+\f
+/* Transactions. */
+
+static void ovsdb_idl_txn_complete(struct ovsdb_idl_txn *txn,
+ enum ovsdb_idl_txn_status);
+
+const char *
+ovsdb_idl_txn_status_to_string(enum ovsdb_idl_txn_status status)
+{
+ switch (status) {
+ case TXN_UNCHANGED:
+ return "unchanged";
+ case TXN_INCOMPLETE:
+ return "incomplete";
+ case TXN_ABORTED:
+ return "aborted";
+ case TXN_SUCCESS:
+ return "success";
+ case TXN_TRY_AGAIN:
+ return "try again";
+ case TXN_ERROR:
+ return "error";
+ }
+ return "<unknown>";
+}
+
+struct ovsdb_idl_txn *
+ovsdb_idl_txn_create(struct ovsdb_idl *idl)
+{
+ struct ovsdb_idl_txn *txn;
+
+ assert(!idl->txn);
+ idl->txn = txn = xmalloc(sizeof *txn);
+ txn->request_id = NULL;
+ txn->idl = idl;
+ hmap_init(&txn->txn_rows);
+ txn->status = TXN_INCOMPLETE;
+ txn->error = NULL;
+ txn->dry_run = false;
+ ds_init(&txn->comment);
+
+ txn->inc_table = NULL;
+ txn->inc_column = NULL;
+ txn->inc_where = NULL;
+
+ hmap_init(&txn->inserted_rows);
+
+ return txn;
+}
+
+/* Appends 's', which is treated as a printf()-type format string, to the
+ * comments that will be passed to the OVSDB server when 'txn' is committed.
+ * (The comment will be committed to the OVSDB log, which "ovsdb-tool
+ * show-log" can print in a relatively human-readable form.) */
+void
+ovsdb_idl_txn_add_comment(struct ovsdb_idl_txn *txn, const char *s, ...)
+{
+ va_list args;
+
+ if (txn->comment.length) {
+ ds_put_char(&txn->comment, '\n');
+ }
+
+ va_start(args, s);
+ ds_put_format_valist(&txn->comment, s, args);
+ va_end(args);
+}
+
+void
+ovsdb_idl_txn_set_dry_run(struct ovsdb_idl_txn *txn)
+{
+ txn->dry_run = true;
+}
+
+void
+ovsdb_idl_txn_increment(struct ovsdb_idl_txn *txn, const char *table,
+ const char *column, const struct json *where)
+{
+ assert(!txn->inc_table);
+ txn->inc_table = xstrdup(table);
+ txn->inc_column = xstrdup(column);
+ txn->inc_where = where ? json_clone(where) : json_array_create_empty();
+}
+
+void
+ovsdb_idl_txn_destroy(struct ovsdb_idl_txn *txn)
+{
+ struct ovsdb_idl_txn_insert *insert, *next;
+
+ json_destroy(txn->request_id);
+ if (txn->status == TXN_INCOMPLETE) {
+ hmap_remove(&txn->idl->outstanding_txns, &txn->hmap_node);
+ }
+ ovsdb_idl_txn_abort(txn);
+ ds_destroy(&txn->comment);
+ free(txn->error);
+ free(txn->inc_table);
+ free(txn->inc_column);
+ json_destroy(txn->inc_where);
+ HMAP_FOR_EACH_SAFE (insert, next, struct ovsdb_idl_txn_insert, hmap_node,
+ &txn->inserted_rows) {
+ free(insert);
+ }
+ hmap_destroy(&txn->inserted_rows);
+ free(txn);
+}
+
+void
+ovsdb_idl_txn_wait(const struct ovsdb_idl_txn *txn)
+{
+ if (txn->status != TXN_INCOMPLETE) {
+ poll_immediate_wake();
+ }
+}
+
+static struct json *
+where_uuid_equals(const struct uuid *uuid)
+{
+ return
+ json_array_create_1(
+ json_array_create_3(
+ json_string_create("_uuid"),
+ json_string_create("=="),
+ json_array_create_2(
+ json_string_create("uuid"),
+ json_string_create_nocopy(
+ xasprintf(UUID_FMT, UUID_ARGS(uuid))))));
+}
+
+static char *
+uuid_name_from_uuid(const struct uuid *uuid)
+{
+ char *name;
