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GET /api/1.2/patches/2224527/?format=api
{ "id": 2224527, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2224527/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/dc7fb6f6bc737049a9ab8c42bd2f4b34b477907a.1776426683.git.poros@redhat.com/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/1.2/projects/46/?format=api", "name": "Intel Wired Ethernet development", "link_name": "intel-wired-lan", "list_id": "intel-wired-lan.osuosl.org", "list_email": "intel-wired-lan@osuosl.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<dc7fb6f6bc737049a9ab8c42bd2f4b34b477907a.1776426683.git.poros@redhat.com>", "list_archive_url": null, "date": "2026-04-17T14:29:44", "name": "[iwl-net,v2,3/4] iavf: wait for PF confirmation before removing VLAN filters", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "bcb497c7928deeba032a958c98c3825711466ab6", "submitter": { "id": 74657, "url": "http://patchwork.ozlabs.org/api/1.2/people/74657/?format=api", "name": "Petr Oros", "email": "poros@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/dc7fb6f6bc737049a9ab8c42bd2f4b34b477907a.1776426683.git.poros@redhat.com/mbox/", "series": [ { "id": 500351, "url": "http://patchwork.ozlabs.org/api/1.2/series/500351/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/list/?series=500351", "date": "2026-04-17T14:29:41", "name": "iavf: fix VLAN filter state machine races", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/500351/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2224527/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2224527/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<intel-wired-lan-bounces@osuosl.org>", "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=Ytvr/f0h;\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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client-ip=170.10.129.124;\n helo=us-smtp-delivery-124.mimecast.com; envelope-from=poros@redhat.com;\n receiver=<UNKNOWN>", "DMARC-Filter": "OpenDMARC Filter v1.4.2 smtp1.osuosl.org 1D75F80A85", "X-MC-Unique": "qN3pg3HzOBS6RW1OI8S-DA-1", "X-Mimecast-MFC-AGG-ID": "qN3pg3HzOBS6RW1OI8S-DA_1776436207", "From": "Petr Oros <poros@redhat.com>", "To": "netdev@vger.kernel.org", "Date": "Fri, 17 Apr 2026 16:29:44 +0200", "Message-ID": "\n <dc7fb6f6bc737049a9ab8c42bd2f4b34b477907a.1776426683.git.poros@redhat.com>", "In-Reply-To": "<cover.1776426683.git.poros@redhat.com>", "References": "<cover.1776426683.git.poros@redhat.com>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.93", "X-Mimecast-MFC-PROC-ID": "3KRT8FsTIiGIDr6mUpcYJEYH8u9w9U3VeDIcy1iMxek_1776436207", "X-Mimecast-Originator": "redhat.com", "Content-Transfer-Encoding": "8bit", "content-type": "text/plain; charset=\"US-ASCII\"; x-default=true", "X-Mailman-Original-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=redhat.com;\n s=mimecast20190719; t=1776436215;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:content-type:content-type:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=So3UL4GLmFGEb2cMh3LixTfYDLK8oXuy3PKPaHp8JM4=;\n b=NSnnsffYFG+qI1rEd6gm3AJjbYt0MPYFw7XY5iQOGzTV2rSKkf2/I/8eTWarx3yvxrvUVz\n he45X2pnWmywpBvBLdAf97u9Go6jJ9w28DL6X6nkdSQj/v6JSWqU8e89EKjo5/UVeWfIMU\n JS9v4NbDjuiEU3l8faIGjrR4gFzJIZ4=", "X-Mailman-Original-Authentication-Results": [ "smtp1.osuosl.org;\n dmarc=pass (p=quarantine dis=none)\n header.from=redhat.com", "smtp1.osuosl.org;\n dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com\n header.a=rsa-sha256 header.s=mimecast20190719 header.b=NSnnsffY" ], "Subject": "[Intel-wired-lan] [PATCH iwl-net v2 3/4] iavf: wait for PF\n confirmation before removing VLAN filters", "X-BeenThere": "intel-wired-lan@osuosl.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Intel Wired Ethernet Linux Kernel Driver Development\n <intel-wired-lan.osuosl.org>", "List-Unsubscribe": "<https://lists.osuosl.org/mailman/options/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=unsubscribe>", "List-Archive": "<http://lists.osuosl.org/pipermail/intel-wired-lan/>", "List-Post": "<mailto:intel-wired-lan@osuosl.org>", "List-Help": "<mailto:intel-wired-lan-request@osuosl.org?subject=help>", "List-Subscribe": "<https://lists.osuosl.org/mailman/listinfo/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=subscribe>", "Cc": "Przemyslaw Patynowski <przemyslawx.patynowski@intel.com>,\n Aaron Brown <aaron.f.brown@intel.com>,\n Przemek Kitszel <przemyslaw.kitszel@intel.com>,\n Mitch Williams <mitch.a.williams@intel.com>,\n Eric Dumazet <edumazet@google.com>, \"David S. Miller\" <davem@davemloft.net>,\n Aleksandr Loktionov <aleksandr.loktionov@intel.com>,\n Andrew Lunn <andrew+netdev@lunn.ch>,\n Tony Nguyen <anthony.l.nguyen@intel.com>,\n Jesse Brandeburg <jesse.brandeburg@intel.com>, jacob.e.keller@intel.com,\n Jakub Kicinski <kuba@kernel.org>,\n Jedrzej Jagielski <jedrzej.jagielski@intel.com>,\n Paolo Abeni <pabeni@redhat.com>,\n Rafal Romanowski <rafal.romanowski@intel.com>,\n linux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org", "Errors-To": "intel-wired-lan-bounces@osuosl.org", "Sender": "\"Intel-wired-lan\" <intel-wired-lan-bounces@osuosl.org>" }, "content": "The VLAN filter DELETE path was asymmetric with the ADD path: ADD\nwaits for PF confirmation (ADD -> ADDING -> ACTIVE), but DELETE\nimmediately frees the filter struct after sending the DEL message\nwithout waiting for the PF response.\n\nThis is problematic because:\n - If the PF rejects the DEL, the filter remains in HW but the driver\n has already freed the tracking structure, losing sync.\n - Race conditions between DEL pending and other operations\n (add, reset) cannot be properly resolved if the filter struct\n is already gone.\n\nAdd IAVF_VLAN_REMOVING state to make the DELETE path symmetric:\n\n REMOVE -> REMOVING (send DEL) -> PF confirms -> kfree\n -> PF rejects -> ACTIVE\n\nIn iavf_del_vlans(), transition filters from REMOVE to REMOVING\ninstead of immediately freeing them. The new DEL completion handler\nin iavf_virtchnl_completion() frees filters on success or reverts\nthem to ACTIVE on error.\n\nUpdate iavf_add_vlan() to handle the REMOVING state: if a DEL is\npending and the user re-adds the same VLAN, queue it for ADD so\nit gets re-programmed after the PF processes the DEL.