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/*
* dasdlabel - read label from s390 block device
*
* Copyright (C) 2004 Arnd Bergmann <arnd@arndb.de>
*
* 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 version 2 of the License.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include "../../logging.h"
#include "../../udev_utils.h"
#ifdef USE_LOG
void log_message(int priority, const char *format, ...)
{
va_list args;
static int udev_log = -1;
if (udev_log == -1) {
const char *value;
value = getenv("UDEV_LOG");
if (value)
udev_log = log_priority(value);
else
udev_log = LOG_ERR;
}
if (priority > udev_log)
return;
va_start(args, format);
vsyslog(priority, format, args);
va_end(args);
}
#endif
/*
* Only compile this on S/390. Doesn't make any sense
* for other architectures.
*/
static unsigned char EBCtoASC[256] =
{
/* 0x00 NUL SOH STX ETX *SEL HT *RNL DEL */
0x00, 0x01, 0x02, 0x03, 0x07, 0x09, 0x07, 0x7F,
/* 0x08 -GE -SPS -RPT VT FF CR SO SI */
0x07, 0x07, 0x07, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
/* 0x10 DLE DC1 DC2 DC3 -RES -NL BS -POC
-ENP ->LF */
0x10, 0x11, 0x12, 0x13, 0x07, 0x0A, 0x08, 0x07,
/* 0x18 CAN EM -UBS -CU1 -IFS -IGS -IRS -ITB
-IUS */
0x18, 0x19, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
/* 0x20 -DS -SOS FS -WUS -BYP LF ETB ESC
-INP */
0x07, 0x07, 0x1C, 0x07, 0x07, 0x0A, 0x17, 0x1B,
/* 0x28 -SA -SFE -SM -CSP -MFA ENQ ACK BEL
-SW */
0x07, 0x07, 0x07, 0x07, 0x07, 0x05, 0x06, 0x07,
/* 0x30 ---- ---- SYN -IR -PP -TRN -NBS EOT */
0x07, 0x07, 0x16, 0x07, 0x07, 0x07, 0x07, 0x04,
/* 0x38 -SBS -IT -RFF -CU3 DC4 NAK ---- SUB */
0x07, 0x07, 0x07, 0x07, 0x14, 0x15, 0x07, 0x1A,
/* 0x40 SP RSP ä ---- */
0x20, 0xFF, 0x83, 0x84, 0x85, 0xA0, 0x07, 0x86,
/* 0x48 . < ( + | */
0x87, 0xA4, 0x9B, 0x2E, 0x3C, 0x28, 0x2B, 0x7C,
/* 0x50 & ---- */
0x26, 0x82, 0x88, 0x89, 0x8A, 0xA1, 0x8C, 0x07,
/* 0x58 ß ! $ * ) ; */
0x8D, 0xE1, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0xAA,
/* 0x60 - / ---- Ä ---- ---- ---- */
0x2D, 0x2F, 0x07, 0x8E, 0x07, 0x07, 0x07, 0x8F,
/* 0x68 ---- , % _ > ? */
0x80, 0xA5, 0x07, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
/* 0x70 --- ---- ---- ---- ---- ---- ---- */
0x07, 0x90, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
/* 0x78 * ` : # @ ' = " */
0x70, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
/* 0x80 * a b c d e f g */
0x07, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
/* 0x88 h i ---- ---- ---- */
0x68, 0x69, 0xAE, 0xAF, 0x07, 0x07, 0x07, 0xF1,
/* 0x90 ° j k l m n o p */
0xF8, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
/* 0x98 q r ---- ---- */
0x71, 0x72, 0xA6, 0xA7, 0x91, 0x07, 0x92, 0x07,
/* 0xA0 ~ s t u v w x */
0xE6, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
/* 0xA8 y z ---- ---- ---- ---- */
0x79, 0x7A, 0xAD, 0xAB, 0x07, 0x07, 0x07, 0x07,
/* 0xB0 ^ ---- § ---- */
0x5E, 0x9C, 0x9D, 0xFA, 0x07, 0x07, 0x07, 0xAC,
/* 0xB8 ---- [ ] ---- ---- ---- ---- */
0xAB, 0x07, 0x5B, 0x5D, 0x07, 0x07, 0x07, 0x07,
/* 0xC0 { A B C D E F G */
0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
/* 0xC8 H I ---- ö ---- */
0x48, 0x49, 0x07, 0x93, 0x94, 0x95, 0xA2, 0x07,
/* 0xD0 } J K L M N O P */
0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
