bt_rec.c

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		/* Need to undo update described. */
		if ((ret = __bam_adjindx(dbc,
		    pagep, argp->indx, argp->indx_copy, !argp->is_insert)) != 0)
			goto out;

		LSN(pagep) = argp->lsn;
		modified = 1;
	}
	if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
		goto out;
	pagep = NULL;

done:	*lsnp = argp->prev_lsn;
	ret = 0;

out:	if (pagep != NULL)
		(void)mpf->put(mpf, pagep, 0);
	REC_CLOSE;
}

/*
 * __bam_cadjust_recover --
 *	Recovery function for the adjust of a count change in an internal
 *	page.
 *
 * PUBLIC: int __bam_cadjust_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_cadjust_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_cadjust_args *argp;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	PAGE *pagep;
	int cmp_n, cmp_p, modified, ret;

	pagep = NULL;
	COMPQUIET(info, NULL);
	REC_PRINT(__bam_cadjust_print);
	REC_INTRO(__bam_cadjust_read, 1);

	/* Get the page; if it never existed and we're undoing, we're done. */
	if ((ret = mpf->get(mpf, &argp->pgno, 0, &pagep)) != 0) {
		if (DB_UNDO(op))
			goto done;
		__db_pgerr(file_dbp, argp->pgno, ret);
		goto out;
	}

	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &argp->lsn);
	CHECK_LSN(op, cmp_p, &LSN(pagep), &argp->lsn);
	if (cmp_p == 0 && DB_REDO(op)) {
		/* Need to redo update described. */
		if (IS_BTREE_PAGE(pagep)) {
			GET_BINTERNAL(file_dbp, pagep, argp->indx)->nrecs +=
			    argp->adjust;
			if (argp->opflags & CAD_UPDATEROOT)
				RE_NREC_ADJ(pagep, argp->adjust);
		} else {
			GET_RINTERNAL(file_dbp, pagep, argp->indx)->nrecs +=
			    argp->adjust;
			if (argp->opflags & CAD_UPDATEROOT)
				RE_NREC_ADJ(pagep, argp->adjust);
		}

		LSN(pagep) = *lsnp;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/* Need to undo update described. */
		if (IS_BTREE_PAGE(pagep)) {
			GET_BINTERNAL(file_dbp, pagep, argp->indx)->nrecs -=
			    argp->adjust;
			if (argp->opflags & CAD_UPDATEROOT)
				RE_NREC_ADJ(pagep, -(argp->adjust));
		} else {
			GET_RINTERNAL(file_dbp, pagep, argp->indx)->nrecs -=
			    argp->adjust;
			if (argp->opflags & CAD_UPDATEROOT)
				RE_NREC_ADJ(pagep, -(argp->adjust));
		}
		LSN(pagep) = argp->lsn;
		modified = 1;
	}
	if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
		goto out;
	pagep = NULL;

done:	*lsnp = argp->prev_lsn;
	ret = 0;

out:	if (pagep != NULL)
		(void)mpf->put(mpf, pagep, 0);
	REC_CLOSE;
}

/*
 * __bam_cdel_recover --
 *	Recovery function for the intent-to-delete of a cursor record.
 *
 * PUBLIC: int __bam_cdel_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_cdel_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_cdel_args *argp;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	PAGE *pagep;
	u_int32_t indx;
	int cmp_n, cmp_p, modified, ret;

	pagep = NULL;
	COMPQUIET(info, NULL);
	REC_PRINT(__bam_cdel_print);
	REC_INTRO(__bam_cdel_read, 1);

	/* Get the page; if it never existed and we're undoing, we're done. */
	if ((ret = mpf->get(mpf, &argp->pgno, 0, &pagep)) != 0) {
		if (DB_UNDO(op))
			goto done;
		__db_pgerr(file_dbp, argp->pgno, ret);
		goto out;
	}

	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &argp->lsn);
	CHECK_LSN(op, cmp_p, &LSN(pagep), &argp->lsn);
	if (cmp_p == 0 && DB_REDO(op)) {
		/* Need to redo update described. */
		indx = argp->indx + (TYPE(pagep) == P_LBTREE ? O_INDX : 0);
		B_DSET(GET_BKEYDATA(file_dbp, pagep, indx)->type);

		LSN(pagep) = *lsnp;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/* Need to undo update described. */
		indx = argp->indx + (TYPE(pagep) == P_LBTREE ? O_INDX : 0);
		B_DCLR(GET_BKEYDATA(file_dbp, pagep, indx)->type);

		(void)__bam_ca_delete(file_dbp, argp->pgno, argp->indx, 0);

