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0cfcd405 DN |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* | |
0cfcd405 DN |
3 | * Helper for knfsd's SSC to access ops in NFS client modules |
4 | * | |
5 | * Author: Dai Ngo <dai.ngo@oracle.com> | |
6 | * | |
7 | * Copyright (c) 2020, Oracle and/or its affiliates. | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/fs.h> | |
12 | #include <linux/nfs_ssc.h> | |
13 | #include "../nfs/nfs4_fs.h" | |
14 | ||
15 | MODULE_LICENSE("GPL"); | |
16 | ||
17 | struct nfs_ssc_client_ops_tbl nfs_ssc_client_tbl; | |
18 | EXPORT_SYMBOL_GPL(nfs_ssc_client_tbl); | |
19 | ||
20 | #ifdef CONFIG_NFS_V4_2 | |
21 | /** | |
22 | * nfs42_ssc_register - install the NFS_V4 client ops in the nfs_ssc_client_tbl | |
23 | * @ops: NFS_V4 ops to be installed | |
24 | * | |
25 | * Return values: | |
26 | * None | |
27 | */ | |
28 | void nfs42_ssc_register(const struct nfs4_ssc_client_ops *ops) | |
29 | { | |
30 | nfs_ssc_client_tbl.ssc_nfs4_ops = ops; | |
31 | } | |
32 | EXPORT_SYMBOL_GPL(nfs42_ssc_register); | |
33 | ||
34 | /** | |
35 | * nfs42_ssc_unregister - uninstall the NFS_V4 client ops from | |
36 | * the nfs_ssc_client_tbl | |
37 | * @ops: ops to be uninstalled | |
38 | * | |
39 | * Return values: | |
40 | * None | |
41 | */ | |
42 | void nfs42_ssc_unregister(const struct nfs4_ssc_client_ops *ops) | |
43 | { | |
44 | if (nfs_ssc_client_tbl.ssc_nfs4_ops != ops) | |
45 | return; | |
46 | ||
47 | nfs_ssc_client_tbl.ssc_nfs4_ops = NULL; | |
48 | } | |
49 | EXPORT_SYMBOL_GPL(nfs42_ssc_unregister); | |
50 | #endif /* CONFIG_NFS_V4_2 */ | |
51 | ||
52 | #ifdef CONFIG_NFS_V4_2 | |
53 | /** | |
54 | * nfs_ssc_register - install the NFS_FS client ops in the nfs_ssc_client_tbl | |
55 | * @ops: NFS_FS ops to be installed | |
56 | * | |
57 | * Return values: | |
58 | * None | |
59 | */ | |
60 | void nfs_ssc_register(const struct nfs_ssc_client_ops *ops) | |
61 | { | |
62 | nfs_ssc_client_tbl.ssc_nfs_ops = ops; | |
63 | } | |
64 | EXPORT_SYMBOL_GPL(nfs_ssc_register); | |
65 | ||
66 | /** | |
67 | * nfs_ssc_unregister - uninstall the NFS_FS client ops from | |
68 | * the nfs_ssc_client_tbl | |
69 | * @ops: ops to be uninstalled | |
70 | * | |
71 | * Return values: | |
72 | * None | |
73 | */ | |
74 | void nfs_ssc_unregister(const struct nfs_ssc_client_ops *ops) | |
75 | { | |
76 | if (nfs_ssc_client_tbl.ssc_nfs_ops != ops) | |
77 | return; | |
78 | nfs_ssc_client_tbl.ssc_nfs_ops = NULL; | |
79 | } | |
80 | EXPORT_SYMBOL_GPL(nfs_ssc_unregister); | |
81 | ||
82 | #else | |
83 | void nfs_ssc_register(const struct nfs_ssc_client_ops *ops) | |
84 | { | |
85 | } | |
86 | EXPORT_SYMBOL_GPL(nfs_ssc_register); | |
87 | ||
88 | void nfs_ssc_unregister(const struct nfs_ssc_client_ops *ops) | |
89 | { | |
90 | } | |
91 | EXPORT_SYMBOL_GPL(nfs_ssc_unregister); | |
92 | #endif /* CONFIG_NFS_V4_2 */ |