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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 current reipl type from /sys/firmware/reipl/reipl_type
* 0 = fcp, 1 = ccw, -1, error
*/
int get_reipl_type(void)
{
FILE *filp;
char reipltype[4];
char path[4096];
int rc;
strcpy(path, "/sys/firmware/reipl/reipl_type");
if (access(path, R_OK) == 0) {
filp = fopen(path, "r");
if (!filp) {
fprintf(stderr, "%s: Can not open /sys/firmware/"
"reipl/reipl_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/reipl/reipl_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;
/* TODO: add NSS support */
} else {
fprintf(stderr, "%s: Can not open /sys/firmware/reipl/"
"reipl_type:", name);
fprintf(stderr, " %s\n", strerror(errno));
}
return -1;
}
/*
* check if the specified device number is a valid device number
* which can be found in the /sys/bus/ccw/drivers/zfcp/
* structure
*/
int isfcpdev(char *devno)
{
char path[4096];
sprintf(path, "/sys/bus/ccw/drivers/zfcp/%s", devno);
if (chdir(path) != 0)
return -1;
return 0;
}
/*
* check if a device, e.g. /dev/sda1 has a valid entry in /proc/partitions
* return 0 is true, -1 otherwise
*/
int ispartition(char *devno)
{
FILE *filp;
size_t bytes_read;
char buffer[4096];
char *match;
filp = fopen("/proc/partitions", "r");
if (!filp) {
fprintf(stderr, "%s: Can not open /proc/partitions: %s\n",
name, strerror(errno));
return -1;
}
while ((bytes_read = fread(buffer, 1, sizeof(buffer), filp)) != 0) {
buffer[bytes_read] = '\0';
match = strstr(buffer, devno);
if (match != NULL)
return 0;
}
fclose(filp);
return -1;
}
/*
* return the wwpn of a device
*/
int get_wwpn(char *device, char *wwpn)
{
FILE *filp;
char path[4096];
char buf[4096];
int rc;
sprintf(path, "/sys/block/%s/device/wwpn", device);
filp = fopen(path, "r");
if (!filp) {
fprintf(stderr, "%s: Can not open %s: %s\n",
name, path, strerror(errno));
return -1;
}
rc = fscanf(filp, "%s", buf);
if (rc <= 0)
return -1;
strncpy(wwpn, buf, 20);
fclose(filp);
return 0;
}
/*
* return the lun of a device
*/
int get_lun(char *device, char *lun)
{
FILE *filp;
char buf[4096];
char path[4096];
int rc;
sprintf(path, "/sys/block/%s/device/fcp_lun", device);
filp = fopen(path, "r");
if (!filp) {
fprintf(stderr, "%s: Can not open %s: %s\n",
name, path, strerror(errno));
return -1;
}
rc = fscanf(filp, "%s", buf);
if (rc <= 0)
return -1;
strncpy(lun, buf, 20);
fclose(filp);
return 0;
}
/*
* return the device number of a device
*/
int get_fcp_devno(char *device, char *devno)
{
FILE *filp;
char buf[4096];
char path[4096];
int rc;
sprintf(path, "/sys/block/%s/device/hba_id", device);
filp = fopen(path, "r");
if (!filp) {
fprintf(stderr, "%s: Can not open %s: %s\n",
name, path, strerror(errno));
return -1;
}
rc = fscanf(filp, "%s", buf);
if (rc <= 0)
return -1;
strcpy(devno, buf);
fclose(filp);
return 0;
}
/*
* get the device from the partition
*/
int get_fcp_dev(char *partition, char *device)
{
char *start, *stop;
size_t len;
/*
* find the text between the two slashes
* in /dev/sda1, e.g. sda
*/
start = strchr(partition, '/');
stop = strrchr(partition, '/');
len = stop-start;
if (start == NULL || stop == NULL || len <= 0)
return -1;
strncpy(device, stop+1, len-1);
device[len] = '\0';
return 0;
}
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