netdev - [PATCH net 3/7] ice: Flush FDB entries before reset

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: <20241008230050.928245-4-anthony.l.nguyen@intel.com>
Date: Tue,  8 Oct 2024 16:00:41 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	netdev@...r.kernel.org
Cc: Wojciech Drewek <wojciech.drewek@...el.com>,
	anthony.l.nguyen@...el.com,
	horms@...nel.org,
	michal.swiatkowski@...ux.intel.com,
	Mateusz Polchlopek <mateusz.polchlopek@...el.com>,
	Sujai Buvaneswaran <sujai.buvaneswaran@...el.com>
Subject: [PATCH net 3/7] ice: Flush FDB entries before reset

From: Wojciech Drewek <wojciech.drewek@...el.com>

Triggering the reset while in switchdev mode causes
errors[1]. Rules are already removed by this time
because switch content is flushed in case of the reset.
This means that rules were deleted from HW but SW
still thinks they exist so when we get
SWITCHDEV_FDB_DEL_TO_DEVICE notification we try to
delete not existing rule.

We can avoid these errors by clearing the rules
early in the reset flow before they are removed from HW.
Switchdev API will get notified that the rule was removed
so we won't get SWITCHDEV_FDB_DEL_TO_DEVICE notification.
Remove unnecessary ice_clear_sw_switch_recipes.

[1]
ice 0000:01:00.0: Failed to delete FDB forward rule, err: -2
ice 0000:01:00.0: Failed to delete FDB guard rule, err: -2

Fixes: 7c945a1a8e5f ("ice: Switchdev FDB events support")
Reviewed-by: Mateusz Polchlopek <mateusz.polchlopek@...el.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 .../net/ethernet/intel/ice/ice_eswitch_br.c   |  5 +++-
 .../net/ethernet/intel/ice/ice_eswitch_br.h   |  1 +
 drivers/net/ethernet/intel/ice/ice_main.c     | 24 +++----------------
 3 files changed, 8 insertions(+), 22 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch_br.c b/drivers/net/ethernet/intel/ice/ice_eswitch_br.c
index f5aceb32bf4d..cccb7ddf61c9 100644
--- a/drivers/net/ethernet/intel/ice/ice_eswitch_br.c
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch_br.c
@@ -582,10 +582,13 @@ ice_eswitch_br_switchdev_event(struct notifier_block *nb,
 	return NOTIFY_DONE;
 }
 
-static void ice_eswitch_br_fdb_flush(struct ice_esw_br *bridge)
+void ice_eswitch_br_fdb_flush(struct ice_esw_br *bridge)
 {
 	struct ice_esw_br_fdb_entry *entry, *tmp;
 
+	if (!bridge)
+		return;
+
 	list_for_each_entry_safe(entry, tmp, &bridge->fdb_list, list)
 		ice_eswitch_br_fdb_entry_notify_and_cleanup(bridge, entry);
 }
diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch_br.h b/drivers/net/ethernet/intel/ice/ice_eswitch_br.h
index c15c7344d7f8..66a2c804338f 100644
--- a/drivers/net/ethernet/intel/ice/ice_eswitch_br.h
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch_br.h
@@ -117,5 +117,6 @@ void
 ice_eswitch_br_offloads_deinit(struct ice_pf *pf);
 int
 ice_eswitch_br_offloads_init(struct ice_pf *pf);
+void ice_eswitch_br_fdb_flush(struct ice_esw_br *bridge);
 
 #endif /* _ICE_ESWITCH_BR_H_ */
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 09d1a4eb5716..b1e7727b8677 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -521,25 +521,6 @@ static void ice_pf_dis_all_vsi(struct ice_pf *pf, bool locked)
 		pf->vf_agg_node[node].num_vsis = 0;
 }
 
-/**
- * ice_clear_sw_switch_recipes - clear switch recipes
- * @pf: board private structure
- *
- * Mark switch recipes as not created in sw structures. There are cases where
- * rules (especially advanced rules) need to be restored, either re-read from
- * hardware or added again. For example after the reset. 'recp_created' flag
- * prevents from doing that and need to be cleared upfront.
- */
-static void ice_clear_sw_switch_recipes(struct ice_pf *pf)
-{
-	struct ice_sw_recipe *recp;
-	u8 i;
-
-	recp = pf->hw.switch_info->recp_list;
-	for (i = 0; i < ICE_MAX_NUM_RECIPES; i++)
-		recp[i].recp_created = false;
-}
-
 /**
  * ice_prepare_for_reset - prep for reset
  * @pf: board private structure
@@ -576,8 +557,9 @@ ice_prepare_for_reset(struct ice_pf *pf, enum ice_reset_req reset_type)
 	mutex_unlock(&pf->vfs.table_lock);
 
 	if (ice_is_eswitch_mode_switchdev(pf)) {
-		if (reset_type != ICE_RESET_PFR)
-			ice_clear_sw_switch_recipes(pf);
+		rtnl_lock();
+		ice_eswitch_br_fdb_flush(pf->eswitch.br_offloads->bridge);
+		rtnl_unlock();
 	}
 
 	/* release ADQ specific HW and SW resources */
-- 
2.42.0