+ char *p;
+
+ name = xasprintf("row"UUID_FMT, UUID_ARGS(uuid));
+ for (p = name; *p != '\0'; p++) {
+ if (*p == '-') {
+ *p = '_';
+ }
+ }
+
+ return name;
+}
+
+static const struct ovsdb_idl_row *
+ovsdb_idl_txn_get_row(const struct ovsdb_idl_txn *txn, const struct uuid *uuid)
+{
+ const struct ovsdb_idl_row *row;
+
+ HMAP_FOR_EACH_WITH_HASH (row, struct ovsdb_idl_row, txn_node,
+ uuid_hash(uuid), &txn->txn_rows) {
+ if (uuid_equals(&row->uuid, uuid)) {
+ return row;
+ }
+ }
+ return NULL;
+}
+
+/* XXX there must be a cleaner way to do this */
+static struct json *
+substitute_uuids(struct json *json, const struct ovsdb_idl_txn *txn)
+{
+ if (json->type == JSON_ARRAY) {
+ struct uuid uuid;
+ size_t i;
+
+ if (json->u.array.n == 2
+ && json->u.array.elems[0]->type == JSON_STRING
+ && json->u.array.elems[1]->type == JSON_STRING
+ && !strcmp(json->u.array.elems[0]->u.string, "uuid")
+ && uuid_from_string(&uuid, json->u.array.elems[1]->u.string)) {
+ const struct ovsdb_idl_row *row;
+
+ row = ovsdb_idl_txn_get_row(txn, &uuid);
+ if (row && !row->old && row->new) {
+ json_destroy(json);
+
+ return json_array_create_2(
+ json_string_create("named-uuid"),
+ json_string_create_nocopy(uuid_name_from_uuid(&uuid)));
+ }
+ }
+
+ for (i = 0; i < json->u.array.n; i++) {
+ json->u.array.elems[i] = substitute_uuids(json->u.array.elems[i],
+ txn);
+ }
+ } else if (json->type == JSON_OBJECT) {
+ struct shash_node *node;
+
+ SHASH_FOR_EACH (node, json_object(json)) {
+ node->data = substitute_uuids(node->data, txn);
+ }
+ }
+ return json;
+}
+
+static void
+ovsdb_idl_txn_disassemble(struct ovsdb_idl_txn *txn)
+{
+ struct ovsdb_idl_row *row, *next;
+
+ /* This must happen early. Otherwise, ovsdb_idl_row_parse() will call an
+ * ovsdb_idl_column's 'parse' function, which will call
+ * ovsdb_idl_get_row_arc(), which will seen that the IDL is in a
+ * transaction and fail to update the graph. */
+ txn->idl->txn = NULL;
+
+ HMAP_FOR_EACH_SAFE (row, next, struct ovsdb_idl_row, txn_node,
+ &txn->txn_rows) {
+ if (row->old) {
+ if (row->written) {
+ ovsdb_idl_row_unparse(row);
+ ovsdb_idl_row_clear_arcs(row, false);
+ ovsdb_idl_row_parse(row);
+ }
+ } else {
+ ovsdb_idl_row_unparse(row);
+ }
+ ovsdb_idl_row_clear_new(row);
+
+ free(row->prereqs);
+ row->prereqs = NULL;
+
+ free(row->written);
+ row->written = NULL;
+
+ hmap_remove(&txn->txn_rows, &row->txn_node);
+ hmap_node_nullify(&row->txn_node);
+ if (!row->old) {
+ hmap_remove(&row->table->rows, &row->hmap_node);
+ free(row);
+ }
+ }
+ hmap_destroy(&txn->txn_rows);
+ hmap_init(&txn->txn_rows);
+}
+
+enum ovsdb_idl_txn_status
+ovsdb_idl_txn_commit(struct ovsdb_idl_txn *txn)
+{
+ struct ovsdb_idl_row *row;
+ struct json *operations;
+ bool any_updates;
+
+ if (txn != txn->idl->txn) {
+ return txn->status;
+ }
+
+ operations = json_array_create_1(
+ json_string_create(txn->idl->class->database));
+
+ /* Add prerequisites and declarations of new rows. */
+ HMAP_FOR_EACH (row, struct ovsdb_idl_row, txn_node, &txn->txn_rows) {
+ /* XXX check that deleted rows exist even if no prereqs? */
