/* SPDX-License-Identifier: GPL-2.0+ */

  /*
   * (C) Masami Komiya <mkomiya@sonare.it> 2004

   */
  
  #ifndef __NFS_H__
  #define __NFS_H__
  
  #define SUNRPC_PORT     111
  
  #define PROG_PORTMAP    100000
  #define PROG_NFS        100003
  #define PROG_MOUNT      100005
  
  #define MSG_CALL        0
  #define MSG_REPLY       1
  
  #define PORTMAP_GETPORT 3
  
  #define MOUNT_ADDENTRY  1
  #define MOUNT_UMOUNTALL 4
  
  #define NFS_LOOKUP      4
  #define NFS_READLINK    5
  #define NFS_READ        6

  #define NFS3PROC_LOOKUP 3

  #define NFS_FHSIZE      32

  #define NFS3_FHSIZE     64

  
  #define NFSERR_PERM     1
  #define NFSERR_NOENT    2
  #define NFSERR_ACCES    13
  #define NFSERR_ISDIR    21
  #define NFSERR_INVAL    22

  /*
   * Block size used for NFS read accesses.  A RPC reply packet (including  all

   * headers) must fit within a single Ethernet frame to avoid fragmentation.

   * However, if CONFIG_IP_DEFRAG is set, a bigger value could be used.  In any
   * case, most NFS servers are optimized for a power of 2.

   */

  #define NFS_READ_SIZE	1024	/* biggest power of two that fits Ether frame */

  #define NFS_MAX_ATTRS	26

  /* Values for Accept State flag on RPC answers (See: rfc1831) */
  enum rpc_accept_stat {
  	NFS_RPC_SUCCESS = 0,	/* RPC executed successfully */
  	NFS_RPC_PROG_UNAVAIL = 1,	/* remote hasn't exported program */
  	NFS_RPC_PROG_MISMATCH = 2,	/* remote can't support version # */
  	NFS_RPC_PROC_UNAVAIL = 3,	/* program can't support procedure */
  	NFS_RPC_GARBAGE_ARGS = 4,	/* procedure can't decode params */
  	NFS_RPC_SYSTEM_ERR = 5	/* errors like memory allocation failure */
  };

  struct rpc_t {
  	union {

  		uint8_t data[NFS_READ_SIZE + (6 + NFS_MAX_ATTRS) *
  			sizeof(uint32_t)];

  		struct {
  			uint32_t id;
  			uint32_t type;
  			uint32_t rpcvers;
  			uint32_t prog;
  			uint32_t vers;
  			uint32_t proc;
  			uint32_t data[1];
  		} call;
  		struct {
  			uint32_t id;
  			uint32_t type;
  			uint32_t rstatus;
  			uint32_t verifier;
  			uint32_t v2;
  			uint32_t astatus;

  			uint32_t data[NFS_READ_SIZE / sizeof(uint32_t) +
  				NFS_MAX_ATTRS];

  		} reply;
  	} u;

  } __attribute__((packed));

  void nfs_start(void);	/* Begin NFS */

  
  
  /**********************************************************************/
  
  #endif /* __NFS_H__ */