include/linux/nfsd/export.h

   1 /*
   2  * include/linux/nfsd/export.h
   3  *
   4  * Public declarations for NFS exports. The definitions for the
   5  * syscall interface are in nfsctl.h
   6  *
   7  * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
   8  */
   9
  10 #ifndef NFSD_EXPORT_H
  11 #define NFSD_EXPORT_H
  12
  13 #include <asm/types.h>
  14 #ifdef __KERNEL__
  15 # include <linux/types.h>
  16 # include <linux/in.h>
  17 #endif
  18
  19 /*
  20  * Important limits for the exports stuff.
  21  */
  22 #define NFSCLNT_IDMAX           1024
  23 #define NFSCLNT_ADDRMAX         16
  24 #define NFSCLNT_KEYMAX          32
  25
  26 /*
  27  * Export flags.
  28  */
  29 #define NFSEXP_READONLY         0x0001
  30 #define NFSEXP_INSECURE_PORT    0x0002
  31 #define NFSEXP_ROOTSQUASH       0x0004
  32 #define NFSEXP_ALLSQUASH        0x0008
  33 #define NFSEXP_ASYNC            0x0010
  34 #define NFSEXP_GATHERED_WRITES  0x0020
  35 #define NFSEXP_UIDMAP           0x0040
  36 #define NFSEXP_KERBEROS         0x0080          /* not available */
  37 #define NFSEXP_SUNSECURE        0x0100
  38 #define NFSEXP_CROSSMNT         0x0200
  39 #define NFSEXP_NOSUBTREECHECK   0x0400
  40 #define NFSEXP_NOAUTHNLM        0x0800          /* Don't authenticate NLM requests - just trust */
  41 #define NFSEXP_MSNFS            0x1000  /* do silly things that MS clients expect */
  42 #define NFSEXP_ALLFLAGS         0x1FFF
  43
  44
  45 #ifdef __KERNEL__
  46
  47 /* The following are hashtable sizes and must be powers of 2 */
  48 #define NFSCLNT_EXPMAX          16
  49
  50 struct svc_client {
  51         struct svc_client *     cl_next;
  52         char                    cl_ident[NFSCLNT_IDMAX];
  53         int                     cl_idlen;
  54         int                     cl_naddr;
  55         struct in_addr          cl_addr[NFSCLNT_ADDRMAX];
  56         struct svc_uidmap *     cl_umap;
  57         struct svc_export *     cl_export[NFSCLNT_EXPMAX];
  58 };
  59
  60 struct svc_export {
  61         struct svc_export *     ex_next;
  62         char                    ex_path[NFS_MAXPATHLEN+1];
  63         struct svc_export *     ex_parent;
  64         struct svc_client *     ex_client;
  65         int                     ex_flags;
  66         struct vfsmount *       ex_mnt;
  67         struct dentry *         ex_dentry;
  68         kdev_t                  ex_dev;
  69         ino_t                   ex_ino;
  70         uid_t                   ex_anon_uid;
  71         gid_t                   ex_anon_gid;
  72 };
  73
  74 #define EX_SECURE(exp)          (!((exp)->ex_flags & NFSEXP_INSECURE_PORT))
  75 #define EX_ISSYNC(exp)          (!((exp)->ex_flags & NFSEXP_ASYNC))
  76 #define EX_RDONLY(exp)          ((exp)->ex_flags & NFSEXP_READONLY)
  77 #define EX_CROSSMNT(exp)        ((exp)->ex_flags & NFSEXP_CROSSMNT)
  78 #define EX_SUNSECURE(exp)       ((exp)->ex_flags & NFSEXP_SUNSECURE)
  79 #define EX_WGATHER(exp)         ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
  80
  81
  82 /*
  83  * Function declarations
  84  */
  85 void                    nfsd_export_init(void);
  86 void                    nfsd_export_shutdown(void);
  87 void                    exp_readlock(void);
  88 int                     exp_writelock(void);
  89 void                    exp_unlock(void);
  90 struct svc_client *     exp_getclient(struct sockaddr_in *sin);
  91 void                    exp_putclient(struct svc_client *clp);
  92 struct svc_export *     exp_get(struct svc_client *clp, kdev_t dev, ino_t ino);
  93 int                     exp_rootfh(struct svc_client *, kdev_t, ino_t,
  94                                         char *path, struct knfsd_fh *, int maxsize);
  95 int                     nfserrno(int errno);
  96 void                    exp_nlmdetach(void);
  97
  98
  99 #endif /* __KERNEL__ */
 100
 101 #endif /* NFSD_EXPORT_H */
 102