More recent GCC warns about two kinds of switch statement uses:
1) Switching on an enumeration, but not having an explicit case
statement for all members of the enumeration. To show the
compiler this is intentional, we simply add a default case
with nothing more than a break statement.
2) Switching on a boolean value. I think this warning is dumb
but nevertheless you get it wholesale with -Wswitch.
This patch cures all such warnings in netfilter.
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
diff --git a/net/bridge/netfilter/nft_reject_bridge.c b/net/bridge/netfilter/nft_reject_bridge.c
index 54a2fdf..ae8141f 100644
--- a/net/bridge/netfilter/nft_reject_bridge.c
+++ b/net/bridge/netfilter/nft_reject_bridge.c
@@ -371,6 +371,8 @@ static int nft_reject_bridge_dump(struct sk_buff *skb,
if (nla_put_u8(skb, NFTA_REJECT_ICMP_CODE, priv->icmp_code))
goto nla_put_failure;
break;
+ default:
+ break;
}
return 0;
diff --git a/net/ipv4/netfilter/nft_reject_ipv4.c b/net/ipv4/netfilter/nft_reject_ipv4.c
index 16a5d4d..a7621fa 100644
--- a/net/ipv4/netfilter/nft_reject_ipv4.c
+++ b/net/ipv4/netfilter/nft_reject_ipv4.c
@@ -33,6 +33,8 @@ static void nft_reject_ipv4_eval(const struct nft_expr *expr,
case NFT_REJECT_TCP_RST:
nf_send_reset(pkt->skb, pkt->ops->hooknum);
break;
+ default:
+ break;
}
data[NFT_REG_VERDICT].verdict = NF_DROP;
diff --git a/net/ipv6/netfilter/nft_reject_ipv6.c b/net/ipv6/netfilter/nft_reject_ipv6.c
index f732859..71c7be5 100644
--- a/net/ipv6/netfilter/nft_reject_ipv6.c
+++ b/net/ipv6/netfilter/nft_reject_ipv6.c
@@ -34,6 +34,8 @@ static void nft_reject_ipv6_eval(const struct nft_expr *expr,
case NFT_REJECT_TCP_RST:
nf_send_reset6(net, pkt->skb, pkt->ops->hooknum);
break;
+ default:
+ break;
}
data[NFT_REG_VERDICT].verdict = NF_DROP;
diff --git a/net/netfilter/nft_compat.c b/net/netfilter/nft_compat.c
index 589b848..bdefefe 100644
--- a/net/netfilter/nft_compat.c
+++ b/net/netfilter/nft_compat.c
@@ -321,11 +321,11 @@ static void nft_match_eval(const struct nft_expr *expr,
return;
}
- switch(ret) {
- case true:
+ switch (ret ? 1 : 0) {
+ case 1:
data[NFT_REG_VERDICT].verdict = NFT_CONTINUE;
break;
- case false:
+ case 0:
data[NFT_REG_VERDICT].verdict = NFT_BREAK;
break;
}
diff --git a/net/netfilter/nft_ct.c b/net/netfilter/nft_ct.c
index cc56030..18d520e 100644
--- a/net/netfilter/nft_ct.c
+++ b/net/netfilter/nft_ct.c
@@ -56,6 +56,8 @@ static void nft_ct_get_eval(const struct nft_expr *expr,
state = NF_CT_STATE_BIT(ctinfo);
dest->data[0] = state;
return;
+ default:
+ break;
}
if (ct == NULL)
@@ -117,6 +119,8 @@ static void nft_ct_get_eval(const struct nft_expr *expr,
return;
}
#endif
+ default:
+ break;
}
tuple = &ct->tuplehash[priv->dir].tuple;
@@ -141,6 +145,8 @@ static void nft_ct_get_eval(const struct nft_expr *expr,
case NFT_CT_PROTO_DST:
dest->data[0] = (__force __u16)tuple->dst.u.all;
return;
+ default:
+ break;
}
return;
err:
@@ -172,6 +178,8 @@ static void nft_ct_set_eval(const struct nft_expr *expr,
}
break;
#endif
+ default:
+ break;
}
}
--
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