Merge branch 'in6addr_any-cleanups'

Kuniyuki Iwashima says:

====================
ipv6: Random cleanup for in6addr_any.

The first patch removes in6addr_any alternatives and the second
removes redundant initialisation of a local variable.

Changes:
  v2: Use ipv6_addr_any() in patch 1. (David Ahern)

  v1: https://lore.kernel.org/netdev/20230322012204.33157-1-kuniyu@amazon.com/
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 10 insertions, 13 deletions

diff --git a/net/6lowpan/iphc.c b/net/6lowpan/iphc.c
index 52fad5dad9f7..e116d308a8df 100644
--- a/net/6lowpan/iphc.c
+++ b/net/6lowpan/iphc.c
@@ -848,7 +848,7 @@ static u8 lowpan_compress_ctx_addr(u8 **hc_ptr, const struct net_device *dev,
 				   const struct lowpan_iphc_ctx *ctx,
 				   const unsigned char *lladdr, bool sam)
 {
-	struct in6_addr tmp = {};
+	struct in6_addr tmp;
 	u8 dam;
 
 	switch (lowpan_dev(dev)->lltype) {
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 646b3e490c71..59adc4e6e9ee 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -27,6 +27,7 @@
 #include <linux/net.h>
 #include <linux/pm_runtime.h>
 #include <net/devlink.h>
+#include <net/ipv6.h>
 #include <net/xdp_sock_drv.h>
 #include <net/flow_offload.h>
 #include <linux/ethtool_netlink.h>
@@ -3127,7 +3128,6 @@ struct ethtool_rx_flow_rule *
 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
 {
 	const struct ethtool_rx_flow_spec *fs = input->fs;
-	static struct in6_addr zero_addr = {};
 	struct ethtool_rx_flow_match *match;
 	struct ethtool_rx_flow_rule *flow;
 	struct flow_action_entry *act;
@@ -3233,20 +3233,20 @@ ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
 
 		v6_spec = &fs->h_u.tcp_ip6_spec;
 		v6_m_spec = &fs->m_u.tcp_ip6_spec;
-		if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
+		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) {
 			memcpy(&match->key.ipv6.src, v6_spec->ip6src,
 			       sizeof(match->key.ipv6.src));
 			memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
 			       sizeof(match->mask.ipv6.src));
 		}
-		if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
+		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
 			memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
 			       sizeof(match->key.ipv6.dst));
 			memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
 			       sizeof(match->mask.ipv6.dst));
 		}
-		if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
-		    memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
+		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) ||
+		    !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
 			match->dissector.used_keys |=
 				BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
 			match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 6edae3886885..e7391bf310a7 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -826,13 +826,11 @@ bool inet_bind2_bucket_match_addr_any(const struct inet_bind2_bucket *tb, const
 				      unsigned short port, int l3mdev, const struct sock *sk)
 {
 #if IS_ENABLED(CONFIG_IPV6)
-	struct in6_addr addr_any = {};
-
 	if (sk->sk_family != tb->family) {
 		if (sk->sk_family == AF_INET)
 			return net_eq(ib2_net(tb), net) && tb->port == port &&
 				tb->l3mdev == l3mdev &&
-				ipv6_addr_equal(&tb->v6_rcv_saddr, &addr_any);
+				ipv6_addr_any(&tb->v6_rcv_saddr);
 
 		return false;
 	}
@@ -840,7 +838,7 @@ bool inet_bind2_bucket_match_addr_any(const struct inet_bind2_bucket *tb, const
 	if (sk->sk_family == AF_INET6)
 		return net_eq(ib2_net(tb), net) && tb->port == port &&
 			tb->l3mdev == l3mdev &&
-			ipv6_addr_equal(&tb->v6_rcv_saddr, &addr_any);
+			ipv6_addr_any(&tb->v6_rcv_saddr);
 	else
 #endif
 		return net_eq(ib2_net(tb), net) && tb->port == port &&
@@ -866,11 +864,10 @@ inet_bhash2_addr_any_hashbucket(const struct sock *sk, const struct net *net, in
 {
 	struct inet_hashinfo *hinfo = tcp_or_dccp_get_hashinfo(sk);
 	u32 hash;
-#if IS_ENABLED(CONFIG_IPV6)
-	struct in6_addr addr_any = {};
 
+#if IS_ENABLED(CONFIG_IPV6)
 	if (sk->sk_family == AF_INET6)
-		hash = ipv6_portaddr_hash(net, &addr_any, port);
+		hash = ipv6_portaddr_hash(net, &in6addr_any, port);
 	else
 #endif
 		hash = ipv4_portaddr_hash(net, 0, port);