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 9cb2eb4a695648bfb3f4002248ffdeae3a6d6d64..6c10c910d8207be651e41e7c720be9a679e1972c 100644 (file)
--- a/src/lib/lttng-ctl/lttng-ctl.c
+++ b/src/lib/lttng-ctl/lttng-ctl.c
@@ -1773,6 +1773,8 @@ int lttng_list_events(struct lttng_handle *handle,
                        (struct lttcomm_event_extended_header *) extended_at;
                extended_at += sizeof(*ext_header);
                extended_at += ext_header->filter_len;
+               extended_at +=
+                       ext_header->nb_exclusions * LTTNG_SYMBOL_NAME_LEN;
        }
 
        return ret;
@@ -1782,6 +1784,99 @@ error:
        return ret;
 }
 
+int lttng_event_get_filter_string(struct lttng_event *event,
+       const char **filter_string)
+{
+       int ret = 0;
+       struct lttcomm_event_extended_header *ext_header;
+
+       if (!event || !filter_string) {
+               ret = -LTTNG_ERR_INVALID;
+               goto end;
+       }
+
+       ext_header = event->extended.ptr;
+
+       if (!ext_header) {
+               /*
+                * This can happen since the lttng_event structure is
+                * used for other tasks where this pointer is never set.
+                */
+               *filter_string = NULL;
+               goto end;
+       }
+
+       if (ext_header->filter_len) {
+               *filter_string = ((const char *) (ext_header)) +
+                       sizeof(*ext_header);
+       } else {
+               *filter_string = NULL;
+       }
+
+end:
+       return ret;
+}
+
+int lttng_event_get_exclusion_name_count(struct lttng_event *event)
+{
+       int ret;
+       struct lttcomm_event_extended_header *ext_header;
+
+       if (!event) {
+               ret = -LTTNG_ERR_INVALID;
+               goto end;
+       }
+
+       ext_header = event->extended.ptr;
+       if (!ext_header) {
+               /*
+                * This can happen since the lttng_event structure is
+                * used for other tasks where this pointer is never set.
+                */
+               ret = 0;
+               goto end;
+       }
+
+       if (ext_header->nb_exclusions > INT_MAX) {
+               ret = -LTTNG_ERR_OVERFLOW;
+               goto end;
+       }
+       ret = (int) ext_header->nb_exclusions;
+end:
+       return ret;
+}
+
+int lttng_event_get_exclusion_name(struct lttng_event *event,
+               size_t index, const char **exclusion_name)
+{
+       int ret = 0;
+       struct lttcomm_event_extended_header *ext_header;
+       void *at;
+
+       if (!event || !exclusion_name) {
+               ret = -LTTNG_ERR_INVALID;
+               goto end;
+       }
+
+       ext_header = event->extended.ptr;
+       if (!ext_header) {
+               ret = -LTTNG_ERR_INVALID;
+               goto end;
+       }
+
+       if (index >= ext_header->nb_exclusions) {
+               ret = -LTTNG_ERR_INVALID;
+               goto end;
+       }
+
+       at = (void *) ext_header + sizeof(*ext_header);
+       at += ext_header->filter_len;
+       at += index * LTTNG_SYMBOL_NAME_LEN;
+       *exclusion_name = at;
+
+end:
+       return ret;
+}
 
 /*
  * Sets the tracing_group variable with name.
@@ -1879,6 +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.
  *