1 /* Copyright (c) 2009, 2010, 2011 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.
25 #include "ovsdb-error.h"
26 #include "ovsdb-parser.h"
27 #include "ovsdb-types.h"
31 add_column(struct ovsdb_table_schema *ts, struct ovsdb_column *column)
33 assert(!shash_find(&ts->columns, column->name));
34 column->index = shash_count(&ts->columns);
35 shash_add(&ts->columns, column->name, column);
38 struct ovsdb_table_schema *
39 ovsdb_table_schema_create(const char *name, bool mutable,
40 unsigned int max_rows, bool is_root)
42 struct ovsdb_column *uuid, *version;
43 struct ovsdb_table_schema *ts;
45 ts = xzalloc(sizeof *ts);
46 ts->name = xstrdup(name);
47 ts->mutable = mutable;
48 shash_init(&ts->columns);
49 ts->max_rows = max_rows;
50 ts->is_root = is_root;
52 uuid = ovsdb_column_create("_uuid", false, true, &ovsdb_type_uuid);
54 assert(uuid->index == OVSDB_COL_UUID);
56 version = ovsdb_column_create("_version", false, false, &ovsdb_type_uuid);
57 add_column(ts, version);
58 assert(version->index == OVSDB_COL_VERSION);
63 struct ovsdb_table_schema *
64 ovsdb_table_schema_clone(const struct ovsdb_table_schema *old)
66 struct ovsdb_table_schema *new;
67 struct shash_node *node;
69 new = ovsdb_table_schema_create(old->name, old->mutable,
70 old->max_rows, old->is_root);
71 SHASH_FOR_EACH (node, &old->columns) {
72 const struct ovsdb_column *column = node->data;
74 if (column->name[0] == '_') {
75 /* Added automatically by ovsdb_table_schema_create(). */
79 add_column(new, ovsdb_column_clone(column));
85 ovsdb_table_schema_destroy(struct ovsdb_table_schema *ts)
87 struct shash_node *node;
89 SHASH_FOR_EACH (node, &ts->columns) {
90 ovsdb_column_destroy(node->data);
92 shash_destroy(&ts->columns);
98 ovsdb_table_schema_from_json(const struct json *json, const char *name,
99 struct ovsdb_table_schema **tsp)
101 struct ovsdb_table_schema *ts;
102 const struct json *columns, *mutable, *max_rows, *is_root;
103 struct shash_node *node;
104 struct ovsdb_parser parser;
105 struct ovsdb_error *error;
106 long long int n_max_rows;
110 ovsdb_parser_init(&parser, json, "table schema for table %s", name);
111 columns = ovsdb_parser_member(&parser, "columns", OP_OBJECT);
112 mutable = ovsdb_parser_member(&parser, "mutable",
113 OP_TRUE | OP_FALSE | OP_OPTIONAL);
114 max_rows = ovsdb_parser_member(&parser, "maxRows",
115 OP_INTEGER | OP_OPTIONAL);
116 is_root = ovsdb_parser_member(&parser, "isRoot", OP_BOOLEAN | OP_OPTIONAL);
117 error = ovsdb_parser_finish(&parser);
123 if (json_integer(max_rows) <= 0) {
124 return ovsdb_syntax_error(json, NULL,
125 "maxRows must be at least 1");
127 n_max_rows = max_rows->u.integer;
129 n_max_rows = UINT_MAX;
132 if (shash_is_empty(json_object(columns))) {
133 return ovsdb_syntax_error(json, NULL,
134 "table must have at least one column");
137 ts = ovsdb_table_schema_create(name,
138 mutable ? json_boolean(mutable) : true,
139 MIN(n_max_rows, UINT_MAX),
140 is_root ? json_boolean(is_root) : false);
141 SHASH_FOR_EACH (node, json_object(columns)) {
142 struct ovsdb_column *column;
144 if (node->name[0] == '_') {
145 error = ovsdb_syntax_error(json, NULL, "names beginning with "
146 "\"_\" are reserved");
147 } else if (!ovsdb_parser_is_id(node->name)) {
148 error = ovsdb_syntax_error(json, NULL, "name must be a valid id");
150 error = ovsdb_column_from_json(node->data, node->name, &column);
153 ovsdb_table_schema_destroy(ts);
157 add_column(ts, column);
163 /* Returns table schema 'ts' serialized into JSON.
165 * The "isRoot" member is included in the JSON only if its value would differ
166 * from 'default_is_root'. Ordinarily 'default_is_root' should be false,
167 * because ordinarily a table would be not be part of the root set if its
168 * "isRoot" member is omitted. However, garbage collection was not orginally
169 * included in OVSDB, so in older schemas that do not include any "isRoot"
170 * members, every table is implicitly part of the root set. To serialize such
171 * a schema in a way that can be read by older OVSDB tools, specify
172 * 'default_is_root' as true. */
174 ovsdb_table_schema_to_json(const struct ovsdb_table_schema *ts,
175 bool default_is_root)
177 struct json *json, *columns;
178 struct shash_node *node;
180 json = json_object_create();
182 json_object_put(json, "mutable", json_boolean_create(false));
184 if (default_is_root != ts->is_root) {
185 json_object_put(json, "isRoot", json_boolean_create(ts->is_root));
188 columns = json_object_create();
190 SHASH_FOR_EACH (node, &ts->columns) {
191 const struct ovsdb_column *column = node->data;
192 if (node->name[0] != '_') {
193 json_object_put(columns, column->name,
194 ovsdb_column_to_json(column));
197 json_object_put(json, "columns", columns);
198 if (ts->max_rows != UINT_MAX) {
199 json_object_put(json, "maxRows", json_integer_create(ts->max_rows));
205 const struct ovsdb_column *
206 ovsdb_table_schema_get_column(const struct ovsdb_table_schema *ts,
209 return shash_find_data(&ts->columns, name);
213 ovsdb_table_create(struct ovsdb_table_schema *ts)
215 struct ovsdb_table *table;
217 table = xmalloc(sizeof *table);
219 table->txn_table = NULL;
220 hmap_init(&table->rows);
226 ovsdb_table_destroy(struct ovsdb_table *table)
229 struct ovsdb_row *row, *next;
231 HMAP_FOR_EACH_SAFE (row, next, hmap_node, &table->rows) {
232 ovsdb_row_destroy(row);
234 hmap_destroy(&table->rows);
236 ovsdb_table_schema_destroy(table->schema);
241 const struct ovsdb_row *
242 ovsdb_table_get_row(const struct ovsdb_table *table, const struct uuid *uuid)
244 struct ovsdb_row *row;
246 HMAP_FOR_EACH_WITH_HASH (row, hmap_node, uuid_hash(uuid), &table->rows) {
247 if (uuid_equals(ovsdb_row_get_uuid(row), uuid)) {
255 /* This is probably not the function you want. Use ovsdb_txn_row_modify()
258 ovsdb_table_put_row(struct ovsdb_table *table, struct ovsdb_row *row)
260 const struct uuid *uuid = ovsdb_row_get_uuid(row);
261 if (!ovsdb_table_get_row(table, uuid)) {
262 hmap_insert(&table->rows, &row->hmap_node, uuid_hash(uuid));