kern.c revision 86299
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 86299 2001-11-12 16:29:45Z 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> 5075631Salfred 5175631Salfred#include "nlm_prot.h" 5283653Speter#include <nfs/rpcv2.h> 5383653Speter#include <nfs/nfsproto.h> 5483653Speter#include <nfsclient/nfs_lock.h> 5575631Salfred 5675631Salfred#include "lockd.h" 5775631Salfred#include "lockd_lock.h" 5883653Speter#include <nfsclient/nfs.h> 5975631Salfred 6086279Salfred#define DAEMON_USERNAME "daemon" 6186279Salfred 6275631Salfred#define nfslockdans(_v, _ansp) \ 6375631Salfred ((_ansp)->la_vers = _v, \ 6483653Speter nfsclnt(NFSCLNT_LOCKDANS, _ansp)) 6575631Salfred 6675631Salfred/* Lock request owner. */ 6775631Salfredtypedef struct __owner { 6875631Salfred pid_t pid; /* Process ID. */ 6975631Salfred time_t tod; /* Time-of-day. */ 7075631Salfred} OWNER; 7175631Salfredstatic OWNER owner; 7275631Salfred 7375631Salfredstatic char hostname[MAXHOSTNAMELEN + 1]; /* Hostname. */ 7475631Salfred 7586299Salfredstatic void client_cleanup(void); 7686299Salfredstatic void set_auth(CLIENT *cl, struct ucred *ucred); 7775631Salfredint lock_request(LOCKD_MSG *); 7875631Salfredint test_request(LOCKD_MSG *); 7975631Salfredvoid show(LOCKD_MSG *); 8075631Salfredint unlock_request(LOCKD_MSG *); 8175631Salfred 8275631Salfred/* 8375631Salfred * will break because fifo needs to be repopened when EOF'd 8475631Salfred */ 8575631Salfred#define lockd_seteuid(uid) seteuid(uid) 8675631Salfred 8775979Salfred#define d_calls (debug_level > 1) 8875979Salfred#define d_args (debug_level > 2) 8975631Salfred 9075979Salfred#define from_addr(sockaddr) \ 9175979Salfred (inet_ntoa((sockaddr)->sin_addr)) 9275979Salfred 9375631Salfredvoid 9486299Salfredclient_cleanup(void) 9575631Salfred{ 9675631Salfred (void)lockd_seteuid(0); 9775631Salfred (void)unlink(_PATH_LCKFIFO); 9875631Salfred exit(-1); 9975631Salfred} 10075631Salfred 10175631Salfred/* 10275631Salfred * client_request -- 10375631Salfred * Loop around messages from the kernel, forwarding them off to 10475631Salfred * NLM servers. 10575631Salfred */ 10675631Salfredpid_t 10775631Salfredclient_request(void) 10875631Salfred{ 10975631Salfred LOCKD_MSG msg; 11075631Salfred fd_set rdset; 11175631Salfred int fd, nr, ret; 11275631Salfred pid_t child; 11386279Salfred uid_t daemon_uid; 11486279Salfred mode_t old_umask; 11586279Salfred struct passwd *pw; 11675631Salfred 11775631Salfred /* Recreate the NLM fifo. */ 11875631Salfred (void)unlink(_PATH_LCKFIFO); 11986279Salfred old_umask = umask(S_IXGRP|S_IXOTH); 12075631Salfred if (mkfifo(_PATH_LCKFIFO, S_IWUSR | S_IRUSR)) { 12175631Salfred syslog(LOG_ERR, "mkfifo: %s: %m", _PATH_LCKFIFO); 12275631Salfred exit (1); 12375631Salfred } 12486279Salfred umask(old_umask); 12575631Salfred 12675631Salfred /* 12775631Salfred * Create a separate process, the client code is really a separate 12875631Salfred * daemon that shares a lot of code. 12975631Salfred */ 13075631Salfred switch (child = fork()) { 13175631Salfred case -1: 13275631Salfred err(1, "fork"); 13375631Salfred case 0: 13475631Salfred break; 13575631Salfred default: 13675631Salfred return (child); 13775631Salfred } 13875631Salfred 13986299Salfred signal(SIGHUP, (sig_t)client_cleanup); 14086299Salfred signal(SIGTERM, (sig_t)client_cleanup); 14175631Salfred 14275631Salfred /* Setup. */ 14375631Salfred (void)time(&owner.tod); 14475631Salfred owner.pid = getpid(); 14575631Salfred (void)gethostname(hostname, sizeof(hostname) - 1); 14675631Salfred 14775631Salfred /* Open the fifo for reading. */ 14886279Salfred if ((fd = open(_PATH_LCKFIFO, O_RDONLY | O_NONBLOCK)) == -1) { 14975631Salfred syslog(LOG_ERR, "open: %s: %m", _PATH_LCKFIFO); 15086279Salfred goto err; 15186279Salfred } 15286279Salfred pw = getpwnam(DAEMON_USERNAME); 15386279Salfred if (pw == NULL) { 15486279Salfred syslog(LOG_ERR, "getpwnam: %s: %m", DAEMON_USERNAME); 15586279Salfred goto err; 15686279Salfred } 15786279Salfred daemon_uid = pw->pw_uid; 15875631Salfred /* drop our root priviledges */ 15975631Salfred (void)lockd_seteuid(daemon_uid); 16075631Salfred 16175631Salfred for (;;) { 16275631Salfred /* Wait for contact... fifo's return EAGAIN when read with 16375631Salfred * no data 16475631Salfred */ 16586188Salfred /* Set up the select. */ 16686188Salfred FD_ZERO(&rdset); 16775631Salfred FD_SET(fd, &rdset); 16875631Salfred (void)select(fd + 1, &rdset, NULL, NULL, NULL); 16975631Salfred 17075631Salfred /* Read the fixed length message. */ 17175631Salfred if ((nr = read(fd, &msg, sizeof(msg))) == sizeof(msg)) { 17275631Salfred if (d_args) 17375631Salfred show(&msg); 17475631Salfred 17575631Salfred if (msg.lm_version != LOCKD_MSG_VERSION) { 17675631Salfred syslog(LOG_ERR, 17775631Salfred "unknown msg type: %d", msg.lm_version); 17875631Salfred } 17975631Salfred /* 18075631Salfred * Send it to the NLM server and don't grant the lock 18175631Salfred * if we fail for any reason. 18275631Salfred */ 18375631Salfred switch (msg.lm_fl.l_type) { 18475631Salfred case F_RDLCK: 18575631Salfred case F_WRLCK: 18675631Salfred if (msg.lm_getlk) 18775631Salfred ret = test_request(&msg); 18875631Salfred else 18975631Salfred ret = lock_request(&msg); 19075631Salfred break; 19175631Salfred case F_UNLCK: 19275631Salfred ret = unlock_request(&msg); 19375631Salfred break; 19475631Salfred default: 19575631Salfred ret = 1; 19675631Salfred syslog(LOG_ERR, 19775631Salfred "unknown lock type: %d", msg.lm_fl.l_type); 19875631Salfred break; 19975631Salfred } 20075631Salfred if (ret) { 20175631Salfred struct lockd_ans ans; 20275631Salfred 20375631Salfred ans.la_msg_ident = msg.lm_msg_ident; 20475631Salfred ans.la_errno = EHOSTUNREACH; 20575631Salfred 20675631Salfred if (nfslockdans(LOCKD_ANS_VERSION, &ans)) { 20775631Salfred syslog((errno == EPIPE ? LOG_INFO : 20875631Salfred LOG_ERR), "process %lu: %m", 20975631Salfred (u_long)msg.lm_msg_ident.pid); 21075631Salfred } 21175631Salfred } 21275631Salfred } else if (nr == -1) { 