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netfilter: nft_meta: move interface kind handling to helper

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checkpatch complains about == NULL checks in original code,
so use !in instead.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2019-12-18 12:05:17 +01:00 committed by Pablo Neira Ayuso
parent b1327fbc29
commit a4150a1faa
1 changed files with 25 additions and 6 deletions
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31
net/netfilter/nft_meta.c
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@ -175,6 +175,30 @@ nft_meta_get_eval_cgroup(u32 *dest, const struct nft_pktinfo *pkt)
}
#endif
static noinline bool nft_meta_get_eval_kind(enum nft_meta_keys key,
u32 *dest,
const struct nft_pktinfo *pkt)
{
const struct net_device *in = nft_in(pkt), *out = nft_out(pkt);
switch (key) {
case NFT_META_IIFKIND:
if (!in || !in->rtnl_link_ops)
return false;
strncpy((char *)dest, in->rtnl_link_ops->kind, IFNAMSIZ);
break;
case NFT_META_OIFKIND:
if (!out || !out->rtnl_link_ops)
return false;
strncpy((char *)dest, out->rtnl_link_ops->kind, IFNAMSIZ);
break;
default:
return false;
}
return true;
}
void nft_meta_get_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
@ -286,14 +310,9 @@ void nft_meta_get_eval(const struct nft_expr *expr,
break;
#endif
case NFT_META_IIFKIND:
if (in == NULL || in->rtnl_link_ops == NULL)
goto err;
strncpy((char *)dest, in->rtnl_link_ops->kind, IFNAMSIZ);
break;
case NFT_META_OIFKIND:
if (out == NULL || out->rtnl_link_ops == NULL)
if (!nft_meta_get_eval_kind(priv->key, dest, pkt))
goto err;
strncpy((char *)dest, out->rtnl_link_ops->kind, IFNAMSIZ);
break;
case NFT_META_TIME_NS:
case NFT_META_TIME_DAY: