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 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 */
66 struct 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
80 int 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 */
86 int nfsd_export_init(struct net *);
87 void nfsd_export_shutdown(struct net *);
88 void nfsd_export_flush(struct net *);
89 struct svc_export * rqst_exp_get_by_name(struct svc_rqst *,
90 struct path *);
91 struct svc_export * rqst_exp_parent(struct svc_rqst *,
92 struct path *);
93 struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *);
94 int 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
exp_put(struct svc_export * exp)99 static inline void exp_put(struct svc_export *exp)
100 {
101 cache_put(&exp->h, exp->cd);
102 }
103
exp_get(struct svc_export * exp)104 static inline struct svc_export *exp_get(struct svc_export *exp)
105 {
106 cache_get(&exp->h);
107 return exp;
108 }
109 struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
110
111 #endif /* NFSD_EXPORT_H */
112