net/mlx5e: Fill IPsec state validation failure reason

Rely on extack to return failure reason.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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

@@ -162,91 +162,87 @@ void mlx5e_ipsec_build_accel_xfrm_attrs(struct mlx5e_ipsec_sa_entry *sa_entry,
 	mlx5e_ipsec_init_limits(sa_entry, attrs);
 }
 
-static inline int mlx5e_xfrm_validate_state(struct xfrm_state *x)
+static int mlx5e_xfrm_validate_state(struct mlx5_core_dev *mdev,
+				     struct xfrm_state *x,
+				     struct netlink_ext_ack *extack)
 {
-	struct net_device *netdev = x->xso.real_dev;
-	struct mlx5e_priv *priv;
-
-	priv = netdev_priv(netdev);
-
 	if (x->props.aalgo != SADB_AALG_NONE) {
-		netdev_info(netdev, "Cannot offload authenticated xfrm states\n");
+		NL_SET_ERR_MSG_MOD(extack, "Cannot offload authenticated xfrm states");
 		return -EINVAL;
 	}
 	if (x->props.ealgo != SADB_X_EALG_AES_GCM_ICV16) {
-		netdev_info(netdev, "Only AES-GCM-ICV16 xfrm state may be offloaded\n");
+		NL_SET_ERR_MSG_MOD(extack, "Only AES-GCM-ICV16 xfrm state may be offloaded");
 		return -EINVAL;
 	}
 	if (x->props.calgo != SADB_X_CALG_NONE) {
-		netdev_info(netdev, "Cannot offload compressed xfrm states\n");
+		NL_SET_ERR_MSG_MOD(extack, "Cannot offload compressed xfrm states");
 		return -EINVAL;
 	}
 	if (x->props.flags & XFRM_STATE_ESN &&
-	    !(mlx5_ipsec_device_caps(priv->mdev) & MLX5_IPSEC_CAP_ESN)) {
-		netdev_info(netdev, "Cannot offload ESN xfrm states\n");
+	    !(mlx5_ipsec_device_caps(mdev) & MLX5_IPSEC_CAP_ESN)) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot offload ESN xfrm states");
 		return -EINVAL;
 	}
 	if (x->props.family != AF_INET &&
 	    x->props.family != AF_INET6) {
-		netdev_info(netdev, "Only IPv4/6 xfrm states may be offloaded\n");
+		NL_SET_ERR_MSG_MOD(extack, "Only IPv4/6 xfrm states may be offloaded");
 		return -EINVAL;
 	}
 	if (x->id.proto != IPPROTO_ESP) {
-		netdev_info(netdev, "Only ESP xfrm state may be offloaded\n");
+		NL_SET_ERR_MSG_MOD(extack, "Only ESP xfrm state may be offloaded");
 		return -EINVAL;
 	}
 	if (x->encap) {
-		netdev_info(netdev, "Encapsulated xfrm state may not be offloaded\n");
+		NL_SET_ERR_MSG_MOD(extack, "Encapsulated xfrm state may not be offloaded");
 		return -EINVAL;
 	}
 	if (!x->aead) {
-		netdev_info(netdev, "Cannot offload xfrm states without aead\n");
+		NL_SET_ERR_MSG_MOD(extack, "Cannot offload xfrm states without aead");
 		return -EINVAL;
 	}
 	if (x->aead->alg_icv_len != 128) {
-		netdev_info(netdev, "Cannot offload xfrm states with AEAD ICV length other than 128bit\n");
+		NL_SET_ERR_MSG_MOD(extack, "Cannot offload xfrm states with AEAD ICV length other than 128bit");
 		return -EINVAL;
 	}
 	if ((x->aead->alg_key_len != 128 + 32) &&
 	    (x->aead->alg_key_len != 256 + 32)) {
-		netdev_info(netdev, "Cannot offload xfrm states with AEAD key length other than 128/256 bit\n");
+		NL_SET_ERR_MSG_MOD(extack, "Cannot offload xfrm states with AEAD key length other than 128/256 bit");
 		return -EINVAL;
 	}
 	if (x->tfcpad) {
-		netdev_info(netdev, "Cannot offload xfrm states with tfc padding\n");
+		NL_SET_ERR_MSG_MOD(extack, "Cannot offload xfrm states with tfc padding");
 		return -EINVAL;
 	}
 	if (!x->geniv) {
-		netdev_info(netdev, "Cannot offload xfrm states without geniv\n");
+		NL_SET_ERR_MSG_MOD(extack, "Cannot offload xfrm states without geniv");
 		return -EINVAL;
 	}
 	if (strcmp(x->geniv, "seqiv")) {
-		netdev_info(netdev, "Cannot offload xfrm states with geniv other than seqiv\n");
+		NL_SET_ERR_MSG_MOD(extack, "Cannot offload xfrm states with geniv other than seqiv");
 		return -EINVAL;
 	}
 	switch (x->xso.type) {
 	case XFRM_DEV_OFFLOAD_CRYPTO:
-		if (!(mlx5_ipsec_device_caps(priv->mdev) &
-		      MLX5_IPSEC_CAP_CRYPTO)) {
-			netdev_info(netdev, "Crypto offload is not supported\n");
+		if (!(mlx5_ipsec_device_caps(mdev) & MLX5_IPSEC_CAP_CRYPTO)) {
+			NL_SET_ERR_MSG_MOD(extack, "Crypto offload is not supported");
 			return -EINVAL;
 		}
 
