net: af_key: use seq_hlist_foo() helpers

Simplify seq_file code.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/key/af_key.c b/net/key/af_key.c
index 41dd2cb..79d2c0f 100644 (file)
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -3654,9 +3654,8 @@ static const struct net_proto_family pfkey_family_ops = {
 #ifdef CONFIG_PROC_FS
 static int pfkey_seq_show(struct seq_file *f, void *v)
 {
-       struct sock *s;
+       struct sock *s = sk_entry(v);
 
-       s = (struct sock *)v;
        if (v == SEQ_START_TOKEN)
                seq_printf(f ,"sk       RefCnt Rmem   Wmem   User   Inode\n");
        else
@@ -3675,19 +3674,9 @@ static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
 {
        struct net *net = seq_file_net(f);
        struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
-       struct sock *s;
-       struct hlist_node *node;
-       loff_t pos = *ppos;
 
        read_lock(&pfkey_table_lock);
-       if (pos == 0)
-               return SEQ_START_TOKEN;
-
-       sk_for_each(s, node, &net_pfkey->table)
-               if (pos-- == 1)
-                       return s;
-
-       return NULL;
+       return seq_hlist_start_head(&net_pfkey->table, *ppos);
 }
 
 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
@@ -3695,10 +3684,7 @@ static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
        struct net *net = seq_file_net(f);
        struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 
-       ++*ppos;
-       return (v == SEQ_START_TOKEN) ?
-               sk_head(&net_pfkey->table) :
-                       sk_next((struct sock *)v);
+       return seq_hlist_next(v, &net_pfkey->table, ppos);
 }
 
 static void pfkey_seq_stop(struct seq_file *f, void *v)