21375631Salfred if (errno != EAGAIN) { 21475631Salfred syslog(LOG_ERR, "read: %s: %m", _PATH_LCKFIFO); 21575631Salfred goto err; 21675631Salfred } 21775631Salfred } else if (nr != 0) { 21875631Salfred syslog(LOG_ERR, 21975631Salfred "%s: discard %d bytes", _PATH_LCKFIFO, nr); 22075631Salfred } 22175631Salfred } 22275631Salfred 22375631Salfred /* Reached only on error. */ 22475631Salfrederr: 22575631Salfred (void)lockd_seteuid(0); 22675631Salfred (void)unlink(_PATH_LCKFIFO); 22775631Salfred _exit (1); 22875631Salfred} 22975631Salfred 23075631Salfredvoid 23186186Salfredset_auth(cl, ucred) 23286186Salfred CLIENT *cl; 23386186Salfred struct ucred *ucred; 23475631Salfred{ 23575631Salfred if (cl->cl_auth != NULL) 23675631Salfred cl->cl_auth->ah_ops->ah_destroy(cl->cl_auth); 23775631Salfred cl->cl_auth = authunix_create(hostname, 23875631Salfred ucred->cr_uid, 23975631Salfred ucred->cr_groups[0], 24075631Salfred ucred->cr_ngroups-1, 24175631Salfred &ucred->cr_groups[1]); 24275631Salfred} 24375631Salfred 24475631Salfred 24575631Salfred/* 24675631Salfred * test_request -- 24775631Salfred * Convert a lock LOCKD_MSG into an NLM request, and send it off. 24875631Salfred */ 24975631Salfredint 25075631Salfredtest_request(LOCKD_MSG *msg) 25175631Salfred{ 25275631Salfred CLIENT *cli; 25375631Salfred struct timeval timeout = {0, 0}; /* No timeout, no response. */ 25475631Salfred char dummy; 25575631Salfred 25675631Salfred if (d_calls) 25775631Salfred syslog(LOG_DEBUG, "test request: %s: %s to %s", 25875631Salfred msg->lm_nfsv3 ? "V4" : "V1/3", 25975631Salfred msg->lm_fl.l_type == F_WRLCK ? "write" : "read", 26075631Salfred from_addr((struct sockaddr_in *)&msg->lm_addr)); 26175631Salfred 26275631Salfred if (msg->lm_nfsv3) { 26375631Salfred struct nlm4_testargs arg4; 26475631Salfred 26575631Salfred arg4.cookie.n_bytes = (char *)&msg->lm_msg_ident; 26675631Salfred arg4.cookie.n_len = sizeof(msg->lm_msg_ident); 26775631Salfred arg4.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 26875631Salfred arg4.alock.caller_name = hostname; 26975631Salfred arg4.alock.fh.n_bytes = (char *)&msg->lm_fh; 27075631Salfred arg4.alock.fh.n_len = msg->lm_fh_len; 27175631Salfred arg4.alock.oh.n_bytes = (char *)&owner; 27275631Salfred arg4.alock.oh.n_len = sizeof(owner); 27375631Salfred arg4.alock.svid = msg->lm_msg_ident.pid; 27475631Salfred arg4.alock.l_offset = msg->lm_fl.l_start; 27575631Salfred arg4.alock.l_len = msg->lm_fl.l_len; 27675631Salfred 27775631Salfred if ((cli = get_client( 27875631Salfred (struct sockaddr *)&msg->lm_addr, 27975631Salfred NLM_VERS4)) == NULL) 28075631Salfred return (1); 28175631Salfred 28275631Salfred set_auth(cli, &msg->lm_cred); 28375631Salfred (void)clnt_call(cli, NLM_TEST_MSG, 28475631Salfred xdr_nlm4_testargs, &arg4, xdr_void, &dummy, timeout); 28575631Salfred } else { 28675631Salfred struct nlm_testargs arg; 28775631Salfred 28875631Salfred arg.cookie.n_bytes = (char *)&msg->lm_msg_ident; 28975631Salfred arg.cookie.n_len = sizeof(msg->lm_msg_ident); 29075631Salfred arg.