msg_ident); 36875631Salfred arg.block = msg->lm_wait ? 1 : 0; 36975631Salfred arg.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 37075631Salfred arg.alock.caller_name = hostname; 37175631Salfred arg.alock.fh.n_bytes = (char *)&msg->lm_fh; 37275631Salfred arg.alock.fh.n_len = msg->lm_fh_len; 37375631Salfred arg.alock.oh.n_bytes = (char *)&owner; 37475631Salfred arg.alock.oh.n_len = sizeof(owner); 37575631Salfred arg.alock.svid = msg->lm_msg_ident.pid; 37675631Salfred arg.alock.l_offset = msg->lm_fl.l_start; 37775631Salfred arg.alock.l_len = msg->lm_fl.l_len; 37875631Salfred arg.reclaim = 0; 37975631Salfred arg.state = nsm_state; 38075631Salfred 38175631Salfred if ((cli = get_client( 38275631Salfred (struct sockaddr *)&msg->lm_addr, 38375631Salfred NLM_VERS)) == NULL) 38475631Salfred return (1); 38575631Salfred 38675631Salfred set_auth(cli, &msg->lm_cred); 38775631Salfred (void)clnt_call(cli, NLM_LOCK_MSG, 38875631Salfred xdr_nlm_lockargs, &arg, xdr_void, &dummy, timeout); 38975631Salfred } 39075631Salfred return (0); 39175631Salfred} 39275631Salfred 39375631Salfred/* 39475631Salfred * unlock_request -- 39575631Salfred * Convert an unlock LOCKD_MSG into an NLM request, and send it off. 39675631Salfred */ 39775631Salfredint 39875631Salfredunlock_request(LOCKD_MSG *msg) 39975631Salfred{ 40075631Salfred CLIENT *cli; 40175631Salfred struct nlm4_unlockargs arg4; 40275631Salfred struct nlm_unlockargs arg; 40375631Salfred struct timeval timeout = {0, 0}; /* No timeout, no response. */ 40475631Salfred char dummy; 40575631Salfred 40675631Salfred if (d_calls) 40775631Salfred syslog(LOG_DEBUG, "unlock request: %s: to %s", 40875631Salfred msg->lm_nfsv3 ? "V4" : "V1/3", 409100134Salfred from_addr((struct sockaddr *)&msg->lm_addr)); 41075631Salfred 41175631Salfred if (msg->lm_nfsv3) { 41275631Salfred arg4.cookie.n_bytes = (char *)&msg->lm_msg_ident; 41375631Salfred arg4.cookie.n_len = sizeof(msg->lm_msg_ident); 41475631Salfred arg4.alock.caller_name = hostname; 41575631Salfred arg4.alock.fh.n_bytes = (char *)&msg->lm_fh; 41675631Salfred arg4.alock.fh.n_len = msg->lm_fh_len; 41775631Salfred arg4.alock.oh.n_bytes = (char *)&owner; 41875631Salfred arg4.alock.oh.n_len = sizeof(owner); 41975631Salfred arg4.alock.svid = msg->lm_msg_ident.pid; 42075631Salfred arg4.alock.l_offset = msg->lm_fl.l_start; 42175631Salfred arg4.alock.l_len = msg->lm_fl.l_len; 42275631Salfred 42375631Salfred if ((cli = get_client( 42475631Salfred (struct sockaddr *)&msg->lm_addr, 42575631Salfred NLM_VERS4)) == NULL) 42675631Salfred return (1); 42775631Salfred 42875631Salfred set_auth(cli, &msg->lm_cred); 42975631Salfred (void)clnt_call(cli, NLM_UNLOCK_MSG, 43075631Salfred xdr_nlm4_unlockargs, &arg4, xdr_void, &dummy, timeout); 43175631Salfred } else { 43275631Salfred arg.cookie.n_bytes = (char *)&msg->lm_msg_ident; 43375631Salfred arg.cookie.n_len = sizeof(msg->lm_msg_ident); 43475631Salfred arg.alock.caller_name = hostname; 43575631Salfred arg.alock.fh.n_bytes = (char *)&msg->lm_fh; 43675631Salfred arg.alock.fh.n_len = msg->lm_fh_len; 43775631Salfred arg.alock.oh.n_bytes = (char *)&owner; 43875631Salfred arg.alock.oh.n_len = sizeof(owner); 43975631Salfred arg.alock.svid = msg->lm_msg_ident.pid; 44075631Salfred arg.alock.l_offset = msg->lm_fl.l_start; 44175631Salfred arg.alock.l_len = msg->lm_fl.l_len; 44275631Salfred 44375631Salfred if ((cli = get_client( 44475631Salfred (struct sockaddr *)&msg->lm_addr, 44575631Salfred NLM_VERS)) == NULL) 44675631Salfred return (1); 44775631Salfred 44875631Salfred set_auth(cli, &msg->lm_cred); 44975631Salfred (void)clnt_call(cli, NLM_UNLOCK_MSG, 45075631Salfred xdr_nlm_unlockargs, &arg, xdr_void, &dummy, timeout); 45175631Salfred } 45275631Salfred 45375631Salfred return (0); 45475631Salfred} 45575631Salfred 45675631Salfredint 45775631Salfredlock_answer(int pid, netobj *netcookie, int result, int *pid_p, int version) 45875631Salfred{ 45975631Salfred struct lockd_ans ans; 46075631Salfred 46175631Salfred if (netcookie->n_len != sizeof(ans.la_msg_ident)) { 46275631Salfred if (pid == -1) { /* we're screwed */ 46375631Salfred syslog(LOG_ERR, "inedible nlm cookie"); 46475631Salfred return -1; 46575631Salfred } 46675631Salfred ans.la_msg_ident.pid = pid; 46775631Salfred ans.la_msg_ident.msg_seq = -1; 46875631Salfred } else { 46986186Salfred memcpy(&ans.la_msg_ident, netcookie->n_bytes, 47086186Salfred sizeof(ans.la_msg_ident)); 47175631Salfred } 47275631Salfred 47375631Salfred if (d_calls) 47475979Salfred syslog(LOG_DEBUG, "lock answer: pid %lu: %s %d", 47586299Salfred (unsigned long)ans.la_msg_ident.pid, 47675979Salfred version == NLM_VERS4 ? "nlmv4" : "nlmv3", 47775979Salfred result); 47875631Salfred 47975631Salfred ans.la_set_getlk_pid = 0; 48075631Salfred if (version == NLM_VERS4) 48175631Salfred switch (result) { 48275631Salfred case nlm4_granted: 48375631Salfred ans.la_errno = 0; 48475631Salfred break; 48575631Salfred default: 48675631Salfred ans.la_errno = EACCES; 48775631Salfred break; 48875631Salfred case nlm4_denied: 48975631Salfred if (pid_p == NULL) 49075631Salfred ans.la_errno = EACCES; 49175631Salfred else { 49275631Salfred /* this is an answer to a nlm_test msg */ 49375631Salfred ans.la_set_getlk_pid = 1; 49475631Salfred ans.la_getlk_pid = *pid_p; 49575631Salfred ans.la_errno = 0; 49675631Salfred } 49775631Salfred break; 49875631Salfred case nlm4_denied_nolocks: 49975631Salfred ans.la_errno = EAGAIN; 50075631Salfred break; 50175631Salfred case nlm4_blocked: 50275631Salfred return -1; 50375631Salfred /* NOTREACHED */ 50475631Salfred case nlm4_denied_grace_period: 50575631Salfred ans.la_errno = EAGAIN; 50675631Salfred break; 50775631Salfred case nlm4_deadlck: 50875631Salfred ans.la_errno = EDEADLK; 50975631Salfred break; 51075631Salfred case nlm4_rofs: 51175631Salfred ans.la_errno = EROFS; 51275631Salfred break; 51375631Salfred case nlm4_stale_fh: 51475631Salfred ans.la_errno = ESTALE; 51575631Salfred break; 51675631Salfred case nlm4_fbig: 51775631Salfred ans.la_errno = EFBIG; 51875631Salfred break; 51975631Salfred case nlm4_failed: 52075631Salfred ans.la_errno = EACCES; 52175631Salfred break; 52275631Salfred } 52375631Salfred else 52475631Salfred switch (result) { 52575631Salfred case nlm_granted: 52675631Salfred ans.la_errno = 0; 52775631Salfred break; 52875631Salfred default: 52975631Salfred ans.la_errno = EACCES; 53075631Salfred break; 53175631Salfred case nlm_denied: 53275631Salfred if (pid_p == NULL) 53375631Salfred ans.la_errno = EACCES; 53475631Salfred else { 53575631Salfred /* this is an answer to a nlm_test msg */ 53675631Salfred ans.la_set_getlk_pid = 1; 53775631Salfred ans.la_getlk_pid = *pid_p; 53875631Salfred ans.la_errno = 0; 53975631Salfred } 54075631Salfred break; 54175631Salfred case nlm_denied_nolocks: 54275631Salfred ans.la_errno = EAGAIN; 54375631Salfred break; 54475631Salfred case nlm_blocked: 54575631Salfred return -1; 54675631Salfred /* NOTREACHED */ 54775631Salfred case nlm_denied_grace_period: 54875631Salfred ans.la_errno = EAGAIN; 54975631Salfred break; 55075631Salfred case nlm_deadlck: 55175631Salfred ans.la_errno = EDEADLK; 55275631Salfred break; 55375631Salfred } 55475631Salfred 55575631Salfred if (nfslockdans(LOCKD_ANS_VERSION, &ans)) { 55675631Salfred syslog(((errno == EPIPE || errno == ESRCH) ? 55775631Salfred LOG_INFO : LOG_ERR), 55875631Salfred "process %lu: %m", (u_long)ans.la_msg_ident.pid); 55975631Salfred return -1; 56075631Salfred } 56175631Salfred return 0; 56275631Salfred} 56375631Salfred 56475631Salfred/* 56575631Salfred * show -- 56675631Salfred * Display the contents of a kernel LOCKD_MSG structure. 56775631Salfred */ 56875631Salfredvoid 56975631Salfredshow(LOCKD_MSG *mp) 57075631Salfred{ 57175631Salfred static char hex[] = "0123456789abcdef"; 57275631Salfred struct fid *fidp; 57375631Salfred fsid_t *fsidp; 57475631Salfred size_t len; 57575631Salfred u_int8_t *p, *t, buf[NFS_SMALLFH*3+1]; 57675631Salfred 57786187Salfred syslog(LOG_DEBUG, "process ID: %lu\n", (long)mp->lm_msg_ident.pid); 57875631Salfred 57975631Salfred fsidp = (fsid_t *)&mp->lm_fh; 58075631Salfred fidp = (struct fid *)((u_int8_t *)&mp->lm_fh + sizeof(fsid_t)); 58175631Salfred 58275631Salfred for (t = buf, p = (u_int8_t *)mp->lm_fh, 58375631Salfred len = mp->lm_fh_len; 58475631Salfred len > 0; ++p, --len) { 58575631Salfred *t++ = '\\'; 58675631Salfred *t++ = hex[(*p & 0xf0) >> 4]; 58775631Salfred *t++ = hex[*p & 0x0f]; 58875631Salfred } 58975631Salfred *t = '\0'; 59075631Salfred 59186187Salfred syslog(LOG_DEBUG, "fh_len %d, fh %s\n", mp->lm_fh_len, buf); 59275631Salfred 59375631Salfred /* Show flock structure. */ 59486187Salfred syslog(LOG_DEBUG, "start %qu; len %qu; pid %lu; type %d; whence %d\n", 59575631Salfred mp->lm_fl.l_start, mp->lm_fl.l_len, (u_long)mp->lm_fl.l_pid, 59675631Salfred mp->lm_fl.l_type, mp->lm_fl.l_whence); 59775631Salfred 59875631Salfred /* Show wait flag. */ 59986187Salfred syslog(LOG_DEBUG, "wait was %s\n", mp->lm_wait ? "set" : "not set"); 60075631Salfred} 601