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ckddasd.c
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ckddasd.c
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/* CKDDASD.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 _CKDDASD_C_
#define _HDASD_DLL_
#include "hercules.h"
#include "devtype.h"
#include "sr.h"
#include "dasdblks.h"
#define LCSS_DEVNUM SSID_TO_LCSS( dev->ssid ), dev->devnum
/*-------------------------------------------------------------------*/
/* Bit definitions for File Mask */
/*-------------------------------------------------------------------*/
#define CKDMASK_WRCTL 0xC0 /* Write control bits... */
#define CKDMASK_WRCTL_INHWR0 0x00 /* ...inhibit write HA/R0 */
#define CKDMASK_WRCTL_INHWRT 0x40 /* ...inhibit all writes */
#define CKDMASK_WRCTL_ALLWRU 0x80 /* ...write update only */
#define CKDMASK_WRCTL_ALLWRT 0xC0 /* ...allow all writes */
#define CKDMASK_RESV 0x20 /* Reserved bits - must be 0 */
#define CKDMASK_SKCTL 0x18 /* Seek control bits... */
#define CKDMASK_SKCTL_ALLSKR 0x00 /* ...allow all seek/recalib */
#define CKDMASK_SKCTL_CYLHD 0x08 /* ...allow seek cyl/head */
#define CKDMASK_SKCTL_HEAD 0x10 /* ...allow seek head only */
#define CKDMASK_SKCTL_INHSMT 0x18 /* ...inhibit seek and MT */
#define CKDMASK_AAUTH 0x06 /* Access auth bits... */
#define CKDMASK_AAUTH_NORMAL 0x00 /* ...normal authorization */
#define CKDMASK_AAUTH_DSF 0x02 /* ...device support auth */
#define CKDMASK_AAUTH_DIAG 0x04 /* ...diagnostic auth */
#define CKDMASK_AAUTH_DSFNCR 0x06 /* ...device support with no
correction or retry */
#define CKDMASK_PCI_FETCH 0x01 /* PCI fetch mode */
/*-------------------------------------------------------------------*/
/* Bit definitions for Define Extent global attributes byte */
/*-------------------------------------------------------------------*/
#define CKDGATR_ARCH 0xC0 /* Architecture mode... */
#define CKDGATR_ARCH_ECKD 0xC0 /* ...extended CKD mode */
#define CKDGATR_CKDCONV 0x20 /* CKD conversion mode */
#define CKDGATR_SSOP 0x1C /* Subsystem operation mode..*/
#define CKDGATR_SSOP_NORMAL 0x00 /* ...normal cache */
#define CKDGATR_SSOP_BYPASS 0x04 /* ...bypass cache */
#define CKDGATR_SSOP_INHIBIT 0x08 /* ...inhibit cache loading */
#define CKDGATR_SSOP_SEQACC 0x0C /* ...sequential access */
#define CKDGATR_SSOP_LOGGING 0x10 /* ...logging mode */
#define CKDGATR_USE_CACHE_FW 0x02 /* Use cache fast write */
#define CKDGATR_INH_DASD_FW 0x01 /* Inhibit DASD fast write */
/*-------------------------------------------------------------------*/
/* Bit definitions for Locate operation byte */
/*-------------------------------------------------------------------*/
#define CKDOPER_ORIENTATION 0xC0 /* Orientation bits... */
#define CKDOPER_ORIENT_COUNT 0x00 /* ...orient to count */
#define CKDOPER_ORIENT_HOME 0x40 /* ...orient to home address */
#define CKDOPER_ORIENT_DATA 0x80 /* ...orient to data area */
#define CKDOPER_ORIENT_INDEX 0xC0 /* ...orient to index */
#define CKDOPER_CODE 0x3F /* Operation code bits... */
#define CKDOPER_ORIENT 0x00 /* ...orient */
