1 files changed, 91 insertions, 20 deletions

diff --git a/net/ipv6/ila/ila_lwt.c b/net/ipv6/ila/ila_lwt.c
index 696281b4bca2..3d56a2fb6f86 100644
--- a/net/ipv6/ila/ila_lwt.c
+++ b/net/ipv6/ila/ila_lwt.c
@@ -20,6 +20,7 @@ struct ila_lwt {
 	struct ila_params p;
 	struct dst_cache dst_cache;
 	u32 connected : 1;
+	u32 lwt_output : 1;
 };
 
 static inline struct ila_lwt *ila_lwt_lwtunnel(
@@ -45,8 +46,10 @@ static int ila_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 	if (skb->protocol != htons(ETH_P_IPV6))
 		goto drop;
 
-	ila_update_ipv6_locator(skb, ila_params_lwtunnel(orig_dst->lwtstate),
-				true);
+	if (ilwt->lwt_output)
+		ila_update_ipv6_locator(skb,
+					ila_params_lwtunnel(orig_dst->lwtstate),
+					true);
 
 	if (rt->rt6i_flags & (RTF_GATEWAY | RTF_CACHE)) {
 		/* Already have a next hop address in route, no need for
@@ -98,11 +101,15 @@ drop:
 static int ila_input(struct sk_buff *skb)
 {
 	struct dst_entry *dst = skb_dst(skb);
+	struct ila_lwt *ilwt = ila_lwt_lwtunnel(dst->lwtstate);
 
 	if (skb->protocol != htons(ETH_P_IPV6))
 		goto drop;
 
-	ila_update_ipv6_locator(skb, ila_params_lwtunnel(dst->lwtstate), false);
+	if (!ilwt->lwt_output)
+		ila_update_ipv6_locator(skb,
+					ila_params_lwtunnel(dst->lwtstate),
+					false);
 
 	return dst->lwtstate->orig_input(skb);
 
@@ -114,6 +121,8 @@ drop:
 static const struct nla_policy ila_nl_policy[ILA_ATTR_MAX + 1] = {
 	[ILA_ATTR_LOCATOR] = { .type = NLA_U64, },
 	[ILA_ATTR_CSUM_MODE] = { .type = NLA_U8, },
+	[ILA_ATTR_IDENT_TYPE] = { .type = NLA_U8, },
+	[ILA_ATTR_HOOK_TYPE] = { .type = NLA_U8, },
 };
 
 static int ila_build_state(struct nlattr *nla,
@@ -127,33 +136,84 @@ static int ila_build_state(struct nlattr *nla,
 	struct lwtunnel_state *newts;
 	const struct fib6_config *cfg6 = cfg;
 	struct ila_addr *iaddr;
+	u8 ident_type = ILA_ATYPE_USE_FORMAT;
+	u8 hook_type = ILA_HOOK_ROUTE_OUTPUT;
+	u8 csum_mode = ILA_CSUM_NO_ACTION;
+	bool lwt_output = true;
+	u8 eff_ident_type;
 	int ret;
 
 	if (family != AF_INET6)
 		return -EINVAL;
 
-	if (cfg6->fc_dst_len < 8 * sizeof(struct ila_locator) + 3) {
-		/* Need to have full locator and at least type field
-		 * included in destination
-		 */
+	ret = nla_parse_nested(tb, ILA_ATTR_MAX, nla, ila_nl_policy, extack);
+	if (ret < 0)
+		return ret;
+
+	if (!tb[ILA_ATTR_LOCATOR])
 		return -EINVAL;
-	}
 
 	iaddr = (struct ila_addr *)&cfg6->fc_dst;
 
-	if (!ila_addr_is_ila(iaddr) || ila_csum_neutral_set(iaddr->ident)) {
-		/* Don't allow translation for a non-ILA address or checksum
-		 * neutral flag to be set.
+	if (tb[ILA_ATTR_IDENT_TYPE])
+		ident_type = nla_get_u8(tb[ILA_ATTR_IDENT_TYPE]);
+
+	if (ident_type == ILA_ATYPE_USE_FORMAT) {
+		/* Infer identifier type from type field in formatted
+		 * identifier.
 		 */
+
+		if (cfg6->fc_dst_len < 8 * sizeof(struct ila_locator) + 3) {
+			/* Need to have full locator and at least type field
+			 * included in destination
+			 */
+			return -EINVAL;
+		}
+
+		eff_ident_type = iaddr->ident.type;
+	} else {
+		eff_ident_type = ident_type;
+	}
+
+	switch (eff_ident_type) {
+	case ILA_ATYPE_IID:
+		/* Don't allow ILA for IID type */
+		return -EINVAL;
+	case ILA_ATYPE_LUID:
+		break;
+	case ILA_ATYPE_VIRT_V4:
+	case ILA_ATYPE_VIRT_UNI_V6:
+	case ILA_ATYPE_VIRT_MULTI_V6:
+	case ILA_ATYPE_NONLOCAL_ADDR:
+		/* These ILA formats are not supported yet. */
+	default:
 		return -EINVAL;
 	}
 
