| Dai Ngo | 0cfcd40 | 2020-10-18 23:42:49 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| Dai Ngo | 0cfcd40 | 2020-10-18 23:42:49 -0400 | [diff] [blame] | 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 */ |