+ if (row->prereqs) {
+ const struct ovsdb_idl_table_class *class = row->table->class;
+ size_t n_columns = class->n_columns;
+ struct json *op, *columns, *row_json;
+ size_t idx;
+
+ op = json_object_create();
+ json_array_add(operations, op);
+ json_object_put_string(op, "op", "wait");
+ json_object_put_string(op, "table", class->name);
+ json_object_put(op, "timeout", json_integer_create(0));
+ json_object_put(op, "where", where_uuid_equals(&row->uuid));
+ json_object_put_string(op, "until", "==");
+ columns = json_array_create_empty();
+ json_object_put(op, "columns", columns);
+ row_json = json_object_create();
+ json_object_put(op, "rows", json_array_create_1(row_json));
+
+ BITMAP_FOR_EACH_1 (idx, n_columns, row->prereqs) {
+ const struct ovsdb_idl_column *column = &class->columns[idx];
+ json_array_add(columns, json_string_create(column->name));
+ json_object_put(row_json, column->name,
+ ovsdb_datum_to_json(&row->old[idx],
+ &column->type));
+ }
+ }
+ }
+
+ /* Add updates. */
+ any_updates = false;
+ HMAP_FOR_EACH (row, struct ovsdb_idl_row, txn_node, &txn->txn_rows) {
+ const struct ovsdb_idl_table_class *class = row->table->class;
+
+ if (row->old == row->new) {
+ continue;
+ } else if (!row->new) {
+ struct json *op = json_object_create();
+ json_object_put_string(op, "op", "delete");
+ json_object_put_string(op, "table", class->name);
+ json_object_put(op, "where", where_uuid_equals(&row->uuid));
+ json_array_add(operations, op);
+ any_updates = true;
+ } else {
+ struct json *row_json;
+ struct json *op;
+ size_t idx;
+
+ op = json_object_create();
+ json_object_put_string(op, "op", row->old ? "update" : "insert");
+ json_object_put_string(op, "table", class->name);
+ if (row->old) {
+ json_object_put(op, "where", where_uuid_equals(&row->uuid));
+ } else {
+ struct ovsdb_idl_txn_insert *insert;
+
+ json_object_put(op, "uuid-name",
+ json_string_create_nocopy(
+ uuid_name_from_uuid(&row->uuid)));
+
+ insert = xmalloc(sizeof *insert);
+ insert->dummy = row->uuid;
+ insert->op_index = operations->u.array.n - 1;
+ uuid_zero(&insert->real);
+ hmap_insert(&txn->inserted_rows, &insert->hmap_node,
+ uuid_hash(&insert->dummy));
+ }
+ row_json = json_object_create();
+ json_object_put(op, "row", row_json);
+
+ BITMAP_FOR_EACH_1 (idx, class->n_columns, row->written) {
+ const struct ovsdb_idl_column *column = &class->columns[idx];
+
+ if (row->old
+ ? !ovsdb_datum_equals(&row->old[idx], &row->new[idx],
+ &column->type)
+ : !ovsdb_datum_is_default(&row->new[idx], &column->type)) {
+ json_object_put(row_json, column->name,
+ substitute_uuids(
+ ovsdb_datum_to_json(&row->new[idx],
+ &column->type),
+ txn));
+ }
+ }
+
+ if (!row->old || !shash_is_empty(json_object(row_json))) {
+ json_array_add(operations, op);
+ any_updates = true;
+ } else {
+ json_destroy(op);
+ }
+ }
+ }
+
+ /* Add increment. */
+ if (txn->inc_table && any_updates) {
+ struct json *op;
+
+ txn->inc_index = operations->u.array.n - 1;
+
+ op = json_object_create();
+ json_object_put_string(op, "op", "mutate");
