1/*
2 * linux/fs/nfs/callback.h
3 *
4 * Copyright (C) 2004 Trond Myklebust
5 *
6 * NFSv4 callback definitions
7 */
8#ifndef __LINUX_FS_NFS_CALLBACK_H
9#define __LINUX_FS_NFS_CALLBACK_H
10
11#define NFS4_CALLBACK 0x40000000
12#define NFS4_CALLBACK_XDRSIZE 2048
13#define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE)
14
15enum nfs4_callback_procnum {
16	CB_NULL = 0,
17	CB_COMPOUND = 1,
18};
19
20enum nfs4_callback_opnum {
21	OP_CB_GETATTR = 3,
22	OP_CB_RECALL  = 4,
23	OP_CB_ILLEGAL = 10044,
24};
25
26struct cb_compound_hdr_arg {
27	unsigned int taglen;
28	const char *tag;
29	unsigned int callback_ident;
30	unsigned nops;
31};
32
33struct cb_compound_hdr_res {
34	__be32 *status;
35	unsigned int taglen;
36	const char *tag;
37	__be32 *nops;
38};
39
40struct cb_getattrargs {
41	struct sockaddr_in *addr;
42	struct nfs_fh fh;
43	uint32_t bitmap[2];
44};
45
46struct cb_getattrres {
47	__be32 status;
48	uint32_t bitmap[2];
49	uint64_t size;
50	uint64_t change_attr;
51	struct timespec ctime;
52	struct timespec mtime;
53};
54
55struct cb_recallargs {
56	struct sockaddr_in *addr;
57	struct nfs_fh fh;
58	nfs4_stateid stateid;
59	uint32_t truncate;
60};
61
62extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res);
63extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy);
64
65#ifdef CONFIG_NFS_V4
66extern int nfs_callback_up(void);
67extern void nfs_callback_down(void);
68#else
69#define nfs_callback_up()	(0)
70#define nfs_callback_down()	do {} while(0)
71#endif
72
73extern unsigned int nfs_callback_set_tcpport;
74extern unsigned short nfs_callback_tcpport;
75
76#endif /* __LINUX_FS_NFS_CALLBACK_H */
77