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/****************************************************************
* *
* Copyright 2001, 2012 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "gtm_string.h"
#include <sys/sem.h>
#include "gtm_fcntl.h"
#include "gtm_unistd.h"
#include <errno.h>
#include <stddef.h>
#ifdef __MVS__
#include "gtm_zos_io.h"
#endif
#include "gdsroot.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsbt.h"
#include "gdsfhead.h"
#include "filestruct.h"
#include "eintr_wrappers.h"
#include "gtmio.h"
#include "iosp.h"
#include "is_file_identical.h"
#include "dbfilop.h"
#include "anticipatory_freeze.h"
#include "jnl.h"
GBLREF gd_region *gv_cur_region;
error_def(ERR_DBFILOPERR);
error_def(ERR_DBNOTGDS);
error_def(ERR_DBOPNERR);
error_def(ERR_DBPREMATEOF);
error_def(ERR_TEXT);
ZOS_ONLY(error_def(ERR_BADTAG);)
uint4 dbfilop(file_control *fc)
{
unix_db_info *udi;
struct stat stat_buf;
int4 save_errno;
int fstat_res;
sgmnt_data_ptr_t csd;
ZOS_ONLY(int realfiletag;)
/* assert((dba_mm == fc->file_type) || (dba_bg == fc->file_type)); not always set in unix */
udi = (unix_db_info *)fc->file_info;
switch(fc->op)
{
case FC_READ:
assert(fc->op_pos > 0); /* gt.m uses the vms convention of numbering the blocks from 1 */
LSEEKREAD(udi->fd,
(off_t)(fc->op_pos - 1) * DISK_BLOCK_SIZE,
fc->op_buff,
fc->op_len,
save_errno);
if (0 != save_errno)
{
if (-1 == save_errno)
rts_error(VARLSTCNT(4) ERR_DBPREMATEOF, 2, LEN_AND_STR(udi->fn));
else
rts_error(VARLSTCNT(5) ERR_DBFILOPERR, 2, LEN_AND_STR(udi->fn), save_errno);
}
if (1 == fc->op_pos)
{
if (0 != memcmp(fc->op_buff, GDS_LABEL, GDS_LABEL_SZ - 3))
rts_error(VARLSTCNT(4) ERR_DBNOTGDS, 2, LEN_AND_STR(udi->fn));
if (0 == memcmp(fc->op_buff, GDS_LABEL, GDS_LABEL_SZ - 1)) /* current GDS */
{
csd = (sgmnt_data_ptr_t)fc->op_buff;
if (offsetof(sgmnt_data, minor_dbver) < fc->op_len)
CHECK_DB_ENDIAN((sgmnt_data_ptr_t)fc->op_buff, strlen(udi->fn), udi->fn);
}
}
break;
case FC_WRITE:
if ((1 == fc->op_pos) && ((0 != memcmp(fc->op_buff, GDS_LABEL, GDS_LABEL_SZ - 1))
|| (0 == ((sgmnt_data_ptr_t)fc->op_buff)->acc_meth)))
GTMASSERT;
assert((1 != fc->op_pos) || fc->op_len <= SIZEOF_FILE_HDR(fc->op_buff));
DB_LSEEKWRITE(&udi->s_addrs, udi->fn, udi->fd,
(off_t)(fc->op_pos - 1) * DISK_BLOCK_SIZE,
fc->op_buff,
fc->op_len,
save_errno);
if (0 != save_errno)
rts_error(VARLSTCNT(5) ERR_DBFILOPERR, 2, LEN_AND_STR(udi->fn), save_errno);
break;
case FC_OPEN:
gv_cur_region->read_only = FALSE; /* maintain csa->read_write simultaneously */
udi->s_addrs.read_write = TRUE; /* maintain reg->read_only simultaneously */
if (FD_INVALID == (udi->fd = OPEN((char *)gv_cur_region->dyn.addr->fname, O_RDWR)))
{
if (FD_INVALID == (udi->fd = OPEN((char *)gv_cur_region->dyn.addr->fname, O_RDONLY)))
return ERR_DBOPNERR;
gv_cur_region->read_only = TRUE; /* maintain csa->read_write simultaneously */
udi->s_addrs.read_write = FALSE; /* maintain reg->read_only simultaneously */
}
FSTAT_FILE(udi->fd, &stat_buf, fstat_res);
if (-1 == fstat_res)
return ERR_DBOPNERR;
#ifdef __MVS__
if (-1 == gtm_zos_tag_to_policy(udi->fd, TAG_BINARY, &realfiletag))
TAG_POLICY_SEND_MSG((char_ptr_t)gv_cur_region->dyn.addr->fname, errno,
realfiletag, TAG_BINARY);
#endif
set_gdid_from_stat(&udi->fileid, &stat_buf);
udi->raw = (S_ISCHR(stat_buf.st_mode) || S_ISBLK(stat_buf.st_mode));
udi->fn = (char *)gv_cur_region->dyn.addr->fname;
break;
case FC_CLOSE:
CLOSEFILE_RESET(udi->fd, save_errno); /* resets "udi->fd" to FD_INVALID */
if (0 != save_errno)
rts_error(VARLSTCNT(5) ERR_DBFILOPERR, 2, LEN_AND_STR(udi->fn), save_errno);
break;
default:
GTMASSERT;
}
return SS_NORMAL;
}
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