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 29175631Salfred arg.alock.caller_name = hostname; 29275631Salfred arg.alock.fh.n_bytes = (char *)&msg->lm_fh; 29375631Salfred arg.alock.fh.n_len = msg->lm_fh_len; 29475631Salfred arg.alock.oh.n_bytes = (char *)&owner; 29575631Salfred arg.alock.oh.n_len = sizeof(owner); 29675631Salfred arg.alock.svid = msg->lm_msg_ident.pid; 29775631Salfred arg.alock.l_offset = msg->lm_fl.l_start; 29875631Salfred arg.alock.l_len = msg->lm_fl.l_len; 29975631Salfred 30075631Salfred if ((cli = get_client( 30175631Salfred (struct sockaddr *)&msg->lm_addr, 30275631Salfred NLM_VERS)) == NULL) 30375631Salfred return (1); 30475631Salfred 30575631Salfred set_auth(cli, &msg->lm_cred); 30675631Salfred (void)clnt_call(cli, NLM_TEST_MSG, 30775631Salfred xdr_nlm_testargs, &arg, xdr_void, &dummy, timeout); 30875631Salfred } 30975631Salfred return (0); 31075631Salfred} 31175631Salfred 31275631Salfred/* 31375631Salfred * lock_request -- 31475631Salfred * Convert a lock LOCKD_MSG into an NLM request, and send it off. 31575631Salfred */ 31675631Salfredint 31775631Salfredlock_request(LOCKD_MSG *msg) 31875631Salfred{ 31975631Salfred CLIENT *cli; 32075631Salfred struct nlm4_lockargs arg4; 32175631Salfred struct nlm_lockargs arg; 32275631Salfred struct timeval timeout = {0, 0}; /* No timeout, no response. */ 32375631Salfred char dummy; 32475631Salfred 32575631Salfred if (d_calls) 32675631Salfred syslog(LOG_DEBUG, "lock request: %s: %s to %s", 32775631Salfred msg->lm_nfsv3 ? "V4" : "V1/3", 32875631Salfred msg->lm_fl.l_type == F_WRLCK ? "write" : "read", 32975631Salfred from_addr((struct sockaddr_in *)&msg->lm_addr)); 33075631Salfred 33175631Salfred if (msg->lm_nfsv3) { 33275631Salfred arg4.cookie.n_bytes = (char *)&msg->lm_msg_ident; 33375631Salfred arg4.cookie.n_len = sizeof(msg->lm_msg_ident); 33475631Salfred arg4.block = msg->lm_wait ? 1 : 0; 33575631Salfred arg4.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 33675631Salfred arg4.alock.caller_name = hostname; 33775631Salfred arg4.alock.fh.n_bytes = (char *)&msg->lm_fh; 33875631Salfred arg4.alock.fh.n_len = msg->lm_fh_len; 33975631Salfred arg4.alock.oh.n_bytes = (char *)&owner; 34075631Salfred arg4.alock.oh.n_len = sizeof(owner); 34175631Salfred arg4.alock.svid = msg->lm_msg_ident.pid; 34275631Salfred arg4.alock.l_offset = msg->lm_fl.l_start; 34375631Salfred arg4.alock.l_len = msg->lm_fl.l_len; 34475631Salfred arg4.reclaim = 0; 34575631Salfred arg4.state = nsm_state; 34675631Salfred 34775631Salfred if ((cli = get_client( 34875631Salfred (struct sockaddr *)&msg->lm_addr, 34975631Salfred NLM_VERS4)) == NULL) 35075631Salfred return (1); 35175631Salfred 35275631Salfred set_auth(cli, &msg->lm_cred); 35375631Salfred (void)clnt_call(cli, NLM_LOCK_MSG, 35475631Salfred xdr_nlm4_lockargs, &arg4, xdr_void, &dummy, timeout); 35575631Salfred } else { 35675631Salfred arg.cookie.n_bytes = (char *)&msg->lm_msg_ident; 35775631Salfred arg.cookie.n_len = sizeof(msg->lm_msg_ident); 35875631Salfred arg.block = msg->lm_wait ? 