#define CKDOPER_WRITE 0x01 /* ...write data */
#define CKDOPER_FORMAT 0x03 /* ...format write */
#define CKDOPER_RDDATA 0x06 /* ...read data */
#define CKDOPER_WRTANY 0x09 /* ...write any */
#define CKDOPER_RDANY 0x0A /* ...read any */
#define CKDOPER_WRTTRK 0x0B /* ...write track */
#define CKDOPER_RDTRKS 0x0C /* ...read tracks */
#define CKDOPER_RDTSET 0x0E /* ...read track set */
#define CKDOPER_READ 0x16 /* ...read */
#define CKDOPER_EXTOP 0x3F /* ...extended operation */
/*-------------------------------------------------------------------*/
/* Bit definitions for Locate auxiliary byte */
/*-------------------------------------------------------------------*/
#define CKDLAUX_TLFVALID 0x80 /* TLF field is valid */
#define CKDLAUX_RESV 0x7E /* Reserved bits - must be 0 */
#define CKDLAUX_RDCNTSUF 0x01 /* Suffixed read count CCW */
/*-------------------------------------------------------------------*/
/* Definitions for ckdorient field in device block */
/*-------------------------------------------------------------------*/
#define CKDORIENT_NONE 0 /* Orientation unknown */
#define CKDORIENT_INDEX 1 /* Oriented after track hdr */
#define CKDORIENT_COUNT 2 /* Oriented after count field*/
#define CKDORIENT_KEY 3 /* Oriented after key field */
#define CKDORIENT_DATA 4 /* Oriented after data field */
#define CKDORIENT_EOT 5 /* Oriented after end of trk */
/* Path state byte for Sense Path Group ID command */
#define SPG_PATHSTAT 0xC0 /* Pathing status bits... */
#define SPG_PATHSTAT_RESET 0x00 /* ...reset */
#define SPG_PATHSTAT_RESV 0x40 /* ...reserved bit setting */
#define SPG_PATHSTAT_UNGROUPED 0x80 /* ...ungrouped */
#define SPG_PATHSTAT_GROUPED 0xC0 /* ...grouped */
#define SPG_PARTSTAT 0x30 /* Partitioning status bits..*/
#define SPG_PARTSTAT_IENABLED 0x00 /* ...implicitly enabled */
#define SPG_PARTSTAT_RESV 0x10 /* ...reserved bit setting */
#define SPG_PARTSTAT_DISABLED 0x20 /* ...disabled */
#define SPG_PARTSTAT_XENABLED 0x30 /* ...explicitly enabled */
#define SPG_PATHMODE 0x08 /* Path mode bit... */
#define SPG_PATHMODE_SINGLE 0x00 /* ...single path mode */
#define SPG_PATHMODE_RESV 0x08 /* ...reserved bit setting */
#define SPG_RESERVED 0x07 /* Reserved bits, must be 0 */
/* Function control byte for Set Path Group ID command */
#define SPG_SET_MULTIPATH 0x80 /* Set multipath mode */
#define SPG_SET_COMMAND 0x60 /* Set path command bits... */
#define SPG_SET_ESTABLISH 0x00 /* ...establish group */
#define SPG_SET_DISBAND 0x20 /* ...disband group */
#define SPG_SET_RESIGN 0x40 /* ...resign from group */
#define SPG_SET_COMMAND_RESV 0x60 /* ...reserved bit setting */
#define SPG_SET_RESV 0x1F /* Reserved bits, must be 0 */
/*-------------------------------------------------------------------*/
/* Bit definitions for Diagnostic Control subcommand byte */
/*-------------------------------------------------------------------*/
#define DIAGCTL_INHIBIT_WRITE 0x02 /* Inhibit Write */
#define DIAGCTL_SET_GUAR_PATH 0x04 /* Set Guaranteed Path */
#define DIAGCTL_ENABLE_WRITE 0x08 /* Enable Write */