-	ret = nla_parse_nested(tb, ILA_ATTR_MAX, nla, ila_nl_policy, extack);
-	if (ret < 0)
-		return ret;
+	if (tb[ILA_ATTR_HOOK_TYPE])
+		hook_type = nla_get_u8(tb[ILA_ATTR_HOOK_TYPE]);
+
+	switch (hook_type) {
+	case ILA_HOOK_ROUTE_OUTPUT:
+		lwt_output = true;
+		break;
+	case ILA_HOOK_ROUTE_INPUT:
+		lwt_output = false;
+		break;
+	default:
+		return -EINVAL;
+	}
 
-	if (!tb[ILA_ATTR_LOCATOR])
+	if (tb[ILA_ATTR_CSUM_MODE])
+		csum_mode = nla_get_u8(tb[ILA_ATTR_CSUM_MODE]);
+
+	if (csum_mode == ILA_CSUM_NEUTRAL_MAP &&
+	    ila_csum_neutral_set(iaddr->ident)) {
+		/* Don't allow translation if checksum neutral bit is
+		 * configured and it's set in the SIR address.
+		 */
 		return -EINVAL;
+	}
 
 	newts = lwtunnel_state_alloc(sizeof(*ilwt));
 	if (!newts)
@@ -166,19 +226,18 @@ static int ila_build_state(struct nlattr *nla,
 		return ret;
 	}
 
+	ilwt->lwt_output = !!lwt_output;
+
 	p = ila_params_lwtunnel(newts);
 
+	p->csum_mode = csum_mode;
+	p->ident_type = ident_type;
 	p->locator.v64 = (__force __be64)nla_get_u64(tb[ILA_ATTR_LOCATOR]);
 
 	/* Precompute checksum difference for translation since we
 	 * know both the old locator and the new one.
 	 */
 	p->locator_match = iaddr->loc;
-	p->csum_diff = compute_csum_diff8(
-		(__be32 *)&p->locator_match, (__be32 *)&p->locator);
-
-	if (tb[ILA_ATTR_CSUM_MODE])
-		p->csum_mode = nla_get_u8(tb[ILA_ATTR_CSUM_MODE]);
 
 	ila_init_saved_csum(p);
 
@@ -203,13 +262,23 @@ static int ila_fill_encap_info(struct sk_buff *skb,
 			       struct lwtunnel_state *lwtstate)
 {
 	struct ila_params *p = ila_params_lwtunnel(lwtstate);
+	struct ila_lwt *ilwt = ila_lwt_lwtunnel(lwtstate);
 
 	if (nla_put_u64_64bit(skb, ILA_ATTR_LOCATOR, (__force u64)p->locator.v64,
 			      ILA_ATTR_PAD))
 		goto nla_put_failure;
+
 	if (nla_put_u8(skb, ILA_ATTR_CSUM_MODE, (__force u8)p->csum_mode))
 		goto nla_put_failure;
 
+	if (nla_put_u8(skb, ILA_ATTR_IDENT_TYPE, (__force u8)p->ident_type))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, ILA_ATTR_HOOK_TYPE,
+		       ilwt->lwt_output ? ILA_HOOK_ROUTE_OUTPUT :
+					  ILA_HOOK_ROUTE_INPUT))
+		goto nla_put_failure;
+
 	return 0;
 
 nla_put_failure:
@@ -220,6 +289,8 @@ static int ila_encap_nlsize(struct lwtunnel_state *lwtstate)
 {
 	return nla_total_size_64bit(sizeof(u64)) + /* ILA_ATTR_LOCATOR */
 	       nla_total_size(sizeof(u8)) +        /* ILA_ATTR_CSUM_MODE */
+	       nla_total_size(sizeof(u8)) +        /* ILA_ATTR_IDENT_TYPE */
+	       nla_total_size(sizeof(u8)) +        /* ILA_ATTR_HOOK_TYPE */
 	       0;
 }