+ json_object_put_string(op, "table", txn->inc_table);
+ json_object_put(op, "where",
+ substitute_uuids(json_clone(txn->inc_where), txn));
+ json_object_put(op, "mutations",
+ json_array_create_1(
+ json_array_create_3(
+ json_string_create(txn->inc_column),
+ json_string_create("+="),
+ json_integer_create(1))));
+ json_array_add(operations, op);
+
+ op = json_object_create();
+ json_object_put_string(op, "op", "select");
+ json_object_put_string(op, "table", txn->inc_table);
+ json_object_put(op, "where",
+ substitute_uuids(json_clone(txn->inc_where), txn));
+ json_object_put(op, "columns",
+ json_array_create_1(json_string_create(
+ txn->inc_column)));
+ json_array_add(operations, op);
+ }
+
+ if (txn->comment.length) {
+ struct json *op = json_object_create();
+ json_object_put_string(op, "op", "comment");
+ json_object_put_string(op, "comment", ds_cstr(&txn->comment));
+ json_array_add(operations, op);
+ }
+
+ if (txn->dry_run) {
+ struct json *op = json_object_create();
+ json_object_put_string(op, "op", "abort");
+ json_array_add(operations, op);
+ }
+
+ if (!any_updates) {
+ txn->status = TXN_UNCHANGED;
+ json_destroy(operations);
+ } else if (!jsonrpc_session_send(
+ txn->idl->session,
+ jsonrpc_create_request(
+ "transact", operations, &txn->request_id))) {
+ hmap_insert(&txn->idl->outstanding_txns, &txn->hmap_node,
+ json_hash(txn->request_id, 0));
+ } else {
+ txn->status = TXN_TRY_AGAIN;
+ }
+
+ ovsdb_idl_txn_disassemble(txn);
+ return txn->status;
+}
+
+/* Attempts to commit 'txn', blocking until the commit either succeeds or
+ * fails. Returns the final commit status, which may be any TXN_* value other
+ * than TXN_INCOMPLETE. */
+enum ovsdb_idl_txn_status
+ovsdb_idl_txn_commit_block(struct ovsdb_idl_txn *txn)
+{
+ enum ovsdb_idl_txn_status status;
+
+ fatal_signal_run();
+ while ((status = ovsdb_idl_txn_commit(txn)) == TXN_INCOMPLETE) {
+ ovsdb_idl_run(txn->idl);
+ ovsdb_idl_wait(txn->idl);
+ ovsdb_idl_txn_wait(txn);
+ poll_block();
+ }
+ return status;
+}
+
+int64_t
+ovsdb_idl_txn_get_increment_new_value(const struct ovsdb_idl_txn *txn)
+{
+ assert(txn->status == TXN_SUCCESS);
+ return txn->inc_new_value;
+}
+
+void
+ovsdb_idl_txn_abort(struct ovsdb_idl_txn *txn)
+{
+ ovsdb_idl_txn_disassemble(txn);
+ if (txn->status == TXN_INCOMPLETE) {
+ txn->status = TXN_ABORTED;
+ }
+}
+
+const char *
+ovsdb_idl_txn_get_error(const struct ovsdb_idl_txn *txn)
+{
+ if (txn->status != TXN_ERROR) {
+ return ovsdb_idl_txn_status_to_string(txn->status);
+ } else if (txn->error) {
+ return txn->error;
+ } else {
+ return "no error details available";
+ }
+}
+
+static void
+ovsdb_idl_txn_set_error_json(struct ovsdb_idl_txn *txn,
+ const struct json *json)
+{
+ if (txn->error == NULL) {
+ txn->error = json_to_string(json, JSSF_SORT);
+ }
+}
+
+/* For transaction 'txn' that completed successfully, finds and returns the
+ * permanent UUID that the database assigned to a newly inserted row, given the
+ * 'uuid' that ovsdb_idl_txn_insert() assigned locally to that row.
