diff options
| author | Dragos Tatulea <dtatulea@nvidia.com> | 2023-12-25 18:12:03 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-01-10 21:01:38 +0300 |
| commit | f16d65124380ac6de8055c4a8e5373a1043bb09b (patch) | |
| tree | a44bf3ea0bd0616ecb2a7398c25525976b8bb971 /drivers/vdpa | |
| parent | a06bd11b18fdf2d40e2b81d4318abc6cc38e70c9 (diff) | |
| download | linux-f16d65124380ac6de8055c4a8e5373a1043bb09b.tar.xz | |
vdpa/mlx5: Add mkey leak detection
Track allocated mrs in a list and show warning when leaks are detected
on device free or reset.
Reviewed-by: Gal Pressman <gal@nvidia.com>
Acked-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Message-Id: <20231225151203.152687-9-dtatulea@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa')
| -rw-r--r-- | drivers/vdpa/mlx5/core/mlx5_vdpa.h | 2 | ||||
| -rw-r--r-- | drivers/vdpa/mlx5/core/mr.c | 23 | ||||
| -rw-r--r-- | drivers/vdpa/mlx5/net/mlx5_vnet.c | 2 |
3 files changed, 27 insertions, 0 deletions
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 133cbb66dcfe..778821bab7d9 100644 --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c @@ -3722,6 +3722,8 @@ 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) |