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ckddasd64.c
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ckddasd64.c
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/* CKDDASD64.C (C) Copyright Roger Bowler, 1999-2012 */
/* ESA/390 CKD Direct Access Storage Device Handler */
/* */
/* Released under "The Q Public License Version 1" */
/* (http://www.hercules-390.org/herclic.html) as modifications to */
/* Hercules. */
/*-------------------------------------------------------------------*/
/* This module contains device handling functions for emulated */
/* count-key-data direct access storage devices. */
/*-------------------------------------------------------------------*/
/*-------------------------------------------------------------------*/
/* Reference information: */
/* GA32-0099 IBM 3990 Storage Control Reference (Models 1, 2, and 3) */
/* GA32-0274 IBM 3990,9390 Storage Control Reference */
/* GC26-7006 IBM RAMAC Array Subsystem Reference */
/*-------------------------------------------------------------------*/
/*-------------------------------------------------------------------*/
/* Additional credits: */
/* Write Update Key and Data CCW by Jan Jaeger */
/* Track overflow support added by Jay Maynard */
/* Track overflow fixes by Jay Maynard, suggested by Valery */
/* Pogonchenko */
/* Track overflow write fix by Roger Bowler, thanks to Valery */
/* Pogonchenko and Volker Bandke V1.71 16/01/2001 */
/*-------------------------------------------------------------------*/
#include "hstdinc.h"
#define _CKDDASD64_C_
#define _HDASD_DLL_
#include "hercules.h"
#include "devtype.h"
#include "sr.h"
#include "dasdblks.h"
#include "ccwarn.h"
#include "cckddasd.h"
/*-------------------------------------------------------------------*/
/* Initialize the device handler */
/*-------------------------------------------------------------------*/
int ckd64_dasd_init_handler ( DEVBLK *dev, int argc, char *argv[] )
{
int rc; /* Return code */
struct stat statbuf; /* File information */
CKD_DEVHDR devhdr; /* Device header */
CCKD64_DEVHDR cdevhdr; /* Compressed device header */
int i; /* Loop index */
BYTE fileseq; /* File sequence number */
char *sfxptr; /* -> Last char of file name */
char sfxchar; /* Last char of file name */
int heads; /* #of heads in CKD file */
int trksize; /* Track size of CKD file */
int trks; /* #of tracks in CKD file */
int cyls; /* #of cylinders in CKD file */
int highcyl; /* Highest cyl# in CKD file */
char *cu = NULL; /* Specified control unit */
int cckd=0; /* 1 if compressed CKD */
char filename[FILENAME_MAX+3]; /* work area for display */
BYTE serial[12+1] = {0}; /* Dasd serial number */
dev->rcd = &dasd_build_ckd_config_data;
/* For re-initialisation, close the existing file, if any */
if (dev->fd >= 0)
(dev->hnd->close)(dev);
if(!sscanf(dev->typname,"%hx",&(dev->devtype)))
dev->devtype = 0x3380;
/* The first argument is the file name */
if (argc == 0 || strlen(argv[0]) >= sizeof(dev->filename))
{
// "%1d:%04X CKD file: name missing or invalid filename length"
WRMSG( HHC00400, "E", LCSS_DEVNUM );
return -1;
}
/* reset excps count */
dev->excps = 0;
/* Save the file name in the device block */
hostpath(dev->filename, argv[0], sizeof(dev->filename));
if (strchr(dev->filename, SPACE) == NULL)
{
MSGBUF(filename, "%s", dev->filename);
}
else
{
MSGBUF(filename, "'%s'", dev->filename);
}
#if defined( OPTION_SHARED_DEVICES )
/* Device is shareable */
dev->shareable = 1;
#endif // defined( OPTION_SHARED_DEVICES )
/* Check for possible remote device */