\n\nThe !VLAN_FILTERING_ALLOWED early-exit path still frees filters\ndirectly since no PF message is sent in that case.\n\nAlso update iavf_del_vlan() to skip filters already in REMOVING\nstate: DEL has been sent to PF and the completion handler will\nfree the filter when PF confirms. Without this guard, the sequence\nDEL(pending) -> user-del -> second DEL could cause the PF to return\nan error for the second DEL (filter already gone), causing the\ncompletion handler to incorrectly revert a deleted filter back to\nACTIVE.\n\nFixes: 968996c070ef (\"iavf: Fix VLAN_V2 addition/rejection\")\nSigned-off-by: Petr Oros <poros@redhat.com>\nReviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>\nTested-by: Rafal Romanowski <rafal.romanowski@intel.com>\n---\n drivers/net/ethernet/intel/iavf/iavf.h | 1 +\n drivers/net/ethernet/intel/iavf/iavf_main.c | 13 ++++---\n .../net/ethernet/intel/iavf/iavf_virtchnl.c | 37 +++++++++++++------\n 3 files changed, 34 insertions(+), 17 deletions(-)", "diff": "diff --git a/drivers/net/ethernet/intel/iavf/iavf.h b/drivers/net/ethernet/intel/iavf/iavf.h\nindex 5765715914d6b2..050f8241ef5e6b 100644\n--- a/drivers/net/ethernet/intel/iavf/iavf.h\n+++ b/drivers/net/ethernet/intel/iavf/iavf.h\n@@ -161,6 +161,7 @@ enum iavf_vlan_state_t {\n \tIAVF_VLAN_ADDING,\t/* ADD sent to PF, waiting for response */\n \tIAVF_VLAN_ACTIVE,\t/* PF confirmed, filter is in HW */\n \tIAVF_VLAN_REMOVE,\t/* filter queued for DEL from PF */\n+\tIAVF_VLAN_REMOVING,\t/* DEL sent to PF, waiting for response */\n };\n \n struct iavf_vlan_filter {\ndiff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c\nindex 12e102506011a6..d373feee4c7e9c 100644\n--- a/drivers/net/ethernet/intel/iavf/iavf_main.c\n+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c\n@@ -757,10 +757,10 @@ iavf_vlan_filter *iavf_add_vlan(struct iavf_adapter *adapter,\n \t\tadapter->num_vlan_filters++;\n \t\tiavf_schedule_aq_request(adapter, IAVF_FLAG_AQ_ADD_VLAN_FILTER);\n \t} else if (f->state == IAVF_VLAN_REMOVE) {\n-\t\t/* Re-add the filter since we cannot tell whether the\n-\t\t * pending delete has already been processed by the PF.\n-\t\t * A duplicate add is harmless.\n-\t\t */\n+\t\t/* DEL not yet sent to PF, cancel it */\n+\t\tf->state = IAVF_VLAN_ACTIVE;\n+\t} else if (f->state == IAVF_VLAN_REMOVING) {\n+\t\t/* DEL already sent to PF, re-add after completion */\n \t\tf->state = IAVF_VLAN_ADD;\n \t\tiavf_schedule_aq_request(adapter,\n \t\t\t\t\t IAVF_FLAG_AQ_ADD_VLAN_FILTER);\n@@ -791,11 +791,14 @@ static void iavf_del_vlan(struct iavf_adapter *adapter, struct iavf_vlan vlan)\n \t\t\tlist_del(&f->list);\n \t\t\tkfree(f);\n \t\t\tadapter->num_vlan_filters--;\n-\t\t} else {\n+\t\t} else if (f->state != IAVF_VLAN_REMOVING) {\n \t\t\tf->state = IAVF_VLAN_REMOVE;\n \t\t\tiavf_schedule_aq_request(adapter,\n \t\t\t\t\t\t IAVF_FLAG_AQ_DEL_VLAN_FILTER);\n \t\t}\n+\t\t/* If REMOVING, DEL is already sent to PF; completion\n+\t\t * handler will free the filter when PF confirms.