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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * include/linux/nfs_ssc.h
4 *
5 * Author: Dai Ngo <dai.ngo@oracle.com>
6 *
7 * Copyright (c) 2020, Oracle and/or its affiliates.
8 */
9
10#include <linux/nfs_fs.h>
11
12extern struct nfs_ssc_client_ops_tbl nfs_ssc_client_tbl;
13
14/*
15 * NFS_V4
16 */
17struct nfs4_ssc_client_ops {
18 struct file *(*sco_open)(struct vfsmount *ss_mnt,
19 struct nfs_fh *src_fh, nfs4_stateid *stateid);
20 void (*sco_close)(struct file *filep);
21};
22
23/*
24 * NFS_FS
25 */
26struct nfs_ssc_client_ops {
27 void (*sco_sb_deactive)(struct super_block *sb);
28};
29
30struct nfs_ssc_client_ops_tbl {
31 const struct nfs4_ssc_client_ops *ssc_nfs4_ops;
32 const struct nfs_ssc_client_ops *ssc_nfs_ops;
33};
34
35extern void nfs42_ssc_register_ops(void);
36extern void nfs42_ssc_unregister_ops(void);
37
38extern void nfs42_ssc_register(const struct nfs4_ssc_client_ops *ops);
39extern void nfs42_ssc_unregister(const struct nfs4_ssc_client_ops *ops);
40
41#ifdef CONFIG_NFSD_V4_2_INTER_SSC
42static inline struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
43 struct nfs_fh *src_fh, nfs4_stateid *stateid)
44{
45 if (nfs_ssc_client_tbl.ssc_nfs4_ops)
46 return (*nfs_ssc_client_tbl.ssc_nfs4_ops->sco_open)(ss_mnt, src_fh, stateid);
47 return ERR_PTR(-EIO);
48}
49
50static inline void nfs42_ssc_close(struct file *filep)
51{
52 if (nfs_ssc_client_tbl.ssc_nfs4_ops)
53 (*nfs_ssc_client_tbl.ssc_nfs4_ops->sco_close)(filep);
54}
55#endif
56
57/*
58 * NFS_FS
59 */
60extern void nfs_ssc_register(const struct nfs_ssc_client_ops *ops);
61extern void nfs_ssc_unregister(const struct nfs_ssc_client_ops *ops);
62
63static inline void nfs_do_sb_deactive(struct super_block *sb)
64{
65 if (nfs_ssc_client_tbl.ssc_nfs_ops)
66 (*nfs_ssc_client_tbl.ssc_nfs_ops->sco_sb_deactive)(sb);
67}