Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * include/linux/nfsd/export.h | |
3 | * | |
4 | * Public declarations for NFS exports. The definitions for the | |
5 | * syscall interface are in nfsctl.h | |
6 | * | |
7 | * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> | |
8 | */ | |
9 | ||
10 | #ifndef NFSD_EXPORT_H | |
11 | #define NFSD_EXPORT_H | |
12 | ||
13 | #include <asm/types.h> | |
14 | #ifdef __KERNEL__ | |
15 | # include <linux/types.h> | |
16 | # include <linux/in.h> | |
17 | #endif | |
18 | ||
19 | /* | |
20 | * Important limits for the exports stuff. | |
21 | */ | |
22 | #define NFSCLNT_IDMAX 1024 | |
23 | #define NFSCLNT_ADDRMAX 16 | |
24 | #define NFSCLNT_KEYMAX 32 | |
25 | ||
26 | /* | |
27 | * Export flags. | |
28 | */ | |
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 | |
44 | ||
45 | ||
46 | #ifdef __KERNEL__ | |
47 | ||
48 | struct svc_export { | |
49 | struct cache_head h; | |
50 | struct auth_domain * ex_client; | |
51 | int ex_flags; | |
52 | struct vfsmount * ex_mnt; | |
53 | struct dentry * ex_dentry; | |
54 | uid_t ex_anon_uid; | |
55 | gid_t ex_anon_gid; | |
56 | int ex_fsid; | |
57 | }; | |
58 | ||
59 | /* an "export key" (expkey) maps a filehandlefragement to an | |
60 | * svc_export for a given client. There can be two per export, one | |
61 | * for type 0 (dev/ino), one for type 1 (fsid) | |
62 | */ | |
63 | struct svc_expkey { | |
64 | struct cache_head h; | |
65 | ||
66 | struct auth_domain * ek_client; | |
67 | int ek_fsidtype; | |
68 | u32 ek_fsid[3]; | |
69 | ||
70 | struct svc_export * ek_export; | |
71 | }; | |
72 | ||
73 | #define EX_SECURE(exp) (!((exp)->ex_flags & NFSEXP_INSECURE_PORT)) | |
74 | #define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC)) | |
75 | #define EX_RDONLY(exp) ((exp)->ex_flags & NFSEXP_READONLY) | |
76 | #define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE) | |
77 | #define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES) | |
78 | ||
79 | ||
80 | /* | |
81 | * Function declarations | |
82 | */ | |
83 | void nfsd_export_init(void); | |
84 | void nfsd_export_shutdown(void); | |
85 | void nfsd_export_flush(void); | |
86 | void exp_readlock(void); | |
87 | void exp_readunlock(void); | |
88 | struct svc_expkey * exp_find_key(struct auth_domain *clp, | |
89 | int fsid_type, u32 *fsidv, | |
90 | struct cache_req *reqp); | |
91 | struct svc_export * exp_get_by_name(struct auth_domain *clp, | |
92 | struct vfsmount *mnt, | |
93 | struct dentry *dentry, | |
94 | struct cache_req *reqp); | |
95 | struct svc_export * exp_parent(struct auth_domain *clp, | |
96 | struct vfsmount *mnt, | |
97 | struct dentry *dentry, | |
98 | struct cache_req *reqp); | |
99 | int exp_rootfh(struct auth_domain *, | |
100 | char *path, struct knfsd_fh *, int maxsize); | |
101 | int exp_pseudoroot(struct auth_domain *, struct svc_fh *fhp, struct cache_req *creq); | |
102 | int nfserrno(int errno); | |
103 | ||
104 | extern void expkey_put(struct cache_head *item, struct cache_detail *cd); | |
105 | extern void svc_export_put(struct cache_head *item, struct cache_detail *cd); | |
106 | extern struct cache_detail svc_export_cache, svc_expkey_cache; | |
107 | ||
108 | static inline void exp_put(struct svc_export *exp) | |
109 | { | |
110 | svc_export_put(&exp->h, &svc_export_cache); | |
111 | } | |
112 | ||
113 | static inline void exp_get(struct svc_export *exp) | |
114 | { | |
115 | cache_get(&exp->h); | |
116 | } | |
117 | static inline struct svc_export * | |
118 | exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv, | |
119 | struct cache_req *reqp) | |
120 | { | |
121 | struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp); | |
122 | if (ek && !IS_ERR(ek)) { | |
123 | struct svc_export *exp = ek->ek_export; | |
124 | int err; | |
125 | exp_get(exp); | |
126 | expkey_put(&ek->h, &svc_expkey_cache); | |
127 | if ((err = cache_check(&svc_export_cache, &exp->h, reqp))) | |
128 | exp = ERR_PTR(err); | |
129 | return exp; | |
130 | } else | |
131 | return ERR_PTR(PTR_ERR(ek)); | |
132 | } | |
133 | ||
134 | #endif /* __KERNEL__ */ | |
135 | ||
136 | #endif /* NFSD_EXPORT_H */ | |
137 |