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
11 struct knfsd_fh;
12 struct svc_fh;
13 struct svc_rqst;
14
15 /*
16 * FS Locations
17 */
18
19 #define MAX_FS_LOCATIONS 128
20
21 struct nfsd4_fs_location {
22 char *hosts; /* colon separated list of hosts */
23 char *path; /* slash separated list of path components */
24 };
25
26 struct 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
43 struct exp_flavor_info {
44 u32 pseudoflavor;
45 u32 flags;
46 };
47
48 struct 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 u32 ex_layout_types;
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 */
69 struct 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
83 int 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 */
89 int nfsd_export_init(struct net *);
90 void nfsd_export_shutdown(struct net *);
91 void nfsd_export_flush(struct net *);
92 struct svc_export * rqst_exp_get_by_name(struct svc_rqst *,
93 struct path *);
94 struct svc_export * rqst_exp_parent(struct svc_rqst *,
95 struct path *);
96 struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *);
97 int 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
exp_put(struct svc_export * exp)102 static inline void exp_put(struct svc_export *exp)
103 {
104 cache_put(&exp->h, exp->cd);
105 }
106
exp_get(struct svc_export * exp)107 static inline struct svc_export *exp_get(struct svc_export *exp)
108 {
109 cache_get(&exp->h);
110 return exp;
111 }
112 struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
113
114 #endif /* NFSD_EXPORT_H */
115