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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 | ||
1da177e4 | 13 | # include <linux/types.h> |
3187cedf | 14 | #ifdef __KERNEL__ |
72579ac9 | 15 | # include <linux/nfsd/nfsfh.h> |
1da177e4 LT |
16 | #endif |
17 | ||
18 | /* | |
19 | * Important limits for the exports stuff. | |
20 | */ | |
21 | #define NFSCLNT_IDMAX 1024 | |
22 | #define NFSCLNT_ADDRMAX 16 | |
23 | #define NFSCLNT_KEYMAX 32 | |
24 | ||
25 | /* | |
26 | * Export flags. | |
27 | */ | |
28 | #define NFSEXP_READONLY 0x0001 | |
29 | #define NFSEXP_INSECURE_PORT 0x0002 | |
30 | #define NFSEXP_ROOTSQUASH 0x0004 | |
31 | #define NFSEXP_ALLSQUASH 0x0008 | |
32 | #define NFSEXP_ASYNC 0x0010 | |
33 | #define NFSEXP_GATHERED_WRITES 0x0020 | |
34 | /* 40 80 100 currently unused */ | |
35 | #define NFSEXP_NOHIDE 0x0200 | |
36 | #define NFSEXP_NOSUBTREECHECK 0x0400 | |
37 | #define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */ | |
9ce137ee | 38 | #define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect; no longer supported */ |
1da177e4 LT |
39 | #define NFSEXP_FSID 0x2000 |
40 | #define NFSEXP_CROSSMOUNT 0x4000 | |
41 | #define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */ | |
eb4c86c6 SD |
42 | /* |
43 | * The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4 | |
44 | * clients, and only to the single directory that is the root of the | |
45 | * export; further lookup and readdir operations are treated as if every | |
46 | * subdirectory was a mountpoint, and ignored if they are not themselves | |
47 | * exported. This is used by nfsd and mountd to construct the NFSv4 | |
48 | * pseudofilesystem, which provides access only to paths leading to each | |
49 | * exported filesystem. | |
50 | */ | |
51 | #define NFSEXP_V4ROOT 0x10000 | |
e8e8753f | 52 | /* All flags that we claim to support. (Note we don't support NOACL.) */ |
3d8986c7 | 53 | #define NFSEXP_ALLFLAGS 0x17E3F |
1da177e4 | 54 | |
e677bfe4 | 55 | /* The flags that may vary depending on security flavor: */ |
1269bc69 | 56 | #define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \ |
12045a6e BF |
57 | | NFSEXP_ALLSQUASH \ |
58 | | NFSEXP_INSECURE_PORT) | |
1da177e4 LT |
59 | |
60 | #ifdef __KERNEL__ | |
61 | ||
93346919 MN |
62 | /* |
63 | * FS Locations | |
64 | */ | |
65 | ||
66 | #define MAX_FS_LOCATIONS 128 | |
67 | ||
68 | struct nfsd4_fs_location { | |
69 | char *hosts; /* colon separated list of hosts */ | |
70 | char *path; /* slash separated list of path components */ | |
71 | }; | |
72 | ||
73 | struct nfsd4_fs_locations { | |
74 | uint32_t locations_count; | |
75 | struct nfsd4_fs_location *locations; | |
76 | /* If we're not actually serving this data ourselves (only providing a | |
77 | * list of replicas that do serve it) then we set "migrated": */ | |
78 | int migrated; | |
79 | }; | |
80 | ||
e677bfe4 AA |
81 | /* |
82 | * We keep an array of pseudoflavors with the export, in order from most | |
83 | * to least preferred. For the forseeable future, we don't expect more | |
84 | * than the eight pseudoflavors null, unix, krb5, krb5i, krb5p, skpm3, | |
85 | * spkm3i, and spkm3p (and using all 8 at once should be rare). | |
86 | */ | |
87 | #define MAX_SECINFO_LIST 8 | |
88 | ||
89 | struct exp_flavor_info { | |
90 | u32 pseudoflavor; | |
91 | u32 flags; | |
92 | }; | |
93 | ||
1da177e4 LT |
94 | struct svc_export { |
95 | struct cache_head h; | |
96 | struct auth_domain * ex_client; | |
97 | int ex_flags; | |
54775491 JB |
98 | struct path ex_path; |
99 | char *ex_pathname; | |
1da177e4 LT |
100 | uid_t ex_anon_uid; |
101 | gid_t ex_anon_gid; | |
102 | int ex_fsid; | |
af6a4e28 | 103 | unsigned char * ex_uuid; /* 16 byte fsid */ |
93346919 | 104 | struct nfsd4_fs_locations ex_fslocs; |
e677bfe4 AA |
105 | int ex_nflavors; |
106 | struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST]; | |
1da177e4 LT |
107 | }; |
108 | ||
109 | /* an "export key" (expkey) maps a filehandlefragement to an | |
af6a4e28 N |
110 | * svc_export for a given client. There can be several per export, |
111 | * for the different fsid types. | |
1da177e4 LT |
112 | */ |
113 | struct svc_expkey { | |
114 | struct cache_head h; | |
115 | ||
116 | struct auth_domain * ek_client; | |
117 | int ek_fsidtype; | |
af6a4e28 | 118 | u32 ek_fsid[6]; |
1da177e4 | 119 | |
e83aece3 | 120 | struct path ek_path; |
1da177e4 LT |
121 | }; |
122 | ||
1da177e4 | 123 | #define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC)) |
1da177e4 LT |
124 | #define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE) |
125 | #define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES) | |
126 | ||
c7d51402 | 127 | int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp); |
32c1eb0c | 128 | __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp); |
1da177e4 LT |
129 | |
130 | /* | |
131 | * Function declarations | |
132 | */ | |
dbf847ec | 133 | int nfsd_export_init(void); |
1da177e4 LT |
134 | void nfsd_export_shutdown(void); |
135 | void nfsd_export_flush(void); | |
136 | void exp_readlock(void); | |
137 | void exp_readunlock(void); | |
0989a788 | 138 | struct svc_export * rqst_exp_get_by_name(struct svc_rqst *, |
91c9fa8f | 139 | struct path *); |
0989a788 | 140 | struct svc_export * rqst_exp_parent(struct svc_rqst *, |
e64c390c | 141 | struct path *); |
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 | } | |
0989a788 | 158 | struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *); |
1da177e4 LT |
159 | |
160 | #endif /* __KERNEL__ */ | |
161 | ||
162 | #endif /* NFSD_EXPORT_H */ | |
163 |