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Fri, 15 Dec 2023 06:02:14 -0800 From: Dragos Tatulea To: "Michael S . Tsirkin" , Jason Wang , Eugenio Perez Martin , Si-Wei Liu , Saeed Mahameed , Leon Romanovsky , , Gal Pressman CC: Dragos Tatulea , , , Parav Pandit , Xuan Zhuo Subject: [PATCH vhost v3 6/6] vdpa/mlx5: Add mkey leak detection Date: Fri, 15 Dec 2023 16:01:46 +0200 Message-ID: <20231215140146.95816-7-dtatulea@nvidia.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231215140146.95816-1-dtatulea@nvidia.com> References: <20231215140146.95816-1-dtatulea@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EDD6:EE_|SA0PR12MB4509:EE_ X-MS-Office365-Filtering-Correlation-Id: 26b1cacc-f9af-4db3-c419-08dbfd767e47 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230031)(4636009)(39860400002)(396003)(376002)(346002)(136003)(230273577357003)(230173577357003)(230922051799003)(1800799012)(186009)(64100799003)(82310400011)(451199024)(46966006)(40470700004)(36840700001)(40480700001)(40460700003)(36860700001)(47076005)(356005)(82740400003)(2906002)(36756003)(5660300002)(83380400001)(336012)(6666004)(66574015)(426003)(7636003)(1076003)(26005)(2616005)(478600001)(54906003)(70206006)(70586007)(41300700001)(86362001)(110136005)(4326008)(8676002)(8936002)(6636002)(316002);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Dec 2023 14:02:36.8251 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 26b1cacc-f9af-4db3-c419-08dbfd767e47 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EDD6.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4509 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1785357158727726843 X-GMAIL-MSGID: 1785357158727726843 Track allocated mrs in a list and show warning when leaks are detected on device free or reset. Reviewed-by: Gal Pressman Acked-by: Eugenio Pérez Signed-off-by: Dragos Tatulea --- drivers/vdpa/mlx5/core/mlx5_vdpa.h | 2 ++ drivers/vdpa/mlx5/core/mr.c | 23 +++++++++++++++++++++++ drivers/vdpa/mlx5/net/mlx5_vnet.c | 2 ++ 3 files changed, 27 insertions(+) diff --git a/drivers/vdpa/mlx5/core/mlx5_vdpa.h b/drivers/vdpa/mlx5/core/mlx5_vdpa.h index 1a0d27b6e09a..50aac8fe57ef 100644 --- a/drivers/vdpa/mlx5/core/mlx5_vdpa.h +++ b/drivers/vdpa/mlx5/core/mlx5_vdpa.h @@ -37,6 +37,7 @@ struct mlx5_vdpa_mr { bool user_mr; refcount_t refcount; + struct list_head mr_list; }; struct mlx5_vdpa_resources { @@ -95,6 +96,7 @@ struct mlx5_vdpa_dev { u32 generation; struct mlx5_vdpa_mr *mr[MLX5_VDPA_NUM_AS]; + struct list_head mr_list_head; /* serialize mr access */ struct mutex mr_mtx; struct mlx5_control_vq cvq; diff --git a/drivers/vdpa/mlx5/core/mr.c b/drivers/vdpa/mlx5/core/mr.c index c7dc8914354a..4758914ccf86 100644 --- a/drivers/vdpa/mlx5/core/mr.c +++ b/drivers/vdpa/mlx5/core/mr.c @@ -508,6 +508,8 @@ static void _mlx5_vdpa_destroy_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_ vhost_iotlb_free(mr->iotlb); + list_del(&mr->mr_list); + kfree(mr); } @@ -560,12 +562,31 @@ void mlx5_vdpa_update_mr(struct mlx5_vdpa_dev *mvdev, mutex_unlock(&mvdev->mr_mtx); } +static void mlx5_vdpa_show_mr_leaks(struct mlx5_vdpa_dev *mvdev) +{ + struct mlx5_vdpa_mr *mr; + + mutex_lock(&mvdev->mr_mtx); + + list_for_each_entry(mr, &mvdev->mr_list_head, mr_list) { + + mlx5_vdpa_warn(mvdev, "mkey still alive after resource delete: " + "mr: %p, mkey: 0x%x, refcount: %u\n", + mr, mr->mkey, refcount_read(&mr->refcount)); + } + + mutex_unlock(&mvdev->mr_mtx); + +} + void mlx5_vdpa_destroy_mr_resources(struct mlx5_vdpa_dev *mvdev) { for (int i = 0; i < MLX5_VDPA_NUM_AS; i++) mlx5_vdpa_update_mr(mvdev, NULL, i); prune_iotlb(mvdev->cvq.iotlb); + + mlx5_vdpa_show_mr_leaks(mvdev); } static int _mlx5_vdpa_create_mr(struct mlx5_vdpa_dev *mvdev, @@ -592,6 +613,8 @@ static int _mlx5_vdpa_create_mr(struct mlx5_vdpa_dev *mvdev, if (err) goto err_iotlb; + list_add_tail(&mr->mr_list, &mvdev->mr_list_head); + return 0; err_iotlb: diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c index 0df82e4d13f4..88b633682e18 100644 --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c @@ -3707,6 +3707,8 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name, if (err) goto err_mpfs; + INIT_LIST_HEAD(&mvdev->mr_list_head); + if (MLX5_CAP_GEN(mvdev->mdev, umem_uid_0)) { err = mlx5_vdpa_create_dma_mr(mvdev); if (err)