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Date:   Fri, 7 Oct 2022 14:25:13 +0100
From:   <ecree@...inx.com>
To:     <netdev@...r.kernel.org>, <linux-net-drivers@....com>
CC:     <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <edumazet@...gle.com>, <habetsm.xilinx@...il.com>,
        <johannes@...solutions.net>, <marcelo.leitner@...il.com>,
        Edward Cree <ecree.xilinx@...il.com>
Subject: [RFC PATCH net-next 2/3] sfc: use formatted extacks instead of efx_tc_err()

From: Edward Cree <ecree.xilinx@...il.com>

Since we can now get a formatted message back to the user with
 NL_SET_ERR_MSG_FMT_MOD(), there's no need for our special logging.

Signed-off-by: Edward Cree <ecree.xilinx@...il.com>
---
 drivers/net/ethernet/sfc/mae.c |  5 ++--
 drivers/net/ethernet/sfc/tc.c  | 47 +++++++++++++++-------------------
 drivers/net/ethernet/sfc/tc.h  | 18 -------------
 3 files changed, 23 insertions(+), 47 deletions(-)

diff --git a/drivers/net/ethernet/sfc/mae.c b/drivers/net/ethernet/sfc/mae.c
index 874c765b2465..6f472ea0638a 100644
--- a/drivers/net/ethernet/sfc/mae.c
+++ b/drivers/net/ethernet/sfc/mae.c
@@ -265,9 +265,8 @@ int efx_mae_match_check_caps(struct efx_nic *efx,
 	rc = efx_mae_match_check_cap_typ(supported_fields[MAE_FIELD_INGRESS_PORT],
 					 ingress_port_mask_type);
 	if (rc) {
-		efx_tc_err(efx, "No support for %s mask in field ingress_port\n",
-			   mask_type_name(ingress_port_mask_type));
-		NL_SET_ERR_MSG_MOD(extack, "Unsupported mask type for ingress_port");
+		NL_SET_ERR_MSG_FMT_MOD(extack, "No support for %s mask in field ingress_port",
+				       mask_type_name(ingress_port_mask_type));
 		return rc;
 	}
 	return 0;
diff --git a/drivers/net/ethernet/sfc/tc.c b/drivers/net/ethernet/sfc/tc.c
index 3478860d4023..b21a961eabb1 100644
--- a/drivers/net/ethernet/sfc/tc.c
+++ b/drivers/net/ethernet/sfc/tc.c
@@ -137,17 +137,16 @@ static int efx_tc_flower_parse_match(struct efx_nic *efx,
 		flow_rule_match_control(rule, &fm);
 
 		if (fm.mask->flags) {
-			efx_tc_err(efx, "Unsupported match on control.flags %#x\n",
-				   fm.mask->flags);
-			NL_SET_ERR_MSG_MOD(extack, "Unsupported match on control.flags");
+			NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported match on control.flags %#x",
+					       fm.mask->flags);
 			return -EOPNOTSUPP;
 		}
 	}
 	if (dissector->used_keys &
 	    ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
 	      BIT(FLOW_DISSECTOR_KEY_BASIC))) {
-		efx_tc_err(efx, "Unsupported flower keys %#x\n", dissector->used_keys);
-		NL_SET_ERR_MSG_MOD(extack, "Unsupported flower keys encountered");
+		NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported flower keys %#x",
+				       dissector->used_keys);
 		return -EOPNOTSUPP;
 	}
 
@@ -156,11 +155,11 @@ static int efx_tc_flower_parse_match(struct efx_nic *efx,
 
 		flow_rule_match_basic(rule, &fm);
 		if (fm.mask->n_proto) {
-			EFX_TC_ERR_MSG(efx, extack, "Unsupported eth_proto match\n");
+			NL_SET_ERR_MSG_MOD(extack, "Unsupported eth_proto match");
 			return -EOPNOTSUPP;
 		}
 		if (fm.mask->ip_proto) {
-			EFX_TC_ERR_MSG(efx, extack, "Unsupported ip_proto match\n");
+			NL_SET_ERR_MSG_MOD(extack, "Unsupported ip_proto match");
 			return -EOPNOTSUPP;
 		}
 	}
@@ -200,13 +199,9 @@ static int efx_tc_flower_replace(struct efx_nic *efx,
 
 	if (efv != from_efv) {
 		/* can't happen */
-		efx_tc_err(efx, "for %s efv is %snull but from_efv is %snull\n",
-			   netdev_name(net_dev), efv ? "non-" : "",
-			   from_efv ? "non-" : "");
-		if (efv)
-			NL_SET_ERR_MSG_MOD(extack, "vfrep filter has PF net_dev (can't happen)");
-		else
-			NL_SET_ERR_MSG_MOD(extack, "PF filter has vfrep net_dev (can't happen)");
+		NL_SET_ERR_MSG_FMT_MOD(extack, "for %s efv is %snull but from_efv is %snull (can't happen)",
+				       netdev_name(net_dev), efv ? "non-" : "",
+				       from_efv ? "non-" : "");
 		return -EINVAL;
 	}
 
