static struct json *
ovsdb_clause_to_json(const struct ovsdb_clause *clause)
{
return json_array_create_3(
json_string_create(clause->column->name),
json_string_create(ovsdb_function_to_string(clause->function)),
ovsdb_datum_to_json(&clause->arg, &clause->column->type));
}
static void
table_print_json__(const struct table *table, const struct table_style *style)
{
struct json *json, *headings, *data;
size_t x, y;
char *s;
json = json_object_create();
if (table->caption) {
json_object_put_string(json, "caption", table->caption);
}
if (table->timestamp) {
char *s = table_format_timestamp__();
json_object_put_string(json, "time", s);
free(s);
}
headings = json_array_create_empty();
for (x = 0; x < table->n_columns; x++) {
const struct column *column = &table->columns[x];
json_array_add(headings, json_string_create(column->heading));
}
json_object_put(json, "headings", headings);
data = json_array_create_empty();
for (y = 0; y < table->n_rows; y++) {
struct json *row = json_array_create_empty();
for (x = 0; x < table->n_columns; x++) {
const struct cell *cell = table_cell__(table, y, x);
if (cell->text) {
json_array_add(row, json_string_create(cell->text));
} else if (cell->json) {
json_array_add(row, json_clone(cell->json));
} else {
json_array_add(row, json_null_create());
}
}
json_array_add(data, row);
}
json_object_put(json, "data", data);
s = json_to_string(json, style->json_flags);
json_destroy(json);
puts(s);
free(s);
}
void slayer_server_log_add_error(slayer_server_log_manager_t *manager, apr_pool_t *mpool,
const char *client_ip,apr_int64_t rtime,
const char *request_line, const char *error_msg ) {
json_value *container = json_object_create(mpool);
json_object_add(container,"client_ip",json_string_create(mpool,client_ip));
json_object_add(container,"request_time",json_long_create(mpool,rtime / (1000*1000)));
json_object_add(container,"request",json_string_create(mpool,request_line));
json_object_add(container,"error",json_string_create(mpool,error_msg));
char *json_entry = strdup(json_serialize(mpool,container)); //we want our own copy of this data
//smallest chunk in the mutex
apr_thread_mutex_lock(manager->list_mutex);
manager->offset++;
if (manager->offset == manager->nentries) manager->offset = 0;
free(manager->entries[manager->offset].json_view);
manager->entries[manager->offset].json_view = json_entry;
apr_thread_mutex_unlock(manager->list_mutex);
}
static struct ovsdb_schema *
fetch_schema(struct jsonrpc *rpc, const char *database)
{
struct jsonrpc_msg *request, *reply;
struct ovsdb_schema *schema;
request = jsonrpc_create_request("get_schema",
json_array_create_1(
json_string_create(database)),
NULL);
check_txn(jsonrpc_transact_block(rpc, request, &reply), &reply);
check_ovsdb_error(ovsdb_schema_from_json(reply->result, &schema));
jsonrpc_msg_destroy(reply);
return schema;
}
void
jsonrpc_session_run(struct jsonrpc_session *s)
{
if (s->pstream) {
struct stream *stream;
int error;
error = pstream_accept(s->pstream, &stream);
if (!error) {
if (s->rpc || s->stream) {
VLOG_INFO_RL(&rl,
"%s: new connection replacing active connection",
reconnect_get_name(s->reconnect));
jsonrpc_session_disconnect(s);
}
reconnect_connected(s->reconnect, time_msec());
s->rpc = jsonrpc_open(stream);
} else if (error != EAGAIN) {
reconnect_listen_error(s->reconnect, time_msec(), error);
pstream_close(s->pstream);
s->pstream = NULL;
}
}
if (s->rpc) {
size_t backlog;
int error;
backlog = jsonrpc_get_backlog(s->rpc);
jsonrpc_run(s->rpc);
if (jsonrpc_get_backlog(s->rpc) < backlog) {
/* Data previously caught in a queue was successfully sent (or
* there's an error, which we'll catch below.)
*
* We don't count data that is successfully sent immediately as
* activity, because there's a lot of queuing downstream from us,
* which means that we can push a lot of data into a connection
* that has stalled and won't ever recover.
