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
12 struct xdr_stream;
13
14 struct nfsd4_deviceid_map {
15 struct list_head hash;
16 u64 idx;
17 int fsid_type;
18 u32 fsid[];
19 };
20
21 struct 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
44 extern const struct nfsd4_layout_ops *nfsd4_layout_ops[];
45 #ifdef CONFIG_NFSD_BLOCKLAYOUT
46 extern const struct nfsd4_layout_ops bl_layout_ops;
47 #endif
48 #ifdef CONFIG_NFSD_SCSILAYOUT
49 extern const struct nfsd4_layout_ops scsi_layout_ops;
50 #endif
51 #ifdef CONFIG_NFSD_FLEXFILELAYOUT
52 extern 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);
66 int nfsd4_set_deviceid(struct nfsd4_deviceid *id, const struct svc_fh *fhp,
67 u32 device_generation);
68 struct nfsd4_deviceid_map *nfsd4_find_devid_map(int idx);
69 #endif /* CONFIG_NFSD_V4 */
70
71 #ifdef CONFIG_NFSD_PNFS
72 void nfsd4_setup_layout_type(struct svc_export *exp);
73 void nfsd4_return_all_client_layouts(struct nfs4_client *);
74 void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
75 struct nfs4_file *fp);
76 void nfsd4_close_layout(struct nfs4_layout_stateid *ls);
77 int nfsd4_init_pnfs(void);
78 void nfsd4_exit_pnfs(void);
79 #else
80 struct nfs4_client;
81 struct nfs4_file;
82 struct nfs4_layout_stateid;
83
84 static inline void nfsd4_setup_layout_type(struct svc_export *exp)
85 {
86 }
87
88 static inline void nfsd4_return_all_client_layouts(struct nfs4_client *clp)
89 {
90 }
91 static inline void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
92 struct nfs4_file *fp)
93 {
94 }
95 static inline void nfsd4_close_layout(struct nfs4_layout_stateid *ls)
96 {
97 }
98 static inline void nfsd4_exit_pnfs(void)
99 {
100 }
101 static inline int nfsd4_init_pnfs(void)
102 {
103 return 0;
104 }
105 #endif /* CONFIG_NFSD_PNFS */
106 #endif /* _FS_NFSD_PNFS_H */
107
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