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authorDragos Tatulea <dtatulea@nvidia.com>2023-12-25 18:12:03 +0300
committerMichael S. Tsirkin <mst@redhat.com>2024-01-10 21:01:38 +0300
commitf16d65124380ac6de8055c4a8e5373a1043bb09b (patch)
treea44bf3ea0bd0616ecb2a7398c25525976b8bb971 /drivers/vdpa
parenta06bd11b18fdf2d40e2b81d4318abc6cc38e70c9 (diff)
downloadlinux-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 PĂ©rez <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.h2
-rw-r--r--drivers/vdpa/mlx5/core/mr.c23
-rw-r--r--drivers/vdpa/mlx5/net/mlx5_vnet.c2
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)