[PATCH 1/3] socket add support for socket BPF filter related to SO_REUSEPORT

[David CARLIER]

Hi,

here a little patchset proposal to support cpu locality over a socket.

I would understand if it is rejected tough no problems.

Thanks.

From f207b3e1f4cfaf9a1682778be747378e7146ce82 Mon Sep 17 00:00:00 2001
From: David Carlier <devne...@gmail.com>
Date: Fri, 17 Dec 2021 17:19:48 +0000
Subject: [PATCH 1/3] MINOR: socket Adds support got reuseportbpf new
 configuration directive.

configuration parsing bit and new flag.
---
 include/haproxy/compat.h   | 4 ++++
 include/haproxy/global-t.h | 3 +++
 src/cfgparse-global.c      | 5 +++++
 3 files changed, 12 insertions(+)

diff --git a/include/haproxy/compat.h b/include/haproxy/compat.h
index f8afe1b5c..7d34ac4cb 100644
--- a/include/haproxy/compat.h
+++ b/include/haproxy/compat.h
@@ -159,6 +159,10 @@ typedef struct { } empty_t;
 #include <linux/netfilter_ipv4.h>
 #endif
 
+#if defined(SO_ATTACH_REUSEPORT_CBPF)
+#include <linux/filter.h>
+#endif
+
 /* On Linux, IP_TRANSPARENT and/or IP_FREEBIND generally require a kernel patch */
 #if defined(USE_LINUX_TPROXY)
 #if !defined(IP_FREEBIND)
diff --git a/include/haproxy/global-t.h b/include/haproxy/global-t.h
index fb01e0768..8d65df4ee 100644
--- a/include/haproxy/global-t.h
+++ b/include/haproxy/global-t.h
@@ -72,6 +72,9 @@
 #define GTUNE_SCHED_LOW_LATENCY  (1<<19)
 #define GTUNE_IDLE_POOL_SHARED   (1<<20)
 #define GTUNE_DISABLE_H2_WEBSOCKET (1<<21)
+#define GTUNE_USE_REUSEPORTBPF   (1<<22)
+
+#define GTUNE_LAST               (1<<31)
 
 /* SSL server verify mode */
 enum {
diff --git a/src/cfgparse-global.c b/src/cfgparse-global.c
index a9e1b9480..9bad9b547 100644
--- a/src/cfgparse-global.c
+++ b/src/cfgparse-global.c
@@ -167,6 +167,11 @@ int cfg_parse_global(const char *file, int linenum, char **args, int kwm)
 			goto out;
 		global.tune.options &= ~GTUNE_USE_REUSEPORT;
 	}
+	else if (strcmp(args[0], "reuseportbpf") == 0) {
+		if (alertif_too_many_args(0, file, linenum, args, &err_code))
+			goto out;
+		global.tune.options |= GTUNE_USE_REUSEPORTBPF;
+	}
 	else if (strcmp(args[0], "quiet") == 0) {
 		if (alertif_too_many_args(0, file, linenum, args, &err_code))
 			goto out;
-- 
2.32.0