Merge branch 'mlx5-ipsec-fixes'

Leon Romanovsky says:

====================
Fixes to mlx5 IPsec implementation

This small patchset includes various fixes and one refactoring patch
which I collected for the features sent in this cycle, with one exception -
first patch.

First patch fixes code which was introduced in previous cycle, however I
was able to trigger FW error only in custom debug code, so don't see a
need to send it to net-rc.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Author: davem330

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c

@@ -252,6 +252,8 @@ static void mlx5e_ipsec_init_macs(struct mlx5e_ipsec_sa_entry *sa_entry,
 	struct net_device *netdev;
 	struct neighbour *n;
 	u8 addr[ETH_ALEN];
+	const void *pkey;
+	u8 *dst, *src;
 
 	if (attrs->mode != XFRM_MODE_TUNNEL ||
 	    attrs->type != XFRM_DEV_OFFLOAD_PACKET)
@@ -262,36 +264,31 @@ static void mlx5e_ipsec_init_macs(struct mlx5e_ipsec_sa_entry *sa_entry,
 	mlx5_query_mac_address(mdev, addr);
 	switch (attrs->dir) {
 	case XFRM_DEV_OFFLOAD_IN:
-		ether_addr_copy(attrs->dmac, addr);
-		n = neigh_lookup(&arp_tbl, &attrs->saddr.a4, netdev);
-		if (!n) {
-			n = neigh_create(&arp_tbl, &attrs->saddr.a4, netdev);
-			if (IS_ERR(n))
-				return;
-			neigh_event_send(n, NULL);
-			attrs->drop = true;
-			break;
-		}
-		neigh_ha_snapshot(addr, n, netdev);
-		ether_addr_copy(attrs->smac, addr);
+		src = attrs->dmac;
+		dst = attrs->smac;
+		pkey = &attrs->saddr.a4;
 		break;
 	case XFRM_DEV_OFFLOAD_OUT:
-		ether_addr_copy(attrs->smac, addr);
-		n = neigh_lookup(&arp_tbl, &attrs->daddr.a4, netdev);
-		if (!n) {
-			n = neigh_create(&arp_tbl, &attrs->daddr.a4, netdev);
-			if (IS_ERR(n))
-				return;
-			neigh_event_send(n, NULL);
-			attrs->drop = true;
-			break;
-		}
-		neigh_ha_snapshot(addr, n, netdev);
-		ether_addr_copy(attrs->dmac, addr);
+		src = attrs->smac;
+		dst = attrs->dmac;
+		pkey = &attrs->daddr.a4;
 		break;
 	default:
 		return;
 	}
+
+	ether_addr_copy(src, addr);
+	n = neigh_lookup(&arp_tbl, pkey, netdev);
+	if (!n) {
+		n = neigh_create(&arp_tbl, pkey, netdev);
+		if (IS_ERR(n))
+			return;
+		neigh_event_send(n, NULL);
+		attrs->drop = true;
+	} else {
+		neigh_ha_snapshot(addr, n, netdev);
+		ether_addr_copy(dst, addr);
+	}
 	neigh_release(n);
 }
 
@@ -708,11 +705,12 @@ static int mlx5e_xfrm_add_state(struct xfrm_state *x,
 release_dwork:
 	kfree(sa_entry->dwork);
 release_work:
-	kfree(sa_entry->work->data);
+	if (sa_entry->work)
+		kfree(sa_entry->work->data);
 	kfree(sa_entry->work);
 err_xfrm:
 	kfree(sa_entry);
-	NL_SET_ERR_MSG_MOD(extack, "Device failed to offload this policy");
+	NL_SET_ERR_MSG_WEAK_MOD(extack, "Device failed to offload this state");
 	return err;
 }
 
@@ -752,7 +750,8 @@ static void mlx5e_xfrm_free_state(struct xfrm_state *x)
 	mlx5e_accel_ipsec_fs_del_rule(sa_entry);
 	mlx5_ipsec_free_sa_ctx(sa_entry);
 	kfree(sa_entry->dwork);
-	kfree(sa_entry->work->data);
+	if (sa_entry->work)
+		kfree(sa_entry->work->data);
 	kfree(sa_entry->work);
 sa_entry_free:
 	kfree(sa_entry);

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h

@@ -287,7 +287,7 @@ static inline bool addr6_all_zero(__be32 *addr6)
 {
 	static const __be32 zaddr6[4] = {};
 
-	return !memcmp(addr6, zaddr6, sizeof(*zaddr6));
+	return !memcmp(addr6, zaddr6, sizeof(zaddr6));
 }
 #else
 static inline void mlx5e_ipsec_init(struct mlx5e_priv *priv)

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c

@@ -1252,16 +1252,16 @@ static int tx_add_policy(struct mlx5e_ipsec_pol_entry *pol_entry)
 	setup_fte_no_frags(spec);
 	setup_fte_upper_proto_match(spec, &attrs->upspec);
 
-	if (attrs->reqid) {
+	switch (attrs->action) {
+	case XFRM_POLICY_ALLOW:
+		flow_act.action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
+		if (!attrs->reqid)
+			break;
+
 		err = setup_modify_header(mdev, attrs->reqid,
 					  XFRM_DEV_OFFLOAD_OUT, &flow_act);
 		if (err)
 			goto err_mod_header;
-	}
-
-	switch (attrs->action) {
-	case XFRM_POLICY_ALLOW:
-		flow_act.action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
 		break;
 	case XFRM_POLICY_BLOCK:
 		flow_act.action |= MLX5_FLOW_CONTEXT_ACTION_DROP |
@@ -1273,7 +1273,7 @@ static int tx_add_policy(struct mlx5e_ipsec_pol_entry *pol_entry)
 	default:
 		WARN_ON(true);
 		err = -EINVAL;
-		goto err_action;
+		goto err_mod_header;
 	}
 
 	flow_act.flags |= FLOW_ACT_NO_APPEND;
@@ -1293,7 +1293,7 @@ static int tx_add_policy(struct mlx5e_ipsec_pol_entry *pol_entry)
 	return 0;
 
 err_action:
-	if (attrs->reqid)
+	if (flow_act.modify_hdr)
 		mlx5_modify_header_dealloc(mdev, flow_act.modify_hdr);
 err_mod_header:
 	kvfree(spec);