netdev - [RFCv7 PATCH net-next 23/36] net: adjust the build check for net_gso

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Date:   Wed, 10 Aug 2022 11:06:11 +0800
From:   Jian Shen <shenjian15@...wei.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <andrew@...n.ch>,
        <ecree.xilinx@...il.com>, <hkallweit1@...il.com>,
        <alexandr.lobakin@...el.com>, <saeed@...nel.org>, <leon@...nel.org>
CC:     <netdev@...r.kernel.org>, <linuxarm@...neuler.org>
Subject: [RFCv7 PATCH net-next 23/36] net: adjust the build check for net_gso_ok()

Introduce macro GSO_INDEX(x) to replace the NETIF_F_XXX
feature shift check, for all the macroes NETIF_F_XXX will
be remove later.

Signed-off-by: Jian Shen <shenjian15@...wei.com>
---
 include/linux/netdevice.h | 40 ++++++++++++++++++++-------------------
 1 file changed, 21 insertions(+), 19 deletions(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 1bd5dcbc884d..b01af2a3838d 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -4886,28 +4886,30 @@ netdev_features_t netif_skb_features(struct sk_buff *skb);
 
 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
 {
+#define GSO_INDEX(x)	((1ULL << (x)) >> NETIF_F_GSO_SHIFT)
+
 	netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
 
 	/* check flags correspondence */
-	BUILD_BUG_ON(SKB_GSO_TCPV4   != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_DODGY   != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_TCPV6   != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_FCOE    != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_GRE     != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_IPXIP4  != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_IPXIP6  != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_SCTP    != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
-	BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT));
+	BUILD_BUG_ON(SKB_GSO_TCPV4   != GSO_INDEX(NETIF_F_TSO_BIT));
+	BUILD_BUG_ON(SKB_GSO_DODGY   != GSO_INDEX(NETIF_F_GSO_ROBUST_BIT));
+	BUILD_BUG_ON(SKB_GSO_TCP_ECN != GSO_INDEX(NETIF_F_TSO_ECN_BIT));
+	BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != GSO_INDEX(NETIF_F_TSO_MANGLEID_BIT));
+	BUILD_BUG_ON(SKB_GSO_TCPV6   != GSO_INDEX(NETIF_F_TSO6_BIT));
+	BUILD_BUG_ON(SKB_GSO_FCOE    != GSO_INDEX(NETIF_F_FSO_BIT));
+	BUILD_BUG_ON(SKB_GSO_GRE     != GSO_INDEX(NETIF_F_GSO_GRE_BIT));
+	BUILD_BUG_ON(SKB_GSO_GRE_CSUM != GSO_INDEX(NETIF_F_GSO_GRE_CSUM_BIT));
+	BUILD_BUG_ON(SKB_GSO_IPXIP4  != GSO_INDEX(NETIF_F_GSO_IPXIP4_BIT));
+	BUILD_BUG_ON(SKB_GSO_IPXIP6  != GSO_INDEX(NETIF_F_GSO_IPXIP6_BIT));
+	BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != GSO_INDEX(NETIF_F_GSO_UDP_TUNNEL_BIT));
+	BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != GSO_INDEX(NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT));
+	BUILD_BUG_ON(SKB_GSO_PARTIAL != GSO_INDEX(NETIF_F_GSO_PARTIAL_BIT));
+	BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != GSO_INDEX(NETIF_F_GSO_TUNNEL_REMCSUM_BIT));
+	BUILD_BUG_ON(SKB_GSO_SCTP    != GSO_INDEX(NETIF_F_GSO_SCTP_BIT));
+	BUILD_BUG_ON(SKB_GSO_ESP != GSO_INDEX(NETIF_F_GSO_ESP_BIT));
+	BUILD_BUG_ON(SKB_GSO_UDP != GSO_INDEX(NETIF_F_GSO_UDP_BIT));
+	BUILD_BUG_ON(SKB_GSO_UDP_L4 != GSO_INDEX(NETIF_F_GSO_UDP_L4_BIT));
+	BUILD_BUG_ON(SKB_GSO_FRAGLIST != GSO_INDEX(NETIF_F_GSO_FRAGLIST_BIT));
 
 	return (features & feature) == feature;
 }
-- 
2.33.0