#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: txn.c,v 1.2 2004/03/30 01:24:47 jtownsen Exp $";
#endif
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <stdlib.h>
#if TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif
#include <string.h>
#endif
#include "db_int.h"
#include "dbinc/crypto.h"
#include "dbinc/hmac.h"
#include "dbinc/db_page.h"
#include "dbinc/db_shash.h"
#include "dbinc/hash.h"
#include "dbinc/lock.h"
#include "dbinc/log.h"
#include "dbinc/mp.h"
#include "dbinc/txn.h"
#define SET_LOG_FLAGS(dbenv, txnp, lflags) \
do { \
lflags = DB_LOG_COMMIT | DB_LOG_PERM; \
if (F_ISSET(txnp, TXN_SYNC)) \
lflags |= DB_FLUSH; \
else if (!F_ISSET(txnp, TXN_NOSYNC) && \
!F_ISSET(dbenv, DB_ENV_TXN_NOSYNC)) { \
if (F_ISSET(dbenv, DB_ENV_TXN_WRITE_NOSYNC)) \
lflags |= DB_LOG_WRNOSYNC; \
else \
lflags |= DB_FLUSH; \
} \
} while (0)
typedef enum {
TXN_OP_ABORT,
TXN_OP_COMMIT,
TXN_OP_DISCARD,
TXN_OP_PREPARE
} txnop_t;
static int __txn_abort_pp __P((DB_TXN *));
static int __txn_begin_int __P((DB_TXN *, int));
static int __txn_commit_pp __P((DB_TXN *, u_int32_t));
static int __txn_discard_pp __P((DB_TXN *, u_int32_t));
static int __txn_end __P((DB_TXN *, int));
static int __txn_isvalid __P((const DB_TXN *, TXN_DETAIL **, txnop_t));
static int __txn_undo __P((DB_TXN *));
static int __txn_dispatch_undo __P((DB_ENV *,
DB_TXN *, DBT *, DB_LSN *, void *));
int
__txn_begin_pp(dbenv, parent, txnpp, flags)
DB_ENV *dbenv;
DB_TXN *parent, **txnpp;
u_int32_t flags;
{
int rep_check, ret;
PANIC_CHECK(dbenv);
ENV_REQUIRES_CONFIG(dbenv, dbenv->tx_handle, "txn_begin", DB_INIT_TXN);
if ((ret = __db_fchk(dbenv,
"txn_begin", flags,
DB_DIRTY_READ | DB_TXN_NOWAIT |
DB_TXN_NOSYNC | DB_TXN_SYNC)) != 0)
return (ret);
if ((ret = __db_fcchk(dbenv,
"txn_begin", flags, DB_TXN_NOSYNC, DB_TXN_SYNC)) != 0)
return (ret);
if (parent == NULL) {
rep_check = IS_ENV_REPLICATED(dbenv) ? 1 : 0;
if (rep_check)
__op_rep_enter(dbenv);
} else
rep_check = 0;
ret = __txn_begin(dbenv, parent, txnpp, flags);
if (ret != 0 && rep_check)
__op_rep_exit(dbenv);
return (ret);
}
int
__txn_begin(dbenv, parent, txnpp, flags)
DB_ENV *dbenv;
DB_TXN *parent, **txnpp;
u_int32_t flags;
{
DB_LOCKREGION *region;
DB_TXN *txn;
int ret;
*txnpp = NULL;
if ((ret = __os_calloc(dbenv, 1, sizeof(DB_TXN), &txn)) != 0)
return (ret);
txn->mgrp = dbenv->tx_handle;
txn->parent = parent;
TAILQ_INIT(&txn->kids);
TAILQ_INIT(&txn->events);
STAILQ_INIT(&txn->logs);
txn->flags = TXN_MALLOC;
if (LF_ISSET(DB_DIRTY_READ))
F_SET(txn, TXN_DIRTY_READ);
if (LF_ISSET(DB_TXN_NOSYNC))
F_SET(txn, TXN_NOSYNC);
if (LF_ISSET(DB_TXN_SYNC))
F_SET(txn, TXN_SYNC);
if (LF_ISSET(DB_TXN_NOWAIT))
F_SET(txn, TXN_NOWAIT);
if ((ret = __txn_begin_int(txn, 0)) != 0)
goto err;
if (parent != NULL)
TAILQ_INSERT_HEAD(&parent->kids, txn, klinks);
if (LOCKING_ON(dbenv)) {
region = ((DB_LOCKTAB *)dbenv->lk_handle)->reginfo.primary;
if (parent != NULL) {
ret = __lock_inherit_timeout(dbenv,
parent->txnid, txn->txnid);
if (ret == EINVAL) {
parent = NULL;
ret = 0;
}
if (ret != 0)
goto err;
}
if (parent == NULL && region->tx_timeout != 0)
