netdev - [patch net-next v2 6/9] netlink: introduce typedef for filter function

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Date: Thu, 16 Nov 2023 17:48:18 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org,
	pabeni@...hat.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	jacob.e.keller@...el.com,
	jhs@...atatu.com,
	johannes@...solutions.net,
	andriy.shevchenko@...ux.intel.com,
	amritha.nambiar@...el.com,
	sdf@...gle.com
Subject: [patch net-next v2 6/9] netlink: introduce typedef for filter function

From: Jiri Pirko <jiri@...dia.com>

Make the code using filter function a bit nicer by consolidating the
filter function arguments using typedef.

Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
v1->v2:
- new patch
---
 drivers/connector/connector.c | 5 ++---
 include/linux/connector.h     | 6 ++----
 include/linux/netlink.h       | 6 ++++--
 net/netlink/af_netlink.c      | 6 ++----
 4 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/drivers/connector/connector.c b/drivers/connector/connector.c
index 7f7b94f616a6..4028e8eeba82 100644
--- a/drivers/connector/connector.c
+++ b/drivers/connector/connector.c
@@ -59,9 +59,8 @@ static int cn_already_initialized;
  * both, or if both are zero then the group is looked up and sent there.
  */
 int cn_netlink_send_mult(struct cn_msg *msg, u16 len, u32 portid, u32 __group,
-	gfp_t gfp_mask,
-	int (*filter)(struct sock *dsk, struct sk_buff *skb, void *data),
-	void *filter_data)
+			 gfp_t gfp_mask, netlink_filter_fn filter,
+			 void *filter_data)
 {
 	struct cn_callback_entry *__cbq;
 	unsigned int size;
diff --git a/include/linux/connector.h b/include/linux/connector.h
index cec2d99ae902..cb18d70d623f 100644
--- a/include/linux/connector.h
+++ b/include/linux/connector.h
@@ -98,10 +98,8 @@ void cn_del_callback(const struct cb_id *id);
  *
  * If there are no listeners for given group %-ESRCH can be returned.
  */
-int cn_netlink_send_mult(struct cn_msg *msg, u16 len, u32 portid,
-			 u32 group, gfp_t gfp_mask,
-			 int (*filter)(struct sock *dsk, struct sk_buff *skb,
-				       void *data),
+int cn_netlink_send_mult(struct cn_msg *msg, u16 len, u32 portid, u32 __group,
+			 gfp_t gfp_mask, netlink_filter_fn filter,
 			 void *filter_data);
 
 /**
diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index 75d7de34c908..d30f599a4c6b 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -228,10 +228,12 @@ bool netlink_strict_get_check(struct sk_buff *skb);
 int netlink_unicast(struct sock *ssk, struct sk_buff *skb, __u32 portid, int nonblock);
 int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 portid,
 		      __u32 group, gfp_t allocation);
+
+typedef int (*netlink_filter_fn)(struct sock *dsk, struct sk_buff *skb, void *data);
+
 int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb,
 			       __u32 portid, __u32 group, gfp_t allocation,
-			       int (*filter)(struct sock *dsk,
-					     struct sk_buff *skb, void *data),
+			       netlink_filter_fn filter,
 			       void *filter_data);
 int netlink_set_err(struct sock *ssk, __u32 portid, __u32 group, int code);
 int netlink_register_notifier(struct notifier_block *nb);
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index eb086b06d60d..6bad718c2966 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1518,10 +1518,8 @@ static void do_one_broadcast(struct sock *sk,
 }
 
 int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb,
-			       u32 portid,
-			       u32 group, gfp_t allocation,
-			       int (*filter)(struct sock *dsk,
-					     struct sk_buff *skb, void *data),
+			       __u32 portid, __u32 group, gfp_t allocation,
+			       netlink_filter_fn filter,
 			       void *filter_data)
 {
 	struct net *net = sock_net(ssk);
-- 
2.41.0