#define DIAGCTL_3380_TC_MODE 0x09 /* 3380 Track Compat Mode */
#define DIAGCTL_INIT_SUBSYS 0x0B /* Diagnostic Init Subsys */
#define DIAGCTL_UNFENCE 0x0C /* Unfence */
#define DIAGCTL_ACCDEV_UNKCOND 0x0F /* Access Device Unknown Cond*/
#define DIAGCTL_MAINT_RESERVE 0x10 /* Media Maintenance Reserve */
#define DIAGCTL_MAINT_RELEASE 0x11 /* Media Maintenance Release */
#define DIAGCTL_MAINT_QUERY 0x12 /* Media Maintenance Query */
/*-------------------------------------------------------------------*/
/* Definitions for sense data format codes and message codes */
/*-------------------------------------------------------------------*/
#define FORMAT_0 0 /* Program or System Checks */
#define FORMAT_1 1 /* Device Equipment Checks */
#define FORMAT_2 2 /* 3990 Equipment Checks */
#define FORMAT_3 3 /* 3990 Control Checks */
#define FORMAT_4 4 /* Data Checks */
#define FORMAT_5 5 /* Data Check + Displacement */
#define FORMAT_6 6 /* Usage Stats/Overrun Errors*/
#define FORMAT_7 7 /* Device Control Checks */
#define FORMAT_8 8 /* Device Equipment Checks */
#define FORMAT_9 9 /* Device Rd/Wrt/Seek Checks */
#define FORMAT_F 15 /* Cache Storage Checks */
#define MESSAGE_0 0 /* Message 0 */
#define MESSAGE_1 1 /* Message 1 */
#define MESSAGE_2 2 /* Message 2 */
#define MESSAGE_3 3 /* Message 3 */
#define MESSAGE_4 4 /* Message 4 */
#define MESSAGE_5 5 /* Message 5 */
#define MESSAGE_6 6 /* Message 6 */
#define MESSAGE_7 7 /* Message 7 */
#define MESSAGE_8 8 /* Message 8 */
#define MESSAGE_9 9 /* Message 9 */
#define MESSAGE_A 10 /* Message A */
#define MESSAGE_B 11 /* Message B */
#define MESSAGE_C 12 /* Message C */
#define MESSAGE_D 13 /* Message D */
#define MESSAGE_E 14 /* Message E */
#define MESSAGE_F 15 /* Message F */
/*-------------------------------------------------------------------*/
/* Definitions for Read Configuration Data command */
/*-------------------------------------------------------------------*/
#define CONFIG_DATA_SIZE 256 /* Number of bytes returned
by Read Config Data CCW */
/*
* ISW20060207
* EXTENT_CHECK0 is just to shut up a stupid gcc 4 warning..
* It doesn't hurt otherwise
* EXTENT_CHECK0(dev) is the same as EXTENT_CHECK(dev,0,0)
*/
#define EXTENT_CHECK0(_dev) ((_dev)->ckdxbcyl > 0 \
|| ((_dev)->ckdxbcyl==0 && (_dev)->ckdxbhead>0))
#define EXTENT_CHECK(_dev, _cyl, _head) \
( (_cyl) < (_dev)->ckdxbcyl || (_cyl) > (_dev)->ckdxecyl \
|| ((_cyl) == (_dev)->ckdxbcyl && (_head) < (_dev)->ckdxbhead) \
|| ((_cyl) == (_dev)->ckdxecyl && (_head) > (_dev)->ckdxehead) )
/*-------------------------------------------------------------------*/
/* Static data areas */
/*-------------------------------------------------------------------*/
static const BYTE eighthex00[] = {0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00};
static const BYTE eighthexFF[] = {0xff,0xff,0xff,0xff,
0xff,0xff,0xff,0xff};
/*-------------------------------------------------------------------*/
/* Initialize the device handler */
/*-------------------------------------------------------------------*/
int ckddasd_init_handler ( DEVBLK *dev, int argc, char *argv[] )
