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cckdutil.c
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cckdutil.c
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/* CCKDUTIL.C (C) Copyright Roger Bowler, 1999-2012 */
/* (C) and others 2013-2023 */
/* CCKD (Compressed CKD) Common routines */
/* */
/* Released under "The Q Public License Version 1" */
/* (http://www.hercules-390.org/herclic.html) as modifications to */
/* Hercules. */
/*-------------------------------------------------------------------*/
/* This module contains functions for compressed CKD devices */
/* used by more than 1 main program. */
/*-------------------------------------------------------------------*/
#include "hstdinc.h"
#define _CCKDUTIL_C_
#define _HDASD_DLL_
#include "hercules.h"
#include "opcode.h"
#include "dasdblks.h"
#include "ccwarn.h"
/*-------------------------------------------------------------------*/
/* Internal functions */
/*-------------------------------------------------------------------*/
static int comp_spctab_sort(const void *a, const void *b);
static int cdsk_spctab_sort(const void *a, const void *b);
static int cdsk_build_free_space(SPCTAB *spctab, int s);
/*-------------------------------------------------------------------*/
/* Helper macro */
/*-------------------------------------------------------------------*/
#define gui_fprintf if (extgui) fprintf
/*-------------------------------------------------------------------*/
/* Return compression type string */
/*-------------------------------------------------------------------*/
DLL_EXPORT const char* comp_to_str( BYTE comp )
{
static const char* comp_types[] =
{
"none",
"zlib",
"bzip2"
};
return (comp < _countof( comp_types )) ?
comp_types[ comp ] : "?????";
}
/*-------------------------------------------------------------------*/
/* Return space type string */
/*-------------------------------------------------------------------*/
DLL_EXPORT const char* spc_typ_to_str( BYTE spc_typ )
{
static const char* spc_types[] =
{
"none", // SPCTAB_NONE 0
"devhdr", // SPCTAB_DEVHDR 1
"cdevhdr", // SPCTAB_CDEVHDR 2
"l1", // SPCTAB_L1 3
"l2", // SPCTAB_L2 4
"trk", // SPCTAB_TRK 5
"blkgrp", // SPCTAB_BLKGRP 6
"free", // SPCTAB_FREE 7
"eof", // SPCTAB_EOF 8
"L2LOWER", // SPCTAB_L2LOWER 9
"L2UPPER", // SPCTAB_L2UPPER 10
"data", // SPCTAB_DATA 11
"unknown", // SPCTAB_DATA 12
};
return (spc_typ < _countof( spc_types )) ?
spc_types[ spc_typ ] : "???????";
}
/*-------------------------------------------------------------------*/
/* Toggle the endianness of a compressed file */
/*-------------------------------------------------------------------*/
DLL_EXPORT int cckd_swapend (DEVBLK *dev)
{
CCKD_EXT *cckd; /* -> cckd extension */
int fd; /* File descriptor */
int rc; /* Return code */
struct stat fst; /* File status buffer */
int i; /* Index */
int swapend; /* 1=swap space */
int len; /* Length */
off_t off, lopos, hipos; /* File offsets */
CCKD_DEVHDR cdevhdr; /* Compressed ckd header */
CCKD_L1ENT *l1 = NULL; /* Level 1 table */
CCKD_L2ENT l2[256]; /* Level 2 table */
CCKD_FREEBLK freeblk; /* Free block */
if (dev->cckd64)
return cckd64_swapend( dev );
/* Get fd */
cckd = dev->cckd_ext;
if (cckd == NULL)
fd = dev->fd;
else
fd = cckd->fd[cckd->sfn];
/* Get file size */
if (fstat (fd, &fst) < 0)
goto cswp_fstat_error;
gui_fprintf (stderr, "SIZE=%"PRIu64"\n", (U64) fst.st_size);
hipos = fst.st_size;
/* Device header */
off = CCKD_DEVHDR_POS;
if (lseek (fd, off, SEEK_SET) < 0)
goto cswp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
len = CCKD_DEVHDR_SIZE;
if ((rc = read (fd, &cdevhdr, len)) != len)