1 : 0; 35975631Salfred arg.exclusive = msg->lm_fl.l_type == F_WRLCK ? 1 : 0; 36075631Salfred arg.alock.caller_name = hostname; 36175631Salfred arg.alock.fh.n_bytes = (char *)&msg->lm_fh; 36275631Salfred arg.alock.fh.n_len = msg->lm_fh_len; 36375631Salfred arg.alock.oh.n_bytes = (char *)&owner; 36475631Salfred arg.alock.oh.n_len = sizeof(owner); 36575631Salfred arg.alock.svid = msg->lm_msg_ident.pid; 36675631Salfred arg.alock.l_offset = msg->lm_fl.l_start; 36775631Salfred arg.alock.l_len = msg->lm_fl.l_len; 36875631Salfred arg.reclaim = 0; 36975631Salfred arg.state = nsm_state; 37075631Salfred 37175631Salfred if ((cli = get_client( 37275631Salfred (struct sockaddr *)&msg->lm_addr, 37375631Salfred NLM_VERS)) == NULL) 37475631Salfred return (1); 37575631Salfred 37675631Salfred set_auth(cli, &msg->lm_cred); 37775631Salfred (void)clnt_call(cli, NLM_LOCK_MSG, 37875631Salfred xdr_nlm_lockargs, &arg, xdr_void, &dummy, timeout); 37975631Salfred } 38075631Salfred return (0); 38175631Salfred} 38275631Salfred 38375631Salfred/* 38475631Salfred * unlock_request -- 38575631Salfred * Convert an unlock LOCKD_MSG into an NLM request, and send it off. 38675631Salfred */ 38775631Salfredint 38875631Salfredunlock_request(LOCKD_MSG *msg) 38975631Salfred{ 39075631Salfred CLIENT *cli; 39175631Salfred struct nlm4_unlockargs arg4; 39275631Salfred struct nlm_unlockargs arg; 39375631Salfred struct timeval timeout = {0, 0}; /* No timeout, no response. */ 39475631Salfred char dummy; 39575631Salfred 39675631Salfred if (d_calls) 39775631Salfred syslog(LOG_DEBUG, "unlock request: %s: to %s", 39875631Salfred msg->lm_nfsv3 ? "V4" : "V1/3", 39975631Salfred from_addr((struct sockaddr_in *)&msg->lm_addr)); 40075631Salfred 40175631Salfred if (msg->lm_nfsv3) { 40275631Salfred arg4.cookie.n_bytes = (char *)&msg->lm_msg_ident; 40375631Salfred arg4.cookie.n_len = sizeof(msg->lm_msg_ident); 40475631Salfred arg4.alock.caller_name = hostname; 40575631Salfred arg4.alock.fh.n_bytes = (char *)&msg->lm_fh; 40675631Salfred arg4.alock.fh.n_len = msg->lm_fh_len; 40775631Salfred arg4.alock.oh.n_bytes = (char *)&owner; 40875631Salfred arg4.alock.oh.n_len = sizeof(owner); 40975631Salfred arg4.alock.svid = msg->lm_msg_ident.pid; 41075631Salfred arg4.alock.l_offset = msg->lm_fl.l_start; 41175631Salfred arg4.alock.l_len = msg->lm_fl.l_len; 41275631Salfred 41375631Salfred if ((cli = get_client( 41475631Salfred (struct sockaddr *)&msg->lm_addr, 41575631Salfred NLM_VERS4)) == NULL) 41675631Salfred return (1); 41775631Salfred 41875631Salfred set_auth(cli, &msg->lm_cred); 41975631Salfred (void)clnt_call(cli, NLM_UNLOCK_MSG, 42075631Salfred xdr_nlm4_unlockargs, &arg4, xdr_void, &dummy, timeout); 42175631Salfred } else { 42275631Salfred arg.cookie.n_bytes = (char *)&msg->lm_msg_ident; 42375631Salfred arg.cookie.n_len = sizeof(msg->lm_msg_ident); 42475631Salfred arg.alock.caller_name = hostname; 42575631Salfred arg.alock.fh.n_bytes = (char *)&msg->lm_fh; 42675631Salfred arg.alock.fh.n_len = msg->lm_fh_len; 42775631Salfred arg.alock.oh.n_bytes = (char *)&owner; 42875631Salfred arg.alock.oh.n_len = sizeof(owner); 42975631Salfred arg.alock.svid = msg->lm_msg_ident.pid; 43075631Salfred arg.alock.l_offset = msg->lm_fl.l_start; 43175631Salfred arg.alock.l_len = msg->lm_fl.l_len; 43275631Salfred 43375631Salfred if ((cli = get_client( 43475631Salfred (struct sockaddr *)&msg->lm_addr, 43575631Salfred NLM_VERS)) == NULL) 43675631Salfred return (1); 43775631Salfred 43875631Salfred set_auth(cli, &msg->lm_cred); 43975631Salfred (void)clnt_call(cli, NLM_UNLOCK_MSG, 44075631Salfred xdr_nlm_unlockargs, &arg, xdr_void, &dummy, timeout); 44175631Salfred } 44275631Salfred 44375631Salfred return (0); 44475631Salfred} 44575631Salfred 44675631Salfredint 44775631Salfredlock_answer(int pid, netobj *netcookie, int result, int *pid_p, int version) 44875631Salfred{ 44975631Salfred struct lockd_ans ans; 45075631Salfred 45175631Salfred if (netcookie->n_len != sizeof(ans.la_msg_ident)) { 45275631Salfred if (pid == -1) { /* we're screwed */ 45375631Salfred syslog(LOG_ERR, "inedible nlm cookie"); 45475631Salfred return -1; 45575631Salfred } 45675631Salfred ans.la_msg_ident.pid = pid; 45775631Salfred ans.la_msg_ident.msg_seq = -1; 45875631Salfred } else { 45986186Salfred memcpy(&ans.la_msg_ident, netcookie->n_bytes, 46086186Salfred sizeof(ans.la_msg_ident)); 46175631Salfred } 46275631Salfred 46375631Salfred if (d_calls) 46475979Salfred syslog(LOG_DEBUG, "lock answer: pid %lu: %s %d", 46586299Salfred (unsigned long)ans.la_msg_ident.pid, 46675979Salfred version == NLM_VERS4 ? "nlmv4" : "nlmv3", 46775979Salfred result); 46875631Salfred 46975631Salfred ans.la_set_getlk_pid = 0; 47075631Salfred if (version == NLM_VERS4) 47175631Salfred switch (result) { 47275631Salfred case nlm4_granted: 47375631Salfred ans.la_errno = 0; 47475631Salfred break; 47575631Salfred default: 47675631Salfred ans.la_errno = EACCES; 47775631Salfred break; 47875631Salfred case nlm4_denied: 47975631Salfred if (pid_p == NULL) 48075631Salfred ans.la_errno = EACCES; 48175631Salfred else { 48275631Salfred /* this is an answer to a nlm_test msg */ 48375631Salfred ans.la_set_getlk_pid = 1; 48475631Salfred ans.la_getlk_pid = *pid_p; 48575631Salfred ans.la_errno = 0; 48675631Salfred } 48775631Salfred break; 48875631Salfred case nlm4_denied_nolocks: 48975631Salfred ans.la_errno = EAGAIN; 49075631Salfred break; 49175631Salfred case nlm4_blocked: 49275631Salfred return -1; 49375631Salfred /* NOTREACHED */ 49475631Salfred case nlm4_denied_grace_period: 49575631Salfred ans.la_errno = EAGAIN; 49675631Salfred break; 49775631Salfred case nlm4_deadlck: 49875631Salfred ans.la_errno = EDEADLK; 49975631Salfred break; 50075631Salfred case nlm4_rofs: 50175631Salfred ans.la_errno = EROFS; 50275631Salfred break; 50375631Salfred case nlm4_stale_fh: 50475631Salfred ans.la_errno = ESTALE; 50575631Salfred break; 50675631Salfred case nlm4_fbig: 50775631Salfred