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			const struct nfsd4_getdeviceinfo *gdevp);
 31
 32	__be32 (*proc_layoutget)(struct svc_rqst *rqstp, struct inode *inode,
 33			const struct svc_fh *fhp, 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 svc_rqst *rqstp,
 39			struct nfsd4_layoutcommit *lcp);
 40
 41	void (*fence_client)(struct nfs4_layout_stateid *ls,
 42			     struct nfsd_file *file);
 43};
 44
 45extern const struct nfsd4_layout_ops *nfsd4_layout_ops[];
 46#ifdef CONFIG_NFSD_BLOCKLAYOUT
 47extern const struct nfsd4_layout_ops bl_layout_ops;
 48#endif
 49#ifdef CONFIG_NFSD_SCSILAYOUT
 50extern const struct nfsd4_layout_ops scsi_layout_ops;
 51#endif
 52#ifdef CONFIG_NFSD_FLEXFILELAYOUT
 53extern const struct nfsd4_layout_ops ff_layout_ops;
 54#endif
 55
 56__be32 nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp,
 57		struct nfsd4_compound_state *cstate, stateid_t *stateid,
 58		bool create, u32 layout_type, struct nfs4_layout_stateid **lsp);
 59__be32 nfsd4_insert_layout(struct nfsd4_layoutget *lgp,
 60		struct nfs4_layout_stateid *ls);
 61__be32 nfsd4_return_file_layouts(struct svc_rqst *rqstp,
 62		struct nfsd4_compound_state *cstate,
 63		struct nfsd4_layoutreturn *lrp);
 64__be32 nfsd4_return_client_layouts(struct svc_rqst *rqstp,
 65		struct nfsd4_compound_state *cstate,
 66		struct nfsd4_layoutreturn *lrp);
 67int nfsd4_set_deviceid(struct nfsd4_deviceid *id, const struct svc_fh *fhp,
 68		u32 device_generation);
 69struct nfsd4_deviceid_map *nfsd4_find_devid_map(int idx);
 70#endif /* CONFIG_NFSD_V4 */
 71
 72#ifdef CONFIG_NFSD_PNFS
 73void nfsd4_setup_layout_type(struct svc_export *exp);
 74void nfsd4_return_all_client_layouts(struct nfs4_client *);
 75void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
 76		struct nfs4_file *fp);
 77void nfsd4_close_layout(struct nfs4_layout_stateid *ls);
 78int nfsd4_init_pnfs(void);
 79void nfsd4_exit_pnfs(void);
 80#else
 81struct nfs4_client;
 82struct nfs4_file;
 83struct nfs4_layout_stateid;
 84
 85static inline void nfsd4_setup_layout_type(struct svc_export *exp)
 86{
 87}
 88
 89static inline void nfsd4_return_all_client_layouts(struct nfs4_client *clp)
 90{
 91}
 92static inline void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
 93		struct nfs4_file *fp)
 94{
 95}
 96static inline void nfsd4_close_layout(struct nfs4_layout_stateid *ls)
 97{
 98}
 99static inline void nfsd4_exit_pnfs(void)
100{
101}
102static inline int nfsd4_init_pnfs(void)
103{
104	return 0;
105}
106#endif /* CONFIG_NFSD_PNFS */
107#endif /* _FS_NFSD_PNFS_H */