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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
11struct knfsd_fh;
12struct svc_fh;
13struct svc_rqst;
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#define EX_UUID_LEN 16
42
43struct exp_flavor_info {
44 u32 pseudoflavor;
45 u32 flags;
46};
47
48struct 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 enum pnfs_layouttype ex_layout_type;
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 */
69struct 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
83int 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 */
89int nfsd_export_init(struct net *);
90void nfsd_export_shutdown(struct net *);
91void nfsd_export_flush(struct net *);
92struct svc_export * rqst_exp_get_by_name(struct svc_rqst *,
93 struct path *);
94struct svc_export * rqst_exp_parent(struct svc_rqst *,
95 struct path *);
96struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *);
97int 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
102static inline void exp_put(struct svc_export *exp)
103{
104 cache_put(&exp->h, exp->cd);
105}
106
107static inline struct svc_export *exp_get(struct svc_export *exp)
108{
109 cache_get(&exp->h);
110 return exp;
111}
112struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
113
114#endif /* NFSD_EXPORT_H */
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
4 */
5#ifndef NFSD_EXPORT_H
6#define NFSD_EXPORT_H
7
8#include <linux/sunrpc/cache.h>
9#include <linux/percpu_counter.h>
10#include <uapi/linux/nfsd/export.h>
11#include <linux/nfs4.h>
12
13struct knfsd_fh;
14struct svc_fh;
15struct svc_rqst;
16
17/*
18 * FS Locations
19 */
20
21#define MAX_FS_LOCATIONS 128
22
23struct nfsd4_fs_location {
24 char *hosts; /* colon separated list of hosts */
25 char *path; /* slash separated list of path components */
26};
27
28struct nfsd4_fs_locations {
29 uint32_t locations_count;
30 struct nfsd4_fs_location *locations;
31/* If we're not actually serving this data ourselves (only providing a
32 * list of replicas that do serve it) then we set "migrated": */
33 int migrated;
34};
35
36/*
37 * We keep an array of pseudoflavors with the export, in order from most
38 * to least preferred. For the foreseeable future, we don't expect more
39 * than the eight pseudoflavors null, unix, krb5, krb5i, krb5p, skpm3,
40 * spkm3i, and spkm3p (and using all 8 at once should be rare).
41 */
42#define MAX_SECINFO_LIST 8
43#define EX_UUID_LEN 16
44
45struct exp_flavor_info {
46 u32 pseudoflavor;
47 u32 flags;
48};
49
50/* Per-export stats */
51enum {
52 EXP_STATS_FH_STALE,
53 EXP_STATS_IO_READ,
54 EXP_STATS_IO_WRITE,
55 EXP_STATS_COUNTERS_NUM
56};
57
58struct export_stats {
59 time64_t start_time;
60 struct percpu_counter counter[EXP_STATS_COUNTERS_NUM];
61};
62
63struct svc_export {
64 struct cache_head h;
65 struct auth_domain * ex_client;
66 int ex_flags;
67 int ex_fsid;
68 struct path ex_path;
69 kuid_t ex_anon_uid;
70 kgid_t ex_anon_gid;
71 unsigned char * ex_uuid; /* 16 byte fsid */
72 struct nfsd4_fs_locations ex_fslocs;
73 uint32_t ex_nflavors;
74 struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST];
75 u32 ex_layout_types;
76 struct nfsd4_deviceid_map *ex_devid_map;
77 struct cache_detail *cd;
78 struct rcu_head ex_rcu;
79 unsigned long ex_xprtsec_modes;
80 struct export_stats *ex_stats;
81};
82
83/* an "export key" (expkey) maps a filehandlefragement to an
84 * svc_export for a given client. There can be several per export,
85 * for the different fsid types.
86 */
87struct svc_expkey {
88 struct cache_head h;
89
90 struct auth_domain * ek_client;
91 int ek_fsidtype;
92 u32 ek_fsid[6];
93
94 struct path ek_path;
95 struct rcu_head ek_rcu;
96};
97
98#define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC))
99#define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE)
100#define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
101
102struct svc_cred;
103int nfsexp_flags(struct svc_cred *cred, struct svc_export *exp);
104__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp,
105 bool may_bypass_gss);
106
107/*
108 * Function declarations
109 */
110int nfsd_export_init(struct net *);
111void nfsd_export_shutdown(struct net *);
112void nfsd_export_flush(struct net *);
113struct svc_export * rqst_exp_get_by_name(struct svc_rqst *,
114 struct path *);
115struct svc_export * rqst_exp_parent(struct svc_rqst *,
116 struct path *);
117struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *);
118int exp_rootfh(struct net *, struct auth_domain *,
119 char *path, struct knfsd_fh *, int maxsize);
120__be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
121
122static inline void exp_put(struct svc_export *exp)
123{
124 cache_put(&exp->h, exp->cd);
125}
126
127static inline struct svc_export *exp_get(struct svc_export *exp)
128{
129 cache_get(&exp->h);
130 return exp;
131}
132struct svc_export *rqst_exp_find(struct cache_req *reqp, struct net *net,
133 struct auth_domain *cl, struct auth_domain *gsscl,
134 int fsid_type, u32 *fsidv);
135
136#endif /* NFSD_EXPORT_H */