Implement LOG_CONNEVENTS watcher flag for connection state transitions

Add support for `watch connevents` to report opened (`conn_new`)
and closed (`conn_close`) client connections. Event log lines indicate
the connection's remote IP, remote port, and transport type.
`conn_close` events additionally supply a reason for the closing the
connection.

1 files changed, 11 insertions, 0 deletions

diff --git a/logger.h b/logger.h
index 715f3af..5492f72 100644
--- a/logger.h
+++ b/logger.h
@@ -20,6 +20,8 @@ enum log_entry_type {
     LOGGER_ITEM_STORE,
     LOGGER_CRAWLER_STATUS,
     LOGGER_SLAB_MOVE,
+    LOGGER_CONNECTION_NEW,
+    LOGGER_CONNECTION_CLOSE,
 #ifdef EXTSTORE
     LOGGER_EXTSTORE_WRITE,
     LOGGER_COMPACT_START,
@@ -36,6 +38,8 @@ enum log_entry_subtype {
     LOGGER_EVICTION_ENTRY,
     LOGGER_ITEM_GET_ENTRY,
     LOGGER_ITEM_STORE_ENTRY,
+    LOGGER_CONNECTION_NEW_ENTRY,
+    LOGGER_CONNECTION_CLOSE_ENTRY,
 #ifdef EXTSTORE
     LOGGER_EXT_WRITE_ENTRY,
 #endif
@@ -101,6 +105,13 @@ struct logentry_item_store {
     char key[];
 };
 
+struct logentry_conn_event {
+    int transport;
+    int reason;
+    int sfd;
+    struct sockaddr addr;
+};
+
 /* end intermediary structures */
 
 /* WARNING: cuddled items aren't compatible with warm restart. more code