{
int rc; /* Return code */
struct stat statbuf; /* File information */
CKDDASD_DEVHDR devhdr; /* Device header */
CCKDDASD_DEVHDR cdevhdr; /* Compressed device header */
int i; /* Loop index */
int 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 */
char *kw = NULL; /* Argument keyword */
int cckd=0; /* 1 if compressed CKD */
char filename[FILENAME_MAX]; /* work area for display */
char *strtok_str = NULL; /* save last position */
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)
{
kw = strtok_r (argv[i], "=", &strtok_str);
cu = strtok_r (NULL, " \t", &strtok_str);
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 */
if (dev->ckdrdonly)
if (!dev->quiet)
// "%1d:%04X CKD file %s: opening as r/o%s"
WRMSG( HHC00403, "I", LCSS_DEVNUM,
filename, dev->ckdfakewr ? " with fake writing" : "" );
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, CKDDASD_DEVHDR_SIZE);
if (rc < (int)CKDDASD_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;
}
/* Check the device header identifier */
if (memcmp(devhdr.devid, "CKD_P370", 8) != 0)
{
if (memcmp(devhdr.devid, "CKD_C370", 8) != 0)
{
// "%1d:%04X CKD file %s: ckd header invalid"
WRMSG( HHC00406, "E", LCSS_DEVNUM, filename );
return -1;
}
else
{
cckd = 1;
if (fileseq != 1)
{
// "%1d:%04X CKD file %s: only 1 CCKD file allowed"
WRMSG( HHC00407, "E", LCSS_DEVNUM, filename );
return -1;
}
}
}
/* Read the compressed device header */
if ( cckd )
{
rc = read (dev->fd, &cdevhdr, CCKDDASD_DEVHDR_SIZE);
if (rc < (int)CCKDDASD_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 */
heads = ((U32)(devhdr.heads[3]) << 24)
| ((U32)(devhdr.heads[2]) << 16)
| ((U32)(devhdr.heads[1]) << 8)
| (U32)(devhdr.heads[0]);
trksize = ((U32)(devhdr.trksize[3]) << 24)
| ((U32)(devhdr.trksize[2]) << 16)
| ((U32)(devhdr.trksize[1]) << 8)
| (U32)(devhdr.trksize[0]);
highcyl = ((U32)(devhdr.highcyl[1]) << 8)
| (U32)(devhdr.highcyl[0]);
if (cckd == 0)
{
if (dev->dasdcopy == 0)
{
trks = (statbuf.st_size - CKDDASD_DEVHDR_SIZE) / trksize;
cyls = trks / heads;
if (fileseq == 1 && highcyl == cyls)
{
devhdr.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.fileseq == 0xFF)
{
devhdr.fileseq = fileseq == 1 ? 0 : fileseq;
highcyl = 0;
devhdr.highcyl[0] = devhdr.highcyl[1] = 0;
lseek (dev->fd, 0, SEEK_SET);
rc = write (dev->fd, &devhdr, CKDDASD_DEVHDR_SIZE);
}
}
}
else
{
cyls = ((U32)(cdevhdr.cyls[3]) << 24)
| ((U32)(cdevhdr.cyls[2]) << 16)
| ((U32)(cdevhdr.cyls[1]) << 8)
| (U32)(cdevhdr.cyls[0]);
trks = cyls * heads;
}
/* Check for correct file sequence number */
if (devhdr.fileseq != fileseq
&& !(devhdr.fileseq == 0 && fileseq == 1))
{
// "%1d:%04X CKD file %s: ckd file out of sequence"
WRMSG( HHC00408, "E", LCSS_DEVNUM, filename );
return -1;
}
if (devhdr.fileseq > 0)
{
if (!dev->quiet)
// "%1d:%04X CKD file %s: seq %02d cyls %6d-%-6d"
WRMSG( HHC00409, "I", LCSS_DEVNUM,
filename, devhdr.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) + CKDDASD_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;
/* Log the device geometry */
if (!dev->quiet)
// "%1d:%04X CKD file %s: cyls %d heads %d tracks %d trklen %d"
