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https://github.com/openvswitch/ovs
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979821c0a6
The IDL is intended to allow clients easier access to data in the database by providing an extra layer of abstraction. However, ovs-vsctl needs to also provide generic access to database tables, rows, and columns, and until now the IDL has not allowed this. In particular, there was no way to modify the value of a database column by providing a "struct ovsdb_datum" with the new value and then have that reflected in the IDL structs, although the other direction was possible. This commit fixes that problem, which requires a bit of refactoring of the IDL layer. It also exposes the interface for iterating through table records to clients directly, by moving it from the "private" IDL header to the public one.
82 lines
2.8 KiB
C
82 lines
2.8 KiB
C
/* Copyright (c) 2009, 2010 Nicira Networks.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef OVSDB_IDL_PROVIDER_H
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#define OVSDB_IDL_PROVIDER_H 1
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#include "hmap.h"
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#include "list.h"
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#include "ovsdb-idl.h"
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#include "ovsdb-types.h"
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#include "shash.h"
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#include "uuid.h"
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struct ovsdb_idl_row {
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struct hmap_node hmap_node; /* In struct ovsdb_idl_table's 'rows'. */
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struct uuid uuid; /* Row "_uuid" field. */
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struct list src_arcs; /* Forward arcs (ovsdb_idl_arc.src_node). */
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struct list dst_arcs; /* Backward arcs (ovsdb_idl_arc.dst_node). */
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struct ovsdb_idl_table *table; /* Containing table. */
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struct ovsdb_datum *old; /* Committed data (null if orphaned). */
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/* Transactional data. */
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struct ovsdb_datum *new; /* Modified data (null to delete row). */
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unsigned long int *prereqs; /* Bitmap of columns to verify in "old". */
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unsigned long int *written; /* Bitmap of columns from "new" to write. */
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struct hmap_node txn_node; /* Node in ovsdb_idl_txn's list. */
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};
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struct ovsdb_idl_column {
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char *name;
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struct ovsdb_type type;
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void (*parse)(struct ovsdb_idl_row *, const struct ovsdb_datum *);
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void (*unparse)(struct ovsdb_idl_row *);
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};
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struct ovsdb_idl_table_class {
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char *name;
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const struct ovsdb_idl_column *columns;
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size_t n_columns;
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size_t allocation_size;
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};
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struct ovsdb_idl_table {
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const struct ovsdb_idl_table_class *class;
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struct shash columns; /* Contains "const struct ovsdb_idl_column *"s. */
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struct hmap rows; /* Contains "struct ovsdb_idl_row"s. */
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struct ovsdb_idl *idl; /* Containing idl. */
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};
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struct ovsdb_idl_class {
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const struct ovsdb_idl_table_class *tables;
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size_t n_tables;
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};
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struct ovsdb_idl_row *ovsdb_idl_get_row_arc(
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struct ovsdb_idl_row *src,
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struct ovsdb_idl_table_class *dst_table,
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const struct uuid *dst_uuid);
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void ovsdb_idl_txn_verify(const struct ovsdb_idl_row *,
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const struct ovsdb_idl_column *);
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void ovsdb_idl_txn_delete(struct ovsdb_idl_row *);
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struct ovsdb_idl_row *ovsdb_idl_txn_insert(
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struct ovsdb_idl_txn *,
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const struct ovsdb_idl_table_class *);
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struct ovsdb_idl_txn *ovsdb_idl_txn_get(const struct ovsdb_idl_row *);
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#endif /* ovsdb-idl-provider.h */
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