net: skbuff: hide wifi_acked when CONFIG_WIRELESS not set

Datacenter kernel builds will very likely not include WIRELESS,
so let them shave 2 bits off the skb by hiding the wifi fields.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index a823ec3..513f03b 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -953,8 +953,10 @@ struct sk_buff {
 
        __u8                    l4_hash:1;
        __u8                    sw_hash:1;
+#ifdef CONFIG_WIRELESS
        __u8                    wifi_acked_valid:1;
        __u8                    wifi_acked:1;
+#endif
        __u8                    no_fcs:1;
        /* Indicates the inner headers are valid in the skbuff. */
        __u8                    encapsulation:1;
@@ -1187,6 +1189,15 @@ static inline unsigned int skb_napi_id(const struct sk_buff *skb)
 #endif
 }
 
+static inline bool skb_wifi_acked_valid(const struct sk_buff *skb)
+{
+#ifdef CONFIG_WIRELESS
+       return skb->wifi_acked_valid;
+#else
+       return 0;
+#endif
+}
+
 /**
  * skb_unref - decrement the skb's reference count
  * @skb: buffer

diff --git a/include/net/sock.h b/include/net/sock.h
index 5edf003..8b7ed71 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2697,7 +2697,7 @@ sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
        else
                sock_write_timestamp(sk, kt);
 
-       if (sock_flag(sk, SOCK_WIFI_STATUS) && skb->wifi_acked_valid)
+       if (sock_flag(sk, SOCK_WIFI_STATUS) && skb_wifi_acked_valid(skb))
                __sock_recv_wifi_status(msg, sk, skb);
 }
 

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index ef81452..768f9d0 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -5189,6 +5189,7 @@ void skb_tstamp_tx(struct sk_buff *orig_skb,
 }
 EXPORT_SYMBOL_GPL(skb_tstamp_tx);
 
+#ifdef CONFIG_WIRELESS
 void skb_complete_wifi_ack(struct sk_buff *skb, bool acked)
 {
        struct sock *sk = skb->sk;
@@ -5214,6 +5215,7 @@ void skb_complete_wifi_ack(struct sk_buff *skb, bool acked)
                kfree_skb(skb);
 }
 EXPORT_SYMBOL_GPL(skb_complete_wifi_ack);
+#endif /* CONFIG_WIRELESS */
 
 /**
  * skb_partial_csum_set - set up and verify partial csum values for packet

diff --git a/net/socket.c b/net/socket.c
index 73e493d..a7b4b37 100644 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -957,6 +957,7 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
 }
 EXPORT_SYMBOL_GPL(__sock_recv_timestamp);
 
+#ifdef CONFIG_WIRELESS
 void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,
        struct sk_buff *skb)
 {
@@ -972,6 +973,7 @@ void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,
        put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack);
 }
 EXPORT_SYMBOL_GPL(__sock_recv_wifi_status);
+#endif
 
 static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk,
                                   struct sk_buff *skb)