if (stat(dev->filename, &statbuf) < 0)
{
rc = shared_ckd_init ( dev, argc, argv);
if (rc < 0)
{
// "%1d:%04X CKD file %s: open error: not found"
WRMSG( HHC00401, "E", LCSS_DEVNUM, filename );
return -1;
}
else
return rc;
}
/* No active track or cache entry */
dev->bufcur = dev->cache = -1;
/* Locate and save the last character of the file name */
sfxptr = strrchr (dev->filename, PATHSEPC);
if (sfxptr == NULL) sfxptr = dev->filename + 1;
sfxptr = strchr (sfxptr, '.');
if (sfxptr == NULL) sfxptr = dev->filename + strlen(dev->filename);
sfxptr--;
sfxchar = *sfxptr;
/* process the remaining arguments */
for (i = 1; i < argc; i++)
{
if (strcasecmp ("lazywrite", argv[i]) == 0)
{
dev->ckdnolazywr = 0;
continue;
}
if (strcasecmp ("nolazywrite", argv[i]) == 0)
{
dev->ckdnolazywr = 1;
continue;
}
if (strcasecmp ("fulltrackio", argv[i]) == 0 ||
strcasecmp ("fulltrkio", argv[i]) == 0 ||
strcasecmp ("ftio", argv[i]) == 0)
{
dev->ckdnolazywr = 0;
continue;
}
if (strcasecmp ("nofulltrackio", argv[i]) == 0 ||
strcasecmp ("nofulltrkio", argv[i]) == 0 ||
strcasecmp ("noftio", argv[i]) == 0)
{
dev->ckdnolazywr = 1;
continue;
}
if (strcasecmp ("readonly", argv[i]) == 0 ||
strcasecmp ("rdonly", argv[i]) == 0 ||
strcasecmp ("ro", argv[i]) == 0)
{
dev->ckdrdonly = 1;
continue;
}
if (strcasecmp ("fakewrite", argv[i]) == 0 ||
strcasecmp ("fakewrt", argv[i]) == 0 ||
strcasecmp ("fw", argv[i]) == 0)
{
dev->ckdfakewr = 1;
continue;
}
if (strlen (argv[i]) > 3 &&
memcmp ("sf=", argv[i], 3) == 0)
{
/* Parse the shadow file name parameter */
cckd_sf_parse_sfn( dev, argv[i]+3 );
continue;
}
if (strlen (argv[i]) > 3
&& memcmp("cu=", argv[i], 3) == 0)
{
cu = argv[i]+3;
continue;
}
if (strlen (argv[i]) > 4
&& memcmp("ser=", argv[i], 4) == 0)
{
if (1
&& is_numeric( argv[i]+4 )
&& strlen( argv[i]+4 ) == sizeof( dev->serial )
)
{
memcpy( serial, argv[i]+4, sizeof( dev->serial ));
continue;
}
}
// "%1d:%04X CKD file: parameter %s in argument %d is invalid"
WRMSG( HHC00402, "E", LCSS_DEVNUM, argv[i], i + 1 );
return -1;
}
/* Initialize the total tracks and cylinders */
dev->ckdtrks = 0;
dev->ckdcyls = 0;
/* Open all of the CKD image files which comprise this volume */
for (fileseq = 1;;)
{
/* Open the CKD image file */
dev->fd = HOPEN (dev->filename, dev->ckdrdonly ?
O_RDONLY|O_BINARY : O_RDWR|O_BINARY);
if (dev->fd < 0)
{ /* Try read-only if shadow file present */
if (!dev->ckdrdonly && dev->dasdsfn != NULL)
dev->fd = HOPEN (dev->filename, O_RDONLY|O_BINARY);
if (dev->fd < 0)
{
// "%1d:%04X CKD file %s: error in function %s: %s"
WRMSG( HHC00404, "E", LCSS_DEVNUM,
filename, "open()", strerror( errno ));
return -1;
}
}
/* If shadow file, only one base file is allowed */
if (fileseq > 1 && dev->dasdsfn != NULL)
{
// "%1d:%04X CKD file %s: only one base file is allowed"
WRMSG( HHC00405, "E", LCSS_DEVNUM, filename );
return -1;
}
/* Determine the device size */
rc = fstat (dev->fd, &statbuf);
if (rc < 0)
{
// "%1d:%04X CKD file %s: error in function %s: %s"
WRMSG( HHC00404, "E", LCSS_DEVNUM, filename, "fstat()", strerror( errno ));
return -1;
}
/* Read the device header */
rc = read (dev->fd, &devhdr, CKD_DEVHDR_SIZE);
if (rc < (int)CKD_DEVHDR_SIZE)
{
if (rc < 0)
// "%1d:%04X CKD file %s: error in function %s: %s"
WRMSG( HHC00404, "E", LCSS_DEVNUM,
filename, "read()", strerror( errno ));
else
// "%1d:%04X CKD file %s: error in function %s: %s"
WRMSG( HHC00404, "E", LCSS_DEVNUM,
filename, "read()", "CKD header incomplete" );
return -1;
}
/* Save the serial number */
if (serial[0]) // (override?)