		LSN(pagep) = argp->lsn;
		modified = 1;
	}
	if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
		goto out;
	pagep = NULL;

done:	*lsnp = argp->prev_lsn;
	ret = 0;

out:	if (pagep != NULL)
		(void)mpf->put(mpf, pagep, 0);
	REC_CLOSE;
}

/*
 * __bam_repl_recover --
 *	Recovery function for page item replacement.
 *
 * PUBLIC: int __bam_repl_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_repl_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_repl_args *argp;
	BKEYDATA *bk;
	DB *file_dbp;
	DBC *dbc;
	DBT dbt;
	DB_MPOOLFILE *mpf;
	PAGE *pagep;
	int cmp_n, cmp_p, modified, ret;
	u_int8_t *p;

	pagep = NULL;
	COMPQUIET(info, NULL);
	REC_PRINT(__bam_repl_print);
	REC_INTRO(__bam_repl_read, 1);

	/* Get the page; if it never existed and we're undoing, we're done. */
	if ((ret = mpf->get(mpf, &argp->pgno, 0, &pagep)) != 0) {
		if (DB_UNDO(op))
			goto done;
		__db_pgerr(file_dbp, argp->pgno, ret);
		goto out;
	}
	bk = GET_BKEYDATA(file_dbp, pagep, argp->indx);

	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &argp->lsn);
	CHECK_LSN(op, cmp_p, &LSN(pagep), &argp->lsn);
	if (cmp_p == 0 && DB_REDO(op)) {
		/*
		 * Need to redo update described.
		 *
		 * Re-build the replacement item.
		 */
		memset(&dbt, 0, sizeof(dbt));
		dbt.size = argp->prefix + argp->suffix + argp->repl.size;
		if ((ret = __os_malloc(dbenv, dbt.size, &dbt.data)) != 0)
			goto out;
		p = dbt.data;
		memcpy(p, bk->data, argp->prefix);
		p += argp->prefix;
		memcpy(p, argp->repl.data, argp->repl.size);
		p += argp->repl.size;
		memcpy(p, bk->data + (bk->len - argp->suffix), argp->suffix);

		ret = __bam_ritem(dbc, pagep, argp->indx, &dbt);
		__os_free(dbenv, dbt.data);
		if (ret != 0)
			goto out;

		LSN(pagep) = *lsnp;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/*
		 * Need to undo update described.
		 *
		 * Re-build the original item.
		 */
		memset(&dbt, 0, sizeof(dbt));
		dbt.size = argp->prefix + argp->suffix + argp->orig.size;
		if ((ret = __os_malloc(dbenv, dbt.size, &dbt.data)) != 0)
			goto out;
		p = dbt.data;
		memcpy(p, bk->data, argp->prefix);
		p += argp->prefix;
		memcpy(p, argp->orig.data, argp->orig.size);
		p += argp->orig.size;
		memcpy(p, bk->data + (bk->len - argp->suffix), argp->suffix);

		ret = __bam_ritem(dbc, pagep, argp->indx, &dbt);
		__os_free(dbenv, dbt.data);
		if (ret != 0)
			goto out;

		/* Reset the deleted flag, if necessary. */
		if (argp->isdeleted)
			B_DSET(GET_BKEYDATA(file_dbp, pagep, argp->indx)->type);

		LSN(pagep) = argp->lsn;
		modified = 1;
	}
	if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
		goto out;
	pagep = NULL;

done:	*lsnp = argp->prev_lsn;
	ret = 0;

out:	if (pagep != NULL)
		(void)mpf->put(mpf, pagep, 0);
	REC_CLOSE;
}

/*
 * __bam_root_recover --
 *	Recovery function for setting the root page on the meta-data page.
 *
 * PUBLIC: int __bam_root_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_root_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_root_args *argp;
	BTMETA *meta;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	int cmp_n, cmp_p, modified, ret;

	meta = NULL;
	COMPQUIET(info, NULL);
	REC_PRINT(__bam_root_print);
	REC_INTRO(__bam_root_read, 0);

	if ((ret = mpf->get(mpf, &argp->meta_pgno, 0, &meta)) != 0) {
		/* The metadata page must always exist on redo. */
		if (DB_REDO(op)) {
			__db_pgerr(file_dbp, argp->meta_pgno, ret);
			goto out;
		} else
			goto done;
	}

