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/*
* Copyright IBM Corp 2008
* Author: Hans-Joachim Picht <hans@linux.vnet.ibm.com>
*
* Linux for System z shutdown actions
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <ctype.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <signal.h>
#include <syslog.h>
#include <pthread.h>
#include "chreipl.h"
/*
* return the ipl type based on /sys/firmware/ipl/ipl_type
* returns 0 in case of fcp and 1 in case of ccw, -1 otherwise
*/
int get_ipl_type()
{
FILE *filp;
char reipltype[4];
char path[4096];
int rc;
strcpy(path, "/sys/firmware/ipl/ipl_type");
if (access(path, R_OK) == 0) {
filp = fopen(path, "r");
if (!filp) {
fprintf(stderr, "%s: Can not open /sys/firmware/ipl/"
"ipl_type: ", name);
fprintf(stderr, "%s\n", strerror(errno));
return -1;
}
rc = fscanf(filp, "%s", reipltype);
fclose(filp);
if (rc < 0) {
fprintf(stderr, "%s: Failed to read "
"/sys/firmware/ipl/ipl_type: ", name);
fprintf(stderr, "%s\n", strerror(errno));
return -1;
}
if (strncmp(reipltype, "fcp", strlen("fcp")) == 0)
return T_FCP;
else if (strncmp(reipltype, "ccw", strlen("ccw")) == 0)
return T_CCW;
} else {
fprintf(stderr, "%s: Can not open /sys/firmware/ipl/"
"ipl_type:", name);
fprintf(stderr, " %s\n", strerror(errno));
}
return -1;
}
/*
* return the loadparameter from /sys/firmware/ipl/loadparm
*/
int get_ipl_loadparam(void)
{
FILE *filp;
char path[4096];
int rc, val;
strcpy(path, "/sys/firmware/ipl/loadparm");
if (access(path, R_OK) == 0) {
filp = fopen(path, "r");
if (!filp) {
fprintf(stderr, "%s: Can not open /sys/firmware/ipl"
"/loadparm: ", name);
fprintf(stderr, "%s\n", strerror(errno));
return -1;
}
rc = fscanf(filp, "%d", &val);
fclose(filp);
if (rc < 0)
return -1;
else
return val;
} else {
fprintf(stderr, "%s: Can not open /sys/firmware/ipl/"
"loadparm: ", name);
fprintf(stderr, "%s\n", strerror(errno));
}
return -1;
}
/*
* print out the settings discovery in the /sys/firmware/ipl filesystem
* structure
*/
void print_ipl_settings(void)
{
int rc, type;
char bootprog[1024], lba[1024];
type = get_ipl_type();
/*
* TODO: add nss support
*/
if (type == 1)
printf("IPL type: ccw\n");
if (type == 0)
printf("IPL type: fcp\n");
rc = strrd(devno, "/sys/firmware/ipl/device");
if (rc != 0)
exit(1) /* the error msg comes from get_ipl_device */;
if (strlen(devno) > 0)
printf("Device: %s\n", devno);
if (type == 1) {
rc = get_ipl_loadparam();
if (rc != -1)
printf("Loadparm: %d\n", rc);
else
printf("Loadparm: \n");
}
if (type == 0) {
/* these settings are only available for fcp */
rc = strrd(wwpn, "/sys/firmware/reipl/fcp/wwpn");
if (rc != -1 && strlen(wwpn) > 0)
printf("WWPN: %s\n", wwpn);
rc = strrd(lun, "/sys/firmware/ipl/lun");
if (rc != -1 && strlen(lun) > 0)
printf("LUN: %s\n", lun);
rc = strrd(bootprog, "/sys/firmware/reipl/fcp/bootprog");
if (rc != -1 && strlen(bootprog) > 0)
printf("bootprog: %s\n", bootprog);
rc = strrd(lba, "/sys/firmware/ipl/br_lba");
if (rc != -1 && strlen(lba) > 0)
printf("br_lba: %s\n", lba);
}
exit(0);
}
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