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1da177