if ((ret = __lock_set_timeout(dbenv, txn->txnid,
region->tx_timeout, DB_SET_TXN_TIMEOUT)) != 0)
goto err;
}
*txnpp = txn;
return (0);
err:
__os_free(dbenv, txn);
return (ret);
}
int
__txn_xa_begin(dbenv, txn)
DB_ENV *dbenv;
DB_TXN *txn;
{
PANIC_CHECK(dbenv);
txn->mgrp = dbenv->tx_handle;
TAILQ_INIT(&txn->kids);
TAILQ_INIT(&txn->events);
STAILQ_INIT(&txn->logs);
txn->parent = NULL;
ZERO_LSN(txn->last_lsn);
txn->txnid = TXN_INVALID;
txn->tid = 0;
txn->cursors = 0;
memset(&txn->lock_timeout, 0, sizeof(db_timeout_t));
memset(&txn->expire, 0, sizeof(db_timeout_t));
return (__txn_begin_int(txn, 0));
}
int
__txn_compensate_begin(dbenv, txnpp)
DB_ENV *dbenv;
DB_TXN **txnpp;
{
DB_TXN *txn;
int ret;
PANIC_CHECK(dbenv);
if ((ret = __os_calloc(dbenv, 1, sizeof(DB_TXN), &txn)) != 0)
return (ret);
txn->mgrp = dbenv->tx_handle;
TAILQ_INIT(&txn->kids);
TAILQ_INIT(&txn->events);
STAILQ_INIT(&txn->logs);
txn->flags = TXN_COMPENSATE | TXN_MALLOC;
*txnpp = txn;
return (__txn_begin_int(txn, 1));
}
static int
__txn_begin_int(txn, internal)
DB_TXN *txn;
int internal;
{
DB_ENV *dbenv;
DB_LSN begin_lsn, null_lsn;
DB_TXNMGR *mgr;
DB_TXNREGION *region;
TXN_DETAIL *td;
size_t off;
u_int32_t id, *ids;
int nids, ret;
mgr = txn->mgrp;
dbenv = mgr->dbenv;
region = mgr->reginfo.primary;
if (DBENV_LOGGING(dbenv))
__log_txn_lsn(dbenv, &begin_lsn, NULL, NULL);
else
ZERO_LSN(begin_lsn);
R_LOCK(dbenv, &mgr->reginfo);
if (!F_ISSET(txn, TXN_COMPENSATE) && F_ISSET(region, TXN_IN_RECOVERY)) {
__db_err(dbenv, "operation not permitted during recovery");
ret = EINVAL;
goto err;
}
if (!internal && region->stat.st_nrestores != 0) {
__db_err(dbenv,
"recovery of prepared but not yet committed transactions is incomplete");
ret = EINVAL;
goto err;
}
if (region->last_txnid == TXN_MAXIMUM &&
region->cur_maxid != TXN_MAXIMUM)
region->last_txnid = TXN_MINIMUM - 1;
if (region->last_txnid == region->cur_maxid) {
if ((ret = __os_malloc(dbenv,
sizeof(u_int32_t) * region->maxtxns, &ids)) != 0)
goto err;
nids = 0;
for (td = SH_TAILQ_FIRST(®ion->active_txn, __txn_detail);
td != NULL;
td = SH_TAILQ_NEXT(td, links, __txn_detail))
ids[nids++] = td->txnid;
region->last_txnid = TXN_MINIMUM - 1;
region->cur_maxid = TXN_MAXIMUM;
if (nids != 0)
__db_idspace(ids, nids,
®ion->last_txnid, ®ion->cur_maxid);
__os_free(dbenv, ids);
if (DBENV_LOGGING(dbenv) &&
(ret = __txn_recycle_log(dbenv, NULL,
&null_lsn, 0, region->last_txnid, region->cur_maxid)) != 0)
goto err;
}
if ((ret =
__db_shalloc(mgr->reginfo.addr, sizeof(TXN_DETAIL), 0, &td)) != 0) {
__db_err(dbenv,
"Unable to allocate memory for transaction detail");
goto err;
}
SH_TAILQ_INSERT_HEAD(®ion->active_txn, td, links, __txn_detail);
id = ++region->last_txnid;
++region->stat.st_nbegins;
if (++region->stat.st_nactive > region->stat.st_maxnactive)
region->stat.st_maxnactive = region->stat.st_nactive;
td->txnid = id;
ZERO_LSN(td->last_lsn);
td->begin_lsn = begin_lsn;
if (txn->parent != NULL)
td->parent = txn->parent->off;
else
td->parent = INVALID_ROFF;
td->status = TXN_RUNNING;
td->flags = 0;
td->xa_status = 0;
off = R_OFFSET(&mgr->reginfo, td);
R_UNLOCK(dbenv, &mgr->reginfo);
