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#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sg_include.h>
#include <debug.h>
#include <prio.h>
#define INQUIRY_CMD 0x12
#define INQUIRY_CMDLEN 6
#define pp_emc_log(prio, msg) condlog(prio, "%s: emc prio: " msg, dev)
int emc_clariion_prio(const char *dev, int fd)
{
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;
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) {
pp_emc_log(0, "sending query command failed");
goto out;
}
if (io_hdr.info & SG_INFO_OK_MASK) {
pp_emc_log(0, "query command indicates error");
goto out;
}
if (/* Verify the code page - right page & revision */
sense_buffer[1] != 0xc0 || sense_buffer[9] != 0x00) {
pp_emc_log(0, "path unit report page in unknown format");
goto out;
}
if ( /* Effective initiator type */
sense_buffer[27] != 0x03
/*
* Failover mode should be set to 1 (PNR failover mode)
* or 4 (ALUA failover mode).
*/
|| (((sense_buffer[28] & 0x07) != 0x04) &&
((sense_buffer[28] & 0x07) != 0x06))
/* Arraycommpath should be set to 1 */
|| (sense_buffer[30] & 0x04) != 0x04) {
pp_emc_log(0, "path not correctly configured for failover");
}
if ( /* LUN operations should indicate normal operations */
sense_buffer[48] != 0x00) {
pp_emc_log(0, "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 getprio (struct path * pp, char * args)
{
return emc_clariion_prio(pp->dev, pp->fd);
}
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