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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#include "../../libmultipath/sg_include.h"
#define INQUIRY_CMD 0x12
#define INQUIRY_CMDLEN 6
int emc_clariion_prio(const char *dev)
{
unsigned char sense_buffer[256];
unsigned char sb[128];
unsigned char inqCmdBlk[INQUIRY_CMDLEN] = {INQUIRY_CMD, 1, 0xC0, 0,
sizeof(sb), 0};
struct sg_io_hdr io_hdr;
int ret = 0;
int fd;
fd = open(dev, O_RDWR|O_NONBLOCK);
if (fd <= 0) {
fprintf(stderr, "Opening the device failed.\n");
goto out;
}
memset(&io_hdr, 0, sizeof (struct sg_io_hdr));
io_hdr.interface_id = 'S';
io_hdr.cmd_len = sizeof (inqCmdBlk);
io_hdr.mx_sb_len = sizeof (sb);
io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
io_hdr.dxfer_len = sizeof (sense_buffer);
io_hdr.dxferp = sense_buffer;
io_hdr.cmdp = inqCmdBlk;
io_hdr.sbp = sb;
io_hdr.timeout = 60000;
io_hdr.pack_id = 0;
if (ioctl(fd, SG_IO, &io_hdr) < 0) {
fprintf(stderr, "sending query command failed\n");
goto out;
}
if (io_hdr.info & SG_INFO_OK_MASK) {
fprintf(stderr, "query command indicates error");
goto out;
}
close(fd);
if (/* Verify the code page - right page & revision */
sense_buffer[1] != 0xc0 || sense_buffer[9] != 0x00) {
fprintf(stderr, "Path unit report page in unknown format");
goto out;
}
if ( /* Effective initiator type */
sense_buffer[27] != 0x03
/* Failover mode should be set to 1 */
|| (sense_buffer[28] & 0x07) != 0x04
/* Arraycommpath should be set to 1 */
|| (sense_buffer[30] & 0x04) != 0x04) {
fprintf(stderr, "Path not correctly configured for failover");
}
if ( /* LUN operations should indicate normal operations */
sense_buffer[48] != 0x00) {
fprintf(stderr, "Path not available for normal operations");
}
/* Is the default owner equal to this path? */
/* Note this will switch to the default priority group, even if
* it is not the currently active one. */
ret = (sense_buffer[5] == sense_buffer[8]) ? 1 : 0;
out:
return(ret);
}
int
main (int argc, char **argv)
{
int prio;
if (argc != 2) {
fprintf(stderr, "Arguments wrong!\n");
prio = 0;
} else
prio = emc_clariion_prio(argv[1]);
printf("%d\n", prio);
exit(0);
}
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