ZERO_LSN(txn->last_lsn);
txn->txnid = id;
txn->off = (u_int32_t)off;
txn->abort = __txn_abort_pp;
txn->commit = __txn_commit_pp;
txn->discard = __txn_discard_pp;
txn->id = __txn_id;
txn->prepare = __txn_prepare;
txn->set_timeout = __txn_set_timeout;
if (txn->parent != NULL && LOCKING_ON(dbenv))
if ((ret = __lock_addfamilylocker(dbenv,
txn->parent->txnid, txn->txnid)) != 0)
return (ret);
if (F_ISSET(txn, TXN_MALLOC)) {
MUTEX_THREAD_LOCK(dbenv, mgr->mutexp);
TAILQ_INSERT_TAIL(&mgr->txn_chain, txn, links);
MUTEX_THREAD_UNLOCK(dbenv, mgr->mutexp);
}
return (0);
err: R_UNLOCK(dbenv, &mgr->reginfo);
return (ret);
}
static int
__txn_commit_pp(txnp, flags)
DB_TXN *txnp;
u_int32_t flags;
{
DB_ENV *dbenv;
int not_child, ret;
dbenv = txnp->mgrp->dbenv;
not_child = txnp->parent == NULL;
ret = __txn_commit(txnp, flags);
if (not_child && IS_ENV_REPLICATED(dbenv))
__op_rep_exit(dbenv);
return (ret);
}
int
__txn_commit(txnp, flags)
DB_TXN *txnp;
u_int32_t flags;
{
DBT list_dbt;
DB_ENV *dbenv;
DB_LOCKREQ request;
DB_TXN *kid;
TXN_DETAIL *td;
u_int32_t lflags;
int ret, t_ret;
dbenv = txnp->mgrp->dbenv;
PANIC_CHECK(dbenv);
if ((ret = __txn_isvalid(txnp, &td, TXN_OP_COMMIT)) != 0)
return (ret);
if (__db_fchk(dbenv,
"DB_TXN->commit", flags, DB_TXN_NOSYNC | DB_TXN_SYNC) != 0)
flags = DB_TXN_SYNC;
if (__db_fcchk(dbenv,
"DB_TXN->commit", flags, DB_TXN_NOSYNC, DB_TXN_SYNC) != 0)
flags = DB_TXN_SYNC;
if (LF_ISSET(DB_TXN_NOSYNC)) {
F_CLR(txnp, TXN_SYNC);
F_SET(txnp, TXN_NOSYNC);
}
if (LF_ISSET(DB_TXN_SYNC)) {
F_CLR(txnp, TXN_NOSYNC);
F_SET(txnp, TXN_SYNC);
}
while ((kid = TAILQ_FIRST(&txnp->kids)) != NULL)
if ((ret = __txn_commit(kid, flags)) != 0)
while ((kid = TAILQ_FIRST(&txnp->kids)) != NULL)
if ((t_ret = __txn_abort(kid)) != 0)
return (__db_panic(dbenv, t_ret));
if (DBENV_LOGGING(dbenv) && (!IS_ZERO_LSN(txnp->last_lsn) ||
STAILQ_FIRST(&txnp->logs) != NULL)) {
if (txnp->parent == NULL) {
if ((ret =
__txn_doevents(dbenv, txnp, TXN_PREPARE, 1)) != 0)
goto err;
memset(&request, 0, sizeof(request));
if (LOCKING_ON(dbenv)) {
request.op = DB_LOCK_PUT_READ;
if (IS_REP_MASTER(dbenv) &&
!IS_ZERO_LSN(txnp->last_lsn)) {
memset(&list_dbt, 0, sizeof(list_dbt));
request.obj = &list_dbt;
}
ret = __lock_vec(dbenv,
txnp->txnid, 0, &request, 1, NULL);
}
if (ret == 0 && !IS_ZERO_LSN(txnp->last_lsn)) {
SET_LOG_FLAGS(dbenv, txnp, lflags);
ret = __txn_regop_log(dbenv, txnp,
&txnp->last_lsn, lflags, TXN_COMMIT,
(int32_t)time(NULL), request.obj);
}
if (request.obj != NULL && request.obj->data != NULL)
__os_free(dbenv, request.obj->data);
if (ret != 0)
goto err;
} else {
if (!IS_ZERO_LSN(txnp->last_lsn) &&
(ret = __txn_child_log(dbenv,
txnp->parent, &txnp->parent->last_lsn,
0, txnp->txnid, &txnp->last_lsn)) != 0) {
goto err;
}
if (STAILQ_FIRST(&txnp->logs) != NULL) {
STAILQ_CONCAT(&txnp->logs, &txnp->parent->logs);
txnp->parent->logs = txnp->logs;
STAILQ_INIT(&txnp->logs);
}
F_SET(txnp->parent, TXN_CHILDCOMMIT);
}
}
if (txnp->txn_list != NULL) {
t_ret = __db_do_the_limbo(dbenv,
NULL, txnp, txnp->txn_list, LIMBO_NORMAL);
__db_txnlist_end(dbenv, txnp->txn_list);
txnp->txn_list = NULL;
