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