bpf-headers: fix use of netlink.h header

netlink.h header have NL_SET_ERR_MSG_MOD that is tied to kmods. We don't
need kmods on bpf tools and this cause compilation error if the header
is included. Fix it by dropping NL_SET_ERR_MSG_MOD.

Link: https://github.com/openwrt/openwrt/pull/11825
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

2 files changed, 74 insertions, 0 deletions

diff --git a/package/kernel/bpf-headers/patches/101-linux-netlink-drop-NL_SET_ERR_MSG-for-kernel-modules.patch b/package/kernel/bpf-headers/patches/101-linux-netlink-drop-NL_SET_ERR_MSG-for-kernel-modules.patch
new file mode 100644
index 0000000000..5771b32954
--- /dev/null
+++ b/package/kernel/bpf-headers/patches/101-linux-netlink-drop-NL_SET_ERR_MSG-for-kernel-modules.patch
@@ -0,0 +1,30 @@
+From 7ed95633bff19950069c348b94c9c13164a57a2a Mon Sep 17 00:00:00 2001
+From: Christian Marangi <ansuelsmth@gmail.com>
+Date: Wed, 18 Jan 2023 20:20:39 +0100
+Subject: [PATCH] linux/netlink: drop NL_SET_ERR_MSG for kernel modules
+
+We don't need NL_SET_ERR_MSG_MOD for bpf modules and we can drop it to
+solve missing KBUILD_MODNAME define.
+
+Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
+---
+ include/linux/netlink.h | 3 ---
+ 1 file changed, 3 deletions(-)
+
+diff --git a/include/linux/netlink.h b/include/linux/netlink.h
+index 61b1c7f..93561fb 100644
+--- a/include/linux/netlink.h
++++ b/include/linux/netlink.h
+@@ -98,9 +98,6 @@ struct netlink_ext_ack {
+ 		__extack->_msg = __msg;			\
+ } while (0)
+ 
+-#define NL_SET_ERR_MSG_MOD(extack, msg)			\
+-	NL_SET_ERR_MSG((extack), KBUILD_MODNAME ": " msg)
+-
+ #define NL_SET_BAD_ATTR_POLICY(extack, attr, pol) do {	\
+ 	if ((extack)) {					\
+ 		(extack)->bad_attr = (attr);		\
+-- 
+2.38.1
+
diff --git a/package/kernel/bpf-headers/patches/102-net-flow_offload-use-NL_SET_ERR_MSG-instead-of-NL_SE.patch b/package/kernel/bpf-headers/patches/102-net-flow_offload-use-NL_SET_ERR_MSG-instead-of-NL_SE.patch
new file mode 100644
index 0000000000..4dec16874e
--- /dev/null
+++ b/package/kernel/bpf-headers/patches/102-net-flow_offload-use-NL_SET_ERR_MSG-instead-of-NL_SE.patch
@@ -0,0 +1,44 @@
+From 6e7cd9c0abffea55e39a4160949bc6fba972d161 Mon Sep 17 00:00:00 2001
+From: Christian Marangi <ansuelsmth@gmail.com>
+Date: Thu, 19 Jan 2023 13:37:46 +0100
+Subject: [PATCH] net/flow_offload: use NL_SET_ERR_MSG instead of
+ NL_SET_ERR_MSG_MOD
+
+Use NL_SET_ERR_MSG instead of NL_SET_ERR_MSG_MOD for bpf modules as
+kernel modules are not supported.
+
+Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
+---
+ include/net/flow_offload.h | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
+index 7a2b022..f17c485 100644
+--- a/include/net/flow_offload.h
++++ b/include/net/flow_offload.h
+@@ -321,7 +321,7 @@ flow_action_mixed_hw_stats_check(const struct flow_action *action,
+ 
+ 	flow_action_for_each(i, action_entry, action) {
+ 		if (i && action_entry->hw_stats != last_hw_stats) {
+-			NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
++			NL_SET_ERR_MSG(extack, "Mixing HW stats types for actions is not supported");
+ 			return false;
+ 		}
+ 		last_hw_stats = action_entry->hw_stats;
+@@ -356,11 +356,11 @@ __flow_action_hw_stats_check(const struct flow_action *action,
+ 
+ 	if (!check_allow_bit &&
+ 	    ~action_entry->hw_stats & FLOW_ACTION_HW_STATS_ANY) {
+-		NL_SET_ERR_MSG_MOD(extack, "Driver supports only default HW stats type \"any\"");
++		NL_SET_ERR_MSG(extack, "Driver supports only default HW stats type \"any\"");
+ 		return false;
+ 	} else if (check_allow_bit &&
+ 		   !(action_entry->hw_stats & BIT(allow_bit))) {
+-		NL_SET_ERR_MSG_MOD(extack, "Driver does not support selected HW stats type");
++		NL_SET_ERR_MSG(extack, "Driver does not support selected HW stats type");
+ 		return false;
+ 	}
+ 	return true;
+-- 
+2.38.1
+