*/
reconnect_activity(s->reconnect, time_msec());
}
error = jsonrpc_get_status(s->rpc);
if (error) {
reconnect_disconnected(s->reconnect, time_msec(), error);
jsonrpc_session_disconnect(s);
s->last_error = error;
}
} else if (s->stream) {
int error;
stream_run(s->stream);
error = stream_connect(s->stream);
if (!error) {
reconnect_connected(s->reconnect, time_msec());
s->rpc = jsonrpc_open(s->stream);
s->stream = NULL;
} else if (error != EAGAIN) {
reconnect_connect_failed(s->reconnect, time_msec(), error);
stream_close(s->stream);
s->stream = NULL;
s->last_error = error;
}
}
switch (reconnect_run(s->reconnect, time_msec())) {
case RECONNECT_CONNECT:
jsonrpc_session_connect(s);
break;
case RECONNECT_DISCONNECT:
reconnect_disconnected(s->reconnect, time_msec(), 0);
jsonrpc_session_disconnect(s);
break;
case RECONNECT_PROBE:
if (s->rpc) {
struct json *params;
struct jsonrpc_msg *request;
params = json_array_create_empty();
request = jsonrpc_create_request("echo", params, NULL);
json_destroy(request->id);
request->id = json_string_create("echo");
jsonrpc_send(s->rpc, request);
}
break;
}
}
void
replication_run(void)
{
if (!session) {
return;
}
jsonrpc_session_run(session);
for (int i = 0; jsonrpc_session_is_connected(session) && i < 50; i++) {
struct jsonrpc_msg *msg;
unsigned int seqno;
seqno = jsonrpc_session_get_seqno(session);
if (seqno != session_seqno || state == RPL_S_INIT) {
session_seqno = seqno;
request_ids_clear();
struct jsonrpc_msg *request;
request = jsonrpc_create_request("list_dbs",
json_array_create_empty(), NULL);
request_ids_add(request->id, NULL);
jsonrpc_session_send(session, request);
replication_dbs_destroy();
replication_dbs = replication_db_clone(&local_dbs);
state = RPL_S_DB_REQUESTED;
VLOG_DBG("Send list_dbs request");
}
msg = jsonrpc_session_recv(session);
if (!msg) {
continue;
}
if (msg->type == JSONRPC_NOTIFY && state != RPL_S_ERR
&& !strcmp(msg->method, "update")) {
if (msg->params->type == JSON_ARRAY
&& msg->params->u.array.n == 2
&& msg->params->u.array.elems[0]->type == JSON_STRING) {
char *db_name = msg->params->u.array.elems[0]->u.string;
struct ovsdb *db = find_db(db_name);
if (db) {
struct ovsdb_error *error;
error = process_notification(msg->params->u.array.elems[1],
db);
if (error) {
ovsdb_error_assert(error);
state = RPL_S_ERR;
}
}
}
} else if (msg->type == JSONRPC_REPLY) {
struct ovsdb *db;
if (!request_ids_lookup_and_free(msg->id, &db)) {
VLOG_WARN("received unexpected reply");
goto next;
}
switch (state) {
case RPL_S_DB_REQUESTED:
if (msg->result->type != JSON_ARRAY) {
struct ovsdb_error *error;
error = ovsdb_error("list-dbs failed",
"list_dbs response is not array");
ovsdb_error_assert(error);
state = RPL_S_ERR;
} else {
size_t i;
for (i = 0; i < msg->result->u.array.n; i++) {
const struct json *name = msg->result->u.array.elems[i];
if (name->type == JSON_STRING) {
/* Send one schema request for each remote DB. */
const char *db_name = json_string(name);
struct ovsdb *db = find_db(db_name);
if (db) {
struct jsonrpc_msg *request =
jsonrpc_create_request(
"get_schema",
json_array_create_1(
json_string_create(db_name)),
NULL);
request_ids_add(request->id, db);
jsonrpc_session_send(session, request);
}
}
}
VLOG_DBG("Send schema requests");
state = RPL_S_SCHEMA_REQUESTED;
}
break;
case RPL_S_SCHEMA_REQUESTED: {
struct ovsdb_schema *schema;
struct ovsdb_error *error;
error = ovsdb_schema_from_json(msg->result, &schema);
if (error) {
ovsdb_error_assert(error);
state = RPL_S_ERR;
}
if (db != find_db(schema->name)) {
/* Unexpected schema. */
VLOG_WARN("unexpected schema %s", schema->name);
state = RPL_S_ERR;
} else if (!ovsdb_schema_equal(schema, db->schema)) {
/* Schmea version mismatch. */
VLOG_INFO("Schema version mismatch, %s not replicated",
schema->name);
shash_find_and_delete(replication_dbs, schema->name);
}
ovsdb_schema_destroy(schema);
/* After receiving schemas, reset the local databases that
* will be monitored and send out monitor requests for them. */
if (hmap_is_empty(&request_ids)) {
struct shash_node *node, *next;
SHASH_FOR_EACH_SAFE (node, next, replication_dbs) {
db = node->data;
struct ovsdb_error *error = reset_database(db);
if (error) {
const char *db_name = db->schema->name;
shash_find_and_delete(replication_dbs, db_name);
ovsdb_error_assert(error);
VLOG_WARN("Failed to reset database, "
"%s not replicated.", db_name);
