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1/*
2 * include/linux/nfsd/export.h
3 *
4 * Public declarations for NFS exports. The definitions for the
5 * syscall interface are in nfsctl.h
6 *
7 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
8 */
9#ifndef NFSD_EXPORT_H
10#define NFSD_EXPORT_H
11
12# include <linux/nfsd/nfsfh.h>
13#include <uapi/linux/nfsd/export.h>
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
42struct exp_flavor_info {
43 u32 pseudoflavor;
44 u32 flags;
45};
46
47struct svc_export {
48 struct cache_head h;
49 struct auth_domain * ex_client;
50 int ex_flags;
51 struct path ex_path;
52 uid_t ex_anon_uid;
53 gid_t ex_anon_gid;
54 int ex_fsid;
55 unsigned char * ex_uuid; /* 16 byte fsid */
56 struct nfsd4_fs_locations ex_fslocs;
57 int ex_nflavors;
58 struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST];
59 struct cache_detail *cd;
60};
61
62/* an "export key" (expkey) maps a filehandlefragement to an
63 * svc_export for a given client. There can be several per export,
64 * for the different fsid types.
65 */
66struct svc_expkey {
67 struct cache_head h;
68
69 struct auth_domain * ek_client;
70 int ek_fsidtype;
71 u32 ek_fsid[6];
72
73 struct path ek_path;
74};
75
76#define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC))
77#define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE)
78#define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
79
80int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp);
81__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp);
82
83/*
84 * Function declarations
85 */
86int nfsd_export_init(struct net *);
87void nfsd_export_shutdown(struct net *);
88void nfsd_export_flush(struct net *);
89struct svc_export * rqst_exp_get_by_name(struct svc_rqst *,
90 struct path *);
91struct svc_export * rqst_exp_parent(struct svc_rqst *,
92 struct path *);
93struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *);
94int exp_rootfh(struct net *, struct auth_domain *,
95 char *path, struct knfsd_fh *, int maxsize);
96__be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
97__be32 nfserrno(int errno);
98
99static inline void exp_put(struct svc_export *exp)
100{
101 cache_put(&exp->h, exp->cd);
102}
103
104static inline void exp_get(struct svc_export *exp)
105{
106 cache_get(&exp->h);
107}
108struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
109
110#endif /* NFSD_EXPORT_H */