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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2001, 2015 Oracle and/or its affiliates. All rights reserved.
*
* $Id$
*/
#include "db_config.h"
#include "db_int.h"
#include "dbinc/db_page.h"
#include "dbinc/btree.h"
#include "dbinc/hash.h"
#include "dbinc/heap.h"
#include "dbinc/qam.h"
#include "dbinc/lock.h"
#include "dbinc/partition.h"
#include "dbinc/txn.h"
static int __db_cursor_check_func
__P((DBC *, DBC *, u_int32_t *, db_pgno_t, u_int32_t, void *));
static int __db_cursor_check __P((DB *));
/*
* __db_truncate_pp
* DB->truncate pre/post processing.
*
* PUBLIC: int __db_truncate_pp __P((DB *, DB_TXN *, u_int32_t *, u_int32_t));
*/
int
__db_truncate_pp(dbp, txn, countp, flags)
DB *dbp;
DB_TXN *txn;
u_int32_t *countp, flags;
{
DB_THREAD_INFO *ip;
ENV *env;
int handle_check, ret, t_ret, txn_local;
env = dbp->env;
handle_check = txn_local = 0;
STRIP_AUTO_COMMIT(flags);
/* Check for invalid flags. */
if (F_ISSET(dbp, DB_AM_SECONDARY)) {
__db_errx(env, DB_STR("0685",
"DB->truncate forbidden on secondary indices"));
return (EINVAL);
}
if ((ret = __db_fchk(env, "DB->truncate", flags, 0)) != 0)
return (ret);
ENV_ENTER(env, ip);
XA_CHECK_TXN(ip, txn);
/*
* Make sure there are no active cursors on this db. Since we drop
* pages we cannot really adjust cursors.
*/
if ((ret = __db_cursor_check(dbp)) != 0) {
__db_errx(env, DB_STR("0686",
"DB->truncate not permitted with active cursors"));
goto err;
}
#ifdef CONFIG_TEST
if (IS_REP_MASTER(env))
DB_TEST_WAIT(env, env->test_check);
#endif
/* Check for replication block. */
handle_check = IS_ENV_REPLICATED(env);
if (handle_check &&
(ret = __db_rep_enter(dbp, 1, 0, IS_REAL_TXN(txn))) != 0) {
handle_check = 0;
goto err;
}
/*
* Check for changes to a read-only database. This must be after the
* replication block so that we cannot race master/client state changes.
*/
if (DB_IS_READONLY(dbp)) {
ret = __db_rdonly(env, "DB->truncate");
goto err;
}
/*
* Create local transaction as necessary, check for consistent
* transaction usage.
*/
if (IS_DB_AUTO_COMMIT(dbp, txn)) {
if ((ret = __txn_begin(env, ip, NULL, &txn, 0)) != 0)
goto err;
txn_local = 1;
}
/* Check for consistent transaction usage. */
if ((ret = __db_check_txn(dbp, txn, DB_LOCK_INVALIDID, 0)) != 0)
goto err;
ret = __db_truncate(dbp, ip, txn, countp);
err: if (txn_local &&
(t_ret = __db_txn_auto_resolve(env, txn, 0, ret)) && ret == 0)
ret = t_ret;
/* Release replication block. */
if (handle_check && (t_ret = __env_db_rep_exit(env)) != 0 && ret == 0)
ret = t_ret;
ENV_LEAVE(env, ip);
return (ret);
}
/*
* __db_truncate
* DB->truncate.
*
* PUBLIC: int __db_truncate __P((DB *, DB_THREAD_INFO *, DB_TXN *,
* PUBLIC: u_int32_t *));
*/
int
__db_truncate(dbp, ip, txn, countp)
DB *dbp;
DB_THREAD_INFO *ip;
DB_TXN *txn;
u_int32_t *countp;
{
DB *sdbp;
DBC *dbc;
ENV *env;
u_int32_t scount;
int ret, t_ret;
env = dbp->env;
dbc = NULL;
ret = 0;
/*
* Run through all secondaries and truncate them first. The count
* returned is the count of the primary only. QUEUE uses normal
* processing to truncate so it will update the secondaries normally.
*/
if (dbp->type != DB_QUEUE && DB_IS_PRIMARY(dbp)) {
if ((ret = __db_s_first(dbp, &sdbp)) != 0)
return (ret);
for (; sdbp != NULL && ret == 0; ret = __db_s_next(&sdbp, txn))
if ((ret = __db_truncate(sdbp, ip, txn, &scount)) != 0)
break;
if (sdbp != NULL)
(void)__db_s_done(sdbp, txn);
if (ret != 0)
return (ret);
}
DB_TEST_RECOVERY(dbp, DB_TEST_PREDESTROY, ret, NULL);
/* Acquire a cursor. */
if ((ret = __db_cursor(dbp, ip, txn, &dbc, 0)) != 0)
return (ret);
DEBUG_LWRITE(dbc, txn, "DB->truncate", NULL, NULL, 0);
#ifdef HAVE_PARTITION
if (DB_IS_PARTITIONED(dbp))
ret = __part_truncate(dbc, countp);
else
#endif
switch (dbp->type) {
case DB_BTREE:
case DB_RECNO:
ret = __bam_truncate(dbc, countp);
break;
case DB_HASH:
ret = __ham_truncate(dbc, countp);
break;
case DB_HEAP:
ret = __heap_truncate(dbc, countp);
break;
case DB_QUEUE:
ret = __qam_truncate(dbc, countp);
break;
case DB_UNKNOWN:
default:
ret = __db_unknown_type(env, "DB->truncate", dbp->type);
break;
}
/* Discard the cursor. */
if (dbc != NULL && (t_ret = __dbc_close(dbc)) != 0 && ret == 0)
ret = t_ret;
/* Delete all blob files. */
if (ret == 0)
ret = __blob_del_all(dbp, txn, 1);
DB_TEST_RECOVERY(dbp, DB_TEST_POSTDESTROY, ret, NULL);
DB_TEST_RECOVERY_LABEL
return (ret);
}
static int
__db_cursor_check_func(dbc, my_dbc, foundp, pgno, indx, args)
DBC *dbc, *my_dbc;
u_int32_t *foundp;
db_pgno_t pgno;
u_int32_t indx;
void *args;
{
COMPQUIET(my_dbc, NULL);
COMPQUIET(args, NULL);
COMPQUIET(pgno, 0);
COMPQUIET(indx, 0);
if (IS_INITIALIZED(dbc)) {
*foundp = 1;
return (EEXIST);
}
return (0);
}
/*
* __db_cursor_check --
* See if there are any active cursors on this db.
*/
static int
__db_cursor_check(dbp)
DB *dbp;
{
int ret;
u_int32_t found;
ret = __db_walk_cursors(dbp, NULL,
__db_cursor_check_func, &found, 0, 0, NULL);
return (ret == EEXIST ? EINVAL : ret);
}
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