goto cswp_read_error;
swapend = (cdevhdr.cdh_opts & CCKD_OPT_BIGEND) != cckd_def_opt_bigend();
cckd_swapend_chdr (&cdevhdr);
cdevhdr.cdh_opts |= CCKD_OPT_OPENRW;
if (lseek (fd, off, SEEK_SET) < 0)
goto cswp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = write (fd, &cdevhdr, len)) != len)
goto cswp_write_error;
if (!swapend)
cckd_swapend_chdr (&cdevhdr);
/* l1 table */
len = cdevhdr.num_L1tab * CCKD_L1ENT_SIZE;
if ((l1 = malloc (len)) == NULL)
goto cswp_malloc_error;
off = CCKD_L1TAB_POS;
if (lseek (fd, off, SEEK_SET) < 0)
goto cswp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = read (fd, l1, len)) != len)
goto cswp_read_error;
cckd_swapend_l1 (l1, (int)cdevhdr.num_L1tab);
if (lseek (fd, off, SEEK_SET) < 0)
goto cswp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = write (fd, l1, len)) != len)
goto cswp_write_error;
if (!swapend)
cckd_swapend_l1 (l1, (int)cdevhdr.num_L1tab);
lopos = CCKD_L1TAB_POS + len;
/* l2 tables */
for (i = 0; i < cdevhdr.num_L1tab; i++)
{
if (0
|| l1[i] == CCKD_NOSIZE
|| l1[i] == CCKD_MAXSIZE
|| l1[i] < lopos
|| l1[i] > hipos - CCKD_L2TAB_SIZE
)
continue;
off = (off_t)l1[i];
if (lseek (fd, off, SEEK_SET) < 0)
goto cswp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
len = CCKD_L2TAB_SIZE;
if ((rc = read (fd, l2, len)) != len)
goto cswp_read_error;
cckd_swapend_l2 (l2);
if (lseek (fd, off, SEEK_SET) < 0)
goto cswp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = write (fd, l2, len)) != len)
goto cswp_write_error;
}
free (l1);
l1 = NULL;
/* free space */
if (cdevhdr.free_off && cdevhdr.free_off >= lopos
&& cdevhdr.free_off <= hipos - CCKD_FREEBLK_SIZE)
{
off = (off_t)cdevhdr.free_off;
if (lseek (fd, off, SEEK_SET) < 0)
goto cswp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
len = CCKD_FREEBLK_SIZE;
if ((rc = read (fd, &freeblk, len)) != len)
goto cswp_read_error;
if (memcmp(&freeblk, "FREE_BLK", 8) == 0)
{
/* New format free space */
for (i = 0; i < cdevhdr.free_num; i++)
{
off += CCKD_FREEBLK_SIZE;
if (off > hipos - CCKD_FREEBLK_SIZE)
break;
if (lseek (fd, off, SEEK_SET) < 0)
goto cswp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = read (fd, &freeblk, len)) != len)
goto cswp_read_error;
cckd_swapend_free (&freeblk);
if (lseek (fd, off, SEEK_SET) < 0)
goto cswp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = write (fd, &freeblk, len)) != len)
goto cswp_write_error;
} /* for each free space */
} /* if new format free space */
else
{
/* Old format free space */
for (i = 0; i < cdevhdr.free_num; i++)
{
if (off < lopos || off > hipos - CCKD_FREEBLK_SIZE)
break;
if (lseek (fd, off, SEEK_SET) < 0)
goto cswp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = read (fd, &freeblk, len)) != len)
goto cswp_read_error;
cckd_swapend_free (&freeblk);
if (lseek (fd, off, SEEK_SET) < 0)
goto cswp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = write (fd, &freeblk, len)) != len)
goto cswp_write_error;
if (!swapend)
cckd_swapend_free (&freeblk);
off = (off_t)freeblk.fb_offnxt;
} /* for each free space */
} /* else old format free space */
} /* if free space */
return 0;
/* error exits */
cswp_fstat_error:
if(dev->batch)
FWRMSG( stdout, HHC00354, "E", LCSS_DEVNUM, dev->filename,
"fstat()", strerror( errno ));
else
WRMSG( HHC00354, "E", LCSS_DEVNUM, dev->filename,
"fstat()", strerror( errno ));
goto cswp_error;
cswp_lseek_error:
if(dev->batch)
FWRMSG( stdout, HHC00355, "E", LCSS_DEVNUM, dev->filename,
"lseek()", off, strerror( errno ));
else
WRMSG( HHC00355, "E", LCSS_DEVNUM, dev->filename,
"lseek()", off, strerror( errno ));
goto cswp_error;
cswp_read_error:
if(dev->batch)
FWRMSG( stdout, HHC00355, "E", LCSS_DEVNUM, dev->filename,
