1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * (C) Masami Komiya <mkomiya@sonare.it> 2004
4 */
5
6#ifndef __NFS_H__
7#define __NFS_H__
8
9#define SUNRPC_PORT     111
10
11#define PROG_PORTMAP    100000
12#define PROG_NFS        100003
13#define PROG_MOUNT      100005
14
15#define MSG_CALL        0
16#define MSG_REPLY       1
17
18#define PORTMAP_GETPORT 3
19
20#define MOUNT_ADDENTRY  1
21#define MOUNT_UMOUNTALL 4
22
23#define NFS_LOOKUP      4
24#define NFS_READLINK    5
25#define NFS_READ        6
26
27#define NFS3PROC_LOOKUP 3
28
29#define NFS_FHSIZE      32
30#define NFS3_FHSIZE     64
31
32#define NFSERR_PERM     1
33#define NFSERR_NOENT    2
34#define NFSERR_ACCES    13
35#define NFSERR_ISDIR    21
36#define NFSERR_INVAL    22
37
38/*
39 * Block size used for NFS read accesses.  A RPC reply packet (including  all
40 * headers) must fit within a single Ethernet frame to avoid fragmentation.
41 * However, if CONFIG_IP_DEFRAG is set, a bigger value could be used.  In any
42 * case, most NFS servers are optimized for a power of 2.
43 */
44#define NFS_READ_SIZE	1024	/* biggest power of two that fits Ether frame */
45#define NFS_MAX_ATTRS	26
46
47/* Values for Accept State flag on RPC answers (See: rfc1831) */
48enum rpc_accept_stat {
49	NFS_RPC_SUCCESS = 0,	/* RPC executed successfully */
50	NFS_RPC_PROG_UNAVAIL = 1,	/* remote hasn't exported program */
51	NFS_RPC_PROG_MISMATCH = 2,	/* remote can't support version # */
52	NFS_RPC_PROC_UNAVAIL = 3,	/* program can't support procedure */
53	NFS_RPC_GARBAGE_ARGS = 4,	/* procedure can't decode params */
54	NFS_RPC_SYSTEM_ERR = 5	/* errors like memory allocation failure */
55};
56
57struct rpc_t {
58	union {
59		uint8_t data[NFS_READ_SIZE + (6 + NFS_MAX_ATTRS) *
60			sizeof(uint32_t)];
61		struct {
62			uint32_t id;
63			uint32_t type;
64			uint32_t rpcvers;
65			uint32_t prog;
66			uint32_t vers;
67			uint32_t proc;
68			uint32_t data[1];
69		} call;
70		struct {
71			uint32_t id;
72			uint32_t type;
73			uint32_t rstatus;
74			uint32_t verifier;
75			uint32_t v2;
76			uint32_t astatus;
77			uint32_t data[NFS_READ_SIZE / sizeof(uint32_t) +
78				NFS_MAX_ATTRS];
79		} reply;
80	} u;
81};
82void nfs_start(void);	/* Begin NFS */
83
84
85/**********************************************************************/
86
87#endif /* __NFS_H__ */
88