if (t_ret != 0 && ret == 0)
ret = t_ret;
}
if (ret != 0)
goto err;
return (__txn_end(txnp, 1));
err:
if (td->status == TXN_PREPARED)
return (__db_panic(dbenv, ret));
if ((t_ret = __txn_abort(txnp)) != 0)
ret = t_ret;
return (ret);
}
static int
__txn_abort_pp(txnp)
DB_TXN *txnp;
{
DB_ENV *dbenv;
int not_child, ret;
dbenv = txnp->mgrp->dbenv;
not_child = txnp->parent == NULL;
ret = __txn_abort(txnp);
if (not_child && IS_ENV_REPLICATED(dbenv))
__op_rep_exit(dbenv);
return (ret);
}
int
__txn_abort(txnp)
DB_TXN *txnp;
{
DB_ENV *dbenv;
DB_LOCKREQ request;
DB_TXN *kid;
TXN_DETAIL *td;
u_int32_t lflags;
int ret;
dbenv = txnp->mgrp->dbenv;
PANIC_CHECK(dbenv);
if ((ret = __txn_isvalid(txnp, &td, TXN_OP_ABORT)) != 0)
return (__db_panic(dbenv, ret));
while ((kid = TAILQ_FIRST(&txnp->kids)) != NULL)
if ((ret = __txn_abort(kid)) != 0)
return (ret);
if (LOCKING_ON(dbenv)) {
if ((ret = __txn_doevents(dbenv, txnp, TXN_ABORT, 1)) != 0)
return (__db_panic(dbenv, ret));
if ((ret = __lock_set_timeout(dbenv,
txnp->txnid, 0, DB_SET_TXN_TIMEOUT)) != 0)
return (__db_panic(dbenv, ret));
if ((ret = __lock_set_timeout(dbenv,
txnp->txnid, 0, DB_SET_LOCK_TIMEOUT)) != 0)
return (__db_panic(dbenv, ret));
request.op = DB_LOCK_UPGRADE_WRITE;
request.obj = NULL;
if ((ret = __lock_vec(
dbenv, txnp->txnid, 0, &request, 1, NULL)) != 0)
return (__db_panic(dbenv, ret));
}
if ((ret = __txn_undo(txnp)) != 0)
return (__db_panic(dbenv, ret));
SET_LOG_FLAGS(dbenv, txnp, lflags);
if (DBENV_LOGGING(dbenv) && td->status == TXN_PREPARED &&
(ret = __txn_regop_log(dbenv, txnp, &txnp->last_lsn,
lflags, TXN_ABORT, (int32_t)time(NULL), NULL)) != 0)
return (__db_panic(dbenv, ret));
return (__txn_end(txnp, 0));
}
static int
__txn_discard_pp(txnp, flags)
DB_TXN *txnp;
u_int32_t flags;
{
DB_ENV *dbenv;
int not_child, ret;
dbenv = txnp->mgrp->dbenv;
not_child = txnp->parent == NULL;
ret = __txn_discard(txnp, flags);
if (not_child && IS_ENV_REPLICATED(dbenv))
__op_rep_exit(dbenv);
return (ret);
}
int
__txn_discard(txnp, flags)
DB_TXN *txnp;
u_int32_t flags;
{
DB_ENV *dbenv;
DB_TXN *freep;
TXN_DETAIL *td;
int ret;
COMPQUIET(flags, 0);
dbenv = txnp->mgrp->dbenv;
freep = NULL;
PANIC_CHECK(dbenv);
if ((ret = __txn_isvalid(txnp, &td, TXN_OP_DISCARD)) != 0)
return (ret);
DB_ASSERT(TAILQ_FIRST(&txnp->kids) == NULL);
MUTEX_THREAD_LOCK(dbenv, txnp->mgrp->mutexp);
txnp->mgrp->n_discards++;
if (F_ISSET(txnp, TXN_MALLOC)) {
TAILQ_REMOVE(&txnp->mgrp->txn_chain, txnp, links);
freep = txnp;
}
MUTEX_THREAD_UNLOCK(dbenv, txnp->mgrp->mutexp);
if (freep != NULL)
__os_free(dbenv, freep);
return (0);
}
int
__txn_prepare(txnp, gid)
DB_TXN *txnp;
u_int8_t *gid;
{
DBT list_dbt, xid;
DB_ENV *dbenv;
DB_LOCKREQ request;
DB_TXN *kid;
TXN_DETAIL *td;
u_int32_t lflags;
int ret;
dbenv = txnp->mgrp->dbenv;
PANIC_CHECK(dbenv);
if ((ret = __txn_isvalid(txnp, &td, TXN_OP_PREPARE)) != 0)
return (ret);
while ((kid = TAILQ_FIRST(&txnp->kids)) != NULL)
if ((ret = __txn_commit(kid, DB_TXN_NOSYNC)) != 0)
return (ret);
if (txnp->txn_list != NULL &&
(ret = __db_do_the_limbo(dbenv,
NULL, txnp, txnp->txn_list, LIMBO_PREPARE)) != 0)
