1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun #ifndef NFSD_EXPORT_H
6*4882a593Smuzhiyun #define NFSD_EXPORT_H
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/sunrpc/cache.h>
9*4882a593Smuzhiyun #include <uapi/linux/nfsd/export.h>
10*4882a593Smuzhiyun #include <linux/nfs4.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun struct knfsd_fh;
13*4882a593Smuzhiyun struct svc_fh;
14*4882a593Smuzhiyun struct svc_rqst;
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun /*
17*4882a593Smuzhiyun * FS Locations
18*4882a593Smuzhiyun */
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #define MAX_FS_LOCATIONS 128
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun struct nfsd4_fs_location {
23*4882a593Smuzhiyun char *hosts; /* colon separated list of hosts */
24*4882a593Smuzhiyun char *path; /* slash separated list of path components */
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun struct nfsd4_fs_locations {
28*4882a593Smuzhiyun uint32_t locations_count;
29*4882a593Smuzhiyun struct nfsd4_fs_location *locations;
30*4882a593Smuzhiyun /* If we're not actually serving this data ourselves (only providing a
31*4882a593Smuzhiyun * list of replicas that do serve it) then we set "migrated": */
32*4882a593Smuzhiyun int migrated;
33*4882a593Smuzhiyun };
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun /*
36*4882a593Smuzhiyun * We keep an array of pseudoflavors with the export, in order from most
37*4882a593Smuzhiyun * to least preferred. For the foreseeable future, we don't expect more
38*4882a593Smuzhiyun * than the eight pseudoflavors null, unix, krb5, krb5i, krb5p, skpm3,
39*4882a593Smuzhiyun * spkm3i, and spkm3p (and using all 8 at once should be rare).
40*4882a593Smuzhiyun */
41*4882a593Smuzhiyun #define MAX_SECINFO_LIST 8
42*4882a593Smuzhiyun #define EX_UUID_LEN 16
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun struct exp_flavor_info {
45*4882a593Smuzhiyun u32 pseudoflavor;
46*4882a593Smuzhiyun u32 flags;
47*4882a593Smuzhiyun };
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun struct svc_export {
50*4882a593Smuzhiyun struct cache_head h;
51*4882a593Smuzhiyun struct auth_domain * ex_client;
52*4882a593Smuzhiyun int ex_flags;
53*4882a593Smuzhiyun struct path ex_path;
54*4882a593Smuzhiyun kuid_t ex_anon_uid;
55*4882a593Smuzhiyun kgid_t ex_anon_gid;
56*4882a593Smuzhiyun int ex_fsid;
57*4882a593Smuzhiyun unsigned char * ex_uuid; /* 16 byte fsid */
58*4882a593Smuzhiyun struct nfsd4_fs_locations ex_fslocs;
59*4882a593Smuzhiyun uint32_t ex_nflavors;
60*4882a593Smuzhiyun struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST];
61*4882a593Smuzhiyun u32 ex_layout_types;
62*4882a593Smuzhiyun struct nfsd4_deviceid_map *ex_devid_map;
63*4882a593Smuzhiyun struct cache_detail *cd;
64*4882a593Smuzhiyun struct rcu_head ex_rcu;
65*4882a593Smuzhiyun };
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun /* an "export key" (expkey) maps a filehandlefragement to an
68*4882a593Smuzhiyun * svc_export for a given client. There can be several per export,
69*4882a593Smuzhiyun * for the different fsid types.
70*4882a593Smuzhiyun */
71*4882a593Smuzhiyun struct svc_expkey {
72*4882a593Smuzhiyun struct cache_head h;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun struct auth_domain * ek_client;
75*4882a593Smuzhiyun int ek_fsidtype;
76*4882a593Smuzhiyun u32 ek_fsid[6];
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun struct path ek_path;
79*4882a593Smuzhiyun struct rcu_head ek_rcu;
80*4882a593Smuzhiyun };
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun #define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC))
83*4882a593Smuzhiyun #define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE)
84*4882a593Smuzhiyun #define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp);
87*4882a593Smuzhiyun __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp);
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun /*
90*4882a593Smuzhiyun * Function declarations
91*4882a593Smuzhiyun */
92*4882a593Smuzhiyun int nfsd_export_init(struct net *);
93*4882a593Smuzhiyun void nfsd_export_shutdown(struct net *);
94*4882a593Smuzhiyun void nfsd_export_flush(struct net *);
95*4882a593Smuzhiyun struct svc_export * rqst_exp_get_by_name(struct svc_rqst *,
96*4882a593Smuzhiyun struct path *);
97*4882a593Smuzhiyun struct svc_export * rqst_exp_parent(struct svc_rqst *,
98*4882a593Smuzhiyun struct path *);
99*4882a593Smuzhiyun struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *);
100*4882a593Smuzhiyun int exp_rootfh(struct net *, struct auth_domain *,
101*4882a593Smuzhiyun char *path, struct knfsd_fh *, int maxsize);
102*4882a593Smuzhiyun __be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
103*4882a593Smuzhiyun __be32 nfserrno(int errno);
104*4882a593Smuzhiyun
exp_put(struct svc_export * exp)105*4882a593Smuzhiyun static inline void exp_put(struct svc_export *exp)
106*4882a593Smuzhiyun {
107*4882a593Smuzhiyun cache_put(&exp->h, exp->cd);
108*4882a593Smuzhiyun }
109*4882a593Smuzhiyun
exp_get(struct svc_export * exp)110*4882a593Smuzhiyun static inline struct svc_export *exp_get(struct svc_export *exp)
111*4882a593Smuzhiyun {
112*4882a593Smuzhiyun cache_get(&exp->h);
113*4882a593Smuzhiyun return exp;
114*4882a593Smuzhiyun }
115*4882a593Smuzhiyun struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun #endif /* NFSD_EXPORT_H */
118