2 * include/linux/nfsd/export.h
4 * Public declarations for NFS exports. The definitions for the
5 * syscall interface are in nfsctl.h
7 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
13 #include <asm/types.h>
15 # include <linux/types.h>
16 # include <linux/in.h>
20 * Important limits for the exports stuff.
22 #define NFSCLNT_IDMAX 1024
23 #define NFSCLNT_ADDRMAX 16
24 #define NFSCLNT_KEYMAX 32
29 #define NFSEXP_READONLY 0x0001
30 #define NFSEXP_INSECURE_PORT 0x0002
31 #define NFSEXP_ROOTSQUASH 0x0004
32 #define NFSEXP_ALLSQUASH 0x0008
33 #define NFSEXP_ASYNC 0x0010
34 #define NFSEXP_GATHERED_WRITES 0x0020
35 /* 40 80 100 currently unused */
36 #define NFSEXP_NOHIDE 0x0200
37 #define NFSEXP_NOSUBTREECHECK 0x0400
38 #define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */
39 #define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect */
40 #define NFSEXP_FSID 0x2000
41 #define NFSEXP_CROSSMOUNT 0x4000
42 #define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */
43 #define NFSEXP_ALLFLAGS 0xFE3F
52 #define MAX_FS_LOCATIONS 128
54 struct nfsd4_fs_location {
55 char *hosts; /* colon separated list of hosts */
56 char *path; /* slash separated list of path components */
59 struct nfsd4_fs_locations {
60 uint32_t locations_count;
61 struct nfsd4_fs_location *locations;
62 /* If we're not actually serving this data ourselves (only providing a
63 * list of replicas that do serve it) then we set "migrated": */
69 struct auth_domain * ex_client;
71 struct vfsmount * ex_mnt;
72 struct dentry * ex_dentry;
77 struct nfsd4_fs_locations ex_fslocs;
80 /* an "export key" (expkey) maps a filehandlefragement to an
81 * svc_export for a given client. There can be two per export, one
82 * for type 0 (dev/ino), one for type 1 (fsid)
87 struct auth_domain * ek_client;
91 struct vfsmount * ek_mnt;
92 struct dentry * ek_dentry;
95 #define EX_SECURE(exp) (!((exp)->ex_flags & NFSEXP_INSECURE_PORT))
96 #define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC))
97 #define EX_RDONLY(exp) ((exp)->ex_flags & NFSEXP_READONLY)
98 #define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE)
99 #define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
103 * Function declarations
105 void nfsd_export_init(void);
106 void nfsd_export_shutdown(void);
107 void nfsd_export_flush(void);
108 void exp_readlock(void);
109 void exp_readunlock(void);
110 struct svc_export * exp_get_by_name(struct auth_domain *clp,
111 struct vfsmount *mnt,
112 struct dentry *dentry,
113 struct cache_req *reqp);
114 struct svc_export * exp_parent(struct auth_domain *clp,
115 struct vfsmount *mnt,
116 struct dentry *dentry,
117 struct cache_req *reqp);
118 int exp_rootfh(struct auth_domain *,
119 char *path, struct knfsd_fh *, int maxsize);
120 __be32 exp_pseudoroot(struct auth_domain *, struct svc_fh *fhp, struct cache_req *creq);
121 __be32 nfserrno(int errno);
123 extern struct cache_detail svc_export_cache;
125 static inline void exp_put(struct svc_export *exp)
127 cache_put(&exp->h, &svc_export_cache);
130 static inline void exp_get(struct svc_export *exp)
134 extern struct svc_export *
135 exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,
136 struct cache_req *reqp);
138 #endif /* __KERNEL__ */
140 #endif /* NFSD_EXPORT_H */