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