WRMSG( HHC00414, "I", LCSS_DEVNUM, filename,
dev->ckdcyls, dev->ckdheads, dev->ckdtrks, dev->ckdtrksz );
/* 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;
}
/* 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 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 cckddasd_init_handler(dev, argc, argv);
} /* end function ckddasd_init_handler */
/*-------------------------------------------------------------------*/
/* Query the device definition */
/*-------------------------------------------------------------------*/
void ckddasd_query_device (DEVBLK *dev, char **devclass,
int buflen, char *buffer)
{
CCKDDASD_EXT *cckd;
BEGIN_DEVICE_CLASS_QUERY( "DASD", dev, devclass, buflen, buffer );
cckd = dev->cckd_ext;
if (!cckd)
{
if ( dev->ckdnumfd > 1)
{
snprintf( buffer, buflen, "%s [%d cyls] [%d segs] IO[%"PRIu64"]",
dev->filename,
dev->ckdcyls,
dev->ckdnumfd,
dev->excps );
}
else
{
snprintf( buffer, buflen, "%s [%d cyls] IO[%"PRIu64"]",
dev->filename,
dev->ckdcyls,
dev->excps );
}
}
else
{
snprintf( buffer, buflen, "%s [%d cyls] [%d sfs] IO[%"PRIu64"]",
dev->filename,
dev->ckdcyls,
cckd->sfn,
dev->excps );
}
} /* end function ckddasd_query_device */
/*-------------------------------------------------------------------*/
/* Release cache entries */
/*-------------------------------------------------------------------*/
int ckddasd_purge_cache (int *answer, int ix, int i, void *data)
{
U16 devnum; /* Cached device number */
int trk; /* Cached track */
DEVBLK *dev = data; /* -> device block */
UNREFERENCED(answer);
CKD_CACHE_GETKEY(i, devnum, trk);
if (dev->devnum == devnum)
cache_release (ix, i, CACHE_FREEBUF);
return 0;
}
static int ckddasd_read_track (DEVBLK *dev, int trk, BYTE *unitstat);
/*-------------------------------------------------------------------*/
/* Close the device */
/*-------------------------------------------------------------------*/
int ckddasd_close_device ( DEVBLK *dev )
{
int i; /* Index */
BYTE unitstat; /* Unit Status */
/* Write the last track image if it's modified */
(dev->hnd->read) (dev, -1, &unitstat);
/* Free the cache */
cache_lock(CACHE_DEVBUF);
cache_scan(CACHE_DEVBUF, ckddasd_purge_cache, dev);
cache_unlock(CACHE_DEVBUF);
if (!dev->batch)
if (!dev->quiet)
// "%1d:%04X CKD file %s: cache hits %d, misses %d, waits %d"
WRMSG( HHC00417, "I", LCSS_DEVNUM,
dev->filename, dev->cachehits, dev->cachemisses, dev->cachewaits );
/* Close all of the CKD image files */
for (i = 0; i < dev->ckdnumfd; i++)
if (dev->ckdfd[i] > 2)
close (dev->ckdfd[i]);
dev->buf = NULL;
dev->bufsize = 0;
return 0;
} /* end function ckddasd_close_device */
/*-------------------------------------------------------------------*/
/* Read a track image at CCHH */
/*-------------------------------------------------------------------*/
static
int ckd_read_cchh (DEVBLK *dev, int cyl, int head, BYTE *unitstat)
{
int rc; /* Return code */
int trk; /* Track number */
/* Command reject if seek position is outside volume */
if (cyl >= dev->ckdcyls || head >= dev->ckdheads)
{
ckd_build_sense (dev, SENSE_CR, 0, 0,
