xref: /linux/fs/nfsd/pnfs.h (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)
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 
nfsd4_setup_layout_type(struct svc_export * exp)84 static inline void nfsd4_setup_layout_type(struct svc_export *exp)
85 {
86 }
87 
nfsd4_return_all_client_layouts(struct nfs4_client * clp)88 static inline void nfsd4_return_all_client_layouts(struct nfs4_client *clp)
89 {
90 }
nfsd4_return_all_file_layouts(struct nfs4_client * clp,struct nfs4_file * fp)91 static inline void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
92 		struct nfs4_file *fp)
93 {
94 }
nfsd4_close_layout(struct nfs4_layout_stateid * ls)95 static inline void nfsd4_close_layout(struct nfs4_layout_stateid *ls)
96 {
97 }
nfsd4_exit_pnfs(void)98 static inline void nfsd4_exit_pnfs(void)
99 {
100 }
nfsd4_init_pnfs(void)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