fs/nfsd/pnfs.h

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