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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sysfs/libsysfs.h>
#include "devinfo.h"
#include "sg_include.h"
#define FILE_NAME_SIZE 255
void
basename(char * str1, char * str2)
{
char *p = str1 + (strlen(str1) - 1);
while (*--p != '/')
continue;
strcpy(str2, ++p);
}
static int
do_inq(int sg_fd, int cmddt, int evpd, unsigned int pg_op,
void *resp, int mx_resp_len, int noisy)
{
unsigned char inqCmdBlk[INQUIRY_CMDLEN] =
{ INQUIRY_CMD, 0, 0, 0, 0, 0 };
unsigned char sense_b[SENSE_BUFF_LEN];
struct sg_io_hdr io_hdr;
if (cmddt)
inqCmdBlk[1] |= 2;
if (evpd)
inqCmdBlk[1] |= 1;
inqCmdBlk[2] = (unsigned char) pg_op;
inqCmdBlk[4] = (unsigned char) mx_resp_len;
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 (sense_b);
io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
io_hdr.dxfer_len = mx_resp_len;
io_hdr.dxferp = resp;
io_hdr.cmdp = inqCmdBlk;
io_hdr.sbp = sense_b;
io_hdr.timeout = DEF_TIMEOUT;
if (ioctl(sg_fd, SG_IO, &io_hdr) < 0) {
perror("SG_IO (inquiry) error");
return -1;
}
/* treat SG_ERR here to get rid of sg_err.[ch] */
io_hdr.status &= 0x7e;
if ((0 == io_hdr.status) && (0 == io_hdr.host_status) &&
(0 == io_hdr.driver_status))
return 0;
if ((SCSI_CHECK_CONDITION == io_hdr.status) ||
(SCSI_COMMAND_TERMINATED == io_hdr.status) ||
(SG_ERR_DRIVER_SENSE == (0xf & io_hdr.driver_status))) {
if (io_hdr.sbp && (io_hdr.sb_len_wr > 2)) {
int sense_key;
unsigned char * sense_buffer = io_hdr.sbp;
if (sense_buffer[0] & 0x2)
sense_key = sense_buffer[1] & 0xf;
else
sense_key = sense_buffer[2] & 0xf;
if(RECOVERED_ERROR == sense_key)
return 0;
}
}
return -1;
}
int
get_serial (char * str, char * devname)
{
int fd;
int len;
char buff[MX_ALLOC_LEN + 1];
if ((fd = open(devname, O_RDONLY)) < 0)
return 0;
if (0 == do_inq(fd, 0, 1, 0x80, buff, MX_ALLOC_LEN, 0)) {
len = buff[3];
if (len > 0) {
memcpy(str, buff + 4, len);
buff[len] = '\0';
}
close(fd);
return 1;
}
close(fd);
return 0;
}
int
get_lun_strings(char * vendor_id, char * product_id, char * rev, char * devname)
{
int fd;
char buff[36];
char attr_path[FILE_NAME_SIZE];
char sysfs_path[FILE_NAME_SIZE];
char basedev[FILE_NAME_SIZE];
if (0 == sysfs_get_mnt_path(sysfs_path, FILE_NAME_SIZE)) {
/* sysfs style */
basename(devname, basedev);
sprintf(attr_path, "%s/block/%s/device/vendor",
sysfs_path, basedev);
if (0 > sysfs_read_attribute_value(attr_path,
vendor_id, 8)) return 0;
sprintf(attr_path, "%s/block/%s/device/model",
sysfs_path, basedev);
if (0 > sysfs_read_attribute_value(attr_path,
product_id, 16)) return 0;
sprintf(attr_path, "%s/block/%s/device/rev",
sysfs_path, basedev);
if (0 > sysfs_read_attribute_value(attr_path,
rev, 4)) return 0;
} else {
/* ioctl style */
if ((fd = open(devname, O_RDONLY)) < 0)
return 0;
if (0 != do_inq(fd, 0, 0, 0, buff, 36, 1))
return 0;
memcpy(vendor_id, &buff[8], 8);
memcpy(product_id, &buff[16], 16);
memcpy(rev, &buff[32], 4);
close(fd);
return 1;
}
return 0;
}
static void
sprint_wwid(char * buff, const char * str)
{
int i;
const char *p;
char *cursor;
unsigned char c;
p = str;
cursor = buff;
for (i = 0; i <= WWID_SIZE / 2 - 1; i++) {
c = *p++;
sprintf(cursor, "%.2x", (int) (unsigned char) c);
cursor += 2;
}
buff[WWID_SIZE - 1] = '\0';
}
/* get EVPD page 0x83 off 8 */
/* tested ok with StorageWorks */
int
get_evpd_wwid(char * devname, char * wwid)
{
int fd;
char buff[64];
if ((fd = open(devname, O_RDONLY)) < 0)
return 0;
if (0 == do_inq(fd, 0, 1, 0x83, buff, sizeof (buff), 1)) {
sprint_wwid(wwid, &buff[8]);
close(fd);
return 1; /* success */
}
close(fd);
return 0; /* not good */
}
long
get_disk_size (char * devname) {
long size;
int fd;
char attr_path[FILE_NAME_SIZE];
char sysfs_path[FILE_NAME_SIZE];
char buff[FILE_NAME_SIZE];
char basedev[FILE_NAME_SIZE];
if (0 == sysfs_get_mnt_path(sysfs_path, FILE_NAME_SIZE)) {
basename(devname, basedev);
sprintf(attr_path, "%s/block/%s/size",
sysfs_path, basedev);
if (0 > sysfs_read_attribute_value(attr_path, buff,
FILE_NAME_SIZE * sizeof(char)))
return -1;
size = atoi(buff);
return size;
} else {
if ((fd = open(devname, O_RDONLY)) < 0)
return -1;
if(!ioctl(fd, BLKGETSIZE, &size))
return size;
}
return -1;
}
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