nfqueue: enable to set skb->priority

This is a follow up of the previous patch that enables to get
skb->priority. It's now posssible to set it also.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Florian Westphal <fw@strlen.de>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nfnetlink_queue.c

@@ -1019,11 +1019,13 @@ static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = {
 	[NFQA_CT]		= { .type = NLA_UNSPEC },
 	[NFQA_EXP]		= { .type = NLA_UNSPEC },
 	[NFQA_VLAN]		= { .type = NLA_NESTED },
+	[NFQA_PRIORITY]		= { .type = NLA_U32 },
 };
 
 static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = {
 	[NFQA_VERDICT_HDR]	= { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
 	[NFQA_MARK]		= { .type = NLA_U32 },
+	[NFQA_PRIORITY]		= { .type = NLA_U32 },
 };
 
 static struct nfqnl_instance *
@@ -1104,6 +1106,9 @@ static int nfqnl_recv_verdict_batch(struct sk_buff *skb,
 		if (nfqa[NFQA_MARK])
 			entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
 
+		if (nfqa[NFQA_PRIORITY])
+			entry->skb->priority = ntohl(nla_get_be32(nfqa[NFQA_PRIORITY]));
+
 		nfqnl_reinject(entry, verdict);
 	}
 	return 0;
@@ -1230,6 +1235,9 @@ static int nfqnl_recv_verdict(struct sk_buff *skb, const struct nfnl_info *info,
 	if (nfqa[NFQA_MARK])
 		entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
 
+	if (nfqa[NFQA_PRIORITY])
+		entry->skb->priority = ntohl(nla_get_be32(nfqa[NFQA_PRIORITY]));
+
 	nfqnl_reinject(entry, verdict);
 	return 0;
 }