1 /* SPDX-License-Identifier: GPL-2.0 */
8 #include <linux/sunrpc/cache.h>
9 #include <linux/percpu_counter.h>
10 #include <uapi/linux/nfsd/export.h>
11 #include <linux/nfs4.h>
21 #define MAX_FS_LOCATIONS 128
23 struct nfsd4_fs_location {
24 char *hosts; /* colon separated list of hosts */
25 char *path; /* slash separated list of path components */
28 struct 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": */
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).
42 #define MAX_SECINFO_LIST 8
43 #define EX_UUID_LEN 16
45 struct exp_flavor_info {
50 /* Per-export stats */
55 EXP_STATS_COUNTERS_NUM
60 struct percpu_counter counter[EXP_STATS_COUNTERS_NUM];
65 struct auth_domain * ex_client;
71 unsigned char * ex_uuid; /* 16 byte fsid */
72 struct nfsd4_fs_locations ex_fslocs;
74 struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST];
76 struct nfsd4_deviceid_map *ex_devid_map;
77 struct cache_detail *cd;
78 struct rcu_head ex_rcu;
79 struct export_stats ex_stats;
80 unsigned long ex_xprtsec_modes;
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.
90 struct auth_domain * ek_client;
95 struct rcu_head ek_rcu;
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)
102 int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp);
103 __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp);
106 * Function declarations
108 int nfsd_export_init(struct net *);
109 void nfsd_export_shutdown(struct net *);
110 void nfsd_export_flush(struct net *);
111 struct svc_export * rqst_exp_get_by_name(struct svc_rqst *,
113 struct svc_export * rqst_exp_parent(struct svc_rqst *,
115 struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *);
116 int 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 *);
120 static inline void exp_put(struct svc_export *exp)
122 cache_put(&exp->h, exp->cd);
125 static inline struct svc_export *exp_get(struct svc_export *exp)
130 struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
132 #endif /* NFSD_EXPORT_H */