1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _FS_NFSD_PNFS_H
3#define _FS_NFSD_PNFS_H 1
4
5#ifdef CONFIG_NFSD_V4
6#include <linux/exportfs.h>
7#include <linux/nfsd/export.h>
8
9#include "state.h"
10#include "xdr4.h"
11
12struct xdr_stream;
13
14struct nfsd4_deviceid_map {
15	struct list_head	hash;
16	u64			idx;
17	int			fsid_type;
18	u32			fsid[];
19};
20
21struct nfsd4_layout_ops {
22	u32		notify_types;
23	bool		disable_recalls;
24
25	__be32 (*proc_getdeviceinfo)(struct super_block *sb,
26			struct svc_rqst *rqstp,
27			struct nfs4_client *clp,
28			struct nfsd4_getdeviceinfo *gdevp);
29	__be32 (*encode_getdeviceinfo)(struct xdr_stream *xdr,
30			const struct nfsd4_getdeviceinfo *gdevp);
31
32	__be32 (*proc_layoutget)(struct inode *, const struct svc_fh *fhp,
33			struct nfsd4_layoutget *lgp);
34	__be32 (*encode_layoutget)(struct xdr_stream *xdr,
35			const struct nfsd4_layoutget *lgp);
36
37	__be32 (*proc_layoutcommit)(struct inode *inode,
38			struct nfsd4_layoutcommit *lcp);
39
40	void (*fence_client)(struct nfs4_layout_stateid *ls,
41			     struct nfsd_file *file);
42};
43
44extern const struct nfsd4_layout_ops *nfsd4_layout_ops[];
45#ifdef CONFIG_NFSD_BLOCKLAYOUT
46extern const struct nfsd4_layout_ops bl_layout_ops;
47#endif
48#ifdef CONFIG_NFSD_SCSILAYOUT
49extern const struct nfsd4_layout_ops scsi_layout_ops;
50#endif
51#ifdef CONFIG_NFSD_FLEXFILELAYOUT
52extern const struct nfsd4_layout_ops ff_layout_ops;
53#endif
54
55__be32 nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp,
56		struct nfsd4_compound_state *cstate, stateid_t *stateid,
57		bool create, u32 layout_type, struct nfs4_layout_stateid **lsp);
58__be32 nfsd4_insert_layout(struct nfsd4_layoutget *lgp,
59		struct nfs4_layout_stateid *ls);
60__be32 nfsd4_return_file_layouts(struct svc_rqst *rqstp,
61		struct nfsd4_compound_state *cstate,
62		struct nfsd4_layoutreturn *lrp);
63__be32 nfsd4_return_client_layouts(struct svc_rqst *rqstp,
64		struct nfsd4_compound_state *cstate,
65		struct nfsd4_layoutreturn *lrp);
66int nfsd4_set_deviceid(struct nfsd4_deviceid *id, const struct svc_fh *fhp,
67		u32 device_generation);
68struct nfsd4_deviceid_map *nfsd4_find_devid_map(int idx);
69#endif /* CONFIG_NFSD_V4 */
70
71#ifdef CONFIG_NFSD_PNFS
72void nfsd4_setup_layout_type(struct svc_export *exp);
73void nfsd4_return_all_client_layouts(struct nfs4_client *);
74void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
75		struct nfs4_file *fp);
76void nfsd4_close_layout(struct nfs4_layout_stateid *ls);
77int nfsd4_init_pnfs(void);
78void nfsd4_exit_pnfs(void);
79#else
80struct nfs4_client;
81struct nfs4_file;
82struct nfs4_layout_stateid;
83
84static inline void nfsd4_setup_layout_type(struct svc_export *exp)
85{
86}
87
88static inline void nfsd4_return_all_client_layouts(struct nfs4_client *clp)
89{
90}
91static inline void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
92		struct nfs4_file *fp)
93{
94}
95static inline void nfsd4_close_layout(struct nfs4_layout_stateid *ls)
96{
97}
98static inline void nfsd4_exit_pnfs(void)
99{
100}
101static inline int nfsd4_init_pnfs(void)
102{
103	return 0;
104}
105#endif /* CONFIG_NFSD_PNFS */
106#endif /* _FS_NFSD_PNFS_H */
107