1 /* Copyright (c) 2009, 2010 Nicira Networks.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #ifndef OVSDB_IDL_PROVIDER_H
17 #define OVSDB_IDL_PROVIDER_H 1
21 #include "ovsdb-idl.h"
22 #include "ovsdb-types.h"
26 struct ovsdb_idl_row {
27 struct hmap_node hmap_node; /* In struct ovsdb_idl_table's 'rows'. */
28 struct uuid uuid; /* Row "_uuid" field. */
29 struct list src_arcs; /* Forward arcs (ovsdb_idl_arc.src_node). */
30 struct list dst_arcs; /* Backward arcs (ovsdb_idl_arc.dst_node). */
31 struct ovsdb_idl_table *table; /* Containing table. */
32 struct ovsdb_datum *old; /* Committed data (null if orphaned). */
34 /* Transactional data. */
35 struct ovsdb_datum *new; /* Modified data (null to delete row). */
36 unsigned long int *prereqs; /* Bitmap of columns to verify in "old". */
37 unsigned long int *written; /* Bitmap of columns from "new" to write. */
38 struct hmap_node txn_node; /* Node in ovsdb_idl_txn's list. */
41 struct ovsdb_idl_column {
43 struct ovsdb_type type;
44 void (*parse)(struct ovsdb_idl_row *, const struct ovsdb_datum *);
45 void (*unparse)(struct ovsdb_idl_row *);
48 struct ovsdb_idl_table_class {
50 const struct ovsdb_idl_column *columns;
52 size_t allocation_size;
56 /* Client reads and may write this column and wants to be alerted upon
59 * This is the default. */
62 /* Client may read and write this column, but doesn't care to be alerted
65 * This is useful for columns that a client treats as "write-only", that
66 * is, it updates them but doesn't want to get alerted about its own
67 * updates. It also won't be alerted about other clients' updates, so this
68 * is suitable only for use by a client that "owns" a particular column. */
71 /* Client won't read or write this column at all. The IDL code can't
72 * prevent reading the column, but writing will cause assertion
77 struct ovsdb_idl_table {
78 const struct ovsdb_idl_table_class *class;
79 unsigned char *modes; /* One of OVSDB_MODE_*, indexed by column. */
80 struct shash columns; /* Contains "const struct ovsdb_idl_column *"s. */
81 struct hmap rows; /* Contains "struct ovsdb_idl_row"s. */
82 struct ovsdb_idl *idl; /* Containing idl. */
85 struct ovsdb_idl_class {
86 const char *database; /* <db-name> for this database. */
87 const struct ovsdb_idl_table_class *tables;
91 struct ovsdb_idl_row *ovsdb_idl_get_row_arc(
92 struct ovsdb_idl_row *src,
93 struct ovsdb_idl_table_class *dst_table,
94 const struct uuid *dst_uuid);
96 void ovsdb_idl_txn_verify(const struct ovsdb_idl_row *,
97 const struct ovsdb_idl_column *);
99 struct ovsdb_idl_txn *ovsdb_idl_txn_get(const struct ovsdb_idl_row *);
101 #endif /* ovsdb-idl-provider.h */