#include "buffer.h"
#include "poll-loop.h"
#include "ofp-print.h"
+#include "sat-math.h"
#include "timeval.h"
#include "util.h"
#include "vconn.h"
time_t backoff_deadline;
time_t last_received;
time_t last_connected;
-
unsigned int packets_sent;
+ /* These values are simply for statistics reporting, not used directly by
+ * anything internal to the rconn (or the secchan for that matter). */
+ unsigned int packets_received;
+ unsigned int n_attempted_connections, n_successful_connections;
+ time_t creation_time;
+ unsigned long int total_time_connected;
+
/* If we can't connect to the peer, it could be for any number of reasons.
* Usually, one would assume it is because the peer is not running or
* because the network is partitioned. But it could also be because the
* an echo request as an inactivity probe packet. We should receive back
* a response. */
int probe_interval; /* Secs of inactivity before sending probe. */
+
+ /* Messages sent or received are copied to the monitor connections. */
+#define MAX_MONITORS 8
+ struct vconn *monitors[8];
+ size_t n_monitors;
};
-static unsigned int sat_add(unsigned int x, unsigned int y);
-static unsigned int sat_mul(unsigned int x, unsigned int y);
static unsigned int elapsed_in_this_state(const struct rconn *);
static unsigned int timeout(const struct rconn *);
static bool timed_out(const struct rconn *);
static void disconnect(struct rconn *, int error);
static void flush_queue(struct rconn *);
static void question_connectivity(struct rconn *);
+static void copy_to_monitor(struct rconn *, const struct buffer *);
/* Creates a new rconn, connects it (reliably) to 'name', and returns it. */
struct rconn *
rc->packets_sent = 0;
+ rc->packets_received = 0;
+ rc->n_attempted_connections = 0;
+ rc->n_successful_connections = 0;
+ rc->creation_time = time_now();
+ rc->total_time_connected = 0;
+
rc->questionable_connectivity = false;
rc->last_questioned = time_now();
rc->probe_interval = probe_interval ? MAX(5, probe_interval) : 0;
+ rc->n_monitors = 0;
+
return rc;
}
int retval;
VLOG_WARN("%s: connecting...", rc->name);
+ rc->n_attempted_connections++;
retval = vconn_open(rc->name, &rc->vconn);
if (!retval) {
rc->backoff_deadline = time_now() + rc->backoff;
int retval = vconn_connect(rc->vconn);
if (!retval) {
VLOG_WARN("%s: connected", rc->name);
+ rc->n_successful_connections++;
if (vconn_is_passive(rc->vconn)) {
error(0, "%s: passive vconn not supported", rc->name);
state_transition(rc, S_VOID);
static void
do_tx_work(struct rconn *rc)
{
+ if (!rc->txq.n) {
+ return;
+ }
while (rc->txq.n > 0) {
int error = try_send(rc);
if (error) {
break;
}
}
+ if (!rc->txq.n) {
+ poll_immediate_wake();
+ }
}
static unsigned int
{
if (timed_out(rc)) {
unsigned int base = MAX(rc->last_received, rc->state_entered);
- queue_push_tail(&rc->txq, make_echo_request());
+ rconn_send(rc, make_echo_request(), NULL);
VLOG_DBG("%s: idle %u seconds, sending inactivity probe",
rc->name, (unsigned int) (time_now() - base));
state_transition(rc, S_IDLE);
{
unsigned int timeo = timeout(rc);
if (timeo != UINT_MAX) {
- poll_timer_wait(sat_mul(timeo, 1000));
+ unsigned int expires = sat_add(rc->state_entered, timeo);
+ unsigned int remaining = sat_sub(expires, time_now());
+ poll_timer_wait(sat_mul(remaining, 1000));
}
if ((rc->state & (S_ACTIVE | S_IDLE)) && rc->txq.n) {
struct buffer *buffer;
int error = vconn_recv(rc->vconn, &buffer);
if (!error) {
+ copy_to_monitor(rc, buffer);
rc->last_received = time_now();
+ rc->packets_received++;
if (rc->state == S_IDLE) {
state_transition(rc, S_ACTIVE);
}
int
rconn_send(struct rconn *rc, struct buffer *b, int *n_queued)
{
- if (rc->vconn) {
+ if (rconn_is_connected(rc)) {
+ copy_to_monitor(rc, b);
b->private = n_queued;
if (n_queued) {
++*n_queued;
/* Sends 'b' on 'rc'. Increments '*n_queued' while the packet is in flight; it
* will be decremented when it has been sent (or discarded due to
* disconnection). Returns 0 if successful, EAGAIN if '*n_queued' is already
- * at least as large of 'queue_limit', or ENOTCONN if 'rc' is not currently
+ * at least as large as 'queue_limit', or ENOTCONN if 'rc' is not currently
* connected. Regardless of return value, 'b' is destroyed.
