[{"id":3675233,"web_url":"http://patchwork.ozlabs.org/comment/3675233/","msgid":"","list_archive_url":null,"date":"2026-04-09T10:10:52","subject":"Re: [Intel-wired-lan] [PATCH iwl-next 2/4] iavf: stop removing VLAN\n filters from PF on interface down","submitter":{"id":85634,"url":"http://patchwork.ozlabs.org/api/people/85634/","name":"Romanowski, Rafal","email":"rafal.romanowski@intel.com"},"content":"> -----Original Message-----\n> From: Intel-wired-lan On Behalf Of Petr\n> Oros\n> Sent: Monday, March 16, 2026 11:42 AM\n> To: netdev@vger.kernel.org\n> Cc: Kitszel, Przemyslaw ; Eric Dumazet\n> ; linux-kernel@vger.kernel.org; Andrew Lunn\n> ; Nguyen, Anthony L ;\n> intel-wired-lan@lists.osuosl.org; Keller, Jacob E ;\n> Jakub Kicinski ; Paolo Abeni ; David S.\n> Miller \n> Subject: [Intel-wired-lan] [PATCH iwl-next 2/4] iavf: stop removing VLAN filters\n> from PF on interface down\n> \n> When a VF goes down, the driver currently sends DEL_VLAN to the PF for every\n> VLAN filter (ACTIVE -> DISABLE -> send DEL -> INACTIVE), then re-adds them all\n> on UP (INACTIVE -> ADD -> send ADD -> ADDING -> ACTIVE). This round-trip is\n> unnecessary because:\n> \n> 1. The PF disables the VF's queues via VIRTCHNL_OP_DISABLE_QUEUES,\n> which already prevents all RX/TX traffic regardless of VLAN filter\n> state.\n> \n> 2. The VLAN filters remaining in PF HW while the VF is down is\n> harmless - packets matching those filters have nowhere to go with\n> queues disabled.\n> \n> 3. The DEL+ADD cycle during down/up creates race windows where the\n> VLAN filter list is incomplete. With spoofcheck enabled, the PF\n> enables TX VLAN filtering on the first non-zero VLAN add, blocking\n> traffic for any VLANs not yet re-added.\n> \n> Remove the entire DISABLE/INACTIVE state machinery:\n> - Remove IAVF_VLAN_DISABLE and IAVF_VLAN_INACTIVE enum values\n> - Remove iavf_restore_filters() and its call from iavf_open()\n> - Remove VLAN filter handling from iavf_clear_mac_vlan_filters(),\n> rename it to iavf_clear_mac_filters()\n> - Remove DEL_VLAN_FILTER scheduling from iavf_down()\n> - Remove all DISABLE/INACTIVE handling from iavf_del_vlans()\n> \n> VLAN filters now stay ACTIVE across down/up cycles. Only explicit user removal\n> (ndo_vlan_rx_kill_vid) or PF/VF reset triggers VLAN filter deletion/re-addition.\n> \n> Signed-off-by: Petr Oros \n> ---\n> drivers/net/ethernet/intel/iavf/iavf.h | 6 +--\n> drivers/net/ethernet/intel/iavf/iavf_main.c | 39 ++-----------------\n> .../net/ethernet/intel/iavf/iavf_virtchnl.c | 33 +++-------------\n> 3 files changed, 12 insertions(+), 66 deletions(-)\n> \n> diff --git a/drivers/net/ethernet/intel/iavf/iavf.h\n> b/drivers/net/ethernet/intel/iavf/iavf.h\n> index 8e6db72828ae14..1ad00690622c8e 100644\n> --- a/drivers/net/ethernet/intel/iavf/iavf.h\n> +++ b/drivers/net/ethernet/intel/iavf/iavf.h\n> @@ -159,10 +159,8 @@ enum iavf_vlan_state_t {\n\nTested-by: Rafal Romanowski ","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","intel-wired-lan@lists.osuosl.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","intel-wired-lan@lists.osuosl.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=osuosl.org header.i=@osuosl.org header.a=rsa-sha256\n header.s=default header.b=WglyqQOB;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=140.211.166.138; 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