drivers: hooks: add bonding driver vendor hooks

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4UV43
CVE: NA

---------------------------

Allow vendor modules to attach bonding driver hooks. This
patch introduce vendor_bond_check_dev_link hook.

Usage:

  static void vendor_foo(void *data, const struct bonding *bond,
  		       const struct slave *slave, int *state)
  {
          pr_info("%s\n", __func__);
  }

  static int __init vendor_bond_init(void)
  {
  	return register_trace_vendor_bond_check_dev_link(&vendor_foo, NULL);
  }

  static void __exit vendor_bond_exit(void)
  {
  	unregister_trace_vendor_bond_check_dev_link(&vendor_foo, NULL);
  }

  module_init(vendor_bond_init);
  module_exit(vendor_bond_exit);
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: NXie XiuQi <xiexiuqi@huawei.com>
Reviewed-by: NZhang Jialin <zhangjialin11@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm64/configs/openeuler_defconfig

@@ -6090,6 +6090,7 @@ CONFIG_USB4=m
 # Vendor Hooks
 #
 CONFIG_VENDOR_HOOKS=y
+CONFIG_VENDOR_BOND_HOOKS=y
 # end of Vendor Hooks
 
 CONFIG_LIBNVDIMM=m

arch/x86/configs/openeuler_defconfig

@@ -7183,6 +7183,7 @@ CONFIG_USB4=m
 # Vendor Hooks
 #
 CONFIG_VENDOR_HOOKS=y
+CONFIG_VENDOR_BOND_HOOKS=y
 # end of Vendor Hooks
 
 CONFIG_LIBNVDIMM=m

drivers/hooks/Kconfig

@@ -10,4 +10,14 @@ config VENDOR_HOOKS
           Allow vendor modules to attach to tracepoint "hooks" defined via
           DECLARE_HOOK or DECLARE_RESTRICTED_HOOK.
 
+config VENDOR_BOND_HOOKS
+        bool "Ethernet Bonding driver Vendor Hooks"
+        depends on VENDOR_HOOKS && BONDING
+        default n
+        help
+	  Enable ethernet bonding driver vendor hooks
+
+          Allow vendor modules to attach bonding driver hooks defined via
+          DECLARE_HOOK or DECLARE_RESTRICTED_HOOK.
+
 endmenu

drivers/hooks/vendor_hooks.c

@@ -8,9 +8,13 @@
 
 #define CREATE_TRACE_POINTS
 #include <trace/hooks/vendor_hooks.h>
+#include <trace/hooks/bonding.h>
 
 /*
  * Export tracepoints that act as a bare tracehook (ie: have no trace event
  * associated with them) to allow external modules to probe them.
  */
 
+#ifdef CONFIG_VENDOR_BOND_HOOKS
+EXPORT_TRACEPOINT_SYMBOL_GPL(vendor_bond_check_dev_link);
+#endif

drivers/net/bonding/bond_main.c

@@ -83,6 +83,7 @@
 #include <net/bonding.h>
 #include <net/bond_3ad.h>
 #include <net/bond_alb.h>
+#include <trace/hooks/bonding.h>
 
 #include "bonding_priv.h"
 
@@ -2415,6 +2416,10 @@ static int bond_miimon_inspect(struct bonding *bond)
 
 		link_state = bond_check_dev_link(bond, slave->dev, 0);
 
+#ifdef CONFIG_VENDOR_BOND_HOOKS
+		trace_vendor_bond_check_dev_link(bond, slave, &link_state);
+#endif
+
 		switch (slave->link) {
 		case BOND_LINK_UP:
 			if (link_state)

include/trace/hooks/bonding.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Ethernet Bonding driver Vendor Hooks
+ *
+ * Copyright (c) 2022, Huawei Tech. Co., Ltd.
+ */
+
+#ifdef CONFIG_VENDOR_BOND_HOOKS
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM bonding
+
+#define TRACE_INCLUDE_PATH trace/hooks
+#if !defined(_TRACE_HOOK_BONDING_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_HOOK_BONDING_H
+#include <linux/tracepoint.h>
+#include <trace/hooks/vendor_hooks.h>
+
+struct bonding;
+struct slave;
+DECLARE_HOOK(vendor_bond_check_dev_link,
+	TP_PROTO(const struct bonding *bond, const struct slave *slave, int *state),
+	TP_ARGS(bond, slave, state));
+
+#endif
+/* This part must be outside protection */
+#include <trace/define_trace.h>
+
+#endif