161 lines
4.5 KiB
C
161 lines
4.5 KiB
C
/*
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* include/linux/nfsd/export.h
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*
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* Public declarations for NFS exports. The definitions for the
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* syscall interface are in nfsctl.h
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*
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* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
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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/types.h>
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#ifdef __KERNEL__
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# include <linux/nfsd/nfsfh.h>
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#endif
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/*
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* Important limits for the exports stuff.
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*/
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#define NFSCLNT_IDMAX 1024
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#define NFSCLNT_ADDRMAX 16
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#define NFSCLNT_KEYMAX 32
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/*
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* Export flags.
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*/
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#define NFSEXP_READONLY 0x0001
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#define NFSEXP_INSECURE_PORT 0x0002
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#define NFSEXP_ROOTSQUASH 0x0004
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#define NFSEXP_ALLSQUASH 0x0008
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#define NFSEXP_ASYNC 0x0010
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#define NFSEXP_GATHERED_WRITES 0x0020
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/* 40 80 100 currently unused */
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#define NFSEXP_NOHIDE 0x0200
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#define NFSEXP_NOSUBTREECHECK 0x0400
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#define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */
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#define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect; no longer supported */
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#define NFSEXP_FSID 0x2000
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#define NFSEXP_CROSSMOUNT 0x4000
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#define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */
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/*
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* The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4
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* clients, and only to the single directory that is the root of the
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* export; further lookup and readdir operations are treated as if every
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* subdirectory was a mountpoint, and ignored if they are not themselves
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* exported. This is used by nfsd and mountd to construct the NFSv4
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* pseudofilesystem, which provides access only to paths leading to each
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* exported filesystem.
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*/
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#define NFSEXP_V4ROOT 0x10000
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/* All flags that we claim to support. (Note we don't support NOACL.) */
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#define NFSEXP_ALLFLAGS 0x17E3F
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/* The flags that may vary depending on security flavor: */
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#define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \
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| NFSEXP_ALLSQUASH \
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| NFSEXP_INSECURE_PORT)
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#ifdef __KERNEL__
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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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struct exp_flavor_info {
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u32 pseudoflavor;
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u32 flags;
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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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uid_t ex_anon_uid;
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gid_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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int ex_nflavors;
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struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST];
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struct cache_detail *cd;
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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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};
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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 void exp_get(struct svc_export *exp)
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{
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cache_get(&exp->h);
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}
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struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
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#endif /* __KERNEL__ */
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#endif /* NFSD_EXPORT_H */
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