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ckddasd.c
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/* CKDDASD.C (c) Copyright Roger Bowler, 1999-2005 */
/* ESA/390 CKD Direct Access Storage Device Handler */
/*-------------------------------------------------------------------*/
/* This module contains device handling functions for emulated */
/* count-key-data direct access storage devices. */
/*-------------------------------------------------------------------*/
/*-------------------------------------------------------------------*/
/* 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"
/*-------------------------------------------------------------------*/
/* 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_RDANY 0x0A /* ...read any */
#define CKDOPER_WRTTRK 0x0B /* ...write track */
#define CKDOPER_RDTRKS 0x0C /* ...read tracks */
#define CKDOPER_READ 0x16 /* ...read */
/*-------------------------------------------------------------------*/
/* 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 */
/*-------------------------------------------------------------------*/
/* Static data areas */
/*-------------------------------------------------------------------*/
static 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; /* Argument keyword */
int cckd=0; /* 1 if compressed CKD */
BYTE pathname[MAX_PATH]; /* file path in host format */
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)-1)
{
logmsg (_("HHCDA001E File name missing or invalid\n"));
return -1;
}
/* Save the file name in the device block */
strcpy (dev->filename, argv[0]);
/* Device is shareable */
dev->shared = 1;
/* Check for possible remote device */
hostpath(pathname, dev->filename, sizeof(pathname));
if (STAT(pathname, &statbuf) < 0)
{
rc = shared_ckd_init ( dev, argc, argv);
if (rc < 0)
{
logmsg (_("HHCDA002E %4.4X:File not found or invalid\n"),
dev->devnum);
return -1;
}
else
return rc;
}
/* Default to synchronous I/O */
dev->syncio = 1;
/* 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, '/');
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)
{
if ('\"' == argv[i][3]) argv[i]++;
dev->dasdsfn = strdup(argv[i]+3);
if (dev->dasdsfn)
{
/* Set the pointer to the suffix character */
dev->dasdsfx = strrchr (dev->dasdsfn, '/');
if (dev->dasdsfx == NULL)
dev->dasdsfx = dev->dasdsfn + 1;
dev->dasdsfx = strchr (dev->dasdsfx, '.');
if (dev->dasdsfx == NULL)
dev->dasdsfx = dev->dasdsfn + strlen(dev->dasdsfn);
dev->dasdsfx--;
}
continue;
}
if (strlen (argv[i]) > 3
&& memcmp("cu=", argv[i], 3) == 0)
{
kw = strtok (argv[i], "=");
cu = strtok (NULL, " \t");
continue;
}
if (strcasecmp ("nosyncio", argv[i]) == 0 ||
strcasecmp ("nosyio", argv[i]) == 0)
{
dev->syncio = 0;
continue;
}
if (strcasecmp ("syncio", argv[i]) == 0 ||
strcasecmp ("syio", argv[i]) == 0)
{
dev->syncio = 1;
continue;
}
logmsg (_("HHCDA003E parameter %d is invalid: %s\n"),
i + 1, argv[i]);
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)
logmsg (_("HHCDA004I opening %s readonly%s\n"), dev->filename,
dev->ckdfakewr ? " with fake writing" : "");
for (fileseq = 1;;)
{
/* Open the CKD image file */
hostpath(pathname, dev->filename, sizeof(pathname));
dev->fd = open (pathname, 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 = open (pathname, O_RDONLY|O_BINARY);
if (dev->fd < 0)
{
logmsg (_("HHCDA005E %s open error: %s\n"),
dev->filename, strerror(errno));
return -1;
}
}
/* If shadow file, only one base file is allowed */
if (fileseq > 1 && dev->dasdsfn != NULL)
{
logmsg (_("HHCDA006E %s not in a single file for shadowing\n"),
dev->filename);
return -1;
}
/* Determine the device size */
rc = FSTAT (dev->fd, &statbuf);
if (rc < 0)
{
logmsg (_("HHCDA007E %s fstat error: %s\n"),
dev->filename, 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)
logmsg (_("HHCDA008E %s read error: %s\n"),
dev->filename, strerror(errno));
else
logmsg (_("HHCDA09E %s CKD header incomplete\n"),
dev->filename);
return -1;
}
/* Check the device header identifier */
if (memcmp(devhdr.devid, "CKD_P370", 8) != 0)
{
if (memcmp(devhdr.devid, "CKD_C370", 8) != 0)
{
logmsg (_("HHCDA010E %s CKD header invalid\n"),
dev->filename);
return -1;
}
else
{
cckd = 1;
if (fileseq != 1)
{
logmsg (_("HHCDA011E %s Only 1 CCKD file allowed\n"),
dev->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)
{
logmsg (_("HHCDA012E %s read error: %s\n"),
dev->filename, strerror(errno));
}
else
{
logmsg (_("HHCDA013E %s CCKD header incomplete\n"),
dev->filename);
}
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;
}
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))
{
logmsg (_("HHCDA014E %s CKD file out of sequence\n"),
dev->filename);
return -1;
}
if (devhdr.fileseq > 0)
{
logmsg (_("HHCDA015I %s seq=%d cyls=%d-%d\n"),
dev->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)
{
logmsg (_("HHCDA016E %s heads=%d trklen=%d, "
"expected heads=%d trklen=%d\n"),
dev->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)))
{
logmsg (_("HHCDA017E %s CKD header inconsistent with file size\n"),
dev->filename);
return -1;
}
/* Check for correct high cylinder number */