return (ret);
if ((ret = __txn_doevents(dbenv, txnp, TXN_PREPARE, 1)) != 0)
return (ret);
memset(&request, 0, sizeof(request));
if (LOCKING_ON(dbenv)) {
request.op = DB_LOCK_PUT_READ;
if (IS_REP_MASTER(dbenv) &&
IS_ZERO_LSN(txnp->last_lsn)) {
memset(&list_dbt, 0, sizeof(list_dbt));
request.obj = &list_dbt;
}
if ((ret = __lock_vec(dbenv,
txnp->txnid, 0, &request, 1, NULL)) != 0)
return (ret);
}
if (DBENV_LOGGING(dbenv)) {
memset(&xid, 0, sizeof(xid));
if (td->xa_status != TXN_XA_ENDED &&
td->xa_status != TXN_XA_SUSPENDED)
memcpy(td->xid, gid, sizeof(td->xid));
xid.size = sizeof(td->xid);
xid.data = td->xid;
lflags = DB_LOG_COMMIT | DB_LOG_PERM | DB_FLUSH;
if ((ret = __txn_xa_regop_log(dbenv, txnp, &txnp->last_lsn,
lflags, TXN_PREPARE, &xid, td->format, td->gtrid, td->bqual,
&td->begin_lsn, request.obj)) != 0) {
__db_err(dbenv, "DB_TXN->prepare: log_write failed %s",
db_strerror(ret));
}
if (request.obj != NULL && request.obj->data != NULL)
__os_free(dbenv, request.obj->data);
if (ret != 0)
return (ret);
}
MUTEX_THREAD_LOCK(dbenv, txnp->mgrp->mutexp);
td->status = TXN_PREPARED;
MUTEX_THREAD_UNLOCK(dbenv, txnp->mgrp->mutexp);
return (0);
}
u_int32_t
__txn_id(txnp)
DB_TXN *txnp;
{
return (txnp->txnid);
}
int
__txn_set_timeout(txnp, timeout, op)
DB_TXN *txnp;
db_timeout_t timeout;
u_int32_t op;
{
if (op != DB_SET_TXN_TIMEOUT && op != DB_SET_LOCK_TIMEOUT)
return (__db_ferr(txnp->mgrp->dbenv, "DB_TXN->set_timeout", 0));
return (__lock_set_timeout(
txnp->mgrp->dbenv, txnp->txnid, timeout, op));
}
static int
__txn_isvalid(txnp, tdp, op)
const DB_TXN *txnp;
TXN_DETAIL **tdp;
txnop_t op;
{
DB_TXNMGR *mgrp;
DB_TXNREGION *region;
TXN_DETAIL *tp;
mgrp = txnp->mgrp;
region = mgrp->reginfo.primary;
if (!F_ISSET(txnp, TXN_COMPENSATE) &&
F_ISSET(region, TXN_IN_RECOVERY)) {
__db_err(mgrp->dbenv,
"operation not permitted during recovery");
goto err;
}
if (txnp->cursors != 0) {
__db_err(mgrp->dbenv, "transaction has active cursors");
goto err;
}
tp = (TXN_DETAIL *)R_ADDR(&mgrp->reginfo, txnp->off);
if (tdp != NULL)
*tdp = tp;
switch (op) {
case TXN_OP_DISCARD:
if (txnp->txnid != tp->txnid)
return (0);
if (tp->status != TXN_PREPARED &&
!F_ISSET(tp, TXN_DTL_RESTORED)) {
__db_err(mgrp->dbenv, "not a restored transaction");
return (__db_panic(mgrp->dbenv, EINVAL));
}
return (0);
case TXN_OP_PREPARE:
if (txnp->parent != NULL) {
__db_err(mgrp->dbenv,
"Prepare disallowed on child transactions");
return (EINVAL);
}
break;
case TXN_OP_ABORT:
case TXN_OP_COMMIT:
default:
break;
}
switch (tp->status) {
case TXN_PREPARED:
if (op == TXN_OP_PREPARE) {
__db_err(mgrp->dbenv, "transaction already prepared");
return (EINVAL);
}
break;
case TXN_RUNNING:
break;
case TXN_ABORTED:
case TXN_COMMITTED:
default:
__db_err(mgrp->dbenv, "transaction already %s",
tp->status == TXN_COMMITTED ? "committed" : "aborted");
goto err;
}
return (0);
err:
return (__db_panic(mgrp->dbenv, EINVAL));
}
static int
__txn_end(txnp, is_commit)
DB_TXN *txnp;
int is_commit;
{
DB_ENV *dbenv;
DB_LOCKREQ request;
DB_TXNLOGREC *lr;
DB_TXNMGR *mgr;
DB_TXNREGION *region;
TXN_DETAIL *tp;