"read()", off, rc < 0 ? strerror( errno ) : "incomplete");
else
WRMSG( HHC00355, "E", LCSS_DEVNUM, dev->filename,
"read()", off, rc < 0 ? strerror( errno ) : "incomplete");
goto cswp_error;
cswp_write_error:
if(dev->batch)
FWRMSG( stdout, HHC00355, "E", LCSS_DEVNUM, dev->filename,
"write()", off, rc < 0 ? strerror( errno ) : "incomplete");
else
WRMSG( HHC00355, "E", LCSS_DEVNUM, dev->filename,
"write()", off, rc < 0 ? strerror( errno ) : "incomplete");
goto cswp_error;
cswp_malloc_error:
{
char buf[64];
MSGBUF( buf, "malloc(%d)", len);
if(dev->batch)
FWRMSG( stdout, HHC00354, "E", LCSS_DEVNUM, dev->filename,
buf, strerror( errno ));
else
WRMSG( HHC00354, "E", LCSS_DEVNUM, dev->filename,
buf, strerror( errno ));
goto cswp_error;
}
cswp_error:
if (l1) free(l1);
return -1;
}
/*-------------------------------------------------------------------*/
/* Should our default file format be CCKD_OPT_BIGEND or not? */
/*-------------------------------------------------------------------*/
/* */
/* Returns 'CCKD_OPT_BIGEND' (true) if we were built for running on */
/* a big-endian system, or 0 (false) if we were built for running on */
/* a little-endian system. */
/* */
/* The idea here is, the default format for our CCKD dasd images */
/* should match the endianness of the system we're running on (i.e. */
/* that we were built for), so that we don't need to swap any of */
/* the fields in any of our dasd control blocks (e.g. compressed */
/* CCKD device header, L1/L2 tables, etc). Instead, we can simply */
/* use them directly, which is simpler and more efficient. */
/* */
/*-------------------------------------------------------------------*/
DLL_EXPORT int cckd_def_opt_bigend()
{
union
{
long l;
char c[ sizeof( long )];
}
u;
u.l = 1;
return u.c[ sizeof( long ) - 1 ] == 1 ? CCKD_OPT_BIGEND : 0;
}
/*-------------------------------------------------------------------*/
/* UNCONDITIONAL endian swap of compressed device header fields */
/*-------------------------------------------------------------------*/
DLL_EXPORT void cckd_swapend_chdr( CCKD_DEVHDR* cdevhdr )
{
/* fix the compressed ckd header */
cdevhdr->cdh_opts ^= CCKD_OPT_BIGEND;
cdevhdr->num_L1tab = SWAP32( cdevhdr->num_L1tab );
cdevhdr->num_L2tab = SWAP32( cdevhdr->num_L2tab );
cdevhdr->cdh_size = SWAP32( cdevhdr->cdh_size );
cdevhdr->cdh_used = SWAP32( cdevhdr->cdh_used );
cdevhdr->free_off = SWAP32( cdevhdr->free_off );
cdevhdr->free_total = SWAP32( cdevhdr->free_total );
cdevhdr->free_largest = SWAP32( cdevhdr->free_largest );
cdevhdr->free_num = SWAP32( cdevhdr->free_num );
cdevhdr->free_imbed = SWAP32( cdevhdr->free_imbed );
cdevhdr->cmp_parm = SWAP16( cdevhdr->cmp_parm );
}
/*-------------------------------------------------------------------*/
/* UNCONDITIONAL endian swap of level 1 table entries */
/*-------------------------------------------------------------------*/
DLL_EXPORT void cckd_swapend_l1( CCKD_L1ENT* l1, int num_L1tab )
{
int i;
for (i = 0; i < num_L1tab; i++)
l1[i] = SWAP32( l1[i] );
}
/*-------------------------------------------------------------------*/
/* UNCONDITIONAL endian swap of all level 2 table entries fields */
/*-------------------------------------------------------------------*/
DLL_EXPORT void cckd_swapend_l2( CCKD_L2ENT* l2 )
{
int i;
for (i = 0; i < 256; i++) // (always 256 entries per L2 table)
{
l2[i].L2_trkoff = SWAP32( l2[i].L2_trkoff );
l2[i].L2_len = SWAP16( l2[i].L2_len );
l2[i].L2_size = SWAP16( l2[i].L2_size );
}
}
/*-------------------------------------------------------------------*/
/* UNCONDITIONAL endian swap of all free space entry fields */
