Thread (12 messages) 12 messages, 2 authors, 2019-10-30
STALE2430d
Revisions (8)
  1. v1 [diff vs current]
  2. v2 [diff vs current]
  3. v1 current
  4. v2 [diff vs current]
  5. v1 [diff vs current]
  6. v1 [diff vs current]
  7. v2 [diff vs current]
  8. v3 [diff vs current]

[PATCH net 4/9] net: stmmac: selftests: Must remove UC/MC addresses to prevent false positives

From: Jose Abreu <Jose.Abreu@synopsys.com>
Date: 2019-10-29 14:15:24
Also in: linux-arm-kernel, lkml
Subsystem: networking drivers, stmmac ethernet driver, the rest · Maintainers: Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds 

In L2 tests that filter packets by destination MAC address we need to
remove all addresses that are currently in the device so that we don't
get false positives when running the tests.

Fixes: 091810dbded9 ("net: stmmac: Introduce selftests support")
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>

---
Cc: Giuseppe Cavallaro <redacted>
Cc: Alexandre Torgue <redacted>
Cc: Jose Abreu <redacted>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: netdev@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
 .../net/ethernet/stmicro/stmmac/stmmac_selftests.c | 104 +++++++++++++++------
 1 file changed, 76 insertions(+), 28 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
index 0b5db52149bc..bcc902f44318 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
@@ -490,6 +490,8 @@ static int stmmac_test_hfilt(struct stmmac_priv *priv)
 	unsigned char gd_addr[ETH_ALEN] = {0x01, 0xee, 0xdd, 0xcc, 0xbb, 0xaa};
 	unsigned char bd_addr[ETH_ALEN] = {0x01, 0x01, 0x02, 0x03, 0x04, 0x05};
 	struct stmmac_packet_attrs attr = { };
+	struct net_device *dummy_dev;
+	struct netdev_hw_addr *ha;
 	int ret;
 
 	ret = stmmac_filter_check(priv);
@@ -499,9 +501,18 @@ static int stmmac_test_hfilt(struct stmmac_priv *priv)
 	if (netdev_mc_count(priv->dev) >= priv->hw->multicast_filter_bins)
 		return -EOPNOTSUPP;
 
+	dummy_dev = alloc_etherdev(0);
+	if (!dummy_dev)
+		return -ENOMEM;
+
+	/* Remove all MC addresses */
+	netdev_for_each_mc_addr(ha, priv->dev)
+		dev_mc_add(dummy_dev, ha->addr);
+	dev_mc_flush(priv->dev);
+
 	ret = dev_mc_add(priv->dev, gd_addr);
 	if (ret)
-		return ret;
+		goto sync;
 
 	attr.dst = gd_addr;
 
@@ -518,6 +529,11 @@ static int stmmac_test_hfilt(struct stmmac_priv *priv)
 
 cleanup:
 	dev_mc_del(priv->dev, gd_addr);
+sync:
+	/* Restore MC addresses */
+	netdev_for_each_mc_addr(ha, dummy_dev)
+		dev_mc_add(priv->dev, ha->addr);
+	free_netdev(dummy_dev);
 	return ret;
 }
 
@@ -526,14 +542,25 @@ static int stmmac_test_pfilt(struct stmmac_priv *priv)
 	unsigned char gd_addr[ETH_ALEN] = {0x00, 0x01, 0x44, 0x55, 0x66, 0x77};
 	unsigned char bd_addr[ETH_ALEN] = {0x08, 0x00, 0x22, 0x33, 0x44, 0x55};
 	struct stmmac_packet_attrs attr = { };
+	struct net_device *dummy_dev;
+	struct netdev_hw_addr *ha;
 	int ret;
 
 	if (stmmac_filter_check(priv))
 		return -EOPNOTSUPP;
 
+	dummy_dev = alloc_etherdev(0);
+	if (!dummy_dev)
+		return -ENOMEM;
+
+	/* Remove all UC addresses */
+	netdev_for_each_uc_addr(ha, priv->dev)
+		dev_uc_add(dummy_dev, ha->addr);
+	dev_uc_flush(priv->dev);
+
 	ret = dev_uc_add(priv->dev, gd_addr);
 	if (ret)
-		return ret;
+		goto sync;
 
 	attr.dst = gd_addr;
 
@@ -550,28 +577,21 @@ static int stmmac_test_pfilt(struct stmmac_priv *priv)
 
 cleanup:
 	dev_uc_del(priv->dev, gd_addr);
+sync:
+	/* Restore UC addresses */
+	netdev_for_each_uc_addr(ha, dummy_dev)
+		dev_uc_add(priv->dev, ha->addr);
+	free_netdev(dummy_dev);
 	return ret;
 }
 
