[apple/network_cmds.git] / nfsiod.tproj / nfsiod.c

/*
 * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */


#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/ucred.h>
#include <sys/wait.h>

#include <sys/mount.h>
#include <sys/time.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>

#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>

/* Global defs */
#ifdef DEBUG
int debug = 1;
#else
int debug = 0;
#endif
int *thread_status = NULL;
pthread_cond_t cond;
pthread_mutex_t mutex;

void nonfs __P((int));
void usage __P((void));
void *nfsiod_thread __P((void *));

/*
 * Nfsiod does asynchronous buffered I/O on behalf of the NFS client.
 * It does not have to be running for correct operation, but will
 * improve throughput.
 */
int
main(argc, argv)
	int argc;
	char *argv[];
{
	int ch, num_servers;
	int i, rv, threadcnt;

#define	MAXNFSIODCNT      32
#define	DEFNFSIODCNT       1
	num_servers = DEFNFSIODCNT;
	while ((ch = getopt(argc, argv, "n:")) != EOF)
		switch (ch) {
		case 'n':
			num_servers = atoi(optarg);
			if (num_servers < 1 || num_servers > MAXNFSIODCNT) {
				warnx("nfsiod count %d; reset to %d",
				    num_servers, DEFNFSIODCNT);
				num_servers = DEFNFSIODCNT;
			}
			break;
		case '?':
		default:
			usage();
		}
	argc -= optind;
	argv += optind;

	/*
	 * XXX
	 * Backward compatibility, trailing number is the count of daemons.
	 */
	if (argc > 1)
		usage();
	if (argc == 1) {
		num_servers = atoi(argv[0]);
		if (num_servers < 1 || num_servers > MAXNFSIODCNT) {
			warnx("nfsiod count %d; reset to %d",
				num_servers, DEFNFSIODCNT);
			num_servers = DEFNFSIODCNT;
		}
	}

	thread_status = malloc(sizeof(int) * num_servers);
	if (thread_status == NULL)
		errx(1, "unable to allocate memory");
	rv = pthread_cond_init(&cond, NULL);
	if (rv)
		errc(1, rv, "condition variable init failed");
	rv = pthread_mutex_init(&mutex, NULL);
	if (rv)
		errc(1, rv, "mutex init failed");

	if (debug == 0) {
		daemon(0, 0);
		(void)signal(SIGHUP, SIG_IGN);
		(void)signal(SIGINT, SIG_IGN);
		(void)signal(SIGQUIT, SIG_IGN);
		(void)signal(SIGSYS, nonfs);
	}

	openlog("nfsiod:", LOG_PID, LOG_DAEMON);

	threadcnt = 0;
	for (i=0; i < num_servers; i++) {
		pthread_t thd;
		thread_status[i] = 1;
		rv = pthread_create(&thd, NULL, nfsiod_thread, (void*)i);
		if (rv) {
			syslog(LOG_ERR, "thread_create: %s", strerror(rv));
			thread_status[i] = 0;
			continue;
		}
		threadcnt++;
	}
	/* if no threads started exit */
	if (!threadcnt)
		errx(1, "unable to start any threads");
	if (threadcnt != num_servers)
		syslog(LOG_ERR, "only able to create %d of %d threads",
			threadcnt, num_servers);

	/* wait for threads to complete */
	rv = pthread_mutex_lock(&mutex);
	if (rv)
		errc(1, rv, "mutex lock failed");
	while (threadcnt > 0) {
		rv = pthread_cond_wait(&cond, &mutex);
		if (rv)
			errc(1, rv, "nfsiod: cond wait failed");
		for (i=0; i < num_servers; i++) {
			if (!thread_status[i])
				continue;
			if (thread_status[i] == 1)
				continue;
			threadcnt--;
			thread_status[i] = 0;
			syslog(LOG_ERR, "lost nfsiod thread %d - "
				"%d of %d threads remain",
				i, threadcnt, num_servers);
		}
		rv = pthread_mutex_lock(&mutex);
		if (rv)
			errc(1, rv, "mutex lock failed");
	}

	exit (0);
}

void *
nfsiod_thread(void *arg)
{
	int rv, thread = (int)arg;
	if ((rv = nfssvc(NFSSVC_BIOD, NULL)) < 0) {
		thread_status[thread] = rv;
		syslog(LOG_ERR, "nfssvc: %s", strerror(rv));
		pthread_cond_signal(&cond);
		return NULL;
	}
	thread_status[thread] = 0;
	pthread_cond_signal(&cond);
	return NULL;
}