/*-------------------------------------------------------------------*/
DLL_EXPORT void cckd_swapend_free( CCKD_FREEBLK* fb )
{
fb->fb_offnxt = SWAP32( fb->fb_offnxt );
fb->fb_len = SWAP32( fb->fb_len );
}
/*-------------------------------------------------------------------
* Remove all free space from a compressed ckd file
*-------------------------------------------------------------------*/
DLL_EXPORT int cckd_comp (DEVBLK *dev)
{
CCKD_EXT *cckd; /* -> cckd extension */
int fd; /* File descriptor */
struct stat fst; /* File status buffer */
int rc; /* Return code */
off_t off; /* File offset */
off_t l2area; /* Boundary for l2 tables */
int len; /* Length */
int i, j, l, n; /* Work variables */
int relocate = 0; /* 1=spaces will be relocated*/
int l1size; /* l1 table size */
U32 next; /* offset of next space */
int s; /* space table index */
CKD_DEVHDR devhdr; /* CKD device header */
CCKD_DEVHDR cdevhdr; /* CCKD device header */
CCKD_L1ENT *l1=NULL; /* ->L1tab table */
CCKD_L2ENT **l2=NULL; /* ->L2tab table array */
SPCTAB *spctab=NULL; /* -> space table */
BYTE *rbuf=NULL; /* Relocation buffer */
BYTE *p; /* -> relocation buffer */
int rlen=0; /* Relocation buffer length */
CCKD_L2ENT zero_l2[256]; /* Empty l2 table (zeros) */
CCKD_L2ENT ff_l2[256]; /* Empty l2 table (0xff's) */
BYTE buf[65536*4]; /* Buffer */
if (dev->cckd64)
return cckd64_comp( dev );
/*---------------------------------------------------------------
* Get fd
*---------------------------------------------------------------*/
cckd = dev->cckd_ext;
if (cckd == NULL)
fd = dev->fd;
else
fd = cckd->fd[cckd->sfn];
/*---------------------------------------------------------------
* Get file statistics
*---------------------------------------------------------------*/
if (fstat (fd, &fst) < 0)
goto comp_fstat_error;
gui_fprintf (stderr, "SIZE=%"PRIu64"\n", (U64) fst.st_size);
/*---------------------------------------------------------------
* Read device header
*---------------------------------------------------------------*/
off = 0;
if (lseek( fd, off, SEEK_SET ) < 0)
goto comp_lseek_error;
gui_fprintf( stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
len = CKD_DEVHDR_SIZE;
if ((rc = read( fd, &devhdr, len )) != len)
goto comp_read_error;
dev->cckd64 = 0;
if (!(dh_devid_typ( devhdr.dh_devid ) & ANY32_CMP_OR_SF_TYP))
{
if (dh_devid_typ( devhdr.dh_devid ) & ANY64_CMP_OR_SF_TYP)
{
dev->cckd64 = 1;
return cckd64_comp( dev );
}
// "%1d:%04X CCKD file %s: not a compressed dasd file"
if (dev->batch)
FWRMSG( stdout, HHC00356, "E", SSID_TO_LCSS( dev->ssid ),
dev->devnum, dev->filename );
else
WRMSG( HHC00356, "E", LCSS_DEVNUM, dev->filename );
goto comp_error;
}
comp_restart:
/*---------------------------------------------------------------
* Read compressed device header
*---------------------------------------------------------------*/
off = CCKD_DEVHDR_POS;
if (lseek (fd, off, SEEK_SET) < 0)
goto comp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
len = CCKD_DEVHDR_SIZE;
if ((rc = read (fd, &cdevhdr, len)) != len)
goto comp_read_error;
/*---------------------------------------------------------------
* Check the endianness of the file
*---------------------------------------------------------------*/
if ((cdevhdr.cdh_opts & CCKD_OPT_BIGEND) != cckd_def_opt_bigend())
{
if(dev->batch)
// "%1d:%04X CCKD file %s: converting to %s"
FWRMSG( stdout, HHC00357, "I", LCSS_DEVNUM, dev->filename,
(cdevhdr.cdh_opts & CCKD_OPT_BIGEND) ?
"little-endian" : "big-endian" );
else
// "%1d:%04X CCKD file %s: converting to %s"
WRMSG( HHC00357, "I", LCSS_DEVNUM, dev->filename,
(cdevhdr.cdh_opts & CCKD_OPT_BIGEND) ?
