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
45 /* The flags that may vary depending on security flavor: */
46 #define NFSEXP_SECINFO_FLAGS 0
54 #define MAX_FS_LOCATIONS 128
56 struct nfsd4_fs_location {
57 char *hosts; /* colon separated list of hosts */
58 char *path; /* slash separated list of path components */
61 struct nfsd4_fs_locations {
62 uint32_t locations_count;
63 struct nfsd4_fs_location *locations;
64 /* If we're not actually serving this data ourselves (only providing a
65 * list of replicas that do serve it) then we set "migrated": */
70 * We keep an array of pseudoflavors with the export, in order from most
71 * to least preferred. For the forseeable future, we don't expect more
72 * than the eight pseudoflavors null, unix, krb5, krb5i, krb5p, skpm3,
73 * spkm3i, and spkm3p (and using all 8 at once should be rare).
75 #define MAX_SECINFO_LIST 8
77 struct exp_flavor_info {
84 struct auth_domain * ex_client;
86 struct vfsmount * ex_mnt;
87 struct dentry * ex_dentry;
92 unsigned char * ex_uuid; /* 16 byte fsid */
93 struct nfsd4_fs_locations ex_fslocs;
95 struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST];
98 /* an "export key" (expkey) maps a filehandlefragement to an
99 * svc_export for a given client. There can be several per export,
100 * for the different fsid types.
105 struct auth_domain * ek_client;
109 struct vfsmount * ek_mnt;
110 struct dentry * ek_dentry;
113 #define EX_SECURE(exp) (!((exp)->ex_flags & NFSEXP_INSECURE_PORT))
114 #define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC))
115 #define EX_RDONLY(exp) ((exp)->ex_flags & NFSEXP_READONLY)
116 #define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE)
117 #define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
119 __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp);
122 * Function declarations
124 void nfsd_export_init(void);
125 void nfsd_export_shutdown(void);
126 void nfsd_export_flush(void);
127 void exp_readlock(void);
128 void exp_readunlock(void);
129 struct svc_export * exp_get_by_name(struct auth_domain *clp,
130 struct vfsmount *mnt,
131 struct dentry *dentry,
132 struct cache_req *reqp);
133 struct svc_export * rqst_exp_get_by_name(struct svc_rqst *,
136 struct svc_export * exp_parent(struct auth_domain *clp,
137 struct vfsmount *mnt,
138 struct dentry *dentry,
139 struct cache_req *reqp);
140 struct svc_export * rqst_exp_parent(struct svc_rqst *,
141 struct vfsmount *mnt,
142 struct dentry *dentry);
143 int exp_rootfh(struct auth_domain *,
144 char *path, struct knfsd_fh *, int maxsize);
145 __be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
146 __be32 nfserrno(int errno);
148 extern struct cache_detail svc_export_cache;
150 static inline void exp_put(struct svc_export *exp)
152 cache_put(&exp->h, &svc_export_cache);
155 static inline void exp_get(struct svc_export *exp)
159 extern struct svc_export *
160 exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,
161 struct cache_req *reqp);
162 struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
164 #endif /* __KERNEL__ */
166 #endif /* NFSD_EXPORT_H */