sccd: StorCenter Control Daemon: leds and fan control server/client

1 files changed, 376 insertions, 0 deletions

diff --git a/packages/sccd/files/scc-utils.c b/packages/sccd/files/scc-utils.c
new file mode 100644
index 0000000000..ab48ecb677
--- /dev/null
+++ b/packages/sccd/files/scc-utils.c
@@ -0,0 +1,376 @@
+/*
+ * Copyright (c) 2006
+ *	Protium Computing, Inc.  All rights reserved.
+ *
+ * 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 Protium Computing, Inc.
+ * 4. The name of Protium Computing, Inc. may not be used to endorse or 
+ *    promote products derived from this software without specific prior 
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY PROTIUM COMPUTING ``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 PROTIUM COMPUTING 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 <stdio.h>
+#include <fcntl.h>
+#include <time.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/select.h>
+#include <sys/syslog.h>
+#include <sys/resource.h>
+#include <termios.h>
+
+#include "scc.h"
+
+int scc_die = 0;
+
+char
+scc_cksum(int *i, int *j)
+{
+	unsigned char s;
+	unsigned char *b;
+
+	b = (unsigned char *)i;
+	s = b[0] + b[1] + b[2] + b[3];
+	b = (unsigned char *)j;
+	s = s + b[0] + b[1] + b[2];
+ 	s = (s & 0x7f);
+
+	return((char)s);
+}
+
+int 
+scc_validate(int *i, int *j, int verbose)
+{
+	int r, s;
+
+	/* if (verbose) printf("Packet: [0x%08x 0x%08x]\n", *i, *j); */
+
+	switch (*i & SCC_POWERMASK) {
+	case SCC_RUN:
+		if (verbose) printf("\tPower: run\n");
+		break;
+	case SCC_STOP:
+		if (verbose) printf("\tPower: stop\n");
+		break;
+	case SCC_ADVISESTOP:
+		if (verbose) printf("\tPower: advise stop\n");
+		break;
+	case SCC_RESTART:
+		if (verbose) printf("\tPower: restart\n");
+		break;
+	case SCC_ADVISERESTART:
+		if (verbose) printf("\tPower: advise restart\n");
+		break;
+	case SCC_RESET:
+		if (verbose) printf("\tPower: reset\n");
+		break;
+	case SCC_ADVISERESET:
+		if (verbose) printf("\tPower: advise reset\n");
+		break;
+	default:
+		if (verbose) printf("validate: bad power 0x%08x\n", *i);
+		return(-1);	
+	}
+
+	switch (*i & SCC_LEDMASK) {
+	case SCC_LEDOFF:
+		if (verbose) printf("\tLed: off\n");
+		break;
+	case SCC_LEDBLUE:
+		if (verbose) printf("\tLed: blue\n");
+		break;
+	case SCC_LEDRED:
+		if (verbose) printf("\tLed: red\n");
+		break;
+	case SCC_LEDBLUEFLASH:
+		if (verbose) printf("\tLed: blue flash\n");
+		break;
+	case SCC_LEDREDFLASH:
+		if (verbose) printf("\tLed: red flash\n");
+		break;
+	case SCC_LEDALTERNATE1:
+		if (verbose) printf("\tLed: alternate1\n");
+		break;
+	case SCC_LEDALTERNATE3:
+		if (verbose) printf("\tLed: alternate3\n");
+		break;
+	default:
+		if (verbose) printf("validate: bad led value 0x%08x\n", *i);
+		return(-1);	
+	}	
+
+	r = ((*i & SCC_LEDRATEMASK)  >> SCC_LEDRATESHIFT);
+
+	if (verbose) {
+		printf("\tLed Flash Rate: %d\n", r);
+	}
+
+	if (r >= SCC_LEDRATEHI) 
+		printf("warning: led rate too high - led on (%d)\n", r);
+	if (r <= SCC_LEDRATELO) 
+		printf("warning: led rate too low - led off (%d)\n", r);
+
+
+	switch (*i & SCC_FANMASK) {
+	case SCC_FANAUTO:
+		if (verbose) printf("\tFan: auto\n");
+		break;
+	case SCC_FANON:	
+		if (verbose) printf("\tFan: on\n");
+		break;
+	default:
+		if (verbose) printf("validate: bad fan value 0x%08x\n", *i);
+		return(-1);	
+	}
+
+	r = ((*j & SCC_FANTEMPONMASK)  >> SCC_FANTEMPONSHIFT);
+	s = ((*j & SCC_FANTEMPOFFMASK) >> SCC_FANTEMPOFFSHIFT);
+
+	if (verbose) {
+		printf("\tFan On  Temprature: %dC\n", r);
+		printf("\tFan Off Temprature: %dC\n", s);
+	}
+
+	if (r >= SCC_FANTEMPONHI) 
+		printf("warning: fan on temp too high - fan off (%dC)\n", r);
+	if (s <= SCC_FANTEMPONLO) 
+		printf("warning: fan on temp too low - fan on (%dC)\n", s);
+	if ((r - s) < SCC_FANTEMPDIFF) {
