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.
35 #include <sys/ioctl.h>
36 #include <asm/types.h>
38 #include "../../logging.h"
39 #include "../../udev_utils.h"
42 void log_message(int priority, const char *format, ...)
45 static int udev_log = -1;
50 value = getenv("UDEV_LOG");
52 udev_log = log_priority(value);
57 if (priority > udev_log)
60 va_start(args, format);
61 vsyslog(priority, format, args);
67 * Only compile this on S/390. Doesn't make any sense
68 * for other architectures.
71 static unsigned char EBCtoASC[256] =
73 /* 0x00 NUL SOH STX ETX *SEL HT *RNL DEL */
74 0x00, 0x01, 0x02, 0x03, 0x07, 0x09, 0x07, 0x7F,
75 /* 0x08 -GE -SPS -RPT VT FF CR SO SI */
76 0x07, 0x07, 0x07, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
77 /* 0x10 DLE DC1 DC2 DC3 -RES -NL BS -POC
79 0x10, 0x11, 0x12, 0x13, 0x07, 0x0A, 0x08, 0x07,
80 /* 0x18 CAN EM -UBS -CU1 -IFS -IGS -IRS -ITB
82 0x18, 0x19, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
83 /* 0x20 -DS -SOS FS -WUS -BYP LF ETB ESC
85 0x07, 0x07, 0x1C, 0x07, 0x07, 0x0A, 0x17, 0x1B,
86 /* 0x28 -SA -SFE -SM -CSP -MFA ENQ ACK BEL
88 0x07, 0x07, 0x07, 0x07, 0x07, 0x05, 0x06, 0x07,
89 /* 0x30 ---- ---- SYN -IR -PP -TRN -NBS EOT */
90 0x07, 0x07, 0x16, 0x07, 0x07, 0x07, 0x07, 0x04,
91 /* 0x38 -SBS -IT -RFF -CU3 DC4 NAK ---- SUB */
92 0x07, 0x07, 0x07, 0x07, 0x14, 0x15, 0x07, 0x1A,
93 /* 0x40 SP RSP ä ---- */
94 0x20, 0xFF, 0x83, 0x84, 0x85, 0xA0, 0x07, 0x86,
96 0x87, 0xA4, 0x9B, 0x2E, 0x3C, 0x28, 0x2B, 0x7C,
98 0x26, 0x82, 0x88, 0x89, 0x8A, 0xA1, 0x8C, 0x07,
99 /* 0x58 ß ! $ * ) ; */
100 0x8D, 0xE1, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0xAA,
101 /* 0x60 - / ---- Ä ---- ---- ---- */
102 0x2D, 0x2F, 0x07, 0x8E, 0x07, 0x07, 0x07, 0x8F,
103 /* 0x68 ---- , % _ > ? */
104 0x80, 0xA5, 0x07, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
105 /* 0x70 --- ---- ---- ---- ---- ---- ---- */
106 0x07, 0x90, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
107 /* 0x78 * ` : # @ ' = " */
108 0x70, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
109 /* 0x80 * a b c d e f g */
110 0x07, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
111 /* 0x88 h i ---- ---- ---- */
112 0x68, 0x69, 0xAE, 0xAF, 0x07, 0x07, 0x07, 0xF1,
113 /* 0x90 ° j k l m n o p */
114 0xF8, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
115 /* 0x98 q r ---- ---- */
116 0x71, 0x72, 0xA6, 0xA7, 0x91, 0x07, 0x92, 0x07,
117 /* 0xA0 ~ s t u v w x */
118 0xE6, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
119 /* 0xA8 y z ---- ---- ---- ---- */
120 0x79, 0x7A, 0xAD, 0xAB, 0x07, 0x07, 0x07, 0x07,
121 /* 0xB0 ^ ---- § ---- */
122 0x5E, 0x9C, 0x9D, 0xFA, 0x07, 0x07, 0x07, 0xAC,
123 /* 0xB8 ---- [ ] ---- ---- ---- ---- */
124 0xAB, 0x07, 0x5B, 0x5D, 0x07, 0x07, 0x07, 0x07,
125 /* 0xC0 { A B C D E F G */
126 0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
127 /* 0xC8 H I ---- ö ---- */
128 0x48, 0x49, 0x07, 0x93, 0x94, 0x95, 0xA2, 0x07,
129 /* 0xD0 } J K L M N O P */