@@ -214,7 +209,7 @@ static int efx_tc_flower_replace(struct efx_nic *efx,
 	memset(&match, 0, sizeof(match));
 	rc = efx_tc_flower_external_mport(efx, from_efv);
 	if (rc < 0) {
-		EFX_TC_ERR_MSG(efx, extack, "Failed to identify ingress m-port");
+		NL_SET_ERR_MSG_MOD(extack, "Failed to identify ingress m-port");
 		return rc;
 	}
 	match.value.ingress_port = rc;
@@ -224,7 +219,7 @@ static int efx_tc_flower_replace(struct efx_nic *efx,
 		return rc;
 
 	if (tc->common.chain_index) {
-		EFX_TC_ERR_MSG(efx, extack, "No support for nonzero chain_index");
+		NL_SET_ERR_MSG_MOD(extack, "No support for nonzero chain_index");
 		return -EOPNOTSUPP;
 	}
 	match.mask.recirc_id = 0xff;
@@ -261,7 +256,7 @@ static int efx_tc_flower_replace(struct efx_nic *efx,
 
 		if (!act) {
 			/* more actions after a non-pipe action */
-			EFX_TC_ERR_MSG(efx, extack, "Action follows non-pipe action");
+			NL_SET_ERR_MSG_MOD(extack, "Action follows non-pipe action");
 			rc = -EINVAL;
 			goto release;
 		}
@@ -270,7 +265,7 @@ static int efx_tc_flower_replace(struct efx_nic *efx,
 		case FLOW_ACTION_DROP:
 			rc = efx_mae_alloc_action_set(efx, act);
 			if (rc) {
-				EFX_TC_ERR_MSG(efx, extack, "Failed to write action set to hw (drop)");
+				NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (drop)");
 				goto release;
 			}
 			list_add_tail(&act->list, &rule->acts.list);
@@ -281,20 +276,20 @@ static int efx_tc_flower_replace(struct efx_nic *efx,
 			save = *act;
 			to_efv = efx_tc_flower_lookup_efv(efx, fa->dev);
 			if (IS_ERR(to_efv)) {
-				EFX_TC_ERR_MSG(efx, extack, "Mirred egress device not on switch");
+				NL_SET_ERR_MSG_MOD(extack, "Mirred egress device not on switch");
 				rc = PTR_ERR(to_efv);
 				goto release;
 			}
 			rc = efx_tc_flower_external_mport(efx, to_efv);
 			if (rc < 0) {
-				EFX_TC_ERR_MSG(efx, extack, "Failed to identify egress m-port");
+				NL_SET_ERR_MSG_MOD(extack, "Failed to identify egress m-port");
 				goto release;
 			}
 			act->dest_mport = rc;
 			act->deliver = 1;
 			rc = efx_mae_alloc_action_set(efx, act);
 			if (rc) {
-				EFX_TC_ERR_MSG(efx, extack, "Failed to write action set to hw (mirred)");
+				NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (mirred)");
 				goto release;
 			}
 			list_add_tail(&act->list, &rule->acts.list);
@@ -310,9 +305,9 @@ static int efx_tc_flower_replace(struct efx_nic *efx,
 			*act = save;
 			break;
 		default:
-			efx_tc_err(efx, "Unhandled action %u\n", fa->id);
+			NL_SET_ERR_MSG_FMT_MOD(extack, "Unhandled action %u",
+					       fa->id);
 			rc = -EOPNOTSUPP;
-			NL_SET_ERR_MSG_MOD(extack, "Unsupported action");
 			goto release;
 		}
 	}
@@ -334,7 +329,7 @@ static int efx_tc_flower_replace(struct efx_nic *efx,
 		act->deliver = 1;
 		rc = efx_mae_alloc_action_set(efx, act);
 		if (rc) {
-			EFX_TC_ERR_MSG(efx, extack, "Failed to write action set to hw (deliver)");
+			NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (deliver)");
 			goto release;
 		}
 		list_add_tail(&act->list, &rule->acts.list);
@@ -349,13 +344,13 @@ static int efx_tc_flower_replace(struct efx_nic *efx,
 
 	rc = efx_mae_alloc_action_set_list(efx, &rule->acts);
 	if (rc) {
-		EFX_TC_ERR_MSG(efx, extack, "Failed to write action set list to hw");
+		NL_SET_ERR_MSG_MOD(extack, "Failed to write action set list to hw");
 		goto release;
 	}
 	rc = efx_mae_insert_rule(efx, &rule->match, EFX_TC_PRIO_TC,
 				 rule->acts.fw_id, &rule->fw_id);
 	if (rc) {
-		EFX_TC_ERR_MSG(efx, extack, "Failed to insert rule in hw");
+		NL_SET_ERR_MSG_MOD(extack, "Failed to insert rule in hw");
 		goto release_acts;
 	}
 	return 0;
diff --git a/drivers/net/ethernet/sfc/tc.h b/drivers/net/ethernet/sfc/tc.h
index 196fd74ed973..4373c3243e3c 100644
--- a/drivers/net/ethernet/sfc/tc.h
+++ b/drivers/net/ethernet/sfc/tc.h
@@ -15,24 +15,6 @@
 #include <linux/rhashtable.h>
 #include "net_driver.h"
 
-/* Error reporting: convenience macros.  For indicating why a given filter
- * insertion is not supported; errors in internal operation or in the
- * hardware should be netif_err()s instead.
- */
-/* Used when error message is constant. */
-#define EFX_TC_ERR_MSG(efx, extack, message)	do {			\
-	NL_SET_ERR_MSG_MOD(extack, message);				\
-	if (efx->log_tc_errs)						\
-		netif_info(efx, drv, efx->net_dev, "%s\n", message);	\
-} while (0)
-/* Used when error message is not constant; caller should also supply a
- * constant extack message with NL_SET_ERR_MSG_MOD().
- */
-#define efx_tc_err(efx, fmt, args...)	do {		\
-if (efx->log_tc_errs)					\
-	netif_info(efx, drv, efx->net_dev, fmt, ##args);\
-} while (0)
-
 struct efx_tc_action_set {
 	u16 deliver:1;
 	u32 dest_mport;

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