--- /dev/null
+/*
+ * dasd.c
+ *
+ * IBM DASD partition table handling.
+ *
+ * Mostly taken from drivers/s390/block/dasd.c
+ *
+ * Copyright (c) 2005, Hannes Reinecke, SUSE Linux Products GmbH
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <linux/hdreg.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <libdevmapper.h>
+#include "devmapper.h"
+#include "kpartx.h"
+#include "byteorder.h"
+#include "dasd.h"
+
+/*
+ */
+int
+read_dasd_pt(int fd, struct slice all, struct slice *sp, int ns)
+{
+ int retval = -1;
+ int blocksize, offset, size;
+ long disksize;
+ dasd_information_t info;
+ struct hd_geometry geo;
+ char type[5] = {0,};
+ char name[7] = {0,};
+ unsigned char *label_raw;
+ volume_label_t vlabel;
+ unsigned char *data = NULL;
+ unsigned int blk;
+ int fd_dasd = -1;
+ struct stat sbuf;
+ dev_t dev;
+ char *devname;
+ char pathname[256];
+
+ if (fd < 0) {
+ return -1;
+ }
+
+ if (fstat(fd, &sbuf) == -1) {
+ return -1;
+ }
+
+ devname = dm_mapname(major(sbuf.st_rdev), minor(sbuf.st_rdev));
+
+ if (devname != NULL) {
+ /* We were passed a handle to a dm device.
+ * Get the first target and operate on that instead.
+ */
+ if (!(dev = dm_get_first_dep(devname))) {
+ free(devname);
+ return -1;
+ }
+ free(devname);
+
+ if ((unsigned int)major(dev) != 94) {
+ /* Not a DASD */
+ return -1;
+ }
+
+ /*
+ * Hard to believe, but there's no simple way to translate
+ * major/minor into an openable device file, so we have
+ * to create one for ourselves.
+ */
+
+ sprintf(pathname, "/dev/.kpartx-node-%u-%u",
+ (unsigned int)major(dev), (unsigned int)minor(dev));
+ if ((fd_dasd = open(pathname, O_RDONLY)) == -1) {
+ /* Devicenode does not exist. Try to create one */
+ if (mknod(pathname, 0600 | S_IFBLK, dev) == -1) {
+ /* Couldn't create a device node */
+ return -1;
+ }
+ fd_dasd = open(pathname, O_RDONLY);
+ /*
+ * The file will vanish when the last process (we)
+ * has ceased to access it.
+ */
+ unlink(pathname);
+ }
+ if (!fd_dasd) {
+ /* Couldn't open the device */
+ return -1;
+ }
+ } else {
+ fd_dasd = fd;
+ }
+
+ if (ioctl(fd_dasd, BIODASDINFO, (unsigned long)&info) != 0) {
+ goto out;
+ }
+
+ if (ioctl(fd_dasd, HDIO_GETGEO, (unsigned long)&geo) != 0) {
+ goto out;
+ }
+
+ if (ioctl(fd_dasd, BLKGETSIZE, &disksize) != 0)
+ goto out;
+
+ if (ioctl(fd_dasd, BLKSSZGET, &blocksize) != 0)
+ goto out;
+
+ if (blocksize < 512 || blocksize > 4096)
+ goto out;
+
+ /*
+ * Get volume label, extract name and type.