+ *
+ * Returns NULL if 'uuid' is not a UUID assigned by ovsdb_idl_txn_insert() or
+ * if it was assigned by that function and then deleted by
+ * ovsdb_idl_txn_delete() within the same transaction. (Rows that are inserted
+ * and then deleted within a single transaction are never sent to the database
+ * server, so it never assigns them a permanent UUID.) */
+const struct uuid *
+ovsdb_idl_txn_get_insert_uuid(const struct ovsdb_idl_txn *txn,
+ const struct uuid *uuid)
+{
+ const struct ovsdb_idl_txn_insert *insert;
+
+ assert(txn->status == TXN_SUCCESS || txn->status == TXN_UNCHANGED);
+ HMAP_FOR_EACH_IN_BUCKET (insert, struct ovsdb_idl_txn_insert, hmap_node,
+ uuid_hash(uuid), &txn->inserted_rows) {
+ if (uuid_equals(uuid, &insert->dummy)) {
+ return &insert->real;
+ }
+ }
+ return NULL;
+}
+
+static void
+ovsdb_idl_txn_complete(struct ovsdb_idl_txn *txn,
+ enum ovsdb_idl_txn_status status)
+{
+ txn->status = status;
+ hmap_remove(&txn->idl->outstanding_txns, &txn->hmap_node);
+}
+
+void
+ovsdb_idl_txn_read(const struct ovsdb_idl_row *row,
+ const struct ovsdb_idl_column *column,
+ struct ovsdb_datum *datum)
+{
+ const struct ovsdb_idl_table_class *class = row->table->class;
+ size_t column_idx = column - class->columns;
+
+ assert(row->new != NULL);
+ if (row->written && bitmap_is_set(row->written, column_idx)) {
+ ovsdb_datum_clone(datum, &row->new[column_idx], &column->type);
+ } else if (row->old) {
+ ovsdb_datum_clone(datum, &row->old[column_idx], &column->type);
+ } else {
+ ovsdb_datum_init_default(datum, &column->type);
+ }
+}
+
+void
+ovsdb_idl_txn_write(const struct ovsdb_idl_row *row_,
+ const struct ovsdb_idl_column *column,
+ struct ovsdb_datum *datum)
+{
+ struct ovsdb_idl_row *row = (struct ovsdb_idl_row *) row_;
+ const struct ovsdb_idl_table_class *class = row->table->class;
+ size_t column_idx = column - class->columns;
+
+ assert(row->new != NULL);
+ assert(column_idx < class->n_columns);
+ if (hmap_node_is_null(&row->txn_node)) {
+ hmap_insert(&row->table->idl->txn->txn_rows, &row->txn_node,
+ uuid_hash(&row->uuid));
+ }
+ if (row->old == row->new) {
+ row->new = xmalloc(class->n_columns * sizeof *row->new);
+ }
+ if (!row->written) {
+ row->written = bitmap_allocate(class->n_columns);
+ }
+ if (bitmap_is_set(row->written, column_idx)) {
+ ovsdb_datum_destroy(&row->new[column_idx], &column->type);
+ } else {
+ bitmap_set1(row->written, column_idx);
+ }
+ row->new[column_idx] = *datum;
+ (column->unparse)(row);
+ (column->parse)(row, &row->new[column_idx]);
+}
+
+void
+ovsdb_idl_txn_verify(const struct ovsdb_idl_row *row_,
+ const struct ovsdb_idl_column *column)
+{
+ struct ovsdb_idl_row *row = (struct ovsdb_idl_row *) row_;
+ const struct ovsdb_idl_table_class *class = row->table->class;
+ size_t column_idx = column - class->columns;
+
+ assert(row->new != NULL);
+ if (!row->old
+ || (row->written && bitmap_is_set(row->written, column_idx))) {
+ return;
+ }
+
+ if (hmap_node_is_null(&row->txn_node)) {
+ hmap_insert(&row->table->idl->txn->txn_rows, &row->txn_node,
+ uuid_hash(&row->uuid));
+ }
+ if (!row->prereqs) {
+ row->prereqs = bitmap_allocate(class->n_columns);
+ }
+ bitmap_set1(row->prereqs, column_idx);
+}
+
+void
+ovsdb_idl_txn_delete(const struct ovsdb_idl_row *row_)
+{
+ struct ovsdb_idl_row *row = (struct ovsdb_idl_row *) row_;
+
+ assert(row->new != NULL);
+ if (!row->old) {
+ ovsdb_idl_row_unparse(row);
+ ovsdb_idl_row_clear_new(row);