ans.la_errno = EFBIG; 50875631Salfred break; 50975631Salfred case nlm4_failed: 51075631Salfred ans.la_errno = EACCES; 51175631Salfred break; 51275631Salfred } 51375631Salfred else 51475631Salfred switch (result) { 51575631Salfred case nlm_granted: 51675631Salfred ans.la_errno = 0; 51775631Salfred break; 51875631Salfred default: 51975631Salfred ans.la_errno = EACCES; 52075631Salfred break; 52175631Salfred case nlm_denied: 52275631Salfred if (pid_p == NULL) 52375631Salfred ans.la_errno = EACCES; 52475631Salfred else { 52575631Salfred /* this is an answer to a nlm_test msg */ 52675631Salfred ans.la_set_getlk_pid = 1; 52775631Salfred ans.la_getlk_pid = *pid_p; 52875631Salfred ans.la_errno = 0; 52975631Salfred } 53075631Salfred break; 53175631Salfred case nlm_denied_nolocks: 53275631Salfred ans.la_errno = EAGAIN; 53375631Salfred break; 53475631Salfred case nlm_blocked: 53575631Salfred return -1; 53675631Salfred /* NOTREACHED */ 53775631Salfred case nlm_denied_grace_period: 53875631Salfred ans.la_errno = EAGAIN; 53975631Salfred break; 54075631Salfred case nlm_deadlck: 54175631Salfred ans.la_errno = EDEADLK; 54275631Salfred break; 54375631Salfred } 54475631Salfred 54575631Salfred if (nfslockdans(LOCKD_ANS_VERSION, &ans)) { 54675631Salfred syslog(((errno == EPIPE || errno == ESRCH) ? 54775631Salfred LOG_INFO : LOG_ERR), 54875631Salfred "process %lu: %m", (u_long)ans.la_msg_ident.pid); 54975631Salfred return -1; 55075631Salfred } 55175631Salfred return 0; 55275631Salfred} 55375631Salfred 55475631Salfred/* 55575631Salfred * show -- 55675631Salfred * Display the contents of a kernel LOCKD_MSG structure. 55775631Salfred */ 55875631Salfredvoid 55975631Salfredshow(LOCKD_MSG *mp) 56075631Salfred{ 56175631Salfred static char hex[] = "0123456789abcdef"; 56275631Salfred struct fid *fidp; 56375631Salfred fsid_t *fsidp; 56475631Salfred size_t len; 56575631Salfred u_int8_t *p, *t, buf[NFS_SMALLFH*3+1]; 56675631Salfred 56786187Salfred syslog(LOG_DEBUG, "process ID: %lu\n", (long)mp->lm_msg_ident.pid); 56875631Salfred 56975631Salfred fsidp = (fsid_t *)&mp->lm_fh; 57075631Salfred fidp = (struct fid *)((u_int8_t *)&mp->lm_fh + sizeof(fsid_t)); 57175631Salfred 57275631Salfred for (t = buf, p = (u_int8_t *)mp->lm_fh, 57375631Salfred len = mp->lm_fh_len; 57475631Salfred len > 0; ++p, --len) { 57575631Salfred *t++ = '\\'; 57675631Salfred *t++ = hex[(*p & 0xf0) >> 4]; 57775631Salfred *t++ = hex[*p & 0x0f]; 57875631Salfred } 57975631Salfred *t = '\0'; 58075631Salfred 58186187Salfred syslog(LOG_DEBUG, "fh_len %d, fh %s\n", mp->lm_fh_len, buf); 58275631Salfred 58375631Salfred /* Show flock structure. */ 58486187Salfred syslog(LOG_DEBUG, "start %qu; len %qu; pid %lu; type %d; whence %d\n", 58575631Salfred mp->lm_fl.l_start, mp->lm_fl.l_len, (u_long)mp->lm_fl.l_pid, 58675631Salfred mp->lm_fl.l_type, mp->lm_fl.l_whence); 58775631Salfred 58875631Salfred /* Show wait flag. */ 58986187Salfred syslog(LOG_DEBUG, "wait was %s\n", mp->lm_wait ? "set" : "not set"); 59075631Salfred} 591