+ */
+
+ if (!(data = (unsigned char *)malloc(blocksize)))
+ goto out;
+
+
+ if (lseek(fd_dasd, info.label_block * blocksize, SEEK_SET) == -1)
+ goto out;
+ if (read(fd_dasd, data, blocksize) == -1) {
+ perror("read");
+ goto out;
+ }
+ vtoc_ebcdic_dec(data, type, 4);
+
+ if ((!info.FBA_layout) && (!strcmp(info.type, "ECKD")))
+ label_raw = &data[8];
+ else
+ label_raw = &data[4];
+
+ name[6] = '\0';
+ vtoc_ebcdic_dec(label_raw, name, 6);
+
+ memcpy (&vlabel, data, sizeof(volume_label_t));
+
+ /*
+ * Three different types: CMS1, VOL1 and LNX1/unlabeled
+ */
+ if (strncmp(type, "CMS1", 4) == 0) {
+ /*
+ * VM style CMS1 labeled disk
+ */
+ int *label = (int *) &vlabel;
+
+ if (label[13] != 0) {
+ /* disk is reserved minidisk */
+ blocksize = label[3];
+ offset = label[13];
+ size = (label[7] - 1)*(blocksize >> 9);
+ } else {
+ offset = (info.label_block + 1) * (blocksize >> 9);
+ size = disksize - offset;
+ }
+ sp[0].start = offset * (blocksize >> 9);
+ sp[0].size = size - offset * (blocksize >> 9);
+ retval = 1;
+ } else if ((strncmp(type, "VOL1", 4) == 0) &&
+ (!info.FBA_layout) && (!strcmp(info.type, "ECKD"))) {
+ /*
+ * New style VOL1 labeled disk
+ */
+ int counter;
+
+ /* get block number and read then go through format1 labels */
+ blk = cchhb2blk(&vlabel.vtoc, &geo) + 1;
+ counter = 0;
+ if (lseek(fd_dasd, blk * blocksize, SEEK_SET) == -1)
+ goto out;
+
+ while (read(fd_dasd, data, blocksize) != -1) {
+ format1_label_t f1;
+
+ memcpy(&f1, data, sizeof(format1_label_t));
+
+ /* skip FMT4 / FMT5 / FMT7 labels */
+ if (EBCtoASC[f1.DS1FMTID] == '4'
+ || EBCtoASC[f1.DS1FMTID] == '5'
+ || EBCtoASC[f1.DS1FMTID] == '7') {
+ blk++;
+ continue;
+ }
+
+ /* only FMT1 valid at this point */
+ if (EBCtoASC[f1.DS1FMTID] != '1')
+ break;
+
+ /* OK, we got valid partition data */
+ offset = cchh2blk(&f1.DS1EXT1.llimit, &geo);
+ size = cchh2blk(&f1.DS1EXT1.ulimit, &geo) -
+ offset + geo.sectors;
+ sp[counter].start = offset * (blocksize >> 9);
+ sp[counter].size = size * (blocksize >> 9);
+ counter++;
+ blk++;
+ }
+ retval = counter;
+ } else {
+ /*
+ * Old style LNX1 or unlabeled disk
+ */
+ offset = (info.label_block + 1) * (blocksize >> 9);
+ size = disksize - offset;
+ sp[0].start = offset * (blocksize >> 9);
+ sp[0].size = size - offset * (blocksize >> 9);
+ retval = 1;
+ }
+
+ out:
+ if (data != NULL)
+ free(data);
+ if (fd_dasd != -1 && fd_dasd != fd)
+ close(fd_dasd);
+ return retval;
+}
--- /dev/null
+/*
+ * dasd.h
+ *
+ * IBM DASD partition table handling.
+ *
+ * Mostly taken from drivers/s390/block/dasd.c
+ *
+ * Copyright (c) 2005, Hannes Reinecke, SUSE Linux Products GmbH
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#ifndef _DASD_H
+#define _DASD_H
+
+typedef struct ttr
+{
+ uint16_t tt;
+ uint8_t r;
+} __attribute__ ((packed)) ttr_t;
+
+typedef struct cchhb
+{
+ uint16_t cc;
+ uint16_t hh;
+ uint8_t b;
+} __attribute__ ((packed)) cchhb_t;
+
+typedef struct cchh
+{
+ uint16_t cc;
+ uint16_t hh;
+} __attribute__ ((packed)) cchh_t;
+
+typedef struct labeldate
+{
+ uint8_t year;
+ uint16_t day;
+} __attribute__ ((packed)) labeldate_t;
+
+
+typedef struct volume_label
+{
+ char volkey[4]; /* volume key = volume label */
+ char vollbl[4]; /* volume label */
+ char volid[6]; /* volume identifier */
+ uint8_t security; /* security byte */
+ cchhb_t vtoc; /* VTOC address */
+ char res1[5]; /* reserved */
+ char cisize[4]; /* CI-size for FBA,... */
+ /* ...blanks for CKD */
+ char blkperci[4]; /* no of blocks per CI (FBA), blanks for CKD */