	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(meta));
	cmp_p = log_compare(&LSN(meta), &argp->meta_lsn);
	CHECK_LSN(op, cmp_p, &LSN(meta), &argp->meta_lsn);
	if (cmp_p == 0 && DB_REDO(op)) {
		/* Need to redo update described. */
		meta->root = argp->root_pgno;
		meta->dbmeta.lsn = *lsnp;
		((BTREE *)file_dbp->bt_internal)->bt_root = meta->root;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/* Nothing to undo except lsn. */
		meta->dbmeta.lsn = argp->meta_lsn;
		modified = 1;
	}
	if ((ret = mpf->put(mpf, meta, modified ? DB_MPOOL_DIRTY : 0)) != 0)
		goto out;
	meta = NULL;

done:	*lsnp = argp->prev_lsn;
	ret = 0;

out:	if (meta != NULL)
		(void)mpf->put(mpf, meta, 0);
	REC_CLOSE;
}

/*
 * __bam_curadj_recover --
 *	Transaction abort function to undo cursor adjustments.
 *	This should only be triggered by subtransaction aborts.
 *
 * PUBLIC: int __bam_curadj_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_curadj_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_curadj_args *argp;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	int ret;

	COMPQUIET(info, NULL);

	REC_PRINT(__bam_curadj_print);
	REC_INTRO(__bam_curadj_read, 0);

	ret = 0;
	if (op != DB_TXN_ABORT)
		goto done;

	switch(argp->mode) {
	case DB_CA_DI:
		if ((ret = __bam_ca_di(dbc, argp->from_pgno,
		    argp->from_indx, -(int)argp->first_indx)) != 0)
			goto out;
		break;
	case DB_CA_DUP:
		if ((ret = __bam_ca_undodup(file_dbp, argp->first_indx,
		    argp->from_pgno, argp->from_indx, argp->to_indx)) != 0)
			goto out;
		break;

	case DB_CA_RSPLIT:
		if ((ret =
		    __bam_ca_rsplit(dbc, argp->to_pgno, argp->from_pgno)) != 0)
			goto out;
		break;

	case DB_CA_SPLIT:
		__bam_ca_undosplit(file_dbp, argp->from_pgno,
		    argp->to_pgno, argp->left_pgno, argp->from_indx);
		break;
	}

done:	*lsnp = argp->prev_lsn;
out:	REC_CLOSE;
}

/*
 * __bam_rcuradj_recover --
 *	Transaction abort function to undo cursor adjustments in rrecno.
 *	This should only be triggered by subtransaction aborts.
 *
 * PUBLIC: int __bam_rcuradj_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_rcuradj_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_rcuradj_args *argp;
	BTREE_CURSOR *cp;
	DB *file_dbp;
	DBC *dbc, *rdbc;
	DB_MPOOLFILE *mpf;
	int ret, t_ret;

	COMPQUIET(info, NULL);
	rdbc = NULL;

	REC_PRINT(__bam_rcuradj_print);
	REC_INTRO(__bam_rcuradj_read, 0);

	ret = t_ret = 0;

	if (op != DB_TXN_ABORT)
		goto done;

	/*
	 * We don't know whether we're in an offpage dup set, and
	 * thus don't know whether the dbc REC_INTRO has handed us is
	 * of a reasonable type.  It's certainly unset, so if this is
	 * an offpage dup set, we don't have an OPD cursor.  The
	 * simplest solution is just to allocate a whole new cursor
	 * for our use;  we're only really using it to hold pass some
	 * state into __ram_ca, and this way we don't need to make
	 * this function know anything about how offpage dups work.
	 */
	if ((ret =
	    __db_icursor(file_dbp,
		NULL, DB_RECNO, argp->root, 0, DB_LOCK_INVALIDID, &rdbc)) != 0)
		goto out;

	cp = (BTREE_CURSOR *)rdbc->internal;
	F_SET(cp, C_RENUMBER);
	cp->recno = argp->recno;

	switch(argp->mode) {
	case CA_DELETE:
		/*
		 * The way to undo a delete is with an insert.  Since
		 * we're undoing it, the delete flag must be set.
		 */
		F_SET(cp, C_DELETED);
		F_SET(cp, C_RENUMBER);	/* Just in case. */
		cp->order = argp->order;
		__ram_ca(rdbc, CA_ICURRENT);
		break;
	case CA_IAFTER:
	case CA_IBEFORE:
	case CA_ICURRENT:
		/*
		 * The way to undo an insert is with a delete.  The delete
		 * flag is unset to start with.
		 */
		F_CLR(cp, C_DELETED);
		cp->order = INVALID_ORDER;
		__ram_ca(rdbc, CA_DELETE);
		break;
	}

done:	*lsnp = argp->prev_lsn;
out:	if (rdbc != NULL && (t_ret = rdbc->c_close(rdbc)) != 0 && ret == 0)
		ret = t_ret;
	REC_CLOSE;
}