raw: Use helpers for the hlist_nulls variant.

mainline inclusion
from mainline-v6.0-rc1
commit f289c02b
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6ECEK
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f289c02bf41b55fbfccf21d72c4ac44cd4a7a107

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

hlist_nulls_add_head_rcu() and hlist_nulls_for_each_entry() have dedicated
macros for sk.
Signed-off-by: NKuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NZiyang Xuan <william.xuanziyang@huawei.com>
Reviewed-by: NYue Haibing <yuehaibing@huawei.com>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>

net/ipv4/raw.c

@@ -96,7 +96,7 @@ int raw_hash_sk(struct sock *sk)
 	hlist = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)];
 
 	write_lock_bh(&h->lock);
-	hlist_nulls_add_head_rcu(&sk->sk_nulls_node, hlist);
+	__sk_nulls_add_node_rcu(sk, hlist);
 	sock_set_flag(sk, SOCK_RCU_FREE);
 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
 	write_unlock_bh(&h->lock);
@@ -172,7 +172,7 @@ static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash)
 
 	hlist = &raw_v4_hashinfo.ht[hash];
 	rcu_read_lock();
-	hlist_nulls_for_each_entry(sk, hnode, hlist, sk_nulls_node) {
+	sk_nulls_for_each(sk, hnode, hlist) {
 		if (!raw_v4_match(net, sk, iph->protocol,
 				  iph->saddr, iph->daddr, dif, sdif))
 			continue;
@@ -275,7 +275,7 @@ void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
 	hlist = &raw_v4_hashinfo.ht[hash];
 
 	rcu_read_lock();
-	hlist_nulls_for_each_entry(sk, hnode, hlist, sk_nulls_node) {
+	sk_nulls_for_each(sk, hnode, hlist) {
 		iph = (const struct iphdr *)skb->data;
 		if (!raw_v4_match(net, sk, iph->protocol,
 				  iph->saddr, iph->daddr, dif, sdif))
@@ -953,7 +953,7 @@ static struct sock *raw_get_first(struct seq_file *seq, int bucket)
 	for (state->bucket = bucket; state->bucket < RAW_HTABLE_SIZE;
 			++state->bucket) {
 		hlist = &h->ht[state->bucket];
-		hlist_nulls_for_each_entry(sk, hnode, hlist, sk_nulls_node) {
+		sk_nulls_for_each(sk, hnode, hlist) {
 			if (sock_net(sk) == seq_file_net(seq))
 				return sk;
 		}

net/ipv4/raw_diag.c

@@ -68,7 +68,7 @@ static struct sock *raw_sock_get(struct net *net, const struct inet_diag_req_v2
 	rcu_read_lock();
 	for (slot = 0; slot < RAW_HTABLE_SIZE; slot++) {
 		hlist = &hashinfo->ht[slot];
-		hlist_nulls_for_each_entry(sk, hnode, hlist, sk_nulls_node) {
+		sk_nulls_for_each(sk, hnode, hlist) {
 			if (raw_lookup(net, sk, r)) {
 				/*
 				 * Grab it and keep until we fill
@@ -164,7 +164,7 @@ static void raw_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
 		num = 0;
 
 		hlist = &hashinfo->ht[slot];
-		hlist_nulls_for_each_entry(sk, hnode, hlist, sk_nulls_node) {
+		sk_nulls_for_each(sk, hnode, hlist) {
 			struct inet_sock *inet = inet_sk(sk);
 
 			if (!net_eq(sock_net(sk), net))

net/ipv6/raw.c

@@ -155,7 +155,7 @@ static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 	hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 	hlist = &raw_v6_hashinfo.ht[hash];
 	rcu_read_lock();
-	hlist_nulls_for_each_entry(sk, hnode, hlist, sk_nulls_node) {
+	sk_nulls_for_each(sk, hnode, hlist) {
 		int filtered;
 
 		if (!raw_v6_match(net, sk, nexthdr, daddr, saddr,
@@ -342,7 +342,7 @@ void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 	hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 	hlist = &raw_v6_hashinfo.ht[hash];
 	rcu_read_lock();
-	hlist_nulls_for_each_entry(sk, hnode, hlist, sk_nulls_node) {
+	sk_nulls_for_each(sk, hnode, hlist) {
 		/* Note: ipv6_hdr(skb) != skb->data */
 		const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
 		saddr = &ip6h->saddr;