-static int stmmac_dummy_sync(struct net_device *netdev, const u8 *addr)
-{
-	return 0;
-}
-
-static void stmmac_test_set_rx_mode(struct net_device *netdev)
-{
-	/* As we are in test mode of ethtool we already own the rtnl lock
-	 * so no address will change from user. We can just call the
-	 * ndo_set_rx_mode() callback directly */
-	if (netdev->netdev_ops->ndo_set_rx_mode)
-		netdev->netdev_ops->ndo_set_rx_mode(netdev);
-}
-
 static int stmmac_test_mcfilt(struct stmmac_priv *priv)
 {
 	unsigned char uc_addr[ETH_ALEN] = {0x00, 0x01, 0x44, 0x55, 0x66, 0x77};
 	unsigned char mc_addr[ETH_ALEN] = {0x01, 0x01, 0x44, 0x55, 0x66, 0x77};
 	struct stmmac_packet_attrs attr = { };
+	struct net_device *dummy_dev;
+	struct netdev_hw_addr *ha;
 	int ret;
 
 	if (stmmac_filter_check(priv))
@@ -579,13 +599,21 @@ static int stmmac_test_mcfilt(struct stmmac_priv *priv)
 	if (!priv->hw->multicast_filter_bins)
 		return -EOPNOTSUPP;
 
-	/* Remove all MC addresses */
-	__dev_mc_unsync(priv->dev, NULL);
-	stmmac_test_set_rx_mode(priv->dev);
+	dummy_dev = alloc_etherdev(0);
+	if (!dummy_dev)
+		return -ENOMEM;
+
+	/* Remove all UC and MC addresses */
+	netdev_for_each_uc_addr(ha, priv->dev)
+		dev_uc_add(dummy_dev, ha->addr);
+	netdev_for_each_mc_addr(ha, priv->dev)
+		dev_mc_add(dummy_dev, ha->addr);
+	dev_uc_flush(priv->dev);
+	dev_mc_flush(priv->dev);
 
 	ret = dev_uc_add(priv->dev, uc_addr);
 	if (ret)
-		goto cleanup;
+		goto sync;
 
 	attr.dst = uc_addr;
 
@@ -602,8 +630,13 @@ static int stmmac_test_mcfilt(struct stmmac_priv *priv)
 
 cleanup:
 	dev_uc_del(priv->dev, uc_addr);
-	__dev_mc_sync(priv->dev, stmmac_dummy_sync, NULL);
-	stmmac_test_set_rx_mode(priv->dev);
+sync:
+	/* Restore UC and MC addresses */
+	netdev_for_each_uc_addr(ha, dummy_dev)
+		dev_uc_add(priv->dev, ha->addr);
+	netdev_for_each_mc_addr(ha, dummy_dev)
+		dev_mc_add(priv->dev, ha->addr);
+	free_netdev(dummy_dev);
 	return ret;
 }
 
@@ -612,6 +645,8 @@ static int stmmac_test_ucfilt(struct stmmac_priv *priv)
 	unsigned char uc_addr[ETH_ALEN] = {0x00, 0x01, 0x44, 0x55, 0x66, 0x77};
 	unsigned char mc_addr[ETH_ALEN] = {0x01, 0x01, 0x44, 0x55, 0x66, 0x77};
 	struct stmmac_packet_attrs attr = { };
+	struct net_device *dummy_dev;
+	struct netdev_hw_addr *ha;
 	int ret;
 
 	if (stmmac_filter_check(priv))
@@ -619,13 +654,21 @@ static int stmmac_test_ucfilt(struct stmmac_priv *priv)
 	if (!priv->hw->multicast_filter_bins)
 		return -EOPNOTSUPP;
 
-	/* Remove all UC addresses */
-	__dev_uc_unsync(priv->dev, NULL);
-	stmmac_test_set_rx_mode(priv->dev);
+	dummy_dev = alloc_etherdev(0);
+	if (!dummy_dev)
+		return -ENOMEM;
+
+	/* Remove all UC and MC addresses */
+	netdev_for_each_uc_addr(ha, priv->dev)
+		dev_uc_add(dummy_dev, ha->addr);
+	netdev_for_each_mc_addr(ha, priv->dev)
+		dev_mc_add(dummy_dev, ha->addr);
+	dev_uc_flush(priv->dev);
+	dev_mc_flush(priv->dev);
 
 	ret = dev_mc_add(priv->dev, mc_addr);
 	if (ret)
-		goto cleanup;
+		goto sync;
 
 	attr.dst = mc_addr;
 
@@ -642,8 +685,13 @@ static int stmmac_test_ucfilt(struct stmmac_priv *priv)
 
 cleanup:
 	dev_mc_del(priv->dev, mc_addr);
-	__dev_uc_sync(priv->dev, stmmac_dummy_sync, NULL);
-	stmmac_test_set_rx_mode(priv->dev);
+sync:
+	/* Restore UC and MC addresses */
+	netdev_for_each_uc_addr(ha, dummy_dev)
+		dev_uc_add(priv->dev, ha->addr);
+	netdev_for_each_mc_addr(ha, dummy_dev)
+		dev_mc_add(priv->dev, ha->addr);
+	free_netdev(dummy_dev);
 	return ret;
 }
 
-- 
2.7.4
Other recent patches touching these files
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help