1/*
  2 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
  3 */
  4#ifndef NFSD_EXPORT_H
  5#define NFSD_EXPORT_H
  6
  7#include <linux/sunrpc/cache.h>
  8#include <uapi/linux/nfsd/export.h>
  9#include <linux/nfs4.h>
 10
 11struct knfsd_fh;
 12struct svc_fh;
 13struct svc_rqst;
 14
 15/*
 16 * FS Locations
 17 */
 18
 19#define MAX_FS_LOCATIONS	128
 20
 21struct nfsd4_fs_location {
 22	char *hosts; /* colon separated list of hosts */
 23	char *path;  /* slash separated list of path components */
 24};
 25
 26struct nfsd4_fs_locations {
 27	uint32_t locations_count;
 28	struct nfsd4_fs_location *locations;
 29/* If we're not actually serving this data ourselves (only providing a
 30 * list of replicas that do serve it) then we set "migrated": */
 31	int migrated;
 32};
 33
 34/*
 35 * We keep an array of pseudoflavors with the export, in order from most
 36 * to least preferred.  For the foreseeable future, we don't expect more
 37 * than the eight pseudoflavors null, unix, krb5, krb5i, krb5p, skpm3,
 38 * spkm3i, and spkm3p (and using all 8 at once should be rare).
 39 */
 40#define MAX_SECINFO_LIST	8
 41#define EX_UUID_LEN		16
 42
 43struct exp_flavor_info {
 44	u32	pseudoflavor;
 45	u32	flags;
 46};
 47
 48struct svc_export {
 49	struct cache_head	h;
 50	struct auth_domain *	ex_client;
 51	int			ex_flags;
 52	struct path		ex_path;
 53	kuid_t			ex_anon_uid;
 54	kgid_t			ex_anon_gid;
 55	int			ex_fsid;
 56	unsigned char *		ex_uuid; /* 16 byte fsid */
 57	struct nfsd4_fs_locations ex_fslocs;
 58	uint32_t		ex_nflavors;
 59	struct exp_flavor_info	ex_flavors[MAX_SECINFO_LIST];
 60	enum pnfs_layouttype	ex_layout_type;
 61	struct nfsd4_deviceid_map *ex_devid_map;
 62	struct cache_detail	*cd;
 63};
 64
 65/* an "export key" (expkey) maps a filehandlefragement to an
 66 * svc_export for a given client.  There can be several per export,
 67 * for the different fsid types.
 68 */
 69struct svc_expkey {
 70	struct cache_head	h;
 71
 72	struct auth_domain *	ek_client;
 73	int			ek_fsidtype;
 74	u32			ek_fsid[6];
 75
 76	struct path		ek_path;
 77};
 78
 79#define EX_ISSYNC(exp)		(!((exp)->ex_flags & NFSEXP_ASYNC))
 80#define EX_NOHIDE(exp)		((exp)->ex_flags & NFSEXP_NOHIDE)
 81#define EX_WGATHER(exp)		((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
 82
 83int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp);
 84__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp);
 85
 86/*
 87 * Function declarations
 88 */
 89int			nfsd_export_init(struct net *);
 90void			nfsd_export_shutdown(struct net *);
 91void			nfsd_export_flush(struct net *);
 92struct svc_export *	rqst_exp_get_by_name(struct svc_rqst *,
 93					     struct path *);
 94struct svc_export *	rqst_exp_parent(struct svc_rqst *,
 95					struct path *);
 96struct svc_export *	rqst_find_fsidzero_export(struct svc_rqst *);
 97int			exp_rootfh(struct net *, struct auth_domain *,
 98					char *path, struct knfsd_fh *, int maxsize);
 99__be32			exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
100__be32			nfserrno(int errno);
101
102static inline void exp_put(struct svc_export *exp)
103{
104	cache_put(&exp->h, exp->cd);
105}
106
107static inline struct svc_export *exp_get(struct svc_export *exp)
108{
109	cache_get(&exp->h);
110	return exp;
111}
112struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
113
114#endif /* NFSD_EXPORT_H */