memcpy( dev->serial, serial, sizeof( dev->serial ));
else
memcpy( dev->serial, devhdr.dh_serial, sizeof( dev->serial ));
{
static const BYTE nulls[12] = {0};
if (memcmp( dev->serial, nulls, 12 ) == 0)
gen_dasd_serial( dev->serial );
}
/* Check the device header identifier */
dev->cckd64 = 1;
if (!is_dh_devid_typ( devhdr.dh_devid, CKD64_CMP_OR_NML_TYP ))
{
if (is_dh_devid_typ( devhdr.dh_devid, CKD32_CMP_OR_NML_TYP ))
{
dev->cckd64 = 0;
close( dev->fd );
dev->fd = -1;
return ckd_dasd_init_handler( dev, argc, argv );
}
// "%1d:%04X CKD file %s: ckd header invalid"
WRMSG( HHC00406, "E", LCSS_DEVNUM, filename );
return -1;
}
if (is_dh_devid_typ( devhdr.dh_devid, CKD_C064_TYP ))
{
cckd = 1;
if (fileseq != 1)
{
// "%1d:%04X CKD file %s: only 1 CCKD file allowed"
WRMSG( HHC00407, "E", LCSS_DEVNUM, filename );
return -1;
}
}
if (dev->ckdrdonly)
if (!dev->quiet)
// "%1d:%04X CKD64 file %s: opened r/o%s"
WRMSG( HHC00476, "I", LCSS_DEVNUM,
filename, dev->ckdfakewr ? " with fake writing" : "" );
/* Read the compressed device header */
if (cckd)
{
rc = read (dev->fd, &cdevhdr, CCKD64_DEVHDR_SIZE);
if (rc < (int) CCKD64_DEVHDR_SIZE)
{
if (rc < 0)
{
// "%1d:%04X CKD file %s: error in function %s: %s"
WRMSG( HHC00404, "E", LCSS_DEVNUM,
filename, "read()", strerror( errno ));
}
else
{
// "%1d:%04X CKD file %s: error in function %s: %s"
WRMSG( HHC00404, "E", LCSS_DEVNUM,
filename, "read()", "CCKD header incomplete" );
}
return -1;
}
}
/* Extract fields from device header */
FETCH_LE_FW( heads, devhdr.dh_heads );
FETCH_LE_FW( trksize, devhdr.dh_trksize );
FETCH_LE_HW( highcyl, devhdr.dh_highcyl );
if (cckd == 0)
{
if (dev->dasdcopy == 0)
{
trks = (int)((statbuf.st_size - CKD_DEVHDR_SIZE) / trksize);
cyls = trks / heads;
if (fileseq == 1 && highcyl == cyls)
{
devhdr.dh_fileseq = 0;
highcyl = 0;
}
}
else
{
/*
* For dasdcopy we get the number of cylinders and tracks from
* the highcyl in the device header. The last file will have
* a sequence number of 0xFF.
*/
cyls = highcyl - dev->ckdcyls + 1;
trks = cyls * heads;
if (devhdr.dh_fileseq == 0xFF)
{
devhdr.dh_fileseq = (fileseq == 1 ? 0 : fileseq);
highcyl = 0;
store_hw( devhdr.dh_highcyl, 0 );
lseek (dev->fd, 0, SEEK_SET);
rc = write (dev->fd, &devhdr, CKD_DEVHDR_SIZE);
}
}
}
else
{
FETCH_LE_FW( cyls, cdevhdr.cdh_cyls );
trks = cyls * heads;
}
/* Check for correct file sequence number */
if (devhdr.dh_fileseq != fileseq
&& !(devhdr.dh_fileseq == 0 && fileseq == 1))
{
// "%1d:%04X CKD file %s: ckd file out of sequence or bad size"
WRMSG( HHC00408, "E", LCSS_DEVNUM, filename );
return -1;
}
if (devhdr.dh_fileseq > 0)
{
if (!dev->quiet)
// "%1d:%04X CKD file %s: seq %02d cyls %6d-%-6d"
WRMSG( HHC00409, "I", LCSS_DEVNUM,
filename, devhdr.dh_fileseq, dev->ckdcyls,
(highcyl > 0 ? highcyl : dev->ckdcyls + cyls - 1));
}
/* Save device geometry of first file, or check that device
geometry of subsequent files matches that of first file */
if (fileseq == 1)
{
dev->ckdheads = heads;
dev->ckdtrksz = trksize;
}
else if (heads != dev->ckdheads || trksize != dev->ckdtrksz)
{
// "%1d:%04X CKD file %s: found heads %d trklen %d, expected heads %d trklen %d"
WRMSG( HHC00410, "E", LCSS_DEVNUM,
