2 * dasdlabel - read label from s390 block device
4 * Copyright (C) 2004 Arnd Bergmann <arnd@arndb.de>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation version 2 of the License.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 675 Mass Ave, Cambridge, MA 02139, USA.
34 #include <sys/ioctl.h>
35 #include <asm/types.h>
37 #include "volume_id.h"
42 static unsigned char EBCtoASC[256] =
44 /* 0x00 NUL SOH STX ETX *SEL HT *RNL DEL */
45 0x00, 0x01, 0x02, 0x03, 0x07, 0x09, 0x07, 0x7F,
46 /* 0x08 -GE -SPS -RPT VT FF CR SO SI */
47 0x07, 0x07, 0x07, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
48 /* 0x10 DLE DC1 DC2 DC3 -RES -NL BS -POC
50 0x10, 0x11, 0x12, 0x13, 0x07, 0x0A, 0x08, 0x07,
51 /* 0x18 CAN EM -UBS -CU1 -IFS -IGS -IRS -ITB
53 0x18, 0x19, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
54 /* 0x20 -DS -SOS FS -WUS -BYP LF ETB ESC
56 0x07, 0x07, 0x1C, 0x07, 0x07, 0x0A, 0x17, 0x1B,
57 /* 0x28 -SA -SFE -SM -CSP -MFA ENQ ACK BEL
59 0x07, 0x07, 0x07, 0x07, 0x07, 0x05, 0x06, 0x07,
60 /* 0x30 ---- ---- SYN -IR -PP -TRN -NBS EOT */
61 0x07, 0x07, 0x16, 0x07, 0x07, 0x07, 0x07, 0x04,
62 /* 0x38 -SBS -IT -RFF -CU3 DC4 NAK ---- SUB */
63 0x07, 0x07, 0x07, 0x07, 0x14, 0x15, 0x07, 0x1A,
64 /* 0x40 SP RSP ä ---- */
65 0x20, 0xFF, 0x83, 0x84, 0x85, 0xA0, 0x07, 0x86,
67 0x87, 0xA4, 0x9B, 0x2E, 0x3C, 0x28, 0x2B, 0x7C,
69 0x26, 0x82, 0x88, 0x89, 0x8A, 0xA1, 0x8C, 0x07,
70 /* 0x58 ß ! $ * ) ; */
71 0x8D, 0xE1, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0xAA,
72 /* 0x60 - / ---- Ä ---- ---- ---- */
73 0x2D, 0x2F, 0x07, 0x8E, 0x07, 0x07, 0x07, 0x8F,
74 /* 0x68 ---- , % _ > ? */
75 0x80, 0xA5, 0x07, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
76 /* 0x70 --- ---- ---- ---- ---- ---- ---- */
77 0x07, 0x90, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
78 /* 0x78 * ` : # @ ' = " */
79 0x70, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
80 /* 0x80 * a b c d e f g */
81 0x07, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
82 /* 0x88 h i ---- ---- ---- */
83 0x68, 0x69, 0xAE, 0xAF, 0x07, 0x07, 0x07, 0xF1,
84 /* 0x90 ° j k l m n o p */
85 0xF8, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
86 /* 0x98 q r ---- ---- */
87 0x71, 0x72, 0xA6, 0xA7, 0x91, 0x07, 0x92, 0x07,
88 /* 0xA0 ~ s t u v w x */
89 0xE6, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
90 /* 0xA8 y z ---- ---- ---- ---- */
91 0x79, 0x7A, 0xAD, 0xAB, 0x07, 0x07, 0x07, 0x07,
92 /* 0xB0 ^ ---- § ---- */
93 0x5E, 0x9C, 0x9D, 0xFA, 0x07, 0x07, 0x07, 0xAC,
94 /* 0xB8 ---- [ ] ---- ---- ---- ---- */
95 0xAB, 0x07, 0x5B, 0x5D, 0x07, 0x07, 0x07, 0x07,
96 /* 0xC0 { A B C D E F G */
97 0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
98 /* 0xC8 H I ---- ö ---- */
99 0x48, 0x49, 0x07, 0x93, 0x94, 0x95, 0xA2, 0x07,
100 /* 0xD0 } J K L M N O P */
101 0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
102 /* 0xD8 Q R ---- ü */
103 0x51, 0x52, 0x07, 0x96, 0x81, 0x97, 0xA3, 0x98,
104 /* 0xE0 \ S T U V W X */
105 0x5C, 0xF6, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
106 /* 0xE8 Y Z ---- Ö ---- ---- ---- */
107 0x59, 0x5A, 0xFD, 0x07, 0x99, 0x07, 0x07, 0x07,
108 /* 0xF0 0 1 2 3 4 5 6 7 */
109 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
110 /* 0xF8 8 9 ---- ---- Ü ---- ---- ---- */
111 0x38, 0x39, 0x07, 0x07, 0x9A, 0x07, 0x07, 0x07
114 static void vtoc_ebcdic_dec (const unsigned char *source, unsigned char *target, int l)
118 for (i = 0; i < l; i++)
119 target[i]=EBCtoASC[(unsigned char)(source[i])];
123 * struct dasd_information_t
124 * represents any data about the data, which is visible to userspace
126 typedef struct dasd_information_t {
127 unsigned int devno; /* S/390 devno */
128 unsigned int real_devno; /* for aliases */
129 unsigned int schid; /* S/390 subchannel identifier */
130 unsigned int cu_type : 16; /* from SenseID */
131 unsigned int cu_model : 8; /* from SenseID */
132 unsigned int dev_type : 16; /* from SenseID */
133 unsigned int dev_model : 8; /* from SenseID */
134 unsigned int open_count;
135 unsigned int req_queue_len;
136 unsigned int chanq_len; /* length of chanq */
137 char type[4]; /* from discipline.name, 'none' for unknown */
138 unsigned int status; /* current device level */
139 unsigned int label_block; /* where to find the VOLSER */
140 unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
141 unsigned int characteristics_size;
142 unsigned int confdata_size;
143 char characteristics[64]; /* from read_device_characteristics */
144 char configuration_data[256]; /* from read_configuration_data */
145 } dasd_information_t;
147 #define _IOC_NRBITS 8
148 #define _IOC_TYPEBITS 8
149 #define _IOC_SIZEBITS 14
150 #define _IOC_DIRBITS 2
151 #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
152 #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
153 #define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
154 #define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
155 #define _IOC_NRSHIFT 0
156 #define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
157 #define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
158 #define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
159 #define DASD_IOCTL_LETTER 'D'
161 #define BIODASDINFO _IOR(DASD_IOCTL_LETTER,1,dasd_information_t)
162 #define BLKSSZGET _IO(0x12,104)
164 int volume_id_probe_dasd(struct volume_id *id)
167 dasd_information_t info;
170 unsigned char name[7];
174 if (ioctl(id->fd, BIODASDINFO, &info) != 0)
177 if (ioctl(id->fd, BLKSSZGET, &blocksize) != 0)
180 data = volume_id_get_buffer(id, info.label_block * blocksize, 16);
184 if ((!info.FBA_layout) && (!strcmp(info.type, "ECKD")))
185 label_raw = &data[8];
187 label_raw = &data[4];
190 volume_id_set_usage(id, VOLUME_ID_DISKLABEL);
192 volume_id_set_label_raw(id, label_raw, 6);
193 vtoc_ebcdic_dec(label_raw, name, 6);
194 volume_id_set_label_string(id, name, 6);