fs/nfsd/pnfs.h

   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 */