+ char labperci[4]; /* no of labels per CI (FBA), blanks for CKD */
+ char res2[4]; /* reserved */
+ char lvtoc[14]; /* owner code for LVTOC */
+ char res3[29]; /* reserved */
+} __attribute__ ((packed)) volume_label_t;
+
+
+typedef struct extent
+{
+ uint8_t typeind; /* extent type indicator */
+ uint8_t seqno; /* extent sequence number */
+ cchh_t llimit; /* starting point of this extent */
+ cchh_t ulimit; /* ending point of this extent */
+} __attribute__ ((packed)) extent_t;
+
+
+typedef struct dev_const
+{
+ uint16_t DS4DSCYL; /* number of logical cyls */
+ uint16_t DS4DSTRK; /* number of tracks in a logical cylinder */
+ uint16_t DS4DEVTK; /* device track length */
+ uint8_t DS4DEVI; /* non-last keyed record overhead */
+ uint8_t DS4DEVL; /* last keyed record overhead */
+ uint8_t DS4DEVK; /* non-keyed record overhead differential */
+ uint8_t DS4DEVFG; /* flag byte */
+ uint16_t DS4DEVTL; /* device tolerance */
+ uint8_t DS4DEVDT; /* number of DSCB's per track */
+ uint8_t DS4DEVDB; /* number of directory blocks per track */
+} __attribute__ ((packed)) dev_const_t;
+
+
+typedef struct format1_label
+{
+ char DS1DSNAM[44]; /* data set name */
+ uint8_t DS1FMTID; /* format identifier */
+ char DS1DSSN[6]; /* data set serial number */
+ uint16_t DS1VOLSQ; /* volume sequence number */
+ labeldate_t DS1CREDT; /* creation date: ydd */
+ labeldate_t DS1EXPDT; /* expiration date */
+ uint8_t DS1NOEPV; /* number of extents on volume */
+ uint8_t DS1NOBDB; /* no. of bytes used in last direction blk */
+ uint8_t DS1FLAG1; /* flag 1 */
+ char DS1SYSCD[13]; /* system code */
+ labeldate_t DS1REFD; /* date last referenced */
+ uint8_t DS1SMSFG; /* system managed storage indicators */
+ uint8_t DS1SCXTF; /* sec. space extension flag byte */
+ uint16_t DS1SCXTV; /* secondary space extension value */
+ uint8_t DS1DSRG1; /* data set organisation byte 1 */
+ uint8_t DS1DSRG2; /* data set organisation byte 2 */
+ uint8_t DS1RECFM; /* record format */
+ uint8_t DS1OPTCD; /* option code */
+ uint16_t DS1BLKL; /* block length */
+ uint16_t DS1LRECL; /* record length */
+ uint8_t DS1KEYL; /* key length */
+ uint16_t DS1RKP; /* relative key position */
+ uint8_t DS1DSIND; /* data set indicators */
+ uint8_t DS1SCAL1; /* secondary allocation flag byte */
+ char DS1SCAL3[3]; /* secondary allocation quantity */
+ ttr_t DS1LSTAR; /* last used track and block on track */
+ uint16_t DS1TRBAL; /* space remaining on last used track */
+ uint16_t res1; /* reserved */
+ extent_t DS1EXT1; /* first extent description */
+ extent_t DS1EXT2; /* second extent description */
+ extent_t DS1EXT3; /* third extent description */
+ cchhb_t DS1PTRDS; /* possible pointer to f2 or f3 DSCB */
+} __attribute__ ((packed)) format1_label_t;
+
+
+/*
+ * 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 BLKGETSIZE _IO(0x12,96)
+#define BLKSSZGET _IO(0x12,104)
+
+/*
+ * 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 inline 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])];
+}
+
+/*
+ * compute the block number from a
+ * cyl-cyl-head-head structure
+ */
+static inline int
+cchh2blk (cchh_t *ptr, struct hd_geometry *geo) {
+ return ptr->cc * geo->heads * geo->sectors +
+ ptr->hh * geo->sectors;
+}
+
+
+/*
+ * compute the block number from a
+ * cyl-cyl-head-head-block structure
+ */
+static inline int
+cchhb2blk (cchhb_t *ptr, struct hd_geometry *geo) {
+ return ptr->cc * geo->heads * geo->sectors +
+ ptr->hh * geo->sectors +
+ ptr->b;
+}
+
+#endif /* _DASD_H */
projects / platform / upstream / multipath-tools.git / commitdiff