netdev - [RFC PATCH bpf-next v2 01/17] net: refactor net assignment for seq_net

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Message-ID: <20200415192740.4082720-1-yhs@fb.com>
Date:   Wed, 15 Apr 2020 12:27:40 -0700
From:   Yonghong Song <yhs@...com>
To:     Andrii Nakryiko <andriin@...com>, <bpf@...r.kernel.org>,
        Martin KaFai Lau <kafai@...com>, <netdev@...r.kernel.org>
CC:     Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>, <kernel-team@...com>
Subject: [RFC PATCH bpf-next v2 01/17] net: refactor net assignment for seq_net_private structure

Refactor assignment of "net" in seq_net_private structure
in proc_net.c to a helper function. The helper later will
be used by bpfdump.

Signed-off-by: Yonghong Song <yhs@...com>
---
 fs/proc/proc_net.c           | 5 ++---
 include/linux/seq_file_net.h | 8 ++++++++
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index 4888c5224442..aee07c19cf8b 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -75,9 +75,8 @@ static int seq_open_net(struct inode *inode, struct file *file)
 		put_net(net);
 		return -ENOMEM;
 	}
-#ifdef CONFIG_NET_NS
-	p->net = net;
-#endif
+
+	set_seq_net_private(p, net);
 	return 0;
 }
 
diff --git a/include/linux/seq_file_net.h b/include/linux/seq_file_net.h
index 0fdbe1ddd8d1..0ec4a18b9aca 100644
--- a/include/linux/seq_file_net.h
+++ b/include/linux/seq_file_net.h
@@ -35,4 +35,12 @@ static inline struct net *seq_file_single_net(struct seq_file *seq)
 #endif
 }
 
+static inline void set_seq_net_private(struct seq_net_private *p,
+				       struct net *net)
+{
+#ifdef CONFIG_NET_NS
+	p->net = net;
+#endif
+}
+
 #endif
-- 
2.24.1