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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
3 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#ifndef NFSD_EXPORT_H
5#define NFSD_EXPORT_H
6
Christoph Hellwig9c69de42014-05-06 19:37:13 +02007#include <linux/sunrpc/cache.h>
David Howells616d1ca2012-10-09 09:49:02 +01008#include <uapi/linux/nfsd/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
Christoph Hellwig9c69de42014-05-06 19:37:13 +020010struct knfsd_fh;
11struct svc_fh;
12struct svc_rqst;
13
Manoj Naik933469192006-10-04 02:16:18 -070014/*
15 * FS Locations
16 */
17
18#define MAX_FS_LOCATIONS 128
19
20struct nfsd4_fs_location {
21 char *hosts; /* colon separated list of hosts */
22 char *path; /* slash separated list of path components */
23};
24
25struct nfsd4_fs_locations {
26 uint32_t locations_count;
27 struct nfsd4_fs_location *locations;
28/* If we're not actually serving this data ourselves (only providing a
29 * list of replicas that do serve it) then we set "migrated": */
30 int migrated;
31};
32
Andy Adamsone677bfe2007-07-17 04:04:42 -070033/*
34 * We keep an array of pseudoflavors with the export, in order from most
Lucas De Marchi25985ed2011-03-30 22:57:33 -030035 * to least preferred. For the foreseeable future, we don't expect more
Andy Adamsone677bfe2007-07-17 04:04:42 -070036 * than the eight pseudoflavors null, unix, krb5, krb5i, krb5p, skpm3,
37 * spkm3i, and spkm3p (and using all 8 at once should be rare).
38 */
39#define MAX_SECINFO_LIST 8
Kinglong Mee94eb3682014-05-23 20:00:19 +080040#define EX_UUID_LEN 16
Andy Adamsone677bfe2007-07-17 04:04:42 -070041
42struct exp_flavor_info {
43 u32 pseudoflavor;
44 u32 flags;
45};
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047struct svc_export {
48 struct cache_head h;
49 struct auth_domain * ex_client;
50 int ex_flags;
Jan Blunck54775492008-02-14 19:38:39 -080051 struct path ex_path;
Eric W. Biederman4c1e1b32013-02-02 06:42:53 -080052 kuid_t ex_anon_uid;
53 kgid_t ex_anon_gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 int ex_fsid;
NeilBrownaf6a4e22007-02-14 00:33:12 -080055 unsigned char * ex_uuid; /* 16 byte fsid */
Manoj Naik933469192006-10-04 02:16:18 -070056 struct nfsd4_fs_locations ex_fslocs;
Kinglong Mee1f531462014-05-24 11:26:49 +080057 uint32_t ex_nflavors;
Andy Adamsone677bfe2007-07-17 04:04:42 -070058 struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST];
Stanislav Kinsburskydb3a3532012-03-28 19:09:08 +040059 struct cache_detail *cd;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060};
61
62/* an "export key" (expkey) maps a filehandlefragement to an
NeilBrownaf6a4e22007-02-14 00:33:12 -080063 * svc_export for a given client. There can be several per export,
64 * for the different fsid types.
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 */
66struct svc_expkey {
67 struct cache_head h;
68
69 struct auth_domain * ek_client;
70 int ek_fsidtype;
NeilBrownaf6a4e22007-02-14 00:33:12 -080071 u32 ek_fsid[6];
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Jan Bluncke83aece2008-02-14 19:38:41 -080073 struct path ek_path;
Linus Torvalds1da177e2005-04-16 15:20:36 -070074};
75
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC))
Linus Torvalds1da177e2005-04-16 15:20:36 -070077#define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE)
78#define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
79
J. Bruce Fieldsc7d51402007-07-19 01:49:20 -070080int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp);
Andy Adamson32c1eb02007-07-17 04:04:48 -070081__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
83/*
84 * Function declarations
85 */
Stanislav Kinsburskyb89109b2012-04-11 15:13:14 +040086int nfsd_export_init(struct net *);
87void nfsd_export_shutdown(struct net *);
Stanislav Kinsburskyb3853e02012-04-11 15:13:21 +040088void nfsd_export_flush(struct net *);
J. Bruce Fields0989a782007-07-17 04:04:44 -070089struct svc_export * rqst_exp_get_by_name(struct svc_rqst *,
Al Viro91c9fa82009-04-18 02:42:05 -040090 struct path *);
J. Bruce Fields0989a782007-07-17 04:04:44 -070091struct svc_export * rqst_exp_parent(struct svc_rqst *,
Al Viroe64c3902009-04-18 03:00:46 -040092 struct path *);
Trond Myklebusted748aa2011-09-12 19:37:06 -040093struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *);
Stanislav Kinsburskyb3853e02012-04-11 15:13:21 +040094int exp_rootfh(struct net *, struct auth_domain *,
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 char *path, struct knfsd_fh *, int maxsize);
J. Bruce Fieldsdf547ef2007-07-17 04:04:43 -070096__be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
Al Viro63f103112006-10-19 23:28:54 -070097__be32 nfserrno(int errno);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Linus Torvalds1da177e2005-04-16 15:20:36 -070099static inline void exp_put(struct svc_export *exp)
100{
Stanislav Kinsbursky71234972012-03-28 19:09:15 +0400101 cache_put(&exp->h, exp->cd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102}
103
Kinglong Meebf18f162014-06-10 22:06:44 +0800104static inline struct svc_export *exp_get(struct svc_export *exp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105{
106 cache_get(&exp->h);
Kinglong Meebf18f162014-06-10 22:06:44 +0800107 return exp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108}
J. Bruce Fields0989a782007-07-17 04:04:44 -0700109struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111#endif /* NFSD_EXPORT_H */