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/*
* include/linux/nfsd/export.h
*
* Public declarations for NFS exports. The definitions for the
* syscall interface are in nfsctl.h
*
* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
*/
#ifndef NFSD_EXPORT_H
#define NFSD_EXPORT_H
#include <asm/types.h>
# include <linux/types.h>
# include <linux/in.h>
/*
* Important limits for the exports stuff.
*/
#define NFSCLNT_IDMAX 1024
#define NFSCLNT_ADDRMAX 16
#define NFSCLNT_KEYMAX 32
/*
* Export flags.
*/
#define NFSEXP_READONLY 0x0001
#define NFSEXP_INSECURE_PORT 0x0002
#define NFSEXP_ROOTSQUASH 0x0004
#define NFSEXP_ALLSQUASH 0x0008
#define NFSEXP_ASYNC 0x0010
#define NFSEXP_GATHERED_WRITES 0x0020
#define NFSEXP_UIDMAP 0x0040
#define NFSEXP_KERBEROS 0x0080 /* not available */
#define NFSEXP_SUNSECURE 0x0100
#define NFSEXP_NOHIDE 0x0200
#define NFSEXP_NOSUBTREECHECK 0x0400
#define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */
#define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect */
#define NFSEXP_FSID 0x2000
#define NFSEXP_CROSSMNT 0x4000
#define NFSEXP_NOACL 0x8000 /* turn off acl support */
#define NFSEXP_ALLFLAGS 0xFFFF
/* The following are hashtable sizes and must be powers of 2 */
#define NFSCLNT_EXPMAX 16
struct svc_client {
struct svc_client * cl_next;
char cl_ident[NFSCLNT_IDMAX];
int cl_idlen;
int cl_naddr;
struct in_addr cl_addr[NFSCLNT_ADDRMAX];
struct svc_uidmap * cl_umap;
struct list_head cl_export[NFSCLNT_EXPMAX];
struct list_head cl_expfsid[NFSCLNT_EXPMAX];
struct list_head cl_list;
};
struct svc_export {
struct list_head ex_hash;
struct list_head ex_fsid_hash;
struct list_head ex_list;
char ex_path[NFS_MAXPATHLEN+1];
struct svc_export * ex_parent;
struct svc_client * ex_client;
int ex_flags;
struct vfsmount * ex_mnt;
struct dentry * ex_dentry;
kdev_t ex_dev;
ino_t ex_ino;
uid_t ex_anon_uid;
gid_t ex_anon_gid;
int ex_fsid;
};
#define EX_SECURE(exp) (!((exp)->ex_flags & NFSEXP_INSECURE_PORT))
#define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC))
#define EX_RDONLY(exp) ((exp)->ex_flags & NFSEXP_READONLY)
#define EX_CROSSMNT(exp) ((exp)->ex_flags & NFSEXP_CROSSMNT)
#define EX_SUNSECURE(exp) ((exp)->ex_flags & NFSEXP_SUNSECURE)
#define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
/*
* With Posix Access Control Lists, pre-NFS3 clients and older Linux
* NFSv3 clients in some cases mis-interpret the file mode permission
* bits, and either allow the remote user to read data she is not
* permitted to, or deny the user read access that should be granted.
* (With proper NFSv3, the access RPC is used to check access, and
* access decisions are not implemented on the client.)
*
* The no_acl option should be set in environments with clients that do
* not use the NFSv3 ACCESS RPC. This option should always be set for NFSv2
* clients.
*/
#define EX_ACL(exp) (!((exp)->ex_flags & NFSEXP_NOACL))
/*
* Function declarations
*/
void nfsd_export_init(void);
void nfsd_export_shutdown(void);
void exp_readlock(void);
int exp_writelock(void);
void exp_unlock(void);
struct svc_client * exp_getclient(struct sockaddr_in *sin);
void exp_putclient(struct svc_client *clp);
struct svc_export * exp_get(struct svc_client *clp, kdev_t dev, ino_t ino);
struct svc_export * exp_get_fsid(struct svc_client *clp, int fsid);
int exp_rootfh(struct svc_client *, kdev_t, ino_t,
char *path, struct knfsd_fh *, int maxsize);
int nfserrno(int errno);
void exp_nlmdetach(void);
int exp_should_drop(kdev_t dev);
#endif /* NFSD_EXPORT_H */
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