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 10 struct knfsd_fh; 11 struct svc_fh; 12 struct svc_rqst; 13 14 /* 15 * FS Locations 16 */ 17 18 #define MAX_FS_LOCATIONS 128 19 20 struct nfsd4_fs_location { 21 char *hosts; /* colon separated list of hosts */ 22 char *path; /* slash separated list of path components */ 23 }; 24 25 struct 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 42 struct exp_flavor_info { 43 u32 pseudoflavor; 44 u32 flags; 45 }; 46 47 struct 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 */ 68 struct 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 82 int 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 */ 88 int nfsd_export_init(struct net *); 89 void nfsd_export_shutdown(struct net *); 90 void nfsd_export_flush(struct net *); 91 struct svc_export * rqst_exp_get_by_name(struct svc_rqst *, 92 struct path *); 93 struct svc_export * rqst_exp_parent(struct svc_rqst *, 94 struct path *); 95 struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *); 96 int 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); 100 101 static inline void exp_put(struct svc_export *exp) 102 { 103 cache_put(&exp->h, exp->cd); 104 } 105 106 static inline struct svc_export *exp_get(struct svc_export *exp) 107 { 108 cache_get(&exp->h); 109 return exp; 110 } 111 struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *); 112 113 #endif /* NFSD_EXPORT_H */ 114