From: Nir Dotan <nird@mellanox.com>
Date: Tue, 24 Jul 2018 17:13:12 +0300
Subject: mlxsw: core_acl_flex_actions: Add extack messages
Patch-mainline: v4.19-rc1
Git-commit: 9c10812afe3ad45325145787973bcf863d51b057
References: bsc#1112374

Return extack messages for failures in action set creation.
Errors may occur when action is not currently supported or due
to lack of resources.

Signed-off-by: Nir Dotan <nird@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c |   35 ++++++++----
 1 file changed, 25 insertions(+), 10 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c
@@ -766,8 +766,10 @@ int mlxsw_afa_block_append_vlan_modify(s
 						  MLXSW_AFA_VLAN_CODE,
 						  MLXSW_AFA_VLAN_SIZE);
 
-	if (IS_ERR(act))
+	if (IS_ERR(act)) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot append vlan_modify action");
 		return PTR_ERR(act);
+	}
 	mlxsw_afa_vlan_pack(act, MLXSW_AFA_VLAN_VLAN_TAG_CMD_NOP,
 			    MLXSW_AFA_VLAN_CMD_SET_OUTER, vid,
 			    MLXSW_AFA_VLAN_CMD_SET_OUTER, pcp,
@@ -969,12 +971,15 @@ mlxsw_afa_block_append_mirror(struct mlx
 
 	mirror = mlxsw_afa_mirror_create(block, local_in_port, out_dev,
 					 ingress);
-	if (IS_ERR(mirror))
+	if (IS_ERR(mirror)) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot create mirror action");
 		return PTR_ERR(mirror);
-
+	}
 	err = mlxsw_afa_block_append_allocated_mirror(block, mirror->span_id);
-	if (err)
+	if (err) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot append mirror action");
 		goto err_append_allocated_mirror;
+	}
 
 	return 0;
 
@@ -1032,16 +1037,21 @@ int mlxsw_afa_block_append_fwd(struct ml
 	char *act;
 	int err;
 
-	if (in_port)
+	if (in_port) {
+		NL_SET_ERR_MSG_MOD(extack, "Forwarding to ingress port is not supported");
 		return -EOPNOTSUPP;
+	}
 	fwd_entry_ref = mlxsw_afa_fwd_entry_ref_create(block, local_port);
-	if (IS_ERR(fwd_entry_ref))
+	if (IS_ERR(fwd_entry_ref)) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot create forward action");
 		return PTR_ERR(fwd_entry_ref);
+	}
 	kvdl_index = fwd_entry_ref->fwd_entry->kvdl_index;
 
 	act = mlxsw_afa_block_append_action(block, MLXSW_AFA_FORWARD_CODE,
 					    MLXSW_AFA_FORWARD_SIZE);
 	if (IS_ERR(act)) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot append forward action");
 		err = PTR_ERR(act);
 		goto err_append_action;
 	}
@@ -1114,14 +1124,17 @@ int mlxsw_afa_block_append_counter(struc
 	int err;
 
 	counter = mlxsw_afa_counter_create(block);
-	if (IS_ERR(counter))
+	if (IS_ERR(counter)) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot create count action");
 		return PTR_ERR(counter);
+	}
 	counter_index = counter->counter_index;
 
 	err = mlxsw_afa_block_append_allocated_counter(block, counter_index);
-	if (err)
+	if (err) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot append count action");
 		goto err_append_allocated_counter;
-
+	}
 	if (p_counter_index)
 		*p_counter_index = counter_index;
 	return 0;
@@ -1170,8 +1183,10 @@ int mlxsw_afa_block_append_fid_set(struc
 	char *act = mlxsw_afa_block_append_action(block,
 						  MLXSW_AFA_VIRFWD_CODE,
 						  MLXSW_AFA_VIRFWD_SIZE);
-	if (IS_ERR(act))
+	if (IS_ERR(act)) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot append fid_set action");
 		return PTR_ERR(act);
+	}
 	mlxsw_afa_virfwd_pack(act, MLXSW_AFA_VIRFWD_FID_CMD_SET, fid);
 	return 0;
 }