MINOR: receiver: add RX_F_MUST_DUP to indicate that an rx must be duped

The purpose of this new flag will be to mark that some listeners
duplicate their reference's FD instead of trying to setup a completely
new listener from scratch. This will be used when multiple groups want
to listen to the same socket, via multiple FDs.

diff --git a/include/haproxy/receiver-t.h b/include/haproxy/receiver-t.h
index 07155896ea2ec5e30367c90fb9da1a1bfe56f00b..fcf43504d51e91247d557713f8b6951b6468e118 100644 (file)
--- a/include/haproxy/receiver-t.h
+++ b/include/haproxy/receiver-t.h
@@ -31,8 +31,9 @@
 
 /* Bit values for receiver->flags */
 #define RX_F_BOUND              0x00000001  /* receiver already bound */
-#define RX_F_INHERITED          0x00000002  /* inherited FD from the parent process (fd@) */
+#define RX_F_INHERITED          0x00000002  /* inherited FD from the parent process (fd@) or duped from another local receiver */
 #define RX_F_MWORKER            0x00000004  /* keep the FD open in the master but close it in the children */
+#define RX_F_MUST_DUP           0x00000008  /* this receiver's fd must be dup() from a reference; ignore socket-level ops here */
 
 /* Bit values for rx_settings->options */
 #define RX_O_FOREIGN            0x00000001  /* receives on foreign addresses */