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Diffstat (limited to 'extras/dasd_id/dasd_id.c')
-rw-r--r--extras/dasd_id/dasd_id.c273
1 files changed, 273 insertions, 0 deletions
diff --git a/extras/dasd_id/dasd_id.c b/extras/dasd_id/dasd_id.c
new file mode 100644
index 0000000000..5c2143f45d
--- /dev/null
+++ b/extras/dasd_id/dasd_id.c
@@ -0,0 +1,273 @@
+/*
+ * 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.
+ *
+ */
+
+#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 <asm/types.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, 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;
+ __u8 *data;
+ __u8 *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);
+ } else
+ printf("%s\n", serial);
+
+ close(fd);
+exit:
+ logging_close();
+ return rc;
+}
+
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