[linux-2.6-block.git] / fs / nfsd / export.h

/*
 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
 */
#ifndef NFSD_EXPORT_H
#define NFSD_EXPORT_H

#include <linux/sunrpc/cache.h>
#include <uapi/linux/nfsd/export.h>

struct knfsd_fh;
struct svc_fh;
struct svc_rqst;

/*
 * 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;
};

/*
 * We keep an array of pseudoflavors with the export, in order from most
 * to least preferred.  For the foreseeable future, we don't expect more
 * than the eight pseudoflavors null, unix, krb5, krb5i, krb5p, skpm3,
 * spkm3i, and spkm3p (and using all 8 at once should be rare).
 */
#define MAX_SECINFO_LIST	8
#define EX_UUID_LEN		16

struct exp_flavor_info {
	u32	pseudoflavor;
	u32	flags;
};

struct svc_export {
	struct cache_head	h;
	struct auth_domain *	ex_client;
	int			ex_flags;
	struct path		ex_path;
	kuid_t			ex_anon_uid;
	kgid_t			ex_anon_gid;
	int			ex_fsid;
	unsigned char *		ex_uuid; /* 16 byte fsid */
	struct nfsd4_fs_locations ex_fslocs;
	uint32_t		ex_nflavors;
	struct exp_flavor_info	ex_flavors[MAX_SECINFO_LIST];
	enum pnfs_layouttype	ex_layout_type;
	struct nfsd4_deviceid_map *ex_devid_map;
	struct cache_detail	*cd;
};

/* an "export key" (expkey) maps a filehandlefragement to an
 * svc_export for a given client.  There can be several per export,
 * for the different fsid types.
 */
struct svc_expkey {
	struct cache_head	h;

	struct auth_domain *	ek_client;
	int			ek_fsidtype;
	u32			ek_fsid[6];

	struct path		ek_path;
};

#define EX_ISSYNC(exp)		(!((exp)->ex_flags & NFSEXP_ASYNC))
#define EX_NOHIDE(exp)		((exp)->ex_flags & NFSEXP_NOHIDE)
#define EX_WGATHER(exp)		((exp)->ex_flags & NFSEXP_GATHERED_WRITES)

int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp);
__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp);

/*
 * Function declarations
 */
int			nfsd_export_init(struct net *);
void			nfsd_export_shutdown(struct net *);
void			nfsd_export_flush(struct net *);
struct svc_export *	rqst_exp_get_by_name(struct svc_rqst *,
					     struct path *);
struct svc_export *	rqst_exp_parent(struct svc_rqst *,
					struct path *);
struct svc_export *	rqst_find_fsidzero_export(struct svc_rqst *);
int			exp_rootfh(struct net *, struct auth_domain *,
					char *path, struct knfsd_fh *, int maxsize);
__be32			exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
__be32			nfserrno(int errno);

static inline void exp_put(struct svc_export *exp)
{
	cache_put(&exp->h, exp->cd);
}

static inline struct svc_export *exp_get(struct svc_export *exp)
{
	cache_get(&exp->h);
	return exp;
}
struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);

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