void
nonfs(signo)
	int signo;
{
	syslog(LOG_ERR, "missing system call: NFS not available.");
}

void
usage()
{
	(void)fprintf(stderr, "usage: nfsiod [-n num_servers]\n");
	exit(1);
}
Commit	Line	Data
b7080c8e	1	/*
ac2f15b3	2	* Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.
b7080c8e A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
2b484d24 A	6	* "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.0 (the 'License'). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
b7080c8e A	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2b484d24 A	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License."
b7080c8e A	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/*
	25	* Copyright (c) 1989, 1993
	26	* The Regents of the University of California. All rights reserved.
	27	*
	28	* This code is derived from software contributed to Berkeley by
	29	* Rick Macklem at The University of Guelph.
	30	*
	31	* Redistribution and use in source and binary forms, with or without
	32	* modification, are permitted provided that the following conditions
	33	* are met:
	34	* 1. Redistributions of source code must retain the above copyright
	35	* notice, this list of conditions and the following disclaimer.
	36	* 2. Redistributions in binary form must reproduce the above copyright
	37	* notice, this list of conditions and the following disclaimer in the
	38	* documentation and/or other materials provided with the distribution.
	39	* 3. All advertising materials mentioning features or use of this software
	40	* must display the following acknowledgement:
	41	* This product includes software developed by the University of
	42	* California, Berkeley and its contributors.
	43	* 4. Neither the name of the University nor the names of its contributors
	44	* may be used to endorse or promote products derived from this software
	45	* without specific prior written permission.
	46	*
	47	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	48	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	49	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	50	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	51	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	52	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	53	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	54	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	55	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	56	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	57	* SUCH DAMAGE.
	58	*/
	59
	60
	61	#include <sys/param.h>
	62	#include <sys/ioctl.h>
	63	#include <sys/syslog.h>
	64	#include <sys/ucred.h>
	65	#include <sys/wait.h>
	66
	67	#include <sys/mount.h>
	68	#include <sys/time.h>
	69	#include <nfs/rpcv2.h>
	70	#include <nfs/nfsproto.h>
	71	#include <nfs/nfs.h>
	72
	73	#include <err.h>
	74	#include <errno.h>
	75	#include <fcntl.h>
	76	#include <signal.h>
	77	#include <stdio.h>
	78	#include <stdlib.h>
	79	#include <unistd.h>
ac2f15b3 A	80	#include <string.h>
ac2f15b3 A	81	#include <pthread.h>
b7080c8e A	82
	83	/* Global defs */
	84	#ifdef DEBUG
	85	int debug = 1;
	86	#else
	87	int debug = 0;
	88	#endif
ac2f15b3 A	89	int *thread_status = NULL;
	90	pthread_cond_t cond;
	91	pthread_mutex_t mutex;
b7080c8e A	92
b7080c8e A	93	void nonfs __P((int));
b7080c8e	94	void usage __P((void));
ac2f15b3	95	void nfsiod_thread __P((void ));
b7080c8e A	96
	97	/*
	98	* Nfsiod does asynchronous buffered I/O on behalf of the NFS client.
	99	* It does not have to be running for correct operation, but will
	100	* improve throughput.
	101	*/
	102	int
	103	main(argc, argv)
	104	int argc;
	105	char *argv[];
	106	{
