From patchwork Mon Nov 16 09:13:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gregory Etelson X-Patchwork-Id: 84218 X-Patchwork-Delegate: rasland@nvidia.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 3898AA04DB; Mon, 16 Nov 2020 10:15:52 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 269ABC93C; Mon, 16 Nov 2020 10:14:00 +0100 (CET) Received: from hqnvemgate26.nvidia.com (hqnvemgate26.nvidia.com [216.228.121.65]) by dpdk.org (Postfix) with ESMTP id 1B0E0C928 for ; Mon, 16 Nov 2020 10:13:56 +0100 (CET) Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate26.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Mon, 16 Nov 2020 01:13:59 -0800 Received: from nvidia.com (10.124.1.5) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 16 Nov 2020 09:13:53 +0000 From: Gregory Etelson To: CC: , , , Viacheslav Ovsiienko , Shahaf Shuler , Xueming Li Date: Mon, 16 Nov 2020 11:13:26 +0200 Message-ID: <20201116091326.10511-7-getelson@nvidia.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201116091326.10511-1-getelson@nvidia.com> References: <20201111071417.21177-1-getelson@nvidia.com> <20201116091326.10511-1-getelson@nvidia.com> MIME-Version: 1.0 X-Originating-IP: [10.124.1.5] X-ClientProxiedBy: HQMAIL101.nvidia.com (172.20.187.10) To HQMAIL107.nvidia.com (172.20.187.13) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1605518039; bh=Eza60s6cTzmXaU/4f7HioY2amc6axmr0Lr+ra1GBleg=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To: References:MIME-Version:Content-Transfer-Encoding:Content-Type: X-Originating-IP:X-ClientProxiedBy; b=SICr4YLZsybRoNU1bePxWQw+hrIlHqSoMCgB5dv2Ls8+G7do2WcQlfZ+4uedAqPQg elJiDyafcF6bFFzZt94+B8s883saq9CGaaQvrl82GIp2cB/j54ww8inlZa1DoorX9k swCPEeZADIzyADdJkVn3ZGkajp9gcQznmap6oNAj1ENsrq0Uu+jEs2eMKd9KWhBshH TJWJ/n6LU9RN3pM8re5EmJwEBGMifiHT/DqEdMsTo0RWhQC9l45fh4ot/s4JgsWQAg VnuTf/q3bSUvqH9WWSlfbx477sxWcgKuklUrjMpdLXXaj6bzoyKXxpFlVnwv0SYQuc B0QmNT0FG9hOw== Subject: [dpdk-dev] [PATCH v3 6/6] net/mlx5: fix crash in tunnel offload setup X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" The new flow table resource management API triggered a PMD crash in tunnel offload mode, when tunnel match flow rule was inserted before tunnel set rule. Reason for the crash was double flow table registration. The table was registered by the tunnel offload code for the first time and once more by PMD code, as part of general table processing. The table counter was decremented only once during the rule destruction and caused a resource leak that triggered the crash. The patch updates PMD registration with tunnel offload parameters and removes table registration in tunnel related code. Fixes: 663ad57dabb2 ("net/mlx5: make flow table cache thread safe") Signed-off-by: Gregory Etelson Acked-by: Viacheslav Ovsiienko --- drivers/net/mlx5/mlx5_flow.c | 2 +- drivers/net/mlx5/mlx5_flow_dv.c | 39 +++++++++++++++++---------------- 2 files changed, 21 insertions(+), 20 deletions(-) diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c index 6efe799a2d..b0187b68e6 100644 --- a/drivers/net/mlx5/mlx5_flow.c +++ b/drivers/net/mlx5/mlx5_flow.c @@ -6843,7 +6843,7 @@ mlx5_flow_group_to_table(struct rte_eth_dev *dev, standard_translation = true; } DRV_LOG(DEBUG, - "port %u group=%#x transfer=%d external=%d fdb_def_rule=%d translate=%s", + "port %u group=%u transfer=%d external=%d fdb_def_rule=%d translate=%s", dev->data->port_id, group, grp_info->transfer, grp_info->external, grp_info->fdb_def_rule, standard_translation ? "STANDARD" : "TUNNEL"); diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c index 25ab9adee6..5e230a3c25 100644 --- a/drivers/net/mlx5/mlx5_flow_dv.c +++ b/drivers/net/mlx5/mlx5_flow_dv.c @@ -8042,6 +8042,8 @@ flow_dv_tbl_resource_get(struct rte_eth_dev *dev, "cannot get table"); return NULL; } + DRV_LOG(DEBUG, "Table_id %u tunnel %u group %u registered.", + table_id, tunnel ? tunnel->tunnel_id : 0, group_id); tbl_data = container_of(entry, struct mlx5_flow_tbl_data_entry, entry); return &tbl_data->tbl; } @@ -8080,7 +8082,7 @@ flow_dv_tbl_remove_cb(struct mlx5_hlist *list, if (he) mlx5_hlist_unregister(tunnel_grp_hash, he); DRV_LOG(DEBUG, - "Table_id %#x tunnel %u group %u released.", + "Table_id %u tunnel %u group %u released.", table_id, tbl_data->tunnel ? tbl_data->tunnel->tunnel_id : 0, @@ -8192,6 +8194,8 @@ flow_dv_matcher_register(struct rte_eth_dev *dev, struct mlx5_flow_dv_matcher *ref, union mlx5_flow_tbl_key *key, struct mlx5_flow *dev_flow, + const struct mlx5_flow_tunnel *tunnel, + uint32_t group_id, struct rte_flow_error *error) { struct mlx5_cache_entry *entry; @@ -8203,8 +8207,14 @@ flow_dv_matcher_register(struct rte_eth_dev *dev, .data = ref, }; - tbl = flow_dv_tbl_resource_get(dev, key->table_id, key->direction, - key->domain, false, NULL, 0, 0, error); + /** + * tunnel offload API requires this registration for cases when + * tunnel match rule was inserted before tunnel set rule. + */ + tbl = flow_dv_tbl_resource_get(dev, key->table_id, + key->direction, key->domain, + dev_flow->external, tunnel, + group_id, 0, error); if (!tbl) return -rte_errno; /* No need to refill the error info */ tbl_data = container_of(tbl, struct mlx5_flow_tbl_data_entry, tbl); @@ -9611,10 +9621,14 @@ flow_dv_translate(struct rte_eth_dev *dev, /* * do not add decap action if match rule drops packet * HW rejects rules with decap & drop + * + * if tunnel match rule was inserted before matching tunnel set + * rule flow table used in the match rule must be registered. + * current implementation handles that in the + * flow_dv_match_register() at the function end. */ bool add_decap = true; const struct rte_flow_action *ptr = actions; - struct mlx5_flow_tbl_resource *tbl; for (; ptr->type != RTE_FLOW_ACTION_TYPE_END; ptr++) { if (ptr->type == RTE_FLOW_ACTION_TYPE_DROP) { @@ -9631,20 +9645,6 @@ flow_dv_translate(struct rte_eth_dev *dev, dev_flow->dv.encap_decap->action; action_flags |= MLX5_FLOW_ACTION_DECAP; } - /* - * bind table_id with for tunnel match rule. - * Tunnel set rule establishes that bind in JUMP action handler. - * Required for scenario when application creates tunnel match - * rule before tunnel set rule. - */ - tbl = flow_dv_tbl_resource_get(dev, table, attr->egress, - attr->transfer, - !!dev_flow->external, tunnel, - attr->group, 0, error); - if (!tbl) - return rte_flow_error_set - (error, EINVAL, RTE_FLOW_ERROR_TYPE_ACTION, - actions, "cannot register tunnel group"); } for (; !actions_end ; actions++) { const struct rte_flow_action_queue *queue; @@ -10474,7 +10474,8 @@ flow_dv_translate(struct rte_eth_dev *dev, tbl_key.domain = attr->transfer; tbl_key.direction = attr->egress; tbl_key.table_id = dev_flow->dv.group; - if (flow_dv_matcher_register(dev, &matcher, &tbl_key, dev_flow, error)) + if (flow_dv_matcher_register(dev, &matcher, &tbl_key, dev_flow, + tunnel, attr->group, error)) return -rte_errno; return 0; }