cde5a756ce
Here is a update to extras/volume_id/* o The device is now specified by the DEVPATH in the environment, it's no longer needed to pass the major/minor to the callout. o leading spaces and slashes are now removed from the returned string and spaces are replaced by underscore, to not to confuse udev. o Arnd Bergmann <arnd@arndb.de> provided the code to recognize s390 dasd disk labels. The -d switch tries to read the main block device instead of the partition.
179 lines
6.8 KiB
C
179 lines
6.8 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* 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.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*/
|
|
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#include "dasdlabel.h"
|
|
|
|
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 (unsigned char *source, unsigned char *target, int l)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < l; i++)
|
|
target[i]=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 _IOC_NRBITS 8
|
|
#define _IOC_TYPEBITS 8
|
|
#define _IOC_SIZEBITS 14
|
|
#define _IOC_DIRBITS 2
|
|
#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
|
|
#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
|
|
#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
|
|
#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
|
|
#define _IOC_NRSHIFT 0
|
|
#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
|
|
#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
|
|
#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
|
|
#define DASD_IOCTL_LETTER 'D'
|
|
|
|
#define BIODASDINFO _IOR(DASD_IOCTL_LETTER,1,dasd_information_t)
|
|
#define BLKSSZGET _IO(0x12,104)
|
|
|
|
int probe_ibm_partition(int fd, char *out)
|
|
{
|
|
int blocksize;
|
|
dasd_information_t info;
|
|
char name[7] = {0,};
|
|
unsigned char data[16];
|
|
|
|
if (ioctl(fd, BIODASDINFO, (unsigned long)&info) != 0)
|
|
return -1;
|
|
|
|
if (ioctl(fd, BLKSSZGET, (unsigned long)&blocksize))
|
|
return -1;
|
|
|
|
lseek(fd, info.label_block * blocksize, SEEK_SET);
|
|
if (read(fd, &data, 16) != 16)
|
|
return -1;
|
|
|
|
if ((!info.FBA_layout) && (!strcmp(info.type, "ECKD")))
|
|
strncpy(name, data + 8, 6);
|
|
else
|
|
strncpy(name, data + 4, 6);
|
|
|
|
vtoc_ebcdic_dec(name, out, 6);
|
|
|
|
return 0;
|
|
}
|