int do_closefiles, ret;
mgr = txnp->mgrp;
dbenv = mgr->dbenv;
region = mgr->reginfo.primary;
do_closefiles = 0;
if ((ret = __txn_doevents(dbenv,
txnp, is_commit ? TXN_COMMIT : TXN_ABORT, 0)) != 0)
return (__db_panic(dbenv, ret));
if (LOCKING_ON(dbenv)) {
request.op = txnp->parent == NULL ||
is_commit == 0 ? DB_LOCK_PUT_ALL : DB_LOCK_INHERIT;
request.obj = NULL;
if ((ret = __lock_vec(dbenv,
txnp->txnid, 0, &request, 1, NULL)) != 0)
return (__db_panic(dbenv, ret));
}
R_LOCK(dbenv, &mgr->reginfo);
tp = (TXN_DETAIL *)R_ADDR(&mgr->reginfo, txnp->off);
SH_TAILQ_REMOVE(®ion->active_txn, tp, links, __txn_detail);
if (F_ISSET(tp, TXN_DTL_RESTORED)) {
region->stat.st_nrestores--;
do_closefiles = region->stat.st_nrestores == 0;
}
__db_shalloc_free(mgr->reginfo.addr, tp);
if (is_commit)
region->stat.st_ncommits++;
else
region->stat.st_naborts++;
--region->stat.st_nactive;
R_UNLOCK(dbenv, &mgr->reginfo);
if (LOCKING_ON(dbenv) && (ret =
__lock_freefamilylocker(dbenv->lk_handle, txnp->txnid)) != 0)
return (__db_panic(dbenv, ret));
if (txnp->parent != NULL)
TAILQ_REMOVE(&txnp->parent->kids, txnp, klinks);
while ((lr = STAILQ_FIRST(&txnp->logs)) != NULL) {
STAILQ_REMOVE(&txnp->logs, lr, __txn_logrec, links);
__os_free(dbenv, lr);
}
if (F_ISSET(txnp, TXN_MALLOC)) {
MUTEX_THREAD_LOCK(dbenv, mgr->mutexp);
TAILQ_REMOVE(&mgr->txn_chain, txnp, links);
MUTEX_THREAD_UNLOCK(dbenv, mgr->mutexp);
__os_free(dbenv, txnp);
}
if (do_closefiles) {
F_SET((DB_LOG *)dbenv->lg_handle, DBLOG_RECOVER);
(void)__dbreg_close_files(dbenv);
F_CLR((DB_LOG *)dbenv->lg_handle, DBLOG_RECOVER);
mgr->n_discards = 0;
(void)__txn_checkpoint(dbenv, 0, 0, DB_FORCE);
}
return (0);
}
static int
__txn_dispatch_undo(dbenv, txnp, rdbt, key_lsn, txnlist)
DB_ENV *dbenv;
DB_TXN *txnp;
DBT *rdbt;
DB_LSN *key_lsn;
void *txnlist;
{
int ret;
ret = __db_dispatch(dbenv, dbenv->recover_dtab,
dbenv->recover_dtab_size, rdbt, key_lsn, DB_TXN_ABORT, txnlist);
if (F_ISSET(txnp, TXN_CHILDCOMMIT))
(void)__db_txnlist_lsnadd(dbenv,
txnlist, key_lsn, 0);
if (ret == DB_SURPRISE_KID) {
if ((ret = __db_txnlist_lsninit(
dbenv, txnlist, key_lsn)) == 0)
F_SET(txnp, TXN_CHILDCOMMIT);
}
return (ret);
}
static int
__txn_undo(txnp)
DB_TXN *txnp;
{
DBT rdbt;
DB_ENV *dbenv;
DB_LOGC *logc;
DB_LSN key_lsn;
DB_TXN *ptxn;
DB_TXNLOGREC *lr;
DB_TXNMGR *mgr;
int ret, t_ret;
void *txnlist;
mgr = txnp->mgrp;
dbenv = mgr->dbenv;
logc = NULL;
txnlist = NULL;
if (!DBENV_LOGGING(dbenv))
return (0);
memset(&rdbt, 0, sizeof(rdbt));
for (ptxn = txnp->parent; ptxn != NULL && ptxn->parent != NULL;)
ptxn = ptxn->parent;
if (ptxn != NULL && ptxn->txn_list != NULL)
txnlist = ptxn->txn_list;
else if (txnp->txn_list != NULL)
txnlist = txnp->txn_list;
else if ((ret = __db_txnlist_init(dbenv, 0, 0, NULL, &txnlist)) != 0)
return (ret);
else if (ptxn != NULL)
ptxn->txn_list = txnlist;
if (F_ISSET(txnp, TXN_CHILDCOMMIT) &&
(ret = __db_txnlist_lsninit(dbenv, txnlist, &txnp->last_lsn)) != 0)
return (ret);
for (lr = STAILQ_FIRST(&txnp->logs);
lr != NULL; lr = STAILQ_NEXT(lr, links)) {
rdbt.data = lr->data;
rdbt.size = 0;
LSN_NOT_LOGGED(key_lsn);
ret =
