/* * include/linux/nfsd/export.h *  * Public declarations for NFS exports. The definitions for the * syscall interface are in nfsctl.h * * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> */ #ifndef NFSD_EXPORT_H#define NFSD_EXPORT_H #include <asm/types.h>#ifdef __KERNEL__# include <linux/types.h># include <linux/in.h>#endif /* * Important limits for the exports stuff. */#define NFSCLNT_IDMAX		1024#define NFSCLNT_ADDRMAX		16#define NFSCLNT_KEYMAX		32 /* * Export flags. */#define NFSEXP_READONLY		0x0001#define NFSEXP_INSECURE_PORT	0x0002#define NFSEXP_ROOTSQUASH	0x0004#define NFSEXP_ALLSQUASH	0x0008#define NFSEXP_ASYNC		0x0010#define NFSEXP_GATHERED_WRITES	0x0020/* 40 80 100 currently unused */#define NFSEXP_NOHIDE		0x0200#define NFSEXP_NOSUBTREECHECK	0x0400#define	NFSEXP_NOAUTHNLM	0x0800		/* Don't authenticate NLM requests - just trust */#define NFSEXP_MSNFS		0x1000	/* do silly things that MS clients expect */#define NFSEXP_FSID		0x2000#define	NFSEXP_CROSSMOUNT	0x4000#define	NFSEXP_NOACL		0x8000	/* reserved for possible ACL related use */#define NFSEXP_ALLFLAGS		0xFE3F  #ifdef __KERNEL__ /* * FS Locations */ #define MAX_FS_LOCATIONS	128 struct nfsd4_fs_location {	char *hosts; /* colon separated list of hosts */	char *path;  /* slash separated list of path components */}; struct nfsd4_fs_locations {	uint32_t locations_count;	struct nfsd4_fs_location *locations;/* If we're not actually serving this data ourselves (only providing a * list of replicas that do serve it) then we set "migrated": */	int migrated;}; struct svc_export {	struct cache_head	h;	struct auth_domain *	ex_client;	int			ex_flags;	struct vfsmount *	ex_mnt;	struct dentry *		ex_dentry;	char *			ex_path;	uid_t			ex_anon_uid;	gid_t			ex_anon_gid;	int			ex_fsid;	struct nfsd4_fs_locations ex_fslocs;}; /* an "export key" (expkey) maps a filehandlefragement to an * svc_export for a given client.  There can be two per export, one * for type 0 (dev/ino), one for type 1 (fsid) */struct svc_expkey {	struct cache_head	h; 	struct auth_domain *	ek_client;	int			ek_fsidtype;	u32			ek_fsid[3]; 	struct vfsmount *	ek_mnt;	struct dentry *		ek_dentry;}; #define EX_SECURE(exp)		(!((exp)->ex_flags & NFSEXP_INSECURE_PORT))#define EX_ISSYNC(exp)		(!((exp)->ex_flags & NFSEXP_ASYNC))#define EX_RDONLY(exp)		((exp)->ex_flags & NFSEXP_READONLY)#define EX_NOHIDE(exp)		((exp)->ex_flags & NFSEXP_NOHIDE)#define EX_WGATHER(exp)		((exp)->ex_flags & NFSEXP_GATHERED_WRITES)  /* * Function declarations */void			nfsd_export_init(void);void			nfsd_export_shutdown(void);void			nfsd_export_flush(void);void			exp_readlock(void);void			exp_readunlock(void);struct svc_export *	exp_get_by_name(struct auth_domain *clp,					struct vfsmount *mnt,					struct dentry *dentry,					struct cache_req *reqp);struct svc_export *	exp_parent(struct auth_domain *clp,				   struct vfsmount *mnt,				   struct dentry *dentry,				   struct cache_req *reqp);int			exp_rootfh(struct auth_domain *, 					char *path, struct knfsd_fh *, int maxsize);__be32			exp_pseudoroot(struct auth_domain *, struct svc_fh *fhp, struct cache_req *creq);__be32			nfserrno(int errno); extern struct cache_detail svc_export_cache; static inline void exp_put(struct svc_export *exp){	cache_put(&exp->h, &svc_export_cache);} static inline void exp_get(struct svc_export *exp){	cache_get(&exp->h);}extern struct svc_export *exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,	 struct cache_req *reqp); #endif /* __KERNEL__ */ #endif /* NFSD_EXPORT_H */