Add channel discarded events and lost packets stats accessors

[lttng-tools.git] / src / lib / lttng-ctl / lttng-ctl.c

diff --git a/src/lib/lttng-ctl/lttng-ctl.c b/src/lib/lttng-ctl/lttng-ctl.c
index c7665922f4f014f5b5dd07c6ffae69d6e6887e73..6c10c910d8207be651e41e7c720be9a679e1972c 100644 (file)
--- a/src/lib/lttng-ctl/lttng-ctl.c
+++ b/src/lib/lttng-ctl/lttng-ctl.c
@@ -1974,6 +1974,58 @@ void lttng_channel_set_default_attr(struct lttng_domain *domain,
        }
 }
 
+int lttng_channel_get_discarded_event_count(struct lttng_channel *channel,
+               uint64_t *discarded_events)
+{
+       int ret = 0;
+       struct lttcomm_channel_extended *chan_ext;
+
+       if (!channel || !discarded_events) {
+               ret = -LTTNG_ERR_INVALID;
+               goto end;
+       }
+
+       chan_ext = channel->attr.extended.ptr;
+       if (!chan_ext) {
+               /*
+                * This can happen since the lttng_channel structure is
+                * used for other tasks where this pointer is never set.
+                */
+               *discarded_events = 0;
+               goto end;
+       }
+
+       *discarded_events = chan_ext->discarded_events;
+end:
+       return ret;
+}
+
+int lttng_channel_get_lost_packet_count(struct lttng_channel *channel,
+               uint64_t *lost_packets)
+{
+       int ret = 0;
+       struct lttcomm_channel_extended *chan_ext;
+
+       if (!channel || !lost_packets) {
+               ret = -LTTNG_ERR_INVALID;
+               goto end;
+       }
+
+       chan_ext = channel->attr.extended.ptr;
+       if (!chan_ext) {
+               /*
+                * This can happen since the lttng_channel structure is
+                * used for other tasks where this pointer is never set.
+                */
+               *lost_packets = 0;
+               goto end;
+       }
+
+       *lost_packets = chan_ext->lost_packets;
+end:
+       return ret;
+}
+
 /*
  * Check if session daemon is alive.
  *