__txn_dispatch_undo(dbenv, txnp, &rdbt, &key_lsn, txnlist);
if (ret != 0) {
__db_err(dbenv,
"DB_TXN->abort: In-memory log undo failed: %s",
db_strerror(ret));
goto err;
}
}
key_lsn = txnp->last_lsn;
if (!IS_ZERO_LSN(key_lsn) &&
(ret = __log_cursor(dbenv, &logc)) != 0)
goto err;
while (!IS_ZERO_LSN(key_lsn)) {
if ((ret = __log_c_get(logc, &key_lsn, &rdbt, DB_SET)) == 0) {
ret = __txn_dispatch_undo(dbenv,
txnp, &rdbt, &key_lsn, txnlist);
}
if (ret != 0) {
__db_err(dbenv,
"DB_TXN->abort: Log undo failed for LSN: %lu %lu: %s",
(u_long)key_lsn.file, (u_long)key_lsn.offset,
db_strerror(ret));
goto err;
}
}
ret = __db_do_the_limbo(dbenv, ptxn, txnp, txnlist, LIMBO_NORMAL);
err: if (logc != NULL && (t_ret = __log_c_close(logc)) != 0 && ret == 0)
ret = t_ret;
if (ptxn == NULL && txnlist != NULL)
__db_txnlist_end(dbenv, txnlist);
return (ret);
}
int
__txn_checkpoint_pp(dbenv, kbytes, minutes, flags)
DB_ENV *dbenv;
u_int32_t kbytes, minutes, flags;
{
int rep_check, ret;
PANIC_CHECK(dbenv);
ENV_REQUIRES_CONFIG(dbenv,
dbenv->tx_handle, "txn_checkpoint", DB_INIT_TXN);
if (IS_REP_CLIENT(dbenv))
return (0);
rep_check = IS_ENV_REPLICATED(dbenv) ? 1 : 0;
if (rep_check)
__env_rep_enter(dbenv);
ret = __txn_checkpoint(dbenv, kbytes, minutes, flags);
if (rep_check)
__env_rep_exit(dbenv);
return (ret);
}
int
__txn_checkpoint(dbenv, kbytes, minutes, flags)
DB_ENV *dbenv;
u_int32_t kbytes, minutes, flags;
{
DB_LSN ckp_lsn, last_ckp;
DB_TXNMGR *mgr;
DB_TXNREGION *region;
TXN_DETAIL *txnp;
time_t last_ckp_time, now;
u_int32_t bytes, gen, mbytes;
int ret;
ret = gen = 0;
if (IS_REP_CLIENT(dbenv)) {
if (MPOOL_ON(dbenv) && (ret = __memp_sync(dbenv, NULL)) != 0) {
__db_err(dbenv,
"txn_checkpoint: failed to flush the buffer cache %s",
db_strerror(ret));
return (ret);
} else
return (0);
}
mgr = dbenv->tx_handle;
region = mgr->reginfo.primary;
__log_txn_lsn(dbenv, &ckp_lsn, &mbytes, &bytes);
if (!LF_ISSET(DB_FORCE)) {
if (bytes == 0 && mbytes == 0)
return (0);
if (kbytes != 0 &&
mbytes * 1024 + bytes / 1024 >= (u_int32_t)kbytes)
goto do_ckp;
if (minutes != 0) {
(void)time(&now);
R_LOCK(dbenv, &mgr->reginfo);
last_ckp_time = region->time_ckp;
R_UNLOCK(dbenv, &mgr->reginfo);
if (now - last_ckp_time >= (time_t)(minutes * 60))
goto do_ckp;
}
if (minutes != 0 || kbytes != 0)
return (0);
}
do_ckp:
R_LOCK(dbenv, &mgr->reginfo);
for (txnp = SH_TAILQ_FIRST(®ion->active_txn, __txn_detail);
txnp != NULL;
txnp = SH_TAILQ_NEXT(txnp, links, __txn_detail))
if (!IS_ZERO_LSN(txnp->begin_lsn) &&
log_compare(&txnp->begin_lsn, &ckp_lsn) < 0)
ckp_lsn = txnp->begin_lsn;
R_UNLOCK(dbenv, &mgr->reginfo);
if (MPOOL_ON(dbenv) && (ret = __memp_sync(dbenv, NULL)) != 0) {
__db_err(dbenv,
"txn_checkpoint: failed to flush the buffer cache %s",
db_strerror(ret));
return (ret);
}
if (LOGGING_ON(dbenv)) {
R_LOCK(dbenv, &mgr->reginfo);
last_ckp = region->last_ckp;
R_UNLOCK(dbenv, &mgr->reginfo);
if (REP_ON(dbenv))
__rep_get_gen(dbenv, &gen);
if ((ret = __dbreg_open_files(dbenv)) != 0 ||
(ret = __txn_ckp_log(dbenv, NULL,
&ckp_lsn, DB_FLUSH | DB_LOG_PERM | DB_LOG_CHKPNT, &ckp_lsn,
&last_ckp, (int32_t)time(NULL), gen)) != 0) {
__db_err(dbenv,
"txn_checkpoint: log failed at LSN [%ld %ld] %s",
(long)ckp_lsn.file, (long)ckp_lsn.offset,
db_strerror(ret));
return (ret);
}
__txn_updateckp(dbenv, &ckp_lsn);
}
return (ret);
}
int
__txn_getckp(dbenv, lsnp)
DB_ENV *dbenv;
DB_LSN *lsnp;
{
DB_LSN lsn;
DB_TXNMGR *mgr;
DB_TXNREGION *region;
mgr = dbenv->tx_handle;
region = mgr->reginfo.primary;
R_LOCK(dbenv, &mgr->reginfo);
lsn = region->last_ckp;
R_UNLOCK(dbenv, &mgr->reginfo);
if (IS_ZERO_LSN(lsn))
return (DB_NOTFOUND);
*lsnp = lsn;
return (0);
}
int
__txn_activekids(dbenv, rectype, txnp)
DB_ENV *dbenv;
u_int32_t rectype;
DB_TXN *txnp;
{
if (F_ISSET(txnp, TXN_COMPENSATE) || rectype == DB___txn_child)
return (0);
if (TAILQ_FIRST(&txnp->kids) != NULL) {
__db_err(dbenv, "Child transaction is active");
return (EPERM);
}
return (0);
}
int
__txn_force_abort(dbenv, buffer)
DB_ENV *dbenv;
u_int8_t *buffer;
{
DB_CIPHER *db_cipher;
HDR *hdr;
u_int32_t hdrlen, offset, opcode, rec_len, sum_len;
u_int8_t *bp, *key, chksum[DB_MAC_KEY];
size_t hdrsize;
int ret;
db_cipher = dbenv->crypto_handle;
hdrsize = CRYPTO_ON(dbenv) ? HDR_CRYPTO_SZ : HDR_NORMAL_SZ;
hdr = (HDR *)buffer;
memcpy(&hdrlen, buffer + SSZ(HDR, len), sizeof(hdr->len));
rec_len = hdrlen - hdrsize;
offset = sizeof(u_int32_t) + sizeof(u_int32_t) + sizeof(DB_LSN);
if (CRYPTO_ON(dbenv)) {
key = db_cipher->mac_key;
sum_len = DB_MAC_KEY;
if ((ret = db_cipher->decrypt(dbenv, db_cipher->data,
&hdr->iv[0], buffer + hdrsize, rec_len)) != 0)
return (__db_panic(dbenv, ret));
} else {
key = NULL;
sum_len = sizeof(u_int32_t);
}
bp = buffer + hdrsize + offset;
opcode = TXN_ABORT;
memcpy(bp, &opcode, sizeof(opcode));
if (CRYPTO_ON(dbenv) &&
(ret = db_cipher->encrypt(dbenv,
db_cipher->data, &hdr->iv[0], buffer + hdrsize, rec_len)) != 0)
return (__db_panic(dbenv, ret));
__db_chksum(buffer + hdrsize, rec_len, key, chksum);
memcpy(buffer + SSZ(HDR, chksum), &chksum, sum_len);
return (0);
}
int
__txn_preclose(dbenv)
DB_ENV *dbenv;
{
DB_TXNMGR *mgr;
DB_TXNREGION *region;
int do_closefiles, ret;
mgr = (DB_TXNMGR *)dbenv->tx_handle;
region = mgr->reginfo.primary;
do_closefiles = 0;
R_LOCK(dbenv, &mgr->reginfo);
if (region != NULL &&
region->stat.st_nrestores
<= mgr->n_discards && mgr->n_discards != 0)
do_closefiles = 1;
R_UNLOCK(dbenv, &mgr->reginfo);
if (do_closefiles) {
F_SET((DB_LOG *)dbenv->lg_handle, DBLOG_RECOVER);
ret = __dbreg_close_files(dbenv);
F_CLR((DB_LOG *)dbenv->lg_handle, DBLOG_RECOVER);
} else
ret = 0;
return (ret);
}
int
__txn_reset(dbenv)
DB_ENV *dbenv;
{
DB_LSN scrap;
DB_TXNREGION *region;
region = ((DB_TXNMGR *)dbenv->tx_handle)->reginfo.primary;
region->last_txnid = TXN_MINIMUM;
DB_ASSERT(LOGGING_ON(dbenv));
return (__txn_recycle_log(dbenv,
NULL, &scrap, 0, TXN_MINIMUM, TXN_MAXIMUM));
}
void
__txn_updateckp(dbenv, lsnp)
DB_ENV *dbenv;
DB_LSN *lsnp;
{
DB_TXNMGR *mgr;
DB_TXNREGION *region;
mgr = dbenv->tx_handle;
region = mgr->reginfo.primary;
R_LOCK(dbenv, &mgr->reginfo);
if (log_compare(®ion->last_ckp, lsnp) < 0) {
region->last_ckp = *lsnp;
(void)time(®ion->time_ckp);
}
R_UNLOCK(dbenv, &mgr->reginfo);
}