i386/linux-2.3.21/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, 1996 Olaf Kirch <okir@monad.swb.de>
   8  */
   9
  10 #ifndef NFSD_EXPORT_H
  11 #define NFSD_EXPORT_H
  12
  13 #include <linux/types.h>
  14 #include <linux/socket.h>
  15 #include <linux/in.h>
  16 #include <linux/fs.h>
  17
  18 /*
  19  * Important limits for the exports stuff.
  20  */
  21 #define NFSCLNT_IDMAX           1024
  22 #define NFSCLNT_ADDRMAX         16
  23 #define NFSCLNT_KEYMAX          32
  24
  25 /*
  26  * Export flags.
  27  */
  28 #define NFSEXP_READONLY         0x0001
  29 #define NFSEXP_INSECURE_PORT    0x0002
  30 #define NFSEXP_ROOTSQUASH       0x0004
  31 #define NFSEXP_ALLSQUASH        0x0008
  32 #define NFSEXP_ASYNC            0x0010
  33 #define NFSEXP_GATHERED_WRITES  0x0020
  34 #define NFSEXP_UIDMAP           0x0040
  35 #define NFSEXP_KERBEROS         0x0080          /* not available */
  36 #define NFSEXP_SUNSECURE        0x0100
  37 #define NFSEXP_CROSSMNT         0x0200          /* not available */
  38 #define NFSEXP_ALLFLAGS         0x03FF
  39
  40
  41 #ifdef __KERNEL__
  42
  43 /* The following are hashtable sizes and must be powers of 2 */
  44 #define NFSCLNT_EXPMAX          16
  45
  46 struct svc_client {
  47         struct svc_client *     cl_next;
  48         char                    cl_ident[NFSCLNT_IDMAX];
  49         int                     cl_idlen;
  50         int                     cl_naddr;
  51         struct in_addr          cl_addr[NFSCLNT_ADDRMAX];
  52         struct svc_uidmap *     cl_umap;
  53         struct svc_export *     cl_export[NFSCLNT_EXPMAX];
  54 };
  55
  56 struct svc_export {
  57         struct svc_export *     ex_next;
  58         char                    ex_path[NFS_MAXPATHLEN+1];
  59         struct svc_export *     ex_parent;
  60         struct svc_client *     ex_client;
  61         int                     ex_flags;
  62         struct dentry *         ex_dentry;
  63         kdev_t                  ex_dev;
  64         ino_t                   ex_ino;
  65         uid_t                   ex_anon_uid;
  66         gid_t                   ex_anon_gid;
  67 };
  68
  69 #define EX_SECURE(exp)          (!((exp)->ex_flags & NFSEXP_INSECURE_PORT))
  70 #define EX_ISSYNC(exp)          (!((exp)->ex_flags & NFSEXP_ASYNC))
  71 #define EX_RDONLY(exp)          ((exp)->ex_flags & NFSEXP_READONLY)
  72 #define EX_CROSSMNT(exp)        ((exp)->ex_flags & NFSEXP_CROSSMNT)
  73 #define EX_SUNSECURE(exp)       ((exp)->ex_flags & NFSEXP_SUNSECURE)
  74 #define EX_WGATHER(exp)         ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
  75
  76
  77 /*
  78  * Function declarations
  79  */
  80 void                    nfsd_export_init(void);
  81 void                    nfsd_export_shutdown(void);
  82 void                    exp_readlock(void);
  83 int                     exp_writelock(void);
  84 void                    exp_unlock(void);
  85 struct svc_client *     exp_getclient(struct sockaddr_in *sin);
  86 void                    exp_putclient(struct svc_client *clp);
  87 struct svc_export *     exp_get(struct svc_client *clp, kdev_t dev, ino_t ino);
  88 int                     exp_rootfh(struct svc_client *, kdev_t, ino_t,
  89                                         char *path, struct knfs_fh *);
  90 int                     nfserrno(int errno);
  91 void                    exp_nlmdetach(void);
  92
  93
  94 extern __inline__ int
  95 exp_checkaddr(struct svc_client *clp, struct in_addr addr)
  96 {
  97         struct in_addr  *ap = clp->cl_addr;
  98         int             i;
  99
 100         for (i = clp->cl_naddr; i--; ap++)
 101                 if (ap->s_addr == addr.s_addr)
 102                         return 1;
 103         return 0;
 104 }
 105
 106 #endif /* __KERNEL__ */
 107
 108 #endif /* NFSD_EXPORT_H */
 109