FORMAT_0, MESSAGE_4);
*unitstat = CSW_CE | CSW_DE | CSW_UC;
return -1;
}
/* Calculate the track number */
trk = cyl * dev->ckdheads + head;
/* Call the read exit */
rc = (dev->hnd->read) (dev, trk, unitstat);
return rc;
} /* end function ckd_read_cchh */
/*-------------------------------------------------------------------*/
/* Return track image length */
/*-------------------------------------------------------------------*/
int ckd_trklen (DEVBLK *dev, BYTE *buf)
{
int sz; /* Size so far */
for (sz = CKDDASD_TRKHDR_SIZE;
memcmp (buf + sz, eighthexFF, 8) != 0; )
{
/* add length of count, key, and data fields */
sz += CKDDASD_RECHDR_SIZE +
buf[sz+5] +
(buf[sz+6] << 8) + buf[sz+7];
if (sz > dev->ckdtrksz - 8) break;
}
/* add length for end-of-track indicator */
sz += CKDDASD_RECHDR_SIZE;
if (sz > dev->ckdtrksz)
sz = dev->ckdtrksz;
return sz;
}
/*-------------------------------------------------------------------*/
/* Read a track image */
/*-------------------------------------------------------------------*/
static
int ckddasd_read_track (DEVBLK *dev, int trk, BYTE *unitstat)
{
int rc; /* Return code */
int cyl; /* Cylinder */
int head; /* Head */
off_t offset; /* File offsets */
int i,o,f; /* Indexes */
CKDDASD_TRKHDR *trkhdr; /* -> New track header */
// "%1d:%04X CKD file %s: read trk %d cur trk %d"
LOGDEVTR( HHC00424, "I", dev->filename, trk, dev->bufcur );
/* Calculate cylinder and head */
cyl = trk / dev->ckdheads;
head = trk % dev->ckdheads;
/* Reset buffer offsets */
dev->bufoff = 0;
dev->bufoffhi = dev->ckdtrksz;
/* Return if reading the same track image */
if (trk >= 0 && trk == dev->bufcur)
return 0;
/* Write the previous track image if modified */
if (dev->bufupd)
{
// "%1d:%04X CKD file %s: read track updating track %d"
LOGDEVTR( HHC00425, "I", dev->filename, dev->bufcur );
dev->bufupd = 0;
/* Seek to the old track image offset */
offset = (off_t)(dev->ckdtrkoff + dev->bufupdlo);
offset = lseek (dev->fd, offset, SEEK_SET);
if (offset < 0)
{
/* Handle seek error condition */
// "%1d:%04X CKD file %s: error in function %s: %s"
WRMSG( HHC00404, "E", LCSS_DEVNUM,
dev->filename, "lseek()", strerror( errno ));
ckd_build_sense (dev, SENSE_EC, 0, 0,
FORMAT_1, MESSAGE_0);
*unitstat = CSW_CE | CSW_DE | CSW_UC;
cache_lock(CACHE_DEVBUF);
cache_setflag(CACHE_DEVBUF, dev->cache, ~CKD_CACHE_ACTIVE, 0);
cache_unlock(CACHE_DEVBUF);
dev->bufupdlo = dev->bufupdhi = 0;
dev->bufcur = dev->cache = -1;
return -1;
}
/* Write the portion of the track image that was modified */
rc = write (dev->fd, &dev->buf[dev->bufupdlo],
dev->bufupdhi - dev->bufupdlo);
if (rc < dev->bufupdhi - dev->bufupdlo)
{
/* Handle write error condition */
// "%1d:%04X CKD file %s: error in function %s: %s"
WRMSG( HHC00404, "E", LCSS_DEVNUM,
dev->filename, "write()", strerror( errno ));
ckd_build_sense (dev, SENSE_EC, 0, 0,
FORMAT_1, MESSAGE_0);
*unitstat = CSW_CE | CSW_DE | CSW_UC;
cache_lock(CACHE_DEVBUF);
cache_setflag(CACHE_DEVBUF, dev->cache, ~CKD_CACHE_ACTIVE, 0);
cache_unlock(CACHE_DEVBUF);
dev->bufupdlo = dev->bufupdhi = 0;
