LXR linux/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
  12struct xdr_stream;
  13
  14struct nfsd4_deviceid_map {
  15        struct list_head        hash;
  16        u64                     idx;
  17        int                     fsid_type;
  18        u32                     fsid[];
  19};
  20
  21struct 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                        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 *,
  35                        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};
  42
  43extern const struct nfsd4_layout_ops *nfsd4_layout_ops[];
  44#ifdef CONFIG_NFSD_BLOCKLAYOUT
  45extern const struct nfsd4_layout_ops bl_layout_ops;
  46#endif
  47#ifdef CONFIG_NFSD_SCSILAYOUT
  48extern const struct nfsd4_layout_ops scsi_layout_ops;
  49#endif
  50#ifdef CONFIG_NFSD_FLEXFILELAYOUT
  51extern const struct nfsd4_layout_ops ff_layout_ops;
  52#endif
  53
  54__be32 nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp,
  55                struct nfsd4_compound_state *cstate, stateid_t *stateid,
  56                bool create, u32 layout_type, struct nfs4_layout_stateid **lsp);
  57__be32 nfsd4_insert_layout(struct nfsd4_layoutget *lgp,
  58                struct nfs4_layout_stateid *ls);
  59__be32 nfsd4_return_file_layouts(struct svc_rqst *rqstp,
  60                struct nfsd4_compound_state *cstate,
  61                struct nfsd4_layoutreturn *lrp);
  62__be32 nfsd4_return_client_layouts(struct svc_rqst *rqstp,
  63                struct nfsd4_compound_state *cstate,
  64                struct nfsd4_layoutreturn *lrp);
  65int nfsd4_set_deviceid(struct nfsd4_deviceid *id, const struct svc_fh *fhp,
  66                u32 device_generation);
  67struct nfsd4_deviceid_map *nfsd4_find_devid_map(int idx);
  68#endif /* CONFIG_NFSD_V4 */
  69
  70#ifdef CONFIG_NFSD_PNFS
  71void nfsd4_setup_layout_type(struct svc_export *exp);
  72void nfsd4_return_all_client_layouts(struct nfs4_client *);
  73void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
  74                struct nfs4_file *fp);
  75int nfsd4_init_pnfs(void);
  76void nfsd4_exit_pnfs(void);
  77#else
  78struct nfs4_client;
  79struct nfs4_file;
  80
  81static inline void nfsd4_setup_layout_type(struct svc_export *exp)
  82{
  83}
  84
  85static inline void nfsd4_return_all_client_layouts(struct nfs4_client *clp)
  86{
  87}
  88static inline void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
  89                struct nfs4_file *fp)
  90{
  91}
  92static inline void nfsd4_exit_pnfs(void)
  93{
  94}
  95static inline int nfsd4_init_pnfs(void)
  96{
  97        return 0;
  98}
  99#endif /* CONFIG_NFSD_PNFS */
 100#endif /* _FS_NFSD_PNFS_H */
 101