include/linux/nfsd/const.h

   1 /*
   2  * include/linux/nfsd/const.h
   3  *
   4  * Various constants related to NFS.
   5  *
   6  * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
   7  */
   8
   9 #ifndef _LINUX_NFSD_CONST_H
  10 #define _LINUX_NFSD_CONST_H
  11
  12 #include <linux/nfs.h>
  13 #include <linux/nfs2.h>
  14 #include <linux/nfs3.h>
  15 #include <linux/nfs4.h>
  16
  17 /*
  18  * Maximum protocol version supported by knfsd
  19  */
  20 #define NFSSVC_MAXVERS          3
  21
  22 /*
  23  * Maximum blocksizes supported by daemon under various circumstances.
  24  */
  25 #define NFSSVC_MAXBLKSIZE       RPCSVC_MAXPAYLOAD
  26 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
  27 #define NFSSVC_MAXBLKSIZE_V2    (8*1024)
  28
  29 #ifdef __KERNEL__
  30
  31 #include <linux/sunrpc/msg_prot.h>
  32
  33 #ifndef NFS_SUPER_MAGIC
  34 # define NFS_SUPER_MAGIC        0x6969
  35 #endif
  36
  37 /*
  38  * Largest number of bytes we need to allocate for an NFS
  39  * call or reply.  Used to control buffer sizes.  We use
  40  * the length of v3 WRITE, READDIR and READDIR replies
  41  * which are an RPC header, up to 26 XDR units of reply
  42  * data, and some page data.
  43  *
  44  * Note that accuracy here doesn't matter too much as the
  45  * size is rounded up to a page size when allocating space.
  46  */
  47 #define NFSD_BUFSIZE            ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
  48
  49 #ifdef CONFIG_NFSD_V4
  50 # define NFSSVC_XDRSIZE         NFS4_SVC_XDRSIZE
  51 #elif defined(CONFIG_NFSD_V3)
  52 # define NFSSVC_XDRSIZE         NFS3_SVC_XDRSIZE
  53 #else
  54 # define NFSSVC_XDRSIZE         NFS2_SVC_XDRSIZE
  55 #endif
  56
  57 #endif /* __KERNEL__ */
  58
  59 #endif /* _LINUX_NFSD_CONST_H */