linux-kernel - [PATCH net-next] net: netlink: remove netlink_broadcast

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Date:   Tue,  9 Mar 2021 23:18:34 +0800
From:   menglong8.dong@...il.com
To:     kuba@...nel.org
Cc:     davem@...emloft.net, mkubecek@...e.cz, dsahern@...nel.org,
        zhudi21@...wei.com, johannes.berg@...el.com,
        marcelo.leitner@...il.com, dong.menglong@....com.cn,
        ast@...nel.org, yhs@...com, rdunlap@...radead.org,
        yangyingliang@...wei.com, 0x7f454c46@...il.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH net-next] net: netlink: remove netlink_broadcast_filtered

From: Menglong Dong <dong.menglong@....com.cn>

It seems that 'netlink_broadcast_filtered()' is not used anywhere
besides 'netlink_broadcast()'. In order to reduce function calls,
just remove it.

Signed-off-by: Menglong Dong <dong.menglong@....com.cn>
---
 include/linux/netlink.h  |  4 ----
 net/netlink/af_netlink.c | 22 ++--------------------
 2 files changed, 2 insertions(+), 24 deletions(-)

diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index 0bcf98098c5a..277f33e64bb3 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -160,10 +160,6 @@ 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);
-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),
-			       void *filter_data);
 int netlink_set_err(struct sock *ssk, __u32 portid, __u32 group, int code);
 int netlink_register_notifier(struct notifier_block *nb);
 int netlink_unregister_notifier(struct notifier_block *nb);
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index dd488938447f..b462fdc87e9b 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1405,8 +1405,6 @@ struct netlink_broadcast_data {
 	int delivered;
 	gfp_t allocation;
 	struct sk_buff *skb, *skb2;
-	int (*tx_filter)(struct sock *dsk, struct sk_buff *skb, void *data);
-	void *tx_data;
 };
 
 static void do_one_broadcast(struct sock *sk,
@@ -1460,11 +1458,6 @@ static void do_one_broadcast(struct sock *sk,
 			p->delivery_failure = 1;
 		goto out;
 	}
-	if (p->tx_filter && p->tx_filter(sk, p->skb2, p->tx_data)) {
-		kfree_skb(p->skb2);
-		p->skb2 = NULL;
-		goto out;
-	}
 	if (sk_filter(sk, p->skb2)) {
 		kfree_skb(p->skb2);
 		p->skb2 = NULL;
@@ -1487,10 +1480,8 @@ static void do_one_broadcast(struct sock *sk,
 	sock_put(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),
-	void *filter_data)
+int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 portid,
+		      u32 group, gfp_t allocation)
 {
 	struct net *net = sock_net(ssk);
 	struct netlink_broadcast_data info;
@@ -1509,8 +1500,6 @@ int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb, u32 portid
 	info.allocation = allocation;
 	info.skb = skb;
 	info.skb2 = NULL;
-	info.tx_filter = filter;
-	info.tx_data = filter_data;
 
 	/* While we sleep in clone, do not allow to change socket list */
 
@@ -1536,14 +1525,7 @@ int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb, u32 portid
 	}
 	return -ESRCH;
 }
-EXPORT_SYMBOL(netlink_broadcast_filtered);
 
-int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 portid,
-		      u32 group, gfp_t allocation)
-{
-	return netlink_broadcast_filtered(ssk, skb, portid, group, allocation,
-		NULL, NULL);
-}
 EXPORT_SYMBOL(netlink_broadcast);
 
 struct netlink_set_err_data {
-- 
2.30.1