 		if (x->props.mode != XFRM_MODE_TRANSPORT &&
 		    x->props.mode != XFRM_MODE_TUNNEL) {
-			netdev_info(netdev, "Only transport and tunnel xfrm states may be offloaded\n");
+			NL_SET_ERR_MSG_MOD(extack, "Only transport and tunnel xfrm states may be offloaded");
 			return -EINVAL;
 		}
 		break;
 	case XFRM_DEV_OFFLOAD_PACKET:
-		if (!(mlx5_ipsec_device_caps(priv->mdev) &
+		if (!(mlx5_ipsec_device_caps(mdev) &
 		      MLX5_IPSEC_CAP_PACKET_OFFLOAD)) {
-			netdev_info(netdev, "Packet offload is not supported\n");
+			NL_SET_ERR_MSG_MOD(extack, "Packet offload is not supported");
 			return -EINVAL;
 		}
 
 		if (x->props.mode != XFRM_MODE_TRANSPORT) {
-			netdev_info(netdev, "Only transport xfrm states may be offloaded in packet mode\n");
+			NL_SET_ERR_MSG_MOD(extack, "Only transport xfrm states may be offloaded in packet mode");
 			return -EINVAL;
 		}
 
@@ -254,35 +250,30 @@ static inline int mlx5e_xfrm_validate_state(struct xfrm_state *x)
 		    x->replay_esn->replay_window != 64 &&
 		    x->replay_esn->replay_window != 128 &&
 		    x->replay_esn->replay_window != 256) {
-			netdev_info(netdev,
-				    "Unsupported replay window size %u\n",
-				    x->replay_esn->replay_window);
+			NL_SET_ERR_MSG_MOD(extack, "Unsupported replay window size");
 			return -EINVAL;
 		}
 
 		if (!x->props.reqid) {
-			netdev_info(netdev, "Cannot offload without reqid\n");
+			NL_SET_ERR_MSG_MOD(extack, "Cannot offload without reqid");
 			return -EINVAL;
 		}
 
 		if (x->lft.hard_byte_limit != XFRM_INF ||
 		    x->lft.soft_byte_limit != XFRM_INF) {
-			netdev_info(netdev,
-				    "Device doesn't support limits in bytes\n");
+			NL_SET_ERR_MSG_MOD(extack, "Device doesn't support limits in bytes");
 			return -EINVAL;
 		}
 
 		if (x->lft.soft_packet_limit >= x->lft.hard_packet_limit &&
 		    x->lft.hard_packet_limit != XFRM_INF) {
 			/* XFRM stack doesn't prevent such configuration :(. */
-			netdev_info(netdev,
-				    "Hard packet limit must be greater than soft one\n");
+			NL_SET_ERR_MSG_MOD(extack, "Hard packet limit must be greater than soft one");
 			return -EINVAL;
 		}
 		break;
 	default:
-		netdev_info(netdev, "Unsupported xfrm offload type %d\n",
-			    x->xso.type);
+		NL_SET_ERR_MSG_MOD(extack, "Unsupported xfrm offload type");
 		return -EINVAL;
 	}
 	return 0;
@@ -312,15 +303,13 @@ static int mlx5e_xfrm_add_state(struct xfrm_state *x,
 		return -EOPNOTSUPP;
 
 	ipsec = priv->ipsec;
-	err = mlx5e_xfrm_validate_state(x);
+	err = mlx5e_xfrm_validate_state(priv->mdev, x, extack);
 	if (err)
 		return err;
 
 	sa_entry = kzalloc(sizeof(*sa_entry), GFP_KERNEL);
-	if (!sa_entry) {
-		err = -ENOMEM;
-		goto out;
-	}
+	if (!sa_entry)
+		return -ENOMEM;
 
 	sa_entry->x = x;
 	sa_entry->ipsec = ipsec;
@@ -361,7 +350,7 @@ static int mlx5e_xfrm_add_state(struct xfrm_state *x,
 	mlx5_ipsec_free_sa_ctx(sa_entry);
 err_xfrm:
 	kfree(sa_entry);
-out:
+	NL_SET_ERR_MSG_MOD(extack, "Device failed to offload this policy");
 	return err;
 }