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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1999, 2012 Oracle and/or its affiliates. All rights reserved.
*
* $Id$
*/
#include "db_config.h"
#include "db_int.h"
#include "dbinc/db_page.h"
#include "dbinc/hash.h"
#include "dbinc/lock.h"
#include "dbinc/mp.h"
/*
* Acquire the meta-data page.
*
* PUBLIC: int __ham_get_meta __P((DBC *));
*/
int
__ham_get_meta(dbc)
DBC *dbc;
{
DB *dbp;
DB_MPOOLFILE *mpf;
HASH *hashp;
HASH_CURSOR *hcp;
u_int32_t revision;
int ret, t_ret;
dbp = dbc->dbp;
mpf = dbp->mpf;
hashp = dbp->h_internal;
hcp = (HASH_CURSOR *)dbc->internal;
again:
revision = hashp->revision;
if ((ret = __db_lget(dbc, 0,
hashp->meta_pgno, DB_LOCK_READ, 0, &hcp->hlock)) != 0)
return (ret);
if ((ret = __memp_fget(mpf, &hashp->meta_pgno,
dbc->thread_info, dbc->txn, DB_MPOOL_CREATE, &hcp->hdr)) != 0) {
(void)__LPUT(dbc, hcp->hlock);
return (ret);
}
if (F_ISSET(dbp, DB_AM_SUBDB) &&
(revision != dbp->mpf->mfp->revision ||
(TYPE(hcp->hdr) != P_HASHMETA &&
!IS_RECOVERING(dbp->env) && !F_ISSET(dbp, DB_AM_RECOVER)))) {
ret = __LPUT(dbc, hcp->hlock);
t_ret =
__memp_fput(mpf, dbc->thread_info, hcp->hdr, dbc->priority);
hcp->hdr = NULL;
if (ret != 0)
return (ret);
if (t_ret != 0)
return (t_ret);
if ((ret = __db_reopen(dbc)) != 0)
return (ret);
goto again;
}
return (ret);
}
/*
* Release the meta-data page.
*
* PUBLIC: int __ham_release_meta __P((DBC *));
*/
int
__ham_release_meta(dbc)
DBC *dbc;
{
DB_MPOOLFILE *mpf;
HASH_CURSOR *hcp;
int ret;
mpf = dbc->dbp->mpf;
hcp = (HASH_CURSOR *)dbc->internal;
if (hcp->hdr != NULL) {
if ((ret = __memp_fput(mpf,
dbc->thread_info, hcp->hdr, dbc->priority)) != 0)
return (ret);
hcp->hdr = NULL;
}
ret = __TLPUT(dbc, hcp->hlock);
hcp->hlock.mode = DB_LOCK_NG;
return (ret);
}
/*
* Mark the meta-data page dirty.
*
* PUBLIC: int __ham_dirty_meta __P((DBC *, u_int32_t));
*/
int
__ham_dirty_meta(dbc, flags)
DBC *dbc;
u_int32_t flags;
{
DB_MPOOLFILE *mpf;
HASH *hashp;
HASH_CURSOR *hcp;
int ret;
if (F_ISSET(dbc, DBC_OPD))
dbc = dbc->internal->pdbc;
hashp = dbc->dbp->h_internal;
hcp = (HASH_CURSOR *)dbc->internal;
if (hcp->hlock.mode == DB_LOCK_WRITE)
return (0);
mpf = dbc->dbp->mpf;
if ((ret = __db_lget(dbc, LCK_COUPLE, hashp->meta_pgno,
DB_LOCK_WRITE, DB_LOCK_NOWAIT, &hcp->hlock)) != 0) {
if (ret != DB_LOCK_NOTGRANTED && ret != DB_LOCK_DEADLOCK)
return (ret);
if ((ret = __memp_fput(mpf,
dbc->thread_info, hcp->hdr, dbc->priority)) != 0)
return (ret);
hcp->hdr = NULL;
if ((ret = __db_lget(dbc, LCK_COUPLE, hashp->meta_pgno,
DB_LOCK_WRITE, 0, &hcp->hlock)) != 0)
return (ret);
ret = __memp_fget(mpf, &hashp->meta_pgno,
dbc->thread_info, dbc->txn, DB_MPOOL_DIRTY, &hcp->hdr);
return (ret);
}
return (__memp_dirty(mpf,
&hcp->hdr, dbc->thread_info, dbc->txn, dbc->priority, flags));
}
/*
* Return the meta data page if it is saved in the cursor.
*
* PUBLIC: int __ham_return_meta __P((DBC *, u_int32_t, DBMETA **));
*/
int
__ham_return_meta(dbc, flags, metap)
DBC *dbc;
u_int32_t flags;
DBMETA **metap;
{
HASH_CURSOR *hcp;
int ret;
*metap = NULL;
if (F_ISSET(dbc, DBC_OPD))
dbc = dbc->internal->pdbc;
hcp = (HASH_CURSOR *)dbc->internal;
if (hcp->hdr == NULL || PGNO(hcp->hdr) != PGNO_BASE_MD)
return (0);
if (LF_ISSET(DB_MPOOL_DIRTY) &&
(ret = __ham_dirty_meta(dbc, flags)) != 0)
return (ret);
*metap = (DBMETA *)hcp->hdr;
return (0);
}
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