/*
- * Copyright (c) 2009, 2010, 2011, 2012 Nicira Networks.
+ * Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
/* This is just the same as stream_open() except that it uses the default
* JSONRPC ports if none is specified. */
int
-jsonrpc_stream_open(const char *name, struct stream **streamp)
+jsonrpc_stream_open(const char *name, struct stream **streamp, uint8_t dscp)
{
return stream_open_with_default_ports(name, JSONRPC_TCP_PORT,
- JSONRPC_SSL_PORT, streamp);
+ JSONRPC_SSL_PORT, streamp,
+ dscp);
}
/* This is just the same as pstream_open() except that it uses the default
* JSONRPC ports if none is specified. */
int
-jsonrpc_pstream_open(const char *name, struct pstream **pstreamp)
+jsonrpc_pstream_open(const char *name, struct pstream **pstreamp, uint8_t dscp)
{
return pstream_open_with_default_ports(name, JSONRPC_TCP_PORT,
- JSONRPC_SSL_PORT, pstreamp);
+ JSONRPC_SSL_PORT, pstreamp, dscp);
}
/* Returns a new JSON-RPC stream that uses 'stream' for input and output. The
return rpc->status ? 0 : rpc->backlog;
}
+/* Returns the number of bytes that have been received on 'rpc''s underlying
+ * stream. (The value wraps around if it exceeds UINT_MAX.) */
+unsigned int
+jsonrpc_get_received_bytes(const struct jsonrpc *rpc)
+{
+ return rpc->input.head;
+}
+
/* Returns 'rpc''s name, that is, the name returned by stream_get_name() for
* the stream underlying 'rpc' when 'rpc' was created. */
const char *
int
jsonrpc_recv(struct jsonrpc *rpc, struct jsonrpc_msg **msgp)
{
+ int i;
+
*msgp = NULL;
if (rpc->status) {
return rpc->status;
}
- while (!rpc->received) {
- if (byteq_is_empty(&rpc->input)) {
+ for (i = 0; i < 50; i++) {
+ if (rpc->received) {
+ *msgp = rpc->received;
+ rpc->received = NULL;
+ return 0;
+ } else if (byteq_is_empty(&rpc->input)) {
size_t chunk;
int retval;
}
}
- *msgp = rpc->received;
- rpc->received = NULL;
- return 0;
+ return EAGAIN;
}
/* Causes the poll loop to wake up when jsonrpc_recv() may return a value other
struct stream *stream;
struct pstream *pstream;
unsigned int seqno;
+ uint8_t dscp;
};
/* Creates and returns a jsonrpc_session to 'name', which should be a string
s->stream = NULL;
s->pstream = NULL;
s->seqno = 0;
+ s->dscp = 0;
if (!pstream_verify_name(name)) {
reconnect_set_passive(s->reconnect, true, time_msec());
}
+ if (!stream_or_pstream_needs_probes(name)) {
+ reconnect_set_probe_interval(s->reconnect, 0);
+ }
+
return s;
}
* On the assumption that such connections are likely to be short-lived
* (e.g. from ovs-vsctl), informational logging for them is suppressed. */
struct jsonrpc_session *
-jsonrpc_session_open_unreliably(struct jsonrpc *jsonrpc)
+jsonrpc_session_open_unreliably(struct jsonrpc *jsonrpc, uint8_t dscp)
{
struct jsonrpc_session *s;
reconnect_set_name(s->reconnect, jsonrpc_get_name(jsonrpc));
reconnect_set_max_tries(s->reconnect, 0);
reconnect_connected(s->reconnect, time_msec());
+ s->dscp = dscp;
s->rpc = jsonrpc;
s->stream = NULL;
s->pstream = NULL;
jsonrpc_session_disconnect(s);
if (!reconnect_is_passive(s->reconnect)) {
- error = jsonrpc_stream_open(name, &s->stream);
+ error = jsonrpc_stream_open(name, &s->stream, s->dscp);
if (!error) {
reconnect_connecting(s->reconnect, time_msec());
}
} else {
- error = s->pstream ? 0 : jsonrpc_pstream_open(name, &s->pstream);
+ error = s->pstream ? 0 : jsonrpc_pstream_open(name, &s->pstream,
+ s->dscp);
if (!error) {
reconnect_listening(s->reconnect, time_msec());
}
}
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_recv(struct jsonrpc_session *s)
{
if (s->rpc) {
+ unsigned int received_bytes;
struct jsonrpc_msg *msg;
+
+ received_bytes = jsonrpc_get_received_bytes(s->rpc);
jsonrpc_recv(s->rpc, &msg);
+ if (received_bytes != jsonrpc_get_received_bytes(s->rpc)) {
+ /* Data was successfully received.
+ *
+ * Previously we only counted receiving a full message as activity,
+ * but with large messages or a slow connection that policy could
+ * time out the session mid-message. */
+ reconnect_activity(s->reconnect, time_msec());
+ }
+
if (msg) {
- reconnect_received(s->reconnect, time_msec());
if (msg->type == JSONRPC_REQUEST && !strcmp(msg->method, "echo")) {
/* Echo request. Send reply. */
struct jsonrpc_msg *reply;
{
reconnect_set_probe_interval(s->reconnect, probe_interval);
}
+
+void
+jsonrpc_session_set_dscp(struct jsonrpc_session *s,
+ uint8_t dscp)
+{
+ if (s->dscp != dscp) {
+ if (s->pstream) {
+ int error;
+
+ error = pstream_set_dscp(s->pstream, dscp);
+ if (error) {
+ VLOG_ERR("%s: failed set_dscp %s",
+ reconnect_get_name(s->reconnect), strerror(error));
+ }
+ /*
+ * TODO:XXX race window between setting dscp to listening socket
+ * and accepting socket. accepted socket may have old dscp value.
+ * Ignore this race window for now.
+ */
+ }
+ s->dscp = dscp;
+ jsonrpc_session_force_reconnect(s);
+ }
+}
projects / openvswitch / blobdiff