*
* Because 'b' may be sent (or discarded) before this function returns, the
return rc->packets_sent;
}
+/* Adds 'vconn' to 'rc' as a monitoring connection, to which all messages sent
+ * and received on 'rconn' will be copied. 'rc' takes ownership of 'vconn'. */
+void
+rconn_add_monitor(struct rconn *rc, struct vconn *vconn)
+{
+ if (rc->n_monitors < ARRAY_SIZE(rc->monitors)) {
+ VLOG_WARN("new monitor connection from %s", vconn_get_name(vconn));
+ rc->monitors[rc->n_monitors++] = vconn;
+ } else {
+ VLOG_DBG("too many monitor connections, discarding %s",
+ vconn_get_name(vconn));
+ vconn_close(vconn);
+ }
+}
+
/* Returns 'rc''s name (the 'name' argument passed to rconn_new()). */
const char *
rconn_get_name(const struct rconn *rc)
rconn->questionable_connectivity = false;
return questionable;
}
+
+/* Returns the total number of packets successfully received by the underlying
+ * vconn. */
+unsigned int
+rconn_packets_received(const struct rconn *rc)
+{
+ return rc->packets_received;
+}
+
+/* Returns a string representing the internal state of 'rc'. The caller must
+ * not modify or free the string. */
+const char *
+rconn_get_state(const struct rconn *rc)
+{
+ return state_name(rc->state);
+}
+
+/* Returns the number of connection attempts made by 'rc', including any
+ * ongoing attempt that has not yet succeeded or failed. */
+unsigned int
+rconn_get_attempted_connections(const struct rconn *rc)
+{
+ return rc->n_attempted_connections;
+}
+
+/* Returns the number of successful connection attempts made by 'rc'. */
+unsigned int
+rconn_get_successful_connections(const struct rconn *rc)
+{
+ return rc->n_successful_connections;
+}
+
+/* Returns the time at which the last successful connection was made by
+ * 'rc'. */
+time_t
+rconn_get_last_connection(const struct rconn *rc)
+{
+ return rc->last_connected;
+}
+
+/* Returns the time at which 'rc' was created. */
+time_t
+rconn_get_creation_time(const struct rconn *rc)
+{
+ return rc->creation_time;
+}
+
+/* Returns the approximate number of seconds that 'rc' has been connected. */
+unsigned long int
+rconn_get_total_time_connected(const struct rconn *rc)
+{
+ return (rc->total_time_connected
+ + (rconn_is_connected(rc) ? elapsed_in_this_state(rc) : 0));
+}
+
+/* Returns the current amount of backoff, in seconds. This is the amount of
+ * time after which the rconn will transition from BACKOFF to CONNECTING. */
+int
+rconn_get_backoff(const struct rconn *rc)
+{
+ return rc->backoff;
+}
+
+/* Returns the number of seconds spent in this state so far. */
+unsigned int
+rconn_get_state_elapsed(const struct rconn *rc)
+{
+ return elapsed_in_this_state(rc);
+}
\f
/* Tries to send a packet from 'rc''s send buffer. Returns 0 if successful,
* otherwise a positive errno value. */
static void
flush_queue(struct rconn *rc)
{
+ if (!rc->txq.n) {
+ return;
+ }
while (rc->txq.n > 0) {
struct buffer *b = queue_pop_head(&rc->txq);
int *n_queued = b->private;
}
buffer_delete(b);
}
+ poll_immediate_wake();
}
static unsigned int
static void
state_transition(struct rconn *rc, enum state state)
{
+ if (rconn_is_connected(rc)) {
+ rc->total_time_connected += elapsed_in_this_state(rc);
+ }
VLOG_DBG("%s: entering %s", rc->name, state_name(state));
rc->state = state;
rc->state_entered = time_now();
}
-static unsigned int
-sat_add(unsigned int x, unsigned int y)
-{
- return x + y >= x ? x + y : UINT_MAX;
-}
-
-static unsigned int
-sat_mul(unsigned int x, unsigned int y)
-{
- assert(y);
- return x <= UINT_MAX / y ? x * y : UINT_MAX;
-}
-
static void
question_connectivity(struct rconn *rc)
{
rc->last_questioned = now;
}
}
+
+static void
+copy_to_monitor(struct rconn *rc, const struct buffer *b)
+{
+ struct buffer *clone = NULL;
+ int retval;
+ size_t i;
+
+ for (i = 0; i < rc->n_monitors; ) {
+ struct vconn *vconn = rc->monitors[i];
+
+ if (!clone) {
+ clone = buffer_clone(b);
+ }
+ retval = vconn_send(vconn, clone);
+ if (!retval) {
+ clone = NULL;
+ } else if (retval != EAGAIN) {
+ VLOG_DBG("%s: closing monitor connection to %s: %s",
+ rconn_get_name(rc), vconn_get_name(vconn),
+ strerror(retval));
+ rc->monitors[i] = rc->monitors[--rc->n_monitors];
+ continue;
+ }
+ i++;
+ }
+ buffer_delete(clone);
+}
projects / openvswitch / blobdiff