/* * include/linux/nfsd/export.h * * Public declarations for NFS exports. The definitions for the * syscall interface are in nfsctl.h * * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> */ #ifndef NFSD_EXPORT_H #define NFSD_EXPORT_H # include <linux/types.h> #ifdef __KERNEL__ # include <linux/nfsd/nfsfh.h> #endif /* * Important limits for the exports stuff. */ #define NFSCLNT_IDMAX 1024 #define NFSCLNT_ADDRMAX 16 #define NFSCLNT_KEYMAX 32 /* * Export flags. */ #define NFSEXP_READONLY 0x0001 #define NFSEXP_INSECURE_PORT 0x0002 #define NFSEXP_ROOTSQUASH 0x0004 #define NFSEXP_ALLSQUASH 0x0008 #define NFSEXP_ASYNC 0x0010 #define NFSEXP_GATHERED_WRITES 0x0020 /* 40 80 100 currently unused */ #define NFSEXP_NOHIDE 0x0200 #define NFSEXP_NOSUBTREECHECK 0x0400 #define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */ #define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect; no longer supported */ #define NFSEXP_FSID 0x2000 #define NFSEXP_CROSSMOUNT 0x4000 #define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */ /* * The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4 * clients, and only to the single directory that is the root of the * export; further lookup and readdir operations are treated as if every * subdirectory was a mountpoint, and ignored if they are not themselves * exported. This is used by nfsd and mountd to construct the NFSv4 * pseudofilesystem, which provides access only to paths leading to each * exported filesystem. */ #define NFSEXP_V4ROOT 0x10000 /* All flags that we claim to support. (Note we don't support NOACL.) */ #define NFSEXP_ALLFLAGS 0x17E3F /* The flags that may vary depending on security flavor: */ #define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \ | NFSEXP_ALLSQUASH \ | NFSEXP_INSECURE_PORT) #ifdef __KERNEL__ /* * FS Locations */ #define MAX_FS_LOCATIONS 128 struct nfsd4_fs_location { char *hosts; /* colon separated list of hosts */ char *path; /* slash separated list of path components */ }; struct nfsd4_fs_locations { uint32_t locations_count; struct nfsd4_fs_location *locations; /* If we're not actually serving this data ourselves (only providing a * list of replicas that do serve it) then we set "migrated": */ int migrated; }; /* * We keep an array of pseudoflavors with the export, in order from most * to least preferred. For the forseeable future, we don't expect more * than the eight pseudoflavors null, unix, krb5, krb5i, krb5p, skpm3, * spkm3i, and spkm3p (and using all 8 at once should be rare). */ #define MAX_SECINFO_LIST 8 struct exp_flavor_info { u32 pseudoflavor; u32 flags; }; struct svc_export { struct cache_head h; struct auth_domain * ex_client; int ex_flags; struct path ex_path; char *ex_pathname; uid_t ex_anon_uid; gid_t ex_anon_gid; int ex_fsid; unsigned char * ex_uuid; /* 16 byte fsid */ struct nfsd4_fs_locations ex_fslocs; int ex_nflavors; struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST]; }; /* an "export key" (expkey) maps a filehandlefragement to an * svc_export for a given client. There can be several per export, * for the different fsid types. */ struct svc_expkey { struct cache_head h; struct auth_domain * ek_client; int ek_fsidtype; u32 ek_fsid[6]; struct path ek_path; }; #define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC)) #define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE) #define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES) int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp); __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp); /* * Function declarations */ int nfsd_export_init(void); void nfsd_export_shutdown(void); void nfsd_export_flush(void); void exp_readlock(void); void exp_readunlock(void); struct svc_export * rqst_exp_get_by_name(struct svc_rqst *, struct path *); struct svc_export * rqst_exp_parent(struct svc_rqst *, struct path *); int exp_rootfh(struct auth_domain *, char *path, struct knfsd_fh *, int maxsize); __be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *); __be32 nfserrno(int errno); extern struct cache_detail svc_export_cache; static inline void exp_put(struct svc_export *exp) { cache_put(&exp->h, &svc_export_cache); } static inline void exp_get(struct svc_export *exp) { cache_get(&exp->h); } struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *); #endif /* __KERNEL__ */ #endif /* NFSD_EXPORT_H */