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 (at) 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 vfsmount * ek_mnt; 71 struct dentry * ek_dentry; 72 }; 73 74 #define EX_SECURE(exp) (!((exp)->ex_flags & NFSEXP_INSECURE_PORT)) 75 #define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC)) 76 #define EX_RDONLY(exp) ((exp)->ex_flags & NFSEXP_READONLY) 77 #define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE) 78 #define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES) 79 80 81 /* 82 * Function declarations 83 */ 84 void nfsd_export_init(void); 85 void nfsd_export_shutdown(void); 86 void nfsd_export_flush(void); 87 void exp_readlock(void); 88 void exp_readunlock(void); 89 struct svc_export * exp_get_by_name(struct auth_domain *clp, 90 struct vfsmount *mnt, 91 struct dentry *dentry, 92 struct cache_req *reqp); 93 struct svc_export * exp_parent(struct auth_domain *clp, 94 struct vfsmount *mnt, 95 struct dentry *dentry, 96 struct cache_req *reqp); 97 int exp_rootfh(struct auth_domain *, 98 char *path, struct knfsd_fh *, int maxsize); 99 int exp_pseudoroot(struct auth_domain *, struct svc_fh *fhp, struct cache_req *creq); 100 int nfserrno(int errno); 101 102 extern struct cache_detail svc_export_cache; 103 104 static inline void exp_put(struct svc_export *exp) 105 { 106 cache_put(&exp->h, &svc_export_cache); 107 } 108 109 static inline void exp_get(struct svc_export *exp) 110 { 111 cache_get(&exp->h); 112 } 113 extern struct svc_export * 114 exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv, 115 struct cache_req *reqp); 116 117 #endif /* __KERNEL__ */ 118 119 #endif /* NFSD_EXPORT_H */ 120 121
