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
  23         __be32 (*proc_getdeviceinfo)(struct super_block *sb,
  24                         struct nfs4_client *clp,
  25                         struct nfsd4_getdeviceinfo *gdevp);
  26         __be32 (*encode_getdeviceinfo)(struct xdr_stream *xdr,
  27                         struct nfsd4_getdeviceinfo *gdevp);
  28
  29         __be32 (*proc_layoutget)(struct inode *, const struct svc_fh *fhp,
  30                         struct nfsd4_layoutget *lgp);
  31         __be32 (*encode_layoutget)(struct xdr_stream *,
  32                         struct nfsd4_layoutget *lgp);
  33
  34         __be32 (*proc_layoutcommit)(struct inode *inode,
  35                         struct nfsd4_layoutcommit *lcp);
  36
  37         void (*fence_client)(struct nfs4_layout_stateid *ls);
  38 };
  39
  40 extern const struct nfsd4_layout_ops *nfsd4_layout_ops[];
  41 #ifdef CONFIG_NFSD_BLOCKLAYOUT
  42 extern const struct nfsd4_layout_ops bl_layout_ops;
  43 #endif
  44 #ifdef CONFIG_NFSD_SCSILAYOUT
  45 extern const struct nfsd4_layout_ops scsi_layout_ops;
  46 #endif
  47
  48 __be32 nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp,
  49                 struct nfsd4_compound_state *cstate, stateid_t *stateid,
  50                 bool create, u32 layout_type, struct nfs4_layout_stateid **lsp);
  51 __be32 nfsd4_insert_layout(struct nfsd4_layoutget *lgp,
  52                 struct nfs4_layout_stateid *ls);
  53 __be32 nfsd4_return_file_layouts(struct svc_rqst *rqstp,
  54                 struct nfsd4_compound_state *cstate,
  55                 struct nfsd4_layoutreturn *lrp);
  56 __be32 nfsd4_return_client_layouts(struct svc_rqst *rqstp,
  57                 struct nfsd4_compound_state *cstate,
  58                 struct nfsd4_layoutreturn *lrp);
  59 int nfsd4_set_deviceid(struct nfsd4_deviceid *id, const struct svc_fh *fhp,
  60                 u32 device_generation);
  61 struct nfsd4_deviceid_map *nfsd4_find_devid_map(int idx);
  62 #endif /* CONFIG_NFSD_V4 */
  63
  64 #ifdef CONFIG_NFSD_PNFS
  65 void nfsd4_setup_layout_type(struct svc_export *exp);
  66 void nfsd4_return_all_client_layouts(struct nfs4_client *);
  67 void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
  68                 struct nfs4_file *fp);
  69 int nfsd4_init_pnfs(void);
  70 void nfsd4_exit_pnfs(void);
  71 #else
  72 struct nfs4_client;
  73 struct nfs4_file;
  74
  75 static inline void nfsd4_setup_layout_type(struct svc_export *exp)
  76 {
  77 }
  78
  79 static inline void nfsd4_return_all_client_layouts(struct nfs4_client *clp)
  80 {
  81 }
  82 static inline void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
  83                 struct nfs4_file *fp)
  84 {
  85 }
  86 static inline void nfsd4_exit_pnfs(void)
  87 {
  88 }
  89 static inline int nfsd4_init_pnfs(void)
  90 {
  91         return 0;
  92 }
  93 #endif /* CONFIG_NFSD_PNFS */
  94 #endif /* _FS_NFSD_PNFS_H */