+ assert(!row->prereqs);
+ hmap_remove(&row->table->rows, &row->hmap_node);
+ hmap_remove(&row->table->idl->txn->txn_rows, &row->txn_node);
+ free(row);
+ return;
+ }
+ if (hmap_node_is_null(&row->txn_node)) {
+ hmap_insert(&row->table->idl->txn->txn_rows, &row->txn_node,
+ uuid_hash(&row->uuid));
+ }
+ ovsdb_idl_row_clear_new(row);
+ row->new = NULL;
+}
+
+const struct ovsdb_idl_row *
+ovsdb_idl_txn_insert(struct ovsdb_idl_txn *txn,
+ const struct ovsdb_idl_table_class *class,
+ const struct uuid *uuid)
+{
+ struct ovsdb_idl_row *row = ovsdb_idl_row_create__(class);
+
+ if (uuid) {
+ assert(!ovsdb_idl_txn_get_row(txn, uuid));
+ row->uuid = *uuid;
+ } else {
+ uuid_generate(&row->uuid);
+ }
+
+ row->table = ovsdb_idl_table_from_class(txn->idl, class);
+ row->new = xmalloc(class->n_columns * sizeof *row->new);
+ row->written = bitmap_allocate(class->n_columns);
+ hmap_insert(&row->table->rows, &row->hmap_node, uuid_hash(&row->uuid));
+ hmap_insert(&txn->txn_rows, &row->txn_node, uuid_hash(&row->uuid));
+ return row;
+}
+
+static void
+ovsdb_idl_txn_abort_all(struct ovsdb_idl *idl)
+{
+ struct ovsdb_idl_txn *txn;
+
+ HMAP_FOR_EACH (txn, struct ovsdb_idl_txn, hmap_node,
+ &idl->outstanding_txns) {
+ ovsdb_idl_txn_complete(txn, TXN_TRY_AGAIN);
+ }
+}
+
+static struct ovsdb_idl_txn *
+ovsdb_idl_txn_find(struct ovsdb_idl *idl, const struct json *id)
+{
+ struct ovsdb_idl_txn *txn;
+
+ HMAP_FOR_EACH_WITH_HASH (txn, struct ovsdb_idl_txn, hmap_node,
+ json_hash(id, 0), &idl->outstanding_txns) {
+ if (json_equal(id, txn->request_id)) {
+ return txn;
+ }
+ }
+ return NULL;
+}
+
+static bool
+check_json_type(const struct json *json, enum json_type type, const char *name)
+{
+ if (!json) {
+ VLOG_WARN_RL(&syntax_rl, "%s is missing", name);
+ return false;
+ } else if (json->type != type) {
+ VLOG_WARN_RL(&syntax_rl, "%s is %s instead of %s",
+ name, json_type_to_string(json->type),
+ json_type_to_string(type));
+ return false;
+ } else {
+ return true;
+ }
+}
+
+static bool
+ovsdb_idl_txn_process_inc_reply(struct ovsdb_idl_txn *txn,
+ const struct json_array *results)
+{
+ struct json *count, *rows, *row, *column;
+ struct shash *mutate, *select;
+
+ if (txn->inc_index + 2 > results->n) {
+ VLOG_WARN_RL(&syntax_rl, "reply does not contain enough operations "
+ "for increment (has %zu, needs %u)",
+ results->n, txn->inc_index + 2);
+ return false;
+ }
+
+ /* We know that this is a JSON object because the loop in
+ * ovsdb_idl_txn_process_reply() checked. */
+ mutate = json_object(results->elems[txn->inc_index]);
+ count = shash_find_data(mutate, "count");
+ if (!check_json_type(count, JSON_INTEGER, "\"mutate\" reply \"count\"")) {
+ return false;
+ }
+ if (count->u.integer != 1) {
+ VLOG_WARN_RL(&syntax_rl,
+ "\"mutate\" reply \"count\" is %lld instead of 1",
+ count->u.integer);
+ return false;
+ }
+
+ select = json_object(results->elems[txn->inc_index + 1]);
+ rows = shash_find_data(select, "rows");
+ if (!check_json_type(rows, JSON_ARRAY, "\"select\" reply \"rows\"")) {
+ return false;
+ }
+ if (rows->u.array.n != 1) {
+ VLOG_WARN_RL(&syntax_rl, "\"select\" reply \"rows\" has %zu elements "
+ "instead of 1",
+ rows->u.array.n);
+ return false;
+ }
+ row = rows->u.array.elems[0];
+ if (!check_json_type(row, JSON_OBJECT, "\"select\" reply row")) {
+ return false;
+ }
+ column = shash_find_data(json_object(row), txn->inc_column);
+ if (!check_json_type(column, JSON_INTEGER,
+ "\"select\" reply inc column")) {
