Release 4.15 fs/nfsd/export.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * 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>
#include <linux/nfs4.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];
	
u32			ex_layout_types;
	
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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Neil Brown
21
87.50%
2
66.67%
Stanislav Kinsbursky
3
12.50%
1
33.33%
Total
24
100.00%
3
100.00%



static inline struct svc_export *exp_get(struct svc_export *exp)
{
	cache_get(&exp->h);
	return exp;
}
Contributors
Person
Tokens
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Commits
CommitProp
Andrew Morton
19
76.00%
1
50.00%
Kinglong Mee
6
24.00%
1
50.00%
Total
25
100.00%
2
100.00%

struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);

#endif /* NFSD_EXPORT_H */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
88
22.28%
3
6.98%
Neil Brown
78
19.75%
9
20.93%
J. Bruce Fields
54
13.67%
4
9.30%
Manoj Naik
41
10.38%
1
2.33%
Andy Adamson
38
9.62%
2
4.65%
Stanislav Kinsbursky
21
5.32%
4
9.30%
Andrew Morton
19
4.81%
1
2.33%
Christoph Hellwig
17
4.30%
3
6.98%
Kinglong Mee
11
2.78%
3
6.98%
Trond Myklebust
10
2.53%
1
2.33%
Jeff Layton
5
1.27%
2
4.65%
Al Viro
4
1.01%
4
9.30%
Jan Blunck
4
1.01%
2
4.65%
Eric W. Biedermann
2
0.51%
1
2.33%
Lucas De Marchi
1
0.25%
1
2.33%
David Howells
1
0.25%
1
2.33%
Greg Kroah-Hartman
1
0.25%
1
2.33%
Total
395
100.00%
43
100.00%
Directory: fs/nfsd

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