/* * dasdlabel - read label from s390 block device * * Copyright (C) 2004 Arnd Bergmann * * 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 #endif #include #include #include #include #include #include #include #include #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); printf("ID_BUS=ccw\n"); } else printf("%s\n", serial); close(fd); exit: logging_close(); return rc; }