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