netdev - [PATCH net 11/16] ionic: Prevent filter add/del err msgs when the device is not available

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220124185312.72646-12-snelson@pensando.io>
Date:   Mon, 24 Jan 2022 10:53:07 -0800
From:   Shannon Nelson <snelson@...sando.io>
To:     davem@...emloft.net, netdev@...r.kernel.org, kuba@...nel.org
Cc:     drivers@...sando.io, Brett Creeley <brett@...sando.io>,
        Shannon Nelson <snelson@...sando.io>
Subject: [PATCH net 11/16] ionic: Prevent filter add/del err msgs when the device is not available

From: Brett Creeley <brett@...sando.io>

Currently when a request for add/deleting a filter is made when
ionic_heartbeat_check() returns failure the driver will be overly
verbose about failures, especially when these are usually temporary
fails and the request will be retried later. An example of this is
a filter add when the FW is in the middle of resetting:

IONIC_CMD_RX_FILTER_ADD (31) failed: IONIC_RC_ERROR (-6)
rx_filter add failed: ADDR 01:80:c2:00:00:0e

Fix this by checking for -ENXIO and other error values on filter
request fails before printing the error message.  Add similar
checking to the delete filter code.

Fixes: f91958cc9622 ("ionic: tame the filter no space message")
Signed-off-by: Brett Creeley <brett@...sando.io>
Signed-off-by: Shannon Nelson <snelson@...sando.io>
---
 .../ethernet/pensando/ionic/ionic_rx_filter.c | 37 ++++++++++++++++---
 1 file changed, 32 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c b/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c
index f6e785f949f9..b7363376dfc8 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c
@@ -376,10 +376,24 @@ static int ionic_lif_filter_add(struct ionic_lif *lif,
 
 		spin_unlock_bh(&lif->rx_filters.lock);
 
-		if (err == -ENOSPC) {
-			if (le16_to_cpu(ctx.cmd.rx_filter_add.match) == IONIC_RX_FILTER_MATCH_VLAN)
-				lif->max_vlans = lif->nvlans;
+		/* store the max_vlans limit that we found */
+		if (err == -ENOSPC &&
+		    le16_to_cpu(ctx.cmd.rx_filter_add.match) == IONIC_RX_FILTER_MATCH_VLAN)
+			lif->max_vlans = lif->nvlans;
+
+		/* Prevent unnecessary error messages on recoverable
+		 * errors as the filter will get retried on the next
+		 * sync attempt.
+		 */
+		switch (err) {
+		case -ENOSPC:
+		case -ENXIO:
+		case -ETIMEDOUT:
+		case -EAGAIN:
+		case -EBUSY:
 			return 0;
+		default:
+			break;
 		}
 
 		ionic_adminq_netdev_err_print(lif, ctx.cmd.cmd.opcode,
@@ -494,9 +508,22 @@ static int ionic_lif_filter_del(struct ionic_lif *lif,
 	spin_unlock_bh(&lif->rx_filters.lock);
 
 	if (state != IONIC_FILTER_STATE_NEW) {
-		err = ionic_adminq_post_wait(lif, &ctx);
-		if (err && err != -EEXIST)
+		err = ionic_adminq_post_wait_nomsg(lif, &ctx);
+
+		switch (err) {
+			/* ignore these errors */
+		case -EEXIST:
+		case -ENXIO:
+		case -ETIMEDOUT:
+		case -EAGAIN:
+		case -EBUSY:
+		case 0:
+			break;
+		default:
+			ionic_adminq_netdev_err_print(lif, ctx.cmd.cmd.opcode,
+						      ctx.comp.comp.status, err);
 			return err;
+		}
 	}
 
 	return 0;
-- 
2.17.1