\n+\t\t */\n \t}\n \n \tspin_unlock_bh(&adapter->mac_vlan_list_lock);\ndiff --git a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c\nindex 4f197d908124e6..93ca79c3e3b535 100644\n--- a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c\n+++ b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c\n@@ -948,12 +948,10 @@ void iavf_del_vlans(struct iavf_adapter *adapter)\n \n \t\tvvfl->vsi_id = adapter->vsi_res->vsi_id;\n \t\tvvfl->num_elements = count;\n-\t\tlist_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {\n+\t\tlist_for_each_entry(f, &adapter->vlan_filter_list, list) {\n \t\t\tif (f->state == IAVF_VLAN_REMOVE) {\n \t\t\t\tvvfl->vlan_id[i] = f->vlan.vid;\n-\t\t\t\tlist_del(&f->list);\n-\t\t\t\tkfree(f);\n-\t\t\t\tadapter->num_vlan_filters--;\n+\t\t\t\tf->state = IAVF_VLAN_REMOVING;\n \t\t\t\ti++;\n \t\t\t\tif (i == count)\n \t\t\t\t\tbreak;\n@@ -990,7 +988,7 @@ void iavf_del_vlans(struct iavf_adapter *adapter)\n \n \t\tvvfl_v2->vport_id = adapter->vsi_res->vsi_id;\n \t\tvvfl_v2->num_elements = count;\n-\t\tlist_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {\n+\t\tlist_for_each_entry(f, &adapter->vlan_filter_list, list) {\n \t\t\tif (f->state == IAVF_VLAN_REMOVE) {\n \t\t\t\tstruct virtchnl_vlan_supported_caps *filtering_support =\n \t\t\t\t\t&adapter->vlan_v2_caps.filtering.filtering_support;\n@@ -1005,9 +1003,7 @@ void iavf_del_vlans(struct iavf_adapter *adapter)\n \t\t\t\tvlan->tci = f->vlan.vid;\n \t\t\t\tvlan->tpid = f->vlan.tpid;\n \n-\t\t\t\tlist_del(&f->list);\n-\t\t\t\tkfree(f);\n-\t\t\t\tadapter->num_vlan_filters--;\n+\t\t\t\tf->state = IAVF_VLAN_REMOVING;\n \t\t\t\ti++;\n \t\t\t\tif (i == count)\n \t\t\t\t\tbreak;\n@@ -2370,10 +2366,6 @@ void iavf_virtchnl_completion(struct iavf_adapter *adapter,\n \t\t\tether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);\n \t\t\twake_up(&adapter->vc_waitqueue);\n \t\t\tbreak;\n-\t\tcase VIRTCHNL_OP_DEL_VLAN:\n-\t\t\tdev_err(&adapter->pdev->dev, \"Failed to delete VLAN filter, error %s\\n\",\n-\t\t\t\tiavf_stat_str(&adapter->hw, v_retval));\n-\t\t\tbreak;\n \t\tcase VIRTCHNL_OP_DEL_ETH_ADDR:\n \t\t\tdev_err(&adapter->pdev->dev, \"Failed to delete MAC filter, error %s\\n\",\n \t\t\t\tiavf_stat_str(&adapter->hw, v_retval));\n@@ -2895,6 +2887,27 @@ void iavf_virtchnl_completion(struct iavf_adapter *adapter,\n \t\tspin_unlock_bh(&adapter->mac_vlan_list_lock);\n \t\t}\n \t\tbreak;\n+\tcase VIRTCHNL_OP_DEL_VLAN:\n+\tcase VIRTCHNL_OP_DEL_VLAN_V2: {\n+\t\tstruct iavf_vlan_filter *f, *ftmp;\n+\n+\t\tspin_lock_bh(&adapter->mac_vlan_list_lock);\n+\t\tlist_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list,\n+\t\t\t\t\t list) {\n+\t\t\tif (f->state == IAVF_VLAN_REMOVING) {\n+\t\t\t\tif (v_retval) {\n+\t\t\t\t\t/* PF rejected DEL, keep filter */\n+\t\t\t\t\tf->state = IAVF_VLAN_ACTIVE;\n+\t\t\t\t} else {\n+\t\t\t\t\tlist_del(&f->list);\n+\t\t\t\t\tkfree(f);\n+\t\t\t\t\tadapter->num_vlan_filters--;\n+\t\t\t\t}\n+\t\t\t}\n+\t\t}\n+\t\tspin_unlock_bh(&adapter->mac_vlan_list_lock);\n+\t\t}\n+\t\tbreak;\n \tcase VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:\n \t\t/* PF enabled vlan strip on this VF.\n \t\t * Update netdev->features if needed to be in sync with ethtool.\n", "prefixes": [ "iwl-net", "v2", "3/4" ] }