/* 0xD8 Q R ---- ü */
0x51, 0x52, 0x07, 0x96, 0x81, 0x97, 0xA3, 0x98,
/* 0xE0 \ S T U V W X */
0x5C, 0xF6, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
/* 0xE8 Y Z ---- Ö ---- ---- ---- */
0x59, 0x5A, 0xFD, 0x07, 0x99, 0x07, 0x07, 0x07,
/* 0xF0 0 1 2 3 4 5 6 7 */
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
/* 0xF8 8 9 ---- ---- Ü ---- ---- ---- */
0x38, 0x39, 0x07, 0x07, 0x9A, 0x07, 0x07, 0x07
};
static void vtoc_ebcdic_dec (const unsigned char *source, unsigned char *target, int l)
{
int i;
for (i = 0; i < l; i++)
target[i]=(char)EBCtoASC[(unsigned char)(source[i])];
}
/*
* struct dasd_information_t
* represents any data about the data, which is visible to userspace
*/
typedef struct dasd_information_t {
unsigned int devno; /* S/390 devno */
unsigned int real_devno; /* for aliases */
unsigned int schid; /* S/390 subchannel identifier */
unsigned int cu_type : 16; /* from SenseID */
unsigned int cu_model : 8; /* from SenseID */
unsigned int dev_type : 16; /* from SenseID */
unsigned int dev_model : 8; /* from SenseID */
unsigned int open_count;
unsigned int req_queue_len;
unsigned int chanq_len; /* length of chanq */
char type[4]; /* from discipline.name, 'none' for unknown */
unsigned int status; /* current device level */
unsigned int label_block; /* where to find the VOLSER */
unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
unsigned int characteristics_size;
unsigned int confdata_size;
char characteristics[64]; /* from read_device_characteristics */
char configuration_data[256]; /* from read_configuration_data */
} dasd_information_t;
#define DASD_IOCTL_LETTER 'D'
#define BIODASDINFO _IOR(DASD_IOCTL_LETTER,1,dasd_information_t)
#define BLKSSZGET _IO(0x12,104)
unsigned char serial[8];
static int dasd_id(int fd)
{
int blocksize;
dasd_information_t info;
unsigned char *data;
unsigned char *label_raw;
if (ioctl(fd, BIODASDINFO, &info) != 0) {
dbg("not a dasd");
return -1;
}
if (ioctl(fd, BLKSSZGET, &blocksize) != 0) {
err("failed to get blocksize");
return -1;
}
if (lseek(fd,info.label_block * blocksize, SEEK_SET) == -1) {
err("seek failed on dasd");
return -1;
}
data = malloc(blocksize);
if (data == NULL)
return -1;
if (read(fd, data, blocksize) == -1) {
err("read disklabel failed");
free(data);
return -1;
}
if ((!info.FBA_layout) && (!strcmp(info.type, "ECKD")))
label_raw = &data[8];
else
label_raw = &data[4];
serial[6] = '\0';
vtoc_ebcdic_dec(label_raw, serial, 6);
free(data);
return 0;
}
int main(int argc, char *argv[])
{
const char *node = NULL;
int i;
int export = 0;
int fd;
int rc = 0;
logging_init("dasd_id");
for (i = 1; i < argc; i++) {
char *arg = argv[i];
if (strcmp(arg, "--export") == 0) {
export = 1;
} else
node = arg;
}
if (!node) {
err("no node specified");
rc = 1;
goto exit;
}
fd = open(node, O_RDONLY);
if (fd < 0) {
err("unable to open '%s'", node);
rc = 1;
goto exit;
}
if (dasd_id(fd) < 0) {
err("dasd_id failed: %s", strerror(errno));
rc = 1;
}
if (export) {
printf("ID_TYPE=disk\n");
printf("ID_SERIAL=%s\n",serial);
printf("ID_BUS=ccw\n");
} else
printf("%s\n", serial);
close(fd);
exit:
logging_close();
return rc;
}
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