1/* 2 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> 3 */ 4#ifndef NFSD_EXPORT_H 5#define NFSD_EXPORT_H 6 7#include <linux/sunrpc/cache.h> 8#include <uapi/linux/nfsd/export.h> 9 10struct knfsd_fh; 11struct svc_fh; 12struct svc_rqst; 13 14/* 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 33/* 34 * We keep an array of pseudoflavors with the export, in order from most 35 * to least preferred. For the foreseeable future, we don't expect more 36 * 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 40#define EX_UUID_LEN 16 41 42struct exp_flavor_info { 43 u32 pseudoflavor; 44 u32 flags; 45}; 46 47struct svc_export { 48 struct cache_head h; 49 struct auth_domain * ex_client; 50 int ex_flags; 51 struct path ex_path; 52 kuid_t ex_anon_uid; 53 kgid_t ex_anon_gid; 54 int ex_fsid; 55 unsigned char * ex_uuid; /* 16 byte fsid */ 56 struct nfsd4_fs_locations ex_fslocs; 57 uint32_t ex_nflavors; 58 struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST]; 59 enum pnfs_layouttype ex_layout_type; 60 struct nfsd4_deviceid_map *ex_devid_map; 61 struct cache_detail *cd; 62}; 63 64/* an "export key" (expkey) maps a filehandlefragement to an 65 * svc_export for a given client. There can be several per export, 66 * for the different fsid types. 67 */ 68struct svc_expkey { 69 struct cache_head h; 70 71 struct auth_domain * ek_client; 72 int ek_fsidtype; 73 u32 ek_fsid[6]; 74 75 struct path ek_path; 76}; 77 78#define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC)) 79#define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE) 80#define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES) 81 82int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp); 83__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp); 84 85/* 86 * Function declarations 87 */ 88int nfsd_export_init(struct net *); 89void nfsd_export_shutdown(struct net *); 90void nfsd_export_flush(struct net *); 91struct svc_export * rqst_exp_get_by_name(struct svc_rqst *, 92 struct path *); 93struct svc_export * rqst_exp_parent(struct svc_rqst *, 94 struct path *); 95struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *); 96int exp_rootfh(struct net *, struct auth_domain *, 97 char *path, struct knfsd_fh *, int maxsize); 98__be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *); 99__be32 nfserrno(int errno); 100 101static inline void exp_put(struct svc_export *exp) 102{ 103 cache_put(&exp->h, exp->cd); 104} 105 106static inline struct svc_export *exp_get(struct svc_export *exp) 107{ 108 cache_get(&exp->h); 109 return exp; 110} 111struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *); 112 113#endif /* NFSD_EXPORT_H */ 114