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 | ||
e677bfe4 AA |
45 | /* The flags that may vary depending on security flavor: */ |
46 | #define NFSEXP_SECINFO_FLAGS 0 | |
1da177e4 LT |
47 | |
48 | #ifdef __KERNEL__ | |
49 | ||
93346919 MN |
50 | /* |
51 | * FS Locations | |
52 | */ | |
53 | ||
54 | #define MAX_FS_LOCATIONS 128 | |
55 | ||
56 | struct nfsd4_fs_location { | |
57 | char *hosts; /* colon separated list of hosts */ | |
58 | char *path; /* slash separated list of path components */ | |
59 | }; | |
60 | ||
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": */ | |
66 | int migrated; | |
67 | }; | |
68 | ||
e677bfe4 AA |
69 | /* |
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). | |
74 | */ | |
75 | #define MAX_SECINFO_LIST 8 | |
76 | ||
77 | struct exp_flavor_info { | |
78 | u32 pseudoflavor; | |
79 | u32 flags; | |
80 | }; | |
81 | ||
1da177e4 LT |
82 | struct svc_export { |
83 | struct cache_head h; | |
84 | struct auth_domain * ex_client; | |
85 | int ex_flags; | |
86 | struct vfsmount * ex_mnt; | |
87 | struct dentry * ex_dentry; | |
b009a873 | 88 | char * ex_path; |
1da177e4 LT |
89 | uid_t ex_anon_uid; |
90 | gid_t ex_anon_gid; | |
91 | int ex_fsid; | |
af6a4e28 | 92 | unsigned char * ex_uuid; /* 16 byte fsid */ |
93346919 | 93 | struct nfsd4_fs_locations ex_fslocs; |
e677bfe4 AA |
94 | int ex_nflavors; |
95 | struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST]; | |
1da177e4 LT |
96 | }; |
97 | ||
98 | /* an "export key" (expkey) maps a filehandlefragement to an | |
af6a4e28 N |
99 | * svc_export for a given client. There can be several per export, |
100 | * for the different fsid types. | |
1da177e4 LT |
101 | */ |
102 | struct svc_expkey { | |
103 | struct cache_head h; | |
104 | ||
105 | struct auth_domain * ek_client; | |
106 | int ek_fsidtype; | |
af6a4e28 | 107 | u32 ek_fsid[6]; |
1da177e4 | 108 | |
eab7e2e6 N |
109 | struct vfsmount * ek_mnt; |
110 | struct dentry * ek_dentry; | |
1da177e4 LT |
111 | }; |
112 | ||
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) | |
118 | ||
119 | ||
120 | /* | |
121 | * Function declarations | |
122 | */ | |
123 | void nfsd_export_init(void); | |
124 | void nfsd_export_shutdown(void); | |
125 | void nfsd_export_flush(void); | |
126 | void exp_readlock(void); | |
127 | void exp_readunlock(void); | |
1da177e4 LT |
128 | struct svc_export * exp_get_by_name(struct auth_domain *clp, |
129 | struct vfsmount *mnt, | |
130 | struct dentry *dentry, | |
131 | struct cache_req *reqp); | |
0989a788 BF |
132 | struct svc_export * rqst_exp_get_by_name(struct svc_rqst *, |
133 | struct vfsmount *, | |
134 | struct dentry *); | |
1da177e4 LT |
135 | struct svc_export * exp_parent(struct auth_domain *clp, |
136 | struct vfsmount *mnt, | |
137 | struct dentry *dentry, | |
138 | struct cache_req *reqp); | |
0989a788 BF |
139 | struct svc_export * rqst_exp_parent(struct svc_rqst *, |
140 | struct vfsmount *mnt, | |
141 | struct dentry *dentry); | |
1da177e4 LT |
142 | int exp_rootfh(struct auth_domain *, |
143 | char *path, struct knfsd_fh *, int maxsize); | |
df547efb | 144 | __be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *); |
63f10311 | 145 | __be32 nfserrno(int errno); |
1da177e4 | 146 | |
74cae61a | 147 | extern struct cache_detail svc_export_cache; |
1da177e4 LT |
148 | |
149 | static inline void exp_put(struct svc_export *exp) | |
150 | { | |
baab935f | 151 | cache_put(&exp->h, &svc_export_cache); |
1da177e4 LT |
152 | } |
153 | ||
154 | static inline void exp_get(struct svc_export *exp) | |
155 | { | |
156 | cache_get(&exp->h); | |
157 | } | |
eab7e2e6 | 158 | extern struct svc_export * |
1da177e4 | 159 | exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv, |
eab7e2e6 | 160 | struct cache_req *reqp); |
0989a788 | 161 | struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *); |
1da177e4 LT |
162 | |
163 | #endif /* __KERNEL__ */ | |
164 | ||
165 | #endif /* NFSD_EXPORT_H */ | |
166 |