[PATCH] Events: closed unused listening fds in worker processes.

[Zexuan Luo]

# HG changeset patch
# User spacewander <spacewanderlzx at gmail.com>
# Date 1555581540 -28800
#      Thu Apr 18 17:59:00 2019 +0800
# Branch ident
# Node ID 4fb5603514f2d324c50cb7e12c6ed0dc8935de0f
# Parent  e0834ca20c9c68c4f0728f85efb3651732134ee2
Events: closed unused listening fds in worker processes.

It doesn't affect the listening socket, since there is
only one used fd which associates to the socket with or
without this change.

diff -r e0834ca20c9c -r 4fb5603514f2 src/core/ngx_connection.c
--- a/src/core/ngx_connection.c    Thu Apr 05 12:33:14 2018 +0800
+++ b/src/core/ngx_connection.c    Thu Apr 18 17:59:00 2019 +0800
@@ -975,6 +975,14 @@
     ls = cycle->listening.elts;
     for (i = 0; i < cycle->listening.nelts; i++) {

+#if (NGX_HAVE_REUSEPORT)
+
+        if (ls[i].fd == (ngx_socket_t) -1) {
+            continue;
+        }
+
+#endif
+
         c = ls[i].connection;

         if (c) {
diff -r e0834ca20c9c -r 4fb5603514f2 src/event/ngx_event.c
--- a/src/event/ngx_event.c    Thu Apr 05 12:33:14 2018 +0800
+++ b/src/event/ngx_event.c    Thu Apr 18 17:59:00 2019 +0800
@@ -735,6 +735,18 @@

 #if (NGX_HAVE_REUSEPORT)
         if (ls[i].reuseport && ls[i].worker != ngx_worker) {
+            ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
+                           "close unused listening %V #%d ",
+                           &ls[i].addr_text, ls[i].fd);
+
+            if (ngx_close_socket(ls[i].fd) == -1) {
+                ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
+                              ngx_close_socket_n " %V failed",
+                              &ls[i].addr_text);
+            }
+
+            ls[i].fd = (ngx_socket_t) -1;
+
             continue;
         }
 #endif