+		printf("warning: fan on/off temp too close or on < off \n");
+		printf("warning:\tfan on (%dC) fan off (%dC) \n", r, s);
+	}
+
+	r = *j & SCC_IDMASK;
+	if ((r != SCC_HOST) && 
+	    (r != SCC_CTLR00) &&  
+	    (r != SCC_CTLR12)) {
+		printf("warning: bad id %08x\n", r);
+	}	
+
+	r = *j & SCC_CKSUMMASK; 
+	if (r != scc_cksum(i, j)) {
+		printf("warning: checksum incorrect (%02x != %02x)\n", 
+		       r, scc_cksum(i, j));
+	}
+	return(0);	
+}
+
+int
+scc_setval(int *i, int mask, int val)
+{
+	/* clear the field */
+	*i = (*i & (mask ^ 0xffffffff));
+
+	/* insert the field */
+	*i = (*i ^ val);
+	return(0);
+}
+
+int
+scc_setrate(int *i, int mask, int shift, int val)
+{
+	/* Assumption: val is < field width */
+
+	/* clear the field */
+	*i = (*i & (mask ^ 0xffffffff));
+
+	/* insert the field */
+	*i = (*i ^ (val << shift));
+	return(0);
+}
+
+int 
+scc_defaults(int *i, int *j)
+{
+	scc_setval(i,  SCC_POWERMASK, SCC_POWERDEFAULT);
+	scc_setval(i,  SCC_LEDMASK, SCC_LEDDEFAULT);	
+	scc_setrate(i, SCC_LEDRATEMASK, SCC_LEDRATESHIFT, SCC_LEDRATEDEFAULT);
+	scc_setval(i,  SCC_FANMASK, SCC_FANDEFAULT);
+
+	scc_setrate(j, SCC_FANTEMPONMASK, 
+		SCC_FANTEMPONSHIFT, SCC_FANTEMPONDEFAULT);
+	scc_setrate(j, SCC_FANTEMPOFFMASK, 
+		SCC_FANTEMPOFFSHIFT, SCC_FANTEMPOFFDEFAULT);
+	return(0);
+}
+
+void 
+scc_sighandler(int sig)
+{
+	/*
+	 * Just catch quit and term and set die
+	 */
+	switch(sig) {
+	case SIGQUIT:
+	case SIGTERM:
+		syslog(LOG_INFO, "Terminating");
+		scc_die=1;
+		break;
+	}
+}
+
+int
+scc_daemonize(int cores)
+{
+	int	fd, i;
+	char	pidstr[20];
+	pid_t	pid;
+
+	struct rlimit limit[1] = {{ 0, 0 }};
+
+
+	if (!cores) {
+		/* 
+		 * No corefiles please 
+		 */
+		if (getrlimit(RLIMIT_CORE, limit) == -1) {
+			perror("getrlimit");
+			return -1;
+		}
+
+		limit->rlim_cur = 0;
+
+		if (setrlimit(RLIMIT_CORE, limit) != 0) {
+			perror("setrlimit");
+			return -1;
+		}
+	}
+	
+	/*
+	 * Must be root
+	 */
+	if (getuid() != 0) {
+		fprintf(stderr, "Must be root\n");
+		return -1;
+	}
+
+	/* 
+	 * If parent isn't init, make it init.
+	 */
+	if (getppid() != 1) {
+    
+		pid = fork();
+		if (pid == -1) {
+			return -1;
+		}
+		if (pid != 0) {
+			exit(EXIT_SUCCESS);
+		}
+
+		setsid();
+
+		/*
+		 * ignore sig hup so that when our new padre exits
+		 * the kinder won't exit
+		 */
+		signal(SIGHUP, SIG_IGN);
+
+		pid = fork();
+		if (pid == -1) {
+			return -1;
+		}
+		if (pid != 0) {
+			exit(EXIT_SUCCESS);
+		}
+	}
+
+	/*
+	 * Set working dir to root
+	 */
+	chdir("/");
+
+	/*
+	 * Make sure file creations are created with explicit perms
+	 */
+	umask(0);
+
+	/*
+	 * Close all FDs
+	 */
+	for (i = 0; i < sysconf(_SC_OPEN_MAX); i++) {
+		close(i);
+	}
+	
+	/* 
+	 * set std in, out, err to /dev/null
+	 */
+	for (i = 0; i < 3; i++) {
+
+		if ((fd = open("/dev/null", (i==0?O_RDONLY:O_WRONLY))) == -1) {
+			perror("setting up stdin, stdout, stderr");
+			return -1;
+		}
+		
+		if (i != fd) {
+			if (dup2(fd, i) == -1) {
+				perror("setting up stdin, stdout, stderr");
+				return -1;
+			}
+			close(fd);
+		}
+	}
+
+	/*
+	 * Open and lock the pid file. Ensures only one daemon
+	 * Write our pid into the file 
+	 */
+	fd = open(SCC_PIDFILE, O_RDWR|O_CREAT, 0640);
+	if (fd < 0) {
+		return(-1);
+		
+	}
+	
+	if (lockf(fd, F_TLOCK, 0) < 0) {
+		/* we are not alone */
+		close(fd);
+		return(-1);
+	}
+
+	sprintf(pidstr,"%-6d\n", getpid());
+	write(fd, pidstr, strlen(pidstr)); 
+
+	/*
+	 * Open syslog
+	 */
+	openlog("sccd", LOG_PID, LOG_DAEMON);
+	syslog(LOG_INFO, "Starting");
+
+	/*
+	 * Ignore some signals and handle others
+	 */
+	signal(SIGCHLD, SIG_IGN);
+	signal(SIGTSTP, SIG_IGN);
+	signal(SIGTTOU, SIG_IGN);
+	signal(SIGTTIN, SIG_IGN);
+	signal(SIGQUIT, scc_sighandler);
+	signal(SIGTERM, scc_sighandler);
+
+	return(0);
+}
+
+