+ return false;
+ }
+ txn->inc_new_value = column->u.integer;
+ return true;
+}
+
+static bool
+ovsdb_idl_txn_process_insert_reply(struct ovsdb_idl_txn_insert *insert,
+ const struct json_array *results)
+{
+ static const struct ovsdb_base_type uuid_type = OVSDB_BASE_UUID_INIT;
+ struct ovsdb_error *error;
+ struct json *json_uuid;
+ union ovsdb_atom uuid;
+ struct shash *reply;
+
+ if (insert->op_index >= results->n) {
+ VLOG_WARN_RL(&syntax_rl, "reply does not contain enough operations "
+ "for insert (has %zu, needs %u)",
+ results->n, insert->op_index);
+ return false;
+ }
+
+ /* We know that this is a JSON object because the loop in
+ * ovsdb_idl_txn_process_reply() checked. */
+ reply = json_object(results->elems[insert->op_index]);
+ json_uuid = shash_find_data(reply, "uuid");
+ if (!check_json_type(json_uuid, JSON_ARRAY, "\"insert\" reply \"uuid\"")) {
+ return false;
+ }
+
+ error = ovsdb_atom_from_json(&uuid, &uuid_type, json_uuid, NULL);
+ if (error) {
+ char *s = ovsdb_error_to_string(error);
+ VLOG_WARN_RL(&syntax_rl, "\"insert\" reply \"uuid\" is not a JSON "
+ "UUID: %s", s);
+ free(s);
+ return false;
+ }
+
+ insert->real = uuid.uuid;
+
+ return true;
+}
+
+static bool
+ovsdb_idl_txn_process_reply(struct ovsdb_idl *idl,
+ const struct jsonrpc_msg *msg)
+{
+ struct ovsdb_idl_txn *txn;
+ enum ovsdb_idl_txn_status status;
+
+ txn = ovsdb_idl_txn_find(idl, msg->id);
+ if (!txn) {
+ return false;
+ }
+
+ if (msg->type == JSONRPC_ERROR) {
+ status = TXN_ERROR;
+ } else if (msg->result->type != JSON_ARRAY) {
+ VLOG_WARN_RL(&syntax_rl, "reply to \"transact\" is not JSON array");
+ status = TXN_ERROR;
+ } else {
+ struct json_array *ops = &msg->result->u.array;
+ int hard_errors = 0;
+ int soft_errors = 0;
+ size_t i;
+
+ for (i = 0; i < ops->n; i++) {
+ struct json *op = ops->elems[i];
+
+ if (op->type == JSON_NULL) {
+ /* This isn't an error in itself but indicates that some prior
+ * operation failed, so make sure that we know about it. */
+ soft_errors++;
+ } else if (op->type == JSON_OBJECT) {
+ struct json *error;
+
+ error = shash_find_data(json_object(op), "error");
+ if (error) {
+ if (error->type == JSON_STRING) {
+ if (!strcmp(error->u.string, "timed out")) {
+ soft_errors++;
+ } else if (strcmp(error->u.string, "aborted")) {
+ hard_errors++;
+ ovsdb_idl_txn_set_error_json(txn, op);
+ }
+ } else {
+ hard_errors++;
+ ovsdb_idl_txn_set_error_json(txn, op);
+ VLOG_WARN_RL(&syntax_rl,
+ "\"error\" in reply is not JSON string");
+ }
+ }
+ } else {
+ hard_errors++;
+ ovsdb_idl_txn_set_error_json(txn, op);
+ VLOG_WARN_RL(&syntax_rl,
+ "operation reply is not JSON null or object");
+ }
+ }
+
+ if (!soft_errors && !hard_errors) {
+ struct ovsdb_idl_txn_insert *insert;
+
+ if (txn->inc_table && !ovsdb_idl_txn_process_inc_reply(txn, ops)) {
+ hard_errors++;
+ }
+
+ HMAP_FOR_EACH (insert, struct ovsdb_idl_txn_insert, hmap_node,
+ &txn->inserted_rows) {
+ if (!ovsdb_idl_txn_process_insert_reply(insert, ops)) {
+ hard_errors++;
+ }
+ }
+ }
+
+ status = (hard_errors ? TXN_ERROR
+ : soft_errors ? TXN_TRY_AGAIN
+ : TXN_SUCCESS);
+ }
+
+ ovsdb_idl_txn_complete(txn, status);
+ return true;
+}
+
+struct ovsdb_idl_txn *
+ovsdb_idl_txn_get(const struct ovsdb_idl_row *row)
+{
+ struct ovsdb_idl_txn *txn = row->table->idl->txn;
+ assert(txn != NULL);
+ return txn;
+}
+
+struct ovsdb_idl *
+ovsdb_idl_txn_get_idl (struct ovsdb_idl_txn *txn)
+{
+ return txn->idl;
+}
+