}
}
if (shash_is_empty(replication_dbs)) {
VLOG_WARN("Nothing to replicate.");
state = RPL_S_ERR;
} else {
SHASH_FOR_EACH (node, replication_dbs) {
db = node->data;
struct ovsdb *db = node->data;
struct jsonrpc_msg *request =
create_monitor_request(db);
request_ids_add(request->id, db);
jsonrpc_session_send(session, request);
VLOG_DBG("Send monitor requests");
state = RPL_S_MONITOR_REQUESTED;
}
}
}
break;
}
case RPL_S_MONITOR_REQUESTED: {
/* Reply to monitor requests. */
struct ovsdb_error *error;
error = process_notification(msg->result, db);
if (error) {
ovsdb_error_assert(error);
state = RPL_S_ERR;
} else {
/* Transition to replicating state after receiving
* all replies of "monitor" requests. */
if (hmap_is_empty(&request_ids)) {
VLOG_DBG("Listening to monitor updates");
state = RPL_S_REPLICATING;
}
}
break;
}
case RPL_S_ERR:
/* Ignore all messages */
break;
case RPL_S_INIT:
case RPL_S_REPLICATING:
default:
OVS_NOT_REACHED();
}
}
struct json *
ovsdb_atomic_type_to_json(enum ovsdb_atomic_type type)
{
return json_string_create(ovsdb_atomic_type_to_string(type));
}
struct json *
ovsdb_base_type_to_json(const struct ovsdb_base_type *base)
{
struct json *json;
if (!ovsdb_base_type_has_constraints(base)) {
return json_string_create(ovsdb_atomic_type_to_string(base->type));
}
json = json_object_create();
json_object_put_string(json, "type",
ovsdb_atomic_type_to_string(base->type));
if (base->enum_) {
const struct ovsdb_type *type;
type = ovsdb_base_type_get_enum_type(base->type);
json_object_put(json, "enum", ovsdb_datum_to_json(base->enum_, type));
}
switch (base->type) {
case OVSDB_TYPE_VOID:
NOT_REACHED();
case OVSDB_TYPE_INTEGER:
if (base->u.integer.min != INT64_MIN) {
json_object_put(json, "minInteger",
json_integer_create(base->u.integer.min));
}
if (base->u.integer.max != INT64_MAX) {
json_object_put(json, "maxInteger",
json_integer_create(base->u.integer.max));
}
break;
case OVSDB_TYPE_REAL:
if (base->u.real.min != -DBL_MAX) {
json_object_put(json, "minReal",
json_real_create(base->u.real.min));
}
if (base->u.real.max != DBL_MAX) {
json_object_put(json, "maxReal",
json_real_create(base->u.real.max));
}
break;
case OVSDB_TYPE_BOOLEAN:
break;
case OVSDB_TYPE_STRING:
if (base->u.string.minLen != 0) {
json_object_put(json, "minLength",
json_integer_create(base->u.string.minLen));
}
if (base->u.string.maxLen != UINT_MAX) {
json_object_put(json, "maxLength",
json_integer_create(base->u.string.maxLen));
}
break;
case OVSDB_TYPE_UUID:
if (base->u.uuid.refTableName) {
json_object_put_string(json, "refTable",
base->u.uuid.refTableName);
if (base->u.uuid.refType == OVSDB_REF_WEAK) {
json_object_put_string(json, "refType", "weak");
}
}
break;
case OVSDB_N_TYPES:
NOT_REACHED();
default:
NOT_REACHED();
}
return json;
}
void
jsonrpc_session_run(struct jsonrpc_session *s)
{
if (s->pstream) {
struct stream *stream;
int error;
error = pstream_accept(s->pstream, &stream);
if (!error) {
if (s->rpc || s->stream) {
VLOG_INFO_RL(&rl,
"%s: new connection replacing active connection",
reconnect_get_name(s->reconnect));
jsonrpc_session_disconnect(s);
}
reconnect_connected(s->reconnect, time_msec());
s->rpc = jsonrpc_open(stream);
} else if (error != EAGAIN) {
reconnect_listen_error(s->reconnect, time_msec(), error);
pstream_close(s->pstream);
s->pstream = NULL;
}
}
if (s->rpc) {
int error;
jsonrpc_run(s->rpc);
error = jsonrpc_get_status(s->rpc);
if (error) {
reconnect_disconnected(s->reconnect, time_msec(), error);
jsonrpc_session_disconnect(s);
}
} else if (s->stream) {
int error;
stream_run(s->stream);
error = stream_connect(s->stream);
if (!error) {
reconnect_connected(s->reconnect, time_msec());
s->rpc = jsonrpc_open(s->stream);
s->stream = NULL;
} else if (error != EAGAIN) {
reconnect_connect_failed(s->reconnect, time_msec(), error);
stream_close(s->stream);
s->stream = NULL;
}
}
switch (reconnect_run(s->reconnect, time_msec())) {
case RECONNECT_CONNECT:
jsonrpc_session_connect(s);
break;
case RECONNECT_DISCONNECT:
reconnect_disconnected(s->reconnect, time_msec(), 0);
jsonrpc_session_disconnect(s);
break;
case RECONNECT_PROBE:
if (s->rpc) {
struct json *params;
struct jsonrpc_msg *request;
params = json_array_create_empty();
request = jsonrpc_create_request("echo", params, NULL);
json_destroy(request->id);
request->id = json_string_create("echo");
jsonrpc_send(s->rpc, request);
}
break;
}
}