dev->bufcur = dev->cache = -1;
return -1;
}
dev->bufupdlo = dev->bufupdhi = 0;
}
cache_lock (CACHE_DEVBUF);
/* Make the previous cache entry inactive */
if (dev->cache >= 0)
cache_setflag(CACHE_DEVBUF, dev->cache, ~CKD_CACHE_ACTIVE, 0);
dev->bufcur = dev->cache = -1;
/* Return on special case when called by the close handler */
if (trk < 0)
{
cache_unlock (CACHE_DEVBUF);
return 0;
}
ckd_read_track_retry:
/* Search the cache */
i = cache_lookup (CACHE_DEVBUF, CKD_CACHE_SETKEY(dev->devnum, trk), &o);
/* Cache hit */
if (i >= 0)
{
cache_setflag(CACHE_DEVBUF, i, ~0, CKD_CACHE_ACTIVE);
cache_setage(CACHE_DEVBUF, i);
cache_unlock(CACHE_DEVBUF);
// "%1d:%04X CKD file %s: read trk %d cache hit, using cache[%d]"
LOGDEVTR( HHC00426, "I", dev->filename, trk, i );
dev->cachehits++;
dev->cache = i;
dev->buf = cache_getbuf(CACHE_DEVBUF, dev->cache, 0);
dev->bufcur = trk;
dev->bufoff = 0;
dev->bufoffhi = dev->ckdtrksz;
dev->buflen = ckd_trklen (dev, dev->buf);
dev->bufsize = cache_getlen(CACHE_DEVBUF, dev->cache);
/* Set the file descriptor */
for (f = 0; f < dev->ckdnumfd; f++)
if (trk < dev->ckdhitrk[f]) break;
dev->fd = dev->ckdfd[f];
/* Calculate the track offset */
dev->ckdtrkoff = CKDDASD_DEVHDR_SIZE +
(off_t)(trk - (f ? dev->ckdhitrk[f-1] : 0)) * dev->ckdtrksz;
return 0;
}
/* Wait if no available cache entry */
if (o < 0)
{
// "%1d:%04X CKD file %s: read trk %d no available cache entry, waiting"
LOGDEVTR( HHC00427, "I", dev->filename, trk );
dev->cachewaits++;
cache_wait(CACHE_DEVBUF);
goto ckd_read_track_retry;
}
/* Cache miss */
// "%1d:%04X CKD file %s: read trk %d cache miss, using cache[%d]"
LOGDEVTR( HHC00428, "I", dev->filename, trk, o );
dev->cachemisses++;
/* Make this cache entry active */
cache_setkey (CACHE_DEVBUF, o, CKD_CACHE_SETKEY(dev->devnum, trk));
cache_setflag(CACHE_DEVBUF, o, 0, CKD_CACHE_ACTIVE|DEVBUF_TYPE_CKD);
cache_setage (CACHE_DEVBUF, o);
dev->buf = cache_getbuf(CACHE_DEVBUF, o, dev->ckdtrksz);
cache_unlock (CACHE_DEVBUF);
/* Set the file descriptor */
for (f = 0; f < dev->ckdnumfd; f++)
if (trk < dev->ckdhitrk[f]) break;
dev->fd = dev->ckdfd[f];
/* Calculate the track offset */
dev->ckdtrkoff = CKDDASD_DEVHDR_SIZE +
(off_t)(trk - (f ? dev->ckdhitrk[f-1] : 0)) * dev->ckdtrksz;
// "%1d:%04X CKD file %s: read trk %d reading file %d offset %"PRId64" len %d"
LOGDEVTR( HHC00429, "I", dev->filename, trk, f+1, dev->ckdtrkoff, dev->ckdtrksz );
/* Seek to the track image offset */
offset = (off_t)dev->ckdtrkoff;
offset = lseek (dev->fd, offset, SEEK_SET);
if (offset < 0)
{
/* Handle seek error condition */
// "%1d:%04X CKD file %s: error in function %s: %s"
WRMSG( HHC00404, "E", LCSS_DEVNUM,
dev->filename, "lseek()", strerror( errno ));
ckd_build_sense (dev, SENSE_EC, 0, 0, FORMAT_1, MESSAGE_0);
*unitstat = CSW_CE | CSW_DE | CSW_UC;
dev->bufcur = dev->cache = -1;
cache_lock(CACHE_DEVBUF);
cache_release(CACHE_DEVBUF, o, 0);
cache_unlock(CACHE_DEVBUF);
return -1;
}
/* Read the track image */
if (dev->dasdcopy == 0)
{
rc = read (dev->fd, dev->buf, dev->ckdtrksz);
if (rc < dev->ckdtrksz)
{
/* Handle read error condition */