[nginx] Events: moved sockets cloning to ngx_event_init_conf().

[Maxim Dounin]

details:   http://hg.nginx.org/nginx/rev/e7b2b907c0f8
branches:  
changeset: 7315:e7b2b907c0f8
user:      Maxim Dounin <mdounin at mdounin.ru>
date:      Thu Jul 12 19:50:02 2018 +0300
description:
Events: moved sockets cloning to ngx_event_init_conf().

Previously, listenings sockets were not cloned if the worker_processes
directive was specified after "listen ... reuseport".

This also simplifies upcoming configuration check on the number
of worker connections, as it needs to know the number of listening
sockets before cloning.

diffstat:

 src/core/ngx_connection.c |   9 ++++-----
 src/core/ngx_connection.h |   2 +-
 src/event/ngx_event.c     |  25 +++++++++++++++++++++++++
 src/http/ngx_http.c       |   4 ----
 src/stream/ngx_stream.c   |   4 ----
 5 files changed, 30 insertions(+), 14 deletions(-)

diffs (117 lines):

diff --git a/src/core/ngx_connection.c b/src/core/ngx_connection.c
--- a/src/core/ngx_connection.c
+++ b/src/core/ngx_connection.c
@@ -96,7 +96,7 @@ ngx_create_listening(ngx_conf_t *cf, str
 
 
 ngx_int_t
-ngx_clone_listening(ngx_conf_t *cf, ngx_listening_t *ls)
+ngx_clone_listening(ngx_cycle_t *cycle, ngx_listening_t *ls)
 {
 #if (NGX_HAVE_REUSEPORT)
 
@@ -104,20 +104,19 @@ ngx_clone_listening(ngx_conf_t *cf, ngx_
     ngx_core_conf_t  *ccf;
     ngx_listening_t   ols;
 
-    if (!ls->reuseport) {
+    if (!ls->reuseport || ls->worker != 0) {
         return NGX_OK;
     }
 
     ols = *ls;
 
-    ccf = (ngx_core_conf_t *) ngx_get_conf(cf->cycle->conf_ctx,
-                                           ngx_core_module);
+    ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
 
     for (n = 1; n < ccf->worker_processes; n++) {
 
         /* create a socket for each worker process */
 
-        ls = ngx_array_push(&cf->cycle->listening);
+        ls = ngx_array_push(&cycle->listening);
         if (ls == NULL) {
             return NGX_ERROR;
         }
diff --git a/src/core/ngx_connection.h b/src/core/ngx_connection.h
--- a/src/core/ngx_connection.h
+++ b/src/core/ngx_connection.h
@@ -210,7 +210,7 @@ struct ngx_connection_s {
 
 ngx_listening_t *ngx_create_listening(ngx_conf_t *cf, struct sockaddr *sockaddr,
     socklen_t socklen);
-ngx_int_t ngx_clone_listening(ngx_conf_t *cf, ngx_listening_t *ls);
+ngx_int_t ngx_clone_listening(ngx_cycle_t *cycle, ngx_listening_t *ls);
 ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle);
 ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle);
 void ngx_configure_listening_sockets(ngx_cycle_t *cycle);
diff --git a/src/event/ngx_event.c b/src/event/ngx_event.c
--- a/src/event/ngx_event.c
+++ b/src/event/ngx_event.c
@@ -410,12 +410,37 @@ ngx_handle_write_event(ngx_event_t *wev,
 static char *
 ngx_event_init_conf(ngx_cycle_t *cycle, void *conf)
 {
+#if (NGX_HAVE_REUSEPORT)
+    ngx_uint_t        i;
+    ngx_listening_t  *ls;
+#endif
+
     if (ngx_get_conf(cycle->conf_ctx, ngx_events_module) == NULL) {
         ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
                       "no \"events\" section in configuration");
         return NGX_CONF_ERROR;
     }
 
+#if (NGX_HAVE_REUSEPORT)
+
+    ls = cycle->listening.elts;
+    for (i = 0; i < cycle->listening.nelts; i++) {
+
+        if (!ls[i].reuseport || ls[i].worker != 0) {
+            continue;
+        }
+
+        if (ngx_clone_listening(cycle, &ls[i]) != NGX_OK) {
+            return NGX_CONF_ERROR;
+        }
+
+        /* cloning may change cycle->listening.elts */
+
+        ls = cycle->listening.elts;
+    }
+
+#endif
+
     return NGX_CONF_OK;
 }
 
diff --git a/src/http/ngx_http.c b/src/http/ngx_http.c
--- a/src/http/ngx_http.c
+++ b/src/http/ngx_http.c
@@ -1685,10 +1685,6 @@ ngx_http_init_listening(ngx_conf_t *cf, 
             break;
         }
 
-        if (ngx_clone_listening(cf, ls) != NGX_OK) {
-            return NGX_ERROR;
-        }
-
         addr++;
         last--;
     }
diff --git a/src/stream/ngx_stream.c b/src/stream/ngx_stream.c
--- a/src/stream/ngx_stream.c
+++ b/src/stream/ngx_stream.c
@@ -538,10 +538,6 @@ ngx_stream_optimize_servers(ngx_conf_t *
                 break;
             }
 
-            if (ngx_clone_listening(cf, ls) != NGX_OK) {
-                return NGX_CONF_ERROR;
-            }
-
             addr++;
             last--;
         }