"little-endian" : "big-endian" );
if (cckd_swapend (dev) < 0)
goto comp_error;
else
goto comp_restart;
}
/*---------------------------------------------------------------
* Some header checks
*---------------------------------------------------------------*/
if ((off_t)cdevhdr.cdh_size != fst.st_size
|| cdevhdr.cdh_size != cdevhdr.cdh_used || cdevhdr.free_off != 0
|| cdevhdr.free_total != 0 || cdevhdr.free_largest != 0
|| cdevhdr.free_num != 0 || cdevhdr.free_imbed != 0)
relocate = 1;
/*---------------------------------------------------------------
* Build empty l2 tables
*---------------------------------------------------------------*/
memset( &zero_l2, 0, CCKD_L2TAB_SIZE );
if (cdevhdr.cdh_nullfmt != 0)
for (i = 0; i < 256; i++)
zero_l2[i].L2_len = zero_l2[i].L2_size = cdevhdr.cdh_nullfmt;
memset (&ff_l2, 0xff, CCKD_L2TAB_SIZE);
/*---------------------------------------------------------------
* Read the l1 table
*---------------------------------------------------------------*/
l1size = len = cdevhdr.num_L1tab * CCKD_L1ENT_SIZE;
if ((l1 = malloc (len)) == NULL)
goto comp_malloc_error;
off = CCKD_L1TAB_POS;
if (lseek (fd, off, SEEK_SET) < 0)
goto comp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = read (fd, l1, len)) != len)
goto comp_read_error;
/*---------------------------------------------------------------
* Build the space table
*---------------------------------------------------------------*/
n = 1 + 1 + 1 + cdevhdr.num_L1tab + 1;
for (i = 0; i < cdevhdr.num_L1tab; i++)
if (l1[i] != CCKD_NOSIZE && l1[i] != CCKD_MAXSIZE)
n += 256;
len = sizeof(SPCTAB);
if ((spctab = calloc (n, len)) == NULL)
goto comp_calloc_error;
s = 0;
spctab[s].spc_typ = SPCTAB_DEVHDR;
spctab[s].spc_val = -1;
spctab[s].spc_off = 0;
spctab[s].spc_len =
spctab[s].spc_siz = CKD_DEVHDR_SIZE;
s++;
spctab[s].spc_typ = SPCTAB_CDEVHDR;
spctab[s].spc_val = -1;
spctab[s].spc_off = CCKD_DEVHDR_POS;
spctab[s].spc_len =
spctab[s].spc_siz = CCKD_DEVHDR_SIZE;
s++;
spctab[s].spc_typ = SPCTAB_L1;
spctab[s].spc_val = -1;
spctab[s].spc_off = CCKD_L1TAB_POS;
spctab[s].spc_len =
spctab[s].spc_siz = l1size;
s++;
spctab[s].spc_typ = SPCTAB_EOF;
spctab[s].spc_val = -1;
spctab[s].spc_off = (U32)fst.st_size;
spctab[s].spc_len =
spctab[s].spc_siz = 0;
s++;
for (i = 0; i < cdevhdr.num_L1tab; i++)
if (l1[i] != CCKD_NOSIZE && l1[i] != CCKD_MAXSIZE)
{
spctab[s].spc_typ = SPCTAB_L2;
spctab[s].spc_val = i;
spctab[s].spc_off = l1[i];
spctab[s].spc_len =
spctab[s].spc_siz = CCKD_L2TAB_SIZE;
s++;
}
qsort (spctab, s, sizeof(SPCTAB), comp_spctab_sort);
/*---------------------------------------------------------------
* Read level 2 tables
*---------------------------------------------------------------*/
n = cdevhdr.num_L1tab;
len = sizeof (void *);
if ((l2 = calloc (n, len)) == NULL)
goto comp_calloc_error;
for (i = 0; spctab[i].spc_typ != SPCTAB_EOF; i++)
{
if (spctab[i].spc_typ != SPCTAB_L2) continue;
l = spctab[i].spc_val;
len = CCKD_L2TAB_SIZE;
if ((l2[l] = malloc (len)) == NULL)
goto comp_malloc_error;
off = (off_t)spctab[i].spc_off;
if (lseek (fd, off, SEEK_SET) < 0)
goto comp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = read (fd, l2[l], len)) != len)
goto comp_read_error;
for (j = 0; j < 256; j++)
{
if (l2[l][j].L2_trkoff == CCKD_NOSIZE || l2[l][j].L2_trkoff == CCKD_MAXSIZE)
continue;
spctab[s].spc_typ = SPCTAB_TRK;
spctab[s].spc_val = spctab[i].spc_val*256 + j;
spctab[s].spc_off = l2[l][j].L2_trkoff;
spctab[s].spc_len = l2[l][j].L2_len;
spctab[s].spc_siz = l2[l][j].L2_size;
s++;
} /* for each l2 entry */