	107	int ch, num_servers;
ac2f15b3	108	int i, rv, threadcnt;
b7080c8e	109
ac2f15b3 A	110	#define MAXNFSIODCNT 32
	111	#define DEFNFSIODCNT 1
	112	num_servers = DEFNFSIODCNT;
b7080c8e A	113	while ((ch = getopt(argc, argv, "n:")) != EOF)
	114	switch (ch) {
	115	case 'n':
	116	num_servers = atoi(optarg);
ac2f15b3	117	if (num_servers < 1 \|\| num_servers > MAXNFSIODCNT) {
b7080c8e	118	warnx("nfsiod count %d; reset to %d",
ac2f15b3 A	119	num_servers, DEFNFSIODCNT);
ac2f15b3 A	120	num_servers = DEFNFSIODCNT;
b7080c8e A	121	}
	122	break;
	123	case '?':
	124	default:
	125	usage();
	126	}
	127	argc -= optind;
	128	argv += optind;
	129
	130	/*
	131	* XXX
	132	* Backward compatibility, trailing number is the count of daemons.
	133	*/
	134	if (argc > 1)
	135	usage();
	136	if (argc == 1) {
	137	num_servers = atoi(argv[0]);
ac2f15b3 A	138	if (num_servers < 1 \|\| num_servers > MAXNFSIODCNT) {
	139	warnx("nfsiod count %d; reset to %d",
	140	num_servers, DEFNFSIODCNT);
	141	num_servers = DEFNFSIODCNT;
b7080c8e A	142	}
	143	}
	144
ac2f15b3 A	145	thread_status = malloc(sizeof(int) * num_servers);
	146	if (thread_status == NULL)
	147	errx(1, "unable to allocate memory");
	148	rv = pthread_cond_init(&cond, NULL);
	149	if (rv)
	150	errc(1, rv, "condition variable init failed");
	151	rv = pthread_mutex_init(&mutex, NULL);
	152	if (rv)
	153	errc(1, rv, "mutex init failed");
	154
b7080c8e A	155	if (debug == 0) {
	156	daemon(0, 0);
	157	(void)signal(SIGHUP, SIG_IGN);
	158	(void)signal(SIGINT, SIG_IGN);
	159	(void)signal(SIGQUIT, SIG_IGN);
	160	(void)signal(SIGSYS, nonfs);
	161	}
b7080c8e A	162
	163	openlog("nfsiod:", LOG_PID, LOG_DAEMON);
	164
ac2f15b3 A	165	threadcnt = 0;
	166	for (i=0; i < num_servers; i++) {
	167	pthread_t thd;
	168	thread_status[i] = 1;
	169	rv = pthread_create(&thd, NULL, nfsiod_thread, (void*)i);
	170	if (rv) {
	171	syslog(LOG_ERR, "thread_create: %s", strerror(rv));
	172	thread_status[i] = 0;
	173	continue;
	174	}
	175	threadcnt++;
	176	}
	177	/* if no threads started exit */
	178	if (!threadcnt)
	179	errx(1, "unable to start any threads");
	180	if (threadcnt != num_servers)
	181	syslog(LOG_ERR, "only able to create %d of %d threads",
	182	threadcnt, num_servers);
	183
	184	/* wait for threads to complete */
	185	rv = pthread_mutex_lock(&mutex);
	186	if (rv)
	187	errc(1, rv, "mutex lock failed");
	188	while (threadcnt > 0) {
	189	rv = pthread_cond_wait(&cond, &mutex);
	190	if (rv)
	191	errc(1, rv, "nfsiod: cond wait failed");
	192	for (i=0; i < num_servers; i++) {
	193	if (!thread_status[i])
	194	continue;
	195	if (thread_status[i] == 1)
	196	continue;
	197	threadcnt--;
	198	thread_status[i] = 0;
	199	syslog(LOG_ERR, "lost nfsiod thread %d - "
	200	"%d of %d threads remain",
	201	i, threadcnt, num_servers);
b7080c8e	202	}
ac2f15b3 A	203	rv = pthread_mutex_lock(&mutex);
	204	if (rv)
	205	errc(1, rv, "mutex lock failed");
	206	}
	207
b7080c8e A	208	exit (0);
	209	}
	210
ac2f15b3 A	211	void *
ac2f15b3 A	212	nfsiod_thread(void *arg)
b7080c8e	213	{
ac2f15b3 A	214	int rv, thread = (int)arg;
	215	if ((rv = nfssvc(NFSSVC_BIOD, NULL)) < 0) {
	216	thread_status[thread] = rv;
	217	syslog(LOG_ERR, "nfssvc: %s", strerror(rv));
	218	pthread_cond_signal(&cond);
	219	return NULL;
	220	}
	221	thread_status[thread] = 0;
	222	pthread_cond_signal(&cond);
	223	return NULL;
b7080c8e A	224	}
	225
	226	void
ac2f15b3	227	nonfs(signo)
b7080c8e A	228	int signo;
b7080c8e A	229	{
ac2f15b3	230	syslog(LOG_ERR, "missing system call: NFS not available.");
b7080c8e A	231	}
	232
	233	void
	234	usage()
	235	{
	236	(void)fprintf(stderr, "usage: nfsiod [-n num_servers]\n");
	237	exit(1);
	238	}