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) */
48 enum 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 
57 struct 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 };
82 void nfs_start(void);	/* Begin NFS */
83 
84 
85 /**********************************************************************/
86 
87 #endif /* __NFS_H__ */
88