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132 lines
3.3 KiB
132 lines
3.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 1995-1997 Olaf Kirch <[email protected]> |
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*/ |
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#ifndef NFSD_EXPORT_H |
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#define NFSD_EXPORT_H |
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#include <linux/sunrpc/cache.h> |
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#include <linux/percpu_counter.h> |
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#include <uapi/linux/nfsd/export.h> |
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#include <linux/nfs4.h> |
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struct knfsd_fh; |
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struct svc_fh; |
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struct svc_rqst; |
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/* |
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* FS Locations |
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*/ |
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#define MAX_FS_LOCATIONS 128 |
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struct nfsd4_fs_location { |
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char *hosts; /* colon separated list of hosts */ |
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char *path; /* slash separated list of path components */ |
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}; |
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struct nfsd4_fs_locations { |
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uint32_t locations_count; |
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struct nfsd4_fs_location *locations; |
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/* If we're not actually serving this data ourselves (only providing a |
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* list of replicas that do serve it) then we set "migrated": */ |
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int migrated; |
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}; |
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/* |
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* We keep an array of pseudoflavors with the export, in order from most |
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* to least preferred. For the foreseeable future, we don't expect more |
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* than the eight pseudoflavors null, unix, krb5, krb5i, krb5p, skpm3, |
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* spkm3i, and spkm3p (and using all 8 at once should be rare). |
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*/ |
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#define MAX_SECINFO_LIST 8 |
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#define EX_UUID_LEN 16 |
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struct exp_flavor_info { |
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u32 pseudoflavor; |
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u32 flags; |
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}; |
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/* Per-export stats */ |
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enum { |
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EXP_STATS_FH_STALE, |
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EXP_STATS_IO_READ, |
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EXP_STATS_IO_WRITE, |
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EXP_STATS_COUNTERS_NUM |
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}; |
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struct export_stats { |
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time64_t start_time; |
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struct percpu_counter counter[EXP_STATS_COUNTERS_NUM]; |
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}; |
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struct svc_export { |
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struct cache_head h; |
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struct auth_domain * ex_client; |
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int ex_flags; |
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struct path ex_path; |
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kuid_t ex_anon_uid; |
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kgid_t ex_anon_gid; |
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int ex_fsid; |
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unsigned char * ex_uuid; /* 16 byte fsid */ |
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struct nfsd4_fs_locations ex_fslocs; |
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uint32_t ex_nflavors; |
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struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST]; |
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u32 ex_layout_types; |
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struct nfsd4_deviceid_map *ex_devid_map; |
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struct cache_detail *cd; |
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struct rcu_head ex_rcu; |
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struct export_stats ex_stats; |
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}; |
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/* an "export key" (expkey) maps a filehandlefragement to an |
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* svc_export for a given client. There can be several per export, |
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* for the different fsid types. |
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*/ |
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struct svc_expkey { |
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struct cache_head h; |
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struct auth_domain * ek_client; |
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int ek_fsidtype; |
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u32 ek_fsid[6]; |
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struct path ek_path; |
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struct rcu_head ek_rcu; |
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}; |
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#define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC)) |
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#define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE) |
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#define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES) |
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int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp); |
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__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp); |
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/* |
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* Function declarations |
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*/ |
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int nfsd_export_init(struct net *); |
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void nfsd_export_shutdown(struct net *); |
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void nfsd_export_flush(struct net *); |
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struct svc_export * rqst_exp_get_by_name(struct svc_rqst *, |
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struct path *); |
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struct svc_export * rqst_exp_parent(struct svc_rqst *, |
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struct path *); |
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struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *); |
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int exp_rootfh(struct net *, struct auth_domain *, |
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char *path, struct knfsd_fh *, int maxsize); |
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__be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *); |
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__be32 nfserrno(int errno); |
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static inline void exp_put(struct svc_export *exp) |
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{ |
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cache_put(&exp->h, exp->cd); |
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} |
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static inline struct svc_export *exp_get(struct svc_export *exp) |
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{ |
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cache_get(&exp->h); |
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return exp; |
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} |
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struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *); |
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#endif /* NFSD_EXPORT_H */
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