filename, heads, trksize, dev->ckdheads, dev->ckdtrksz );
return -1;
}
/* Consistency check device header */
if (cckd == 0 && dev->dasdcopy == 0 && (cyls * heads != trks
|| ((off_t)trks * trksize) + CKD_DEVHDR_SIZE
!= statbuf.st_size
|| (highcyl != 0 && highcyl != dev->ckdcyls + cyls - 1)))
{
// "%1d:%04X CKD file %s: ckd header inconsistent with file size"
WRMSG( HHC00411, "E", LCSS_DEVNUM, filename );
return -1;
}
/* Check for correct high cylinder number */
if (highcyl != 0 && highcyl != dev->ckdcyls + cyls - 1)
{
// "%1d:%04X CKD file %s: ckd header high cylinder incorrect"
WRMSG( HHC00412, "E", LCSS_DEVNUM, filename );
return -1;
}
/* Accumulate total volume size */
dev->ckdtrks += trks;
dev->ckdcyls += cyls;
/* Save file descriptor and high track number */
dev->ckdfd[fileseq-1] = dev->fd;
dev->ckdhitrk[fileseq-1] = dev->ckdtrks;
dev->ckdnumfd = fileseq;
/* Exit loop if this is the last file */
if (highcyl == 0) break;
/* Increment the file sequence number */
fileseq++;
/* Alter the file name suffix ready for the next file */
if ( fileseq <= 9 )
*sfxptr = '0' + fileseq;
else
*sfxptr = 'A' - 10 + fileseq;
/* Check that maximum files has not been exceeded */
if (fileseq > CKD_MAXFILES)
{
// "%1d:%04X CKD file %s: maximum CKD files exceeded: %d"
WRMSG( HHC00413, "E", LCSS_DEVNUM, filename, CKD_MAXFILES );
return -1;
}
} /* end for(fileseq) */
/* Restore the last character of the file name */
*sfxptr = sfxchar;
/* Locate the CKD dasd table entry */
dev->ckdtab = dasd_lookup (DASD_CKDDEV, NULL, dev->devtype, dev->ckdcyls);
if (dev->ckdtab == NULL)
{
// "%1d:%04X CKD file %s: device type %4.4X not found in dasd table"
WRMSG( HHC00415, "E", LCSS_DEVNUM,
filename, dev->devtype );
return -1;
}
/* Log the device geometry */
if (!dev->quiet)
// "%1d:%04X CKD64 file %s: model %s cyls %d heads %d tracks %d trklen %d"
WRMSG( HHC00470, "I", LCSS_DEVNUM, filename, dev->ckdtab->name,
dev->ckdcyls, dev->ckdheads, dev->ckdtrks, dev->ckdtrksz );
/* Locate the CKD control unit dasd table entry */
dev->ckdcu = dasd_lookup (DASD_CKDCU, cu ? cu : dev->ckdtab->cu, 0, 0);
if (dev->ckdcu == NULL)
{
// "%1d:%04X CKD file %s: control unit %s not found in dasd table"
WRMSG( HHC00416, "E", LCSS_DEVNUM,
filename, cu ? cu : dev->ckdtab->cu );
return -1;
}
/* Set number of sense bytes according to controller specification */
dev->numsense = dev->ckdcu->senselength;
/* Set flag bit if 3990 controller */
if (dev->ckdcu->devt == 0x3990)
dev->ckd3990 = 1;
/* Build the dh_devid area */
dev->numdevid = dasd_build_ckd_devid (dev->ckdtab, dev->ckdcu,
(BYTE *)&dev->devid);
/* Build the devchar area */
dev->numdevchar = dasd_build_ckd_devchar (dev->ckdtab, dev->ckdcu,
(BYTE *)&dev->devchar, dev->ckdcyls);
/* Clear the DPA */
memset(dev->pgid, 0, sizeof(dev->pgid));
/* Activate I/O tracing */
// dev->ccwtrace = 1;
/* Request the channel to merge data chained write CCWs into
a single buffer before passing data to the device handler */
dev->cdwmerge = 1;
/* default for device cache is on */
dev->devcache = TRUE;
if (!cckd) return 0;
else return cckd64_dasd_init_handler(dev, argc, argv);
} /* end function ckd64_dasd_init_handler */