if (highcyl != 0 && highcyl != dev->ckdcyls + cyls - 1)
{
logmsg (_("HHCDA018E %s CKD header high cylinder incorrect\n"),
dev->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 */
*sfxptr = '0' + fileseq;
/* Check that maximum files has not been exceeded */
if (fileseq > CKD_MAXFILES)
{
logmsg (_("HHCDA019E %s exceeds maximum %d CKD files\n"),
dev->filename, CKD_MAXFILES);
return -1;
}
} /* end for(fileseq) */
/* Restore the last character of the file name */
*sfxptr = sfxchar;
/* Log the device geometry */
logmsg (_("HHCDA020I %s cyls=%d heads=%d tracks=%d trklen=%d\n"),
dev->filename, dev->ckdcyls,
dev->ckdheads, dev->ckdtrks, dev->ckdtrksz);
/* Set number of sense bytes */
dev->numsense = 32;
if ((dev->devtype == 0x2311 ) || (dev->devtype == 0x2314 ))
{
dev->numsense = 6;
}
if ((dev->devtype == 0x3330 ) || (dev->devtype == 0x3340 )
|| (dev->devtype == 0x3350 ) || (dev->devtype == 0x3375 )
|| (dev->devtype == 0x3380 ))
{
dev->numsense = 24;
}
/* Locate the CKD dasd table entry */
dev->ckdtab = dasd_lookup (DASD_CKDDEV, NULL, dev->devtype, dev->ckdcyls);
if (dev->ckdtab == NULL)
{
logmsg (_("HHCDA021E %4.4X device type %4.4X not found in dasd table\n"),
dev->devnum, 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)
{
logmsg (_("HHCDA022E %4.4X control unit %s not found in dasd table\n"),
dev->devnum, cu ? cu : dev->ckdtab->cu);
return -1;
}
/* 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;
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 **class,
int buflen, char *buffer)
{
*class = "DASD";
snprintf (buffer, buflen, "%s [%d cyls]",
dev->filename,
dev->ckdcyls);
} /* 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 */
ckddasd_read_track (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)
logmsg (_("HHCDA023I %4.4X cache hits %d, misses %d, waits %d\n"),
dev->devnum, 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 */
/*-------------------------------------------------------------------*/
static 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 */
int active; /* 1=Synchronous I/O active */
CKDDASD_TRKHDR *trkhdr; /* -> New track header */
logdevtr (dev, _("HHCDA024I read trk %d cur trk %d\n"), 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;
/* Turn off the synchronous I/O bit if trk overflow or trk 0 */
active = dev->syncio_active;
if (dev->ckdtrkof || trk <= 0)
dev->syncio_active = 0;
/* Write the previous track image if modified */
if (dev->bufupd)
{
/* Retry if synchronous I/O */
if (dev->syncio_active)
{
dev->syncio_retry = 1;
return -1;
}
logdevtr (dev, _("HHCDA025I read track: updating track %d\n"),
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 */
logmsg (_("HHCDA026E error writing trk %d: lseek error: %s\n"),
dev->bufcur, 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 seek error condition */
logmsg (_("HHCDA027E error writing trk %d: write error: %s\n"),
dev->bufcur, 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);
logdevtr (dev, _("HHCDA028I read trk %d cache hit, using cache[%d]\n"),
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;
dev->syncio_active = active;
return 0;
}
/* Retry if synchronous I/O */
if (dev->syncio_active)
{
cache_unlock(CACHE_DEVBUF);
dev->syncio_retry = 1;
return -1;
}
/* Wait if no available cache entry */
if (o < 0)
{
logdevtr (dev, _("HHCDA029I read trk %d no available cache entry, waiting\n"),
trk);
dev->cachewaits++;
cache_wait(CACHE_DEVBUF);
goto ckd_read_track_retry;
}
/* Cache miss */
logdevtr (dev, _("HHCDA030I read trk %d cache miss, using cache[%d]\n"),
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;
dev->syncio_active = active;
logdevtr (dev, _("HHCDA031I read trk %d reading file %d offset %lld len %d\n"),
trk, f+1, (long long)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 */
logmsg (_("HHCDA032E error reading trk %d: lseek error: %s\n"),
trk, 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 */
logmsg (_("HHCDA033E error reading trk %d: read error: %s\n"),
trk, (rc < 0 ? strerror(errno) : "unexpected end of file"));
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;
}
}
else
{
trkhdr = (CKDDASD_TRKHDR *)dev->buf;
trkhdr->bin = 0;
trkhdr->cyl[0] = (cyl >> 8);
trkhdr->cyl[1] = (cyl & 0xFF);
trkhdr->head[0] = (head >> 8);
trkhdr->head[1] = (head & 0xFF);
memset (dev->buf + CKDDASD_TRKHDR_SIZE, 0xFF, 8);
}
/* Validate the track header */
logdevtr (dev, _("HHCDA034I read trk %d trkhdr %2.2x %2.2x%2.2x %2.2x%2.2x\n"),
trk, dev->buf[0], dev->buf[1], dev->buf[2], dev->buf[3], dev->buf[4]);
trkhdr = (CKDDASD_TRKHDR *)dev->buf;
if (trkhdr->bin != 0
|| trkhdr->cyl[0] != (cyl >> 8)
|| trkhdr->cyl[1] != (cyl & 0xFF)
|| trkhdr->head[0] != (head >> 8)
|| trkhdr->head[1] != (head & 0xFF))
{
logmsg (_("HHCDA035E %4.4X invalid track header for cyl %d head %d "
" %2.2x%2.2x%2.2x%2.2x%2.2x\n"), dev->devnum, cyl, head,
trkhdr->bin,trkhdr->cyl[0],trkhdr->cyl[1],trkhdr->head[0],trkhdr->head[1]);
ckd_build_sense (dev, 0, SENSE1_ITF, 0, 0, 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;
}
dev->cache = o;
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);