/* check if empty l2 table */
if (memcmp (l2[l], &zero_l2, CCKD_L2TAB_SIZE) == 0
|| memcmp (l2[l], &ff_l2, CCKD_L2TAB_SIZE) == 0)
{
l1[l] = l2[l][0].L2_trkoff; /* CCKD_NOSIZE or CCKD_MAXSIZE */
spctab[i].spc_typ = SPCTAB_NONE;
free (l2[l]);
l2[l] = NULL;
relocate = 1;
}
} /* for each space */
qsort (spctab, s, sizeof(SPCTAB), comp_spctab_sort);
while (spctab[s-1].spc_typ == SPCTAB_NONE) s--;
/* set relocate flag if last space is free space */
if (spctab[s-2].spc_off + spctab[s-2].spc_len != spctab[s-1].spc_off)
relocate = 1;
/*---------------------------------------------------------------
* relocate l2 tables in order
*---------------------------------------------------------------*/
/* determine l2 area */
l2area = CCKD_L1TAB_POS + l1size;
for (i = 0; i < cdevhdr.num_L1tab; i++)
{
if (l1[i] == CCKD_NOSIZE || l1[i] == CCKD_MAXSIZE)
continue;
if (l1[i] != l2area)
relocate = 1;
l2area += CCKD_L2TAB_SIZE;
}
/* quick return if all l2 tables are orderered and no free space */
if (!relocate)
{
for (i = 1; spctab[i].spc_typ != SPCTAB_EOF; i++)
if (spctab[i-1].spc_off + spctab[i-1].spc_len != spctab[i].spc_off)
break;
if (spctab[i].spc_typ == SPCTAB_EOF)
{
if(dev->batch)
FWRMSG( stdout, HHC00358, "I", LCSS_DEVNUM, dev->filename);
else
WRMSG( HHC00358, "I", LCSS_DEVNUM, dev->filename);
goto comp_return_ok;
}
}
/* file will be updated */
cdevhdr.cdh_opts |= CCKD_OPT_OPENRW;
/* calculate track size within the l2 area */
for (i = rlen = 0; spctab[i].spc_off < l2area; i++)
if (spctab[i].spc_typ == SPCTAB_TRK)
rlen += sizeof(spctab[i].spc_val) + sizeof(spctab[i].spc_len)
+ spctab[i].spc_len;
/* read any tracks in the l2area into rbuf */
if ((len = rlen) > 0)
{
if ((rbuf = malloc (len)) == NULL)
goto comp_malloc_error;
for (i = 0, p = rbuf; spctab[i].spc_off < l2area; i++)
{
if (spctab[i].spc_typ != SPCTAB_TRK) continue;
memcpy (p, &spctab[i].spc_val, sizeof(spctab[i].spc_val));
p += sizeof(spctab[i].spc_val);
memcpy (p, &spctab[i].spc_len, sizeof(spctab[i].spc_len));
p += sizeof(spctab[i].spc_len);
off = (off_t)spctab[i].spc_off;
if (lseek (fd, off, SEEK_SET) < 0)
goto comp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
len = spctab[i].spc_len;
if ((rc = read (fd, p, len)) != len)
goto comp_read_error;
p += len;
spctab[i].spc_typ = SPCTAB_NONE;
} /* for each space in the l2 area */
qsort (spctab, s, sizeof(SPCTAB), comp_spctab_sort);
while (spctab[s-1].spc_typ == SPCTAB_NONE) s--;
} /* if any tracks to relocate */
/* remove all l2 tables from the space table */
for (i = 0; spctab[i].spc_typ != SPCTAB_EOF; i++)
if (spctab[i].spc_typ == SPCTAB_L2)
spctab[i].spc_typ = SPCTAB_NONE;
qsort (spctab, s, sizeof(SPCTAB), comp_spctab_sort);
while (spctab[s-1].spc_typ == SPCTAB_NONE) s--;
/* add all l2 tables at their ordered offsets */
off = CCKD_L1TAB_POS + l1size;
for (i = 0; i < cdevhdr.num_L1tab; i++)
{
if (l1[i] == CCKD_NOSIZE || l1[i] == CCKD_MAXSIZE)
continue;
spctab[s].spc_typ = SPCTAB_L2;
spctab[s].spc_val = i;
spctab[s].spc_off = (U32)off;
spctab[s].spc_len =
spctab[s].spc_siz = CCKD_L2TAB_SIZE;
s++;
off += CCKD_L2TAB_SIZE;
}
qsort (spctab, s, sizeof(SPCTAB), comp_spctab_sort);
/* set end-of-file position */
spctab[s-1].spc_off = spctab[s-2].spc_off + spctab[s-2].spc_len;
/*---------------------------------------------------------------
* Perform compression
*---------------------------------------------------------------*/
/* move spaces left */
for (i = 0; spctab[i].spc_typ != SPCTAB_EOF; i++)
{
/* ignore contiguous spaces */
if (spctab[i].spc_off + spctab[i].spc_len == spctab[i+1].spc_off)
continue;
