blob: b9734904f5f01ca89427c79c4851e0fc378318dd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
* Copyright (c) 2013-2020, Mellanox Technologies inc. All rights reserved.
*/
#ifndef _MLX5_IB_FS_H
#define _MLX5_IB_FS_H
#include "mlx5_ib.h"
#if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS)
int mlx5_ib_fs_init(struct mlx5_ib_dev *dev);
void mlx5_ib_fs_cleanup_anchor(struct mlx5_ib_dev *dev);
#else
static inline int mlx5_ib_fs_init(struct mlx5_ib_dev *dev)
{
dev->flow_db = kzalloc(sizeof(*dev->flow_db), GFP_KERNEL);
if (!dev->flow_db)
return -ENOMEM;
mutex_init(&dev->flow_db->lock);
return 0;
}
inline void mlx5_ib_fs_cleanup_anchor(struct mlx5_ib_dev *dev) {}
#endif
static inline void mlx5_ib_fs_cleanup(struct mlx5_ib_dev *dev)
{
/* When a steering anchor is created, a special flow table is also
* created for the user to reference. Since the user can reference it,
* the kernel cannot trust that when the user destroys the steering
* anchor, they no longer reference the flow table.
*
* To address this issue, when a user destroys a steering anchor, only
* the flow steering rule in the table is destroyed, but the table
* itself is kept to deal with the above scenario. The remaining
* resources are only removed when the RDMA device is destroyed, which
* is a safe assumption that all references are gone.
*/
mlx5_ib_fs_cleanup_anchor(dev);
kfree(dev->flow_db);
}
#endif /* _MLX5_IB_FS_H */
|
