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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997, 1998
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)log_register.c 10.18 (Sleepycat) 5/3/98";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <errno.h>
#include <string.h>
#endif
#include "db_int.h"
#include "shqueue.h"
#include "log.h"
#include "common_ext.h"
/*
* log_register --
* Register a file name.
*/
int
log_register(dblp, dbp, name, type, idp)
DB_LOG *dblp;
DB *dbp;
const char *name;
DBTYPE type;
u_int32_t *idp;
{
DBT fid_dbt, r_name;
DB_LSN r_unused;
FNAME *fnp;
size_t len;
u_int32_t fid;
int inserted, ret;
char *fullname;
void *namep;
fid = 0;
inserted = 0;
fullname = NULL;
fnp = namep = NULL;
/* Check the arguments. */
if (type != DB_BTREE && type != DB_HASH && type != DB_RECNO) {
__db_err(dblp->dbenv, "log_register: unknown DB file type");
return (EINVAL);
}
/* Get the log file id. */
if ((ret = __db_appname(dblp->dbenv,
DB_APP_DATA, NULL, name, 0, NULL, &fullname)) != 0)
return (ret);
LOCK_LOGREGION(dblp);
/*
* See if we've already got this file in the log, finding the
* next-to-lowest file id currently in use as we do it.
*/
for (fid = 1, fnp = SH_TAILQ_FIRST(&dblp->lp->fq, __fname);
fnp != NULL; fnp = SH_TAILQ_NEXT(fnp, q, __fname)) {
if (fid <= fnp->id)
fid = fnp->id + 1;
if (!memcmp(dbp->lock.fileid, fnp->ufid, DB_FILE_ID_LEN)) {
++fnp->ref;
fid = fnp->id;
goto found;
}
}
/* Allocate a new file name structure. */
if ((ret = __db_shalloc(dblp->addr, sizeof(FNAME), 0, &fnp)) != 0)
goto err;
fnp->ref = 1;
fnp->id = fid;
fnp->s_type = type;
memcpy(fnp->ufid, dbp->lock.fileid, DB_FILE_ID_LEN);
len = strlen(name) + 1;
if ((ret = __db_shalloc(dblp->addr, len, 0, &namep)) != 0)
goto err;
fnp->name_off = R_OFFSET(dblp, namep);
memcpy(namep, name, len);
SH_TAILQ_INSERT_HEAD(&dblp->lp->fq, fnp, q, __fname);
inserted = 1;
found: /* Log the registry. */
if (!F_ISSET(dblp, DB_AM_RECOVER)) {
r_name.data = (void *)name; /* XXX: Yuck! */
r_name.size = strlen(name) + 1;
memset(&fid_dbt, 0, sizeof(fid_dbt));
fid_dbt.data = dbp->lock.fileid;
fid_dbt.size = DB_FILE_ID_LEN;
if ((ret = __log_register_log(dblp, NULL, &r_unused,
0, LOG_OPEN, &r_name, &fid_dbt, fid, type)) != 0)
goto err;
if ((ret = __log_add_logid(dblp, dbp, fid)) != 0)
goto err;
}
if (0) {
err: /*
* XXX
* We should grow the region.
*/
if (inserted)
SH_TAILQ_REMOVE(&dblp->lp->fq, fnp, q, __fname);
if (namep != NULL)
__db_shalloc_free(dblp->addr, namep);
if (fnp != NULL)
__db_shalloc_free(dblp->addr, fnp);
}
UNLOCK_LOGREGION(dblp);
if (fullname != NULL)
FREES(fullname);
if (idp != NULL)
*idp = fid;
return (ret);
}
/*
* log_unregister --
* Discard a registered file name.
*/
int
log_unregister(dblp, fid)
DB_LOG *dblp;
u_int32_t fid;
{
DBT fid_dbt, r_name;
DB_LSN r_unused;
FNAME *fnp;
int ret;
ret = 0;
LOCK_LOGREGION(dblp);
/* Find the entry in the log. */
for (fnp = SH_TAILQ_FIRST(&dblp->lp->fq, __fname);
fnp != NULL; fnp = SH_TAILQ_NEXT(fnp, q, __fname))
if (fid == fnp->id)
break;
if (fnp == NULL) {
__db_err(dblp->dbenv, "log_unregister: non-existent file id");
ret = EINVAL;
goto ret1;
}
/* Unlog the registry. */
if (!F_ISSET(dblp, DB_AM_RECOVER)) {
memset(&r_name, 0, sizeof(r_name));
r_name.data = R_ADDR(dblp, fnp->name_off);
r_name.size = strlen(r_name.data) + 1;
memset(&fid_dbt, 0, sizeof(fid_dbt));
fid_dbt.data = fnp->ufid;
fid_dbt.size = DB_FILE_ID_LEN;
if ((ret = __log_register_log(dblp, NULL, &r_unused,
0, LOG_CLOSE, &r_name, &fid_dbt, fid, fnp->s_type)) != 0)
goto ret1;
}
/*
* If more than 1 reference, just decrement the reference and return.
* Otherwise, free the unique file information, name and structure.
*/
if (fnp->ref > 1)
--fnp->ref;
else {
__db_shalloc_free(dblp->addr, R_ADDR(dblp, fnp->name_off));
SH_TAILQ_REMOVE(&dblp->lp->fq, fnp, q, __fname);
__db_shalloc_free(dblp->addr, fnp);
}
/*
* Remove from the process local table. If this operation is taking
* place during recovery, then the logid was never added to the table,
* so do not remove it.
*/
if (!F_ISSET(dblp, DB_AM_RECOVER))
__log_rem_logid(dblp, fid);
ret1: UNLOCK_LOGREGION(dblp);
return (ret);
}
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