| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> |
| */ |
| #ifndef NFSD_EXPORT_H |
| #define NFSD_EXPORT_H |
| |
| #include <linux/sunrpc/cache.h> |
| #include <linux/percpu_counter.h> |
| #include <uapi/linux/nfsd/export.h> |
| #include <linux/nfs4.h> |
| |
| struct knfsd_fh; |
| struct svc_fh; |
| struct svc_rqst; |
| |
| /* |
| * 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 foreseeable 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 |
| #define EX_UUID_LEN 16 |
| |
| struct exp_flavor_info { |
| u32 pseudoflavor; |
| u32 flags; |
| }; |
| |
| /* Per-export stats */ |
| enum { |
| EXP_STATS_FH_STALE, |
| EXP_STATS_IO_READ, |
| EXP_STATS_IO_WRITE, |
| EXP_STATS_COUNTERS_NUM |
| }; |
| |
| struct export_stats { |
| time64_t start_time; |
| struct percpu_counter counter[EXP_STATS_COUNTERS_NUM]; |
| }; |
| |
| struct svc_export { |
| struct cache_head h; |
| struct auth_domain * ex_client; |
| int ex_flags; |
| int ex_fsid; |
| struct path ex_path; |
| kuid_t ex_anon_uid; |
| kgid_t ex_anon_gid; |
| unsigned char * ex_uuid; /* 16 byte fsid */ |
| struct nfsd4_fs_locations ex_fslocs; |
| uint32_t ex_nflavors; |
| struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST]; |
| u32 ex_layout_types; |
| struct nfsd4_deviceid_map *ex_devid_map; |
| struct cache_detail *cd; |
| struct rcu_work ex_rcu_work; |
| unsigned long ex_xprtsec_modes; |
| struct export_stats *ex_stats; |
| }; |
| |
| /* 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; |
| struct rcu_work ek_rcu_work; |
| }; |
| |
| #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) |
| |
| struct svc_cred; |
| int nfsexp_flags(struct svc_cred *cred, struct svc_export *exp); |
| __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp, |
| bool may_bypass_gss); |
| |
| /* |
| * Function declarations |
| */ |
| int nfsd_export_init(struct net *); |
| void nfsd_export_shutdown(struct net *); |
| void nfsd_export_flush(struct net *); |
| struct svc_export * rqst_exp_get_by_name(struct svc_rqst *, |
| struct path *); |
| struct svc_export * rqst_exp_parent(struct svc_rqst *, |
| struct path *); |
| struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *); |
| int exp_rootfh(struct net *, struct auth_domain *, |
| char *path, struct knfsd_fh *, int maxsize); |
| __be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *); |
| |
| static inline void exp_put(struct svc_export *exp) |
| { |
| cache_put(&exp->h, exp->cd); |
| } |
| |
| static inline struct svc_export *exp_get(struct svc_export *exp) |
| { |
| cache_get(&exp->h); |
| return exp; |
| } |
| struct svc_export *rqst_exp_find(struct cache_req *reqp, struct net *net, |
| struct auth_domain *cl, struct auth_domain *gsscl, |
| int fsid_type, u32 *fsidv); |
| |
| #endif /* NFSD_EXPORT_H */ |