130 0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
131 /* 0xD8 Q R ---- ü */
132 0x51, 0x52, 0x07, 0x96, 0x81, 0x97, 0xA3, 0x98,
133 /* 0xE0 \ S T U V W X */
134 0x5C, 0xF6, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
135 /* 0xE8 Y Z ---- Ö ---- ---- ---- */
136 0x59, 0x5A, 0xFD, 0x07, 0x99, 0x07, 0x07, 0x07,
137 /* 0xF0 0 1 2 3 4 5 6 7 */
138 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
139 /* 0xF8 8 9 ---- ---- Ü ---- ---- ---- */
140 0x38, 0x39, 0x07, 0x07, 0x9A, 0x07, 0x07, 0x07
143 static void vtoc_ebcdic_dec (const unsigned char *source, char *target, int l)
147 for (i = 0; i < l; i++)
148 target[i]=(char)EBCtoASC[(unsigned char)(source[i])];
152 * struct dasd_information_t
153 * represents any data about the data, which is visible to userspace
155 typedef struct dasd_information_t {
156 unsigned int devno; /* S/390 devno */
157 unsigned int real_devno; /* for aliases */
158 unsigned int schid; /* S/390 subchannel identifier */
159 unsigned int cu_type : 16; /* from SenseID */
160 unsigned int cu_model : 8; /* from SenseID */
161 unsigned int dev_type : 16; /* from SenseID */
162 unsigned int dev_model : 8; /* from SenseID */
163 unsigned int open_count;
164 unsigned int req_queue_len;
165 unsigned int chanq_len; /* length of chanq */
166 char type[4]; /* from discipline.name, 'none' for unknown */
167 unsigned int status; /* current device level */
168 unsigned int label_block; /* where to find the VOLSER */
169 unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
170 unsigned int characteristics_size;
171 unsigned int confdata_size;
172 char characteristics[64]; /* from read_device_characteristics */
173 char configuration_data[256]; /* from read_configuration_data */
174 } dasd_information_t;
176 #define DASD_IOCTL_LETTER 'D'
177 #define BIODASDINFO _IOR(DASD_IOCTL_LETTER,1,dasd_information_t)
178 #define BLKSSZGET _IO(0x12,104)
180 unsigned char serial[8];
182 static int dasd_id(int fd)
185 dasd_information_t info;
189 if (ioctl(fd, BIODASDINFO, &info) != 0) {
194 if (ioctl(fd, BLKSSZGET, &blocksize) != 0) {
195 err("failed to get blocksize");
199 if (lseek(fd,info.label_block * blocksize, SEEK_SET) == -1) {
200 err("seek failed on dasd");
204 data = malloc(blocksize);
208 if (read(fd, data, blocksize) == -1) {
209 err("read disklabel failed");
214 if ((!info.FBA_layout) && (!strcmp(info.type, "ECKD")))
215 label_raw = &data[8];
217 label_raw = &data[4];
220 vtoc_ebcdic_dec(label_raw, serial, 6);
226 int main(int argc, char *argv[])
228 const char *node = NULL;
234 logging_init("dasd_id");
236 for (i = 1; i < argc; i++) {
239 if (strcmp(arg, "--export") == 0) {
245 err("no node specified");
250 fd = open(node, O_RDONLY);
252 err("unable to open '%s'", node);
257 if (dasd_id(fd) < 0) {
258 err("dasd_id failed: %s", strerror(errno));
263 printf("ID_TYPE=disk\n");
264 printf("ID_SERIAL=%s\n",serial);
265 printf("ID_BUS=ccw\n");
267 printf("%s\n", serial);