fs.h

 1/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
 2/*
 3 * Copyright (c) 2013-2020, Mellanox Technologies inc. All rights reserved.
 4 */
 5
 6#ifndef _MLX5_IB_FS_H
 7#define _MLX5_IB_FS_H
 8
 9#include "mlx5_ib.h"
10
11int mlx5_ib_fs_init(struct mlx5_ib_dev *dev);
12void mlx5_ib_fs_cleanup_anchor(struct mlx5_ib_dev *dev);
13
14static inline void mlx5_ib_fs_cleanup(struct mlx5_ib_dev *dev)
15{
16	int i;
17
18	/* When a steering anchor is created, a special flow table is also
19	 * created for the user to reference. Since the user can reference it,
20	 * the kernel cannot trust that when the user destroys the steering
21	 * anchor, they no longer reference the flow table.
22	 *
23	 * To address this issue, when a user destroys a steering anchor, only
24	 * the flow steering rule in the table is destroyed, but the table
25	 * itself is kept to deal with the above scenario. The remaining
26	 * resources are only removed when the RDMA device is destroyed, which
27	 * is a safe assumption that all references are gone.
28	 */
29	mlx5_ib_fs_cleanup_anchor(dev);
30	for (i = 0; i < MLX5_RDMA_TRANSPORT_BYPASS_PRIO; i++)
31		kfree(dev->flow_db->rdma_transport_tx[i]);
32	for (i = 0; i < MLX5_RDMA_TRANSPORT_BYPASS_PRIO; i++)
33		kfree(dev->flow_db->rdma_transport_rx[i]);
34	kfree(dev->flow_db);
35}
36#endif /* _MLX5_IB_FS_H */