1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
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
;
82 /* an "export key" (expkey) maps a filehandlefragement to an
83 * svc_export for a given client. There can be several per export,
84 * for the different fsid types.
89 struct auth_domain
* ek_client
;
94 struct rcu_head ek_rcu
;
97 #define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC))
98 #define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE)
99 #define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
101 int nfsexp_flags(struct svc_rqst
*rqstp
, struct svc_export
*exp
);
102 __be32
check_nfsd_access(struct svc_export
*exp
, struct svc_rqst
*rqstp
);
105 * Function declarations
107 int nfsd_export_init(struct net
*);
108 void nfsd_export_shutdown(struct net
*);
109 void nfsd_export_flush(struct net
*);
110 struct svc_export
* rqst_exp_get_by_name(struct svc_rqst
*,
112 struct svc_export
* rqst_exp_parent(struct svc_rqst
*,
114 struct svc_export
* rqst_find_fsidzero_export(struct svc_rqst
*);
115 int exp_rootfh(struct net
*, struct auth_domain
*,
116 char *path
, struct knfsd_fh
*, int maxsize
);
117 __be32
exp_pseudoroot(struct svc_rqst
*, struct svc_fh
*);
118 __be32
nfserrno(int errno
);
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 */