/* found a gap */
off = (off_t)spctab[i+1].spc_off;
/* figure out how much we can read */
for (len = 0, j = i + 1; spctab[j].spc_typ != SPCTAB_EOF; j++)
{
if (len + spctab[j].spc_len > sizeof(buf))
break;
next = spctab[j].spc_off + spctab[j].spc_len;
spctab[j].spc_off = spctab[i].spc_off + spctab[i].spc_len + len;
spctab[j].spc_siz = spctab[j].spc_len;
len += spctab[j].spc_len;
if (next != spctab[j+1].spc_off)
break;
} /* search for contiguous spaces */
/* this can happen if the next space is end-of-file */
if (len == 0)
continue;
/* read the image(s) to be relocated */
if (lseek (fd, off, SEEK_SET) < 0)
goto comp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = read (fd, buf, len)) != len)
goto comp_write_error;
/* write the images */
off = (off_t)spctab[i].spc_off + spctab[i].spc_len;
if (lseek (fd, off, SEEK_SET) < 0)
goto comp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if ((rc = write (fd, buf, len)) != len)
goto comp_write_error;
}
/* adjust the size of the file */
spctab[s-1].spc_off = spctab[s-2].spc_off + spctab[s-2].spc_len;
/*---------------------------------------------------------------
* Write spaces relocated from the l2area to the end of the file
*---------------------------------------------------------------*/
off = (off_t)spctab[s-1].spc_off;
p = rbuf;
while (rlen)
{
spctab[s].spc_typ = SPCTAB_TRK;
spctab[s].spc_off = (U32)off;
memcpy (&spctab[s].spc_val, p, sizeof(spctab[s].spc_val));
p += sizeof(spctab[s].spc_val);
memcpy (&spctab[s].spc_len, p, sizeof(spctab[s].spc_len));
spctab[s].spc_siz = spctab[s].spc_len;
p += sizeof(spctab[s].spc_len);
if (lseek (fd, off, SEEK_SET) < 0)
goto comp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
len = spctab[s].spc_len;
if ((rc = write (fd, p, len)) != len)
goto comp_write_error;
p += len;
off += len;
rlen -= len + sizeof(spctab[s].spc_val) + sizeof(spctab[s].spc_len);
s++;
} /* for each relocated space in l2area */
/* adjust the space table */
if (rbuf)
{
free (rbuf); rbuf = NULL;
qsort (spctab, s, sizeof(SPCTAB), comp_spctab_sort);
spctab[s-1].spc_off = spctab[s-2].spc_off + spctab[s-2].spc_len;
}
/*---------------------------------------------------------------
* Update the device header
*---------------------------------------------------------------*/
cdevhdr.cdh_size =
cdevhdr.cdh_used = spctab[s-1].spc_off;
cdevhdr.free_off =
cdevhdr.free_total =
cdevhdr.free_largest =
cdevhdr.free_num =
cdevhdr.free_imbed = 0;
cdevhdr.cdh_vrm[0] = CCKD_VERSION;
cdevhdr.cdh_vrm[1] = CCKD_RELEASE;
cdevhdr.cdh_vrm[2] = CCKD_MODLVL;
/*---------------------------------------------------------------
* Update the lookup tables
*---------------------------------------------------------------*/
for (i = 0; spctab[i].spc_typ != SPCTAB_EOF; i++)
if (spctab[i].spc_typ == SPCTAB_L2)
l1[spctab[i].spc_val] = spctab[i].spc_off;
else if (spctab[i].spc_typ == SPCTAB_TRK)
{
l = spctab[i].spc_val / 256;
j = spctab[i].spc_val % 256;
l2[l][j].L2_trkoff = spctab[i].spc_off;
l2[l][j].L2_len =
l2[l][j].L2_size = spctab[i].spc_len;
}
/*---------------------------------------------------------------
* Write the cdevhdr, l1 table and l2 tables
*---------------------------------------------------------------*/
/* write cdevhdr */
off = CCKD_DEVHDR_POS;
if (lseek (fd, off, SEEK_SET) < 0)
goto comp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
len = CCKD_DEVHDR_SIZE;
if ((rc = write (fd, &cdevhdr, len)) != len)
goto comp_write_error;
/* write l1 table */
off = CCKD_L1TAB_POS;
if (lseek (fd, off, SEEK_SET) < 0)
goto comp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
len = l1size;
if ((rc = write (fd, l1, len)) != len)
goto comp_write_error;
/* write l2 tables */
for (i = 0; i < cdevhdr.num_L1tab; i++)
if (l1[i] != CCKD_NOSIZE && l1[i] != CCKD_MAXSIZE)
{
off = (off_t)l1[i];
if (lseek (fd, off, SEEK_SET) < 0)
goto comp_lseek_error;
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
len = CCKD_L2TAB_SIZE;
if ((rc = write (fd, l2[i], len)) != len)
goto comp_lseek_error;
}
/* truncate the file */
off = (off_t)spctab[s-1].spc_off;
if (off < fst.st_size)
{
VERIFY(!ftruncate (fd, off));
if(dev->batch)
FWRMSG( stdout, HHC00359, "I", LCSS_DEVNUM, dev->filename,
fst.st_size - off);
else
WRMSG( HHC00359, "I", LCSS_DEVNUM, dev->filename, fst.st_size - off);
}
else
{
if(dev->batch)
FWRMSG( stdout, HHC00360, "I", LCSS_DEVNUM, dev->filename);
else
WRMSG( HHC00360, "I", LCSS_DEVNUM, dev->filename);
}
/*---------------------------------------------------------------
* Return
*---------------------------------------------------------------*/
comp_return_ok:
rc = 0;
comp_return:
gui_fprintf (stderr, "POS=%"PRIu64"\n", (U64) lseek( fd, 0, SEEK_CUR ));
if (rbuf) free(rbuf);
if (l2)
{
for (i = 0; i < cdevhdr.num_L1tab; i++)
if (l2[i])
free (l2[i]);
free (l2);
}
if (l1) free (l1);
if (spctab) free (spctab);
return rc;
/*---------------------------------------------------------------
* Error exits
*---------------------------------------------------------------*/
comp_fstat_error:
if(dev->batch)
FWRMSG( stdout, HHC00354, "E", LCSS_DEVNUM, dev->filename,
"fstat()", strerror( errno ));
else
WRMSG( HHC00354, "E", LCSS_DEVNUM, dev->filename,
"fstat()", strerror( errno ));
goto comp_error;
comp_lseek_error:
if(dev->batch)
FWRMSG( stdout, HHC00355, "E", LCSS_DEVNUM, dev->filename,
"lseek()", off, strerror( errno ));
else
WRMSG( HHC00355, "E", LCSS_DEVNUM, dev->filename,
"lseek()", off, strerror( errno ));
goto comp_error;
comp_read_error:
if(dev->batch)
FWRMSG( stdout, HHC00355, "E", LCSS_DEVNUM, dev->filename,
"read()", off, rc < 0 ? strerror( errno ) : "incomplete");
else
WRMSG( HHC00355, "E", LCSS_DEVNUM, dev->filename,
"read()", off, rc < 0 ? strerror( errno ) : "incomplete");
goto comp_error;
comp_write_error:
if(dev->batch)
FWRMSG( stdout, HHC00355, "E", LCSS_DEVNUM, dev->filename,
"write()", off, rc < 0 ? strerror( errno ) : "incomplete");
else
WRMSG( HHC00355, "E", LCSS_DEVNUM, dev->filename,
"write()", off, rc < 0 ? strerror( errno ) : "incomplete");
goto comp_error;
comp_malloc_error:
{
char buf[64];
MSGBUF( buf, "malloc(%d)", len);
if(dev->batch)
FWRMSG( stdout, HHC00354, "E", LCSS_DEVNUM, dev->filename,
buf, strerror( errno ));
else
WRMSG( HHC00354, "E", LCSS_DEVNUM, dev->filename,
buf, strerror( errno ));
goto comp_error;
}
comp_calloc_error:
{
char buf[64];
MSGBUF( buf, "calloc(%d)", n * len);
if(dev->batch)
FWRMSG( stdout, HHC00354, "E", LCSS_DEVNUM, dev->filename,
buf, strerror( errno ));
else
WRMSG( HHC00354, "E", LCSS_DEVNUM, dev->filename,
buf, strerror( errno ));
goto comp_error;
}
comp_error:
rc = -1;
goto comp_return;
} /* cckd_comp() */
/*-------------------------------------------------------------------
* cckd_comp() space table sort
*-------------------------------------------------------------------*/
static int comp_spctab_sort(const void *a, const void *b)
{
const SPCTAB *x = a, *y = b;
if (x->spc_typ == SPCTAB_NONE) return +1;
else if (y->spc_typ == SPCTAB_NONE) return -1;
else if (x->spc_typ == SPCTAB_EOF) return +1;
else if (y->spc_typ == SPCTAB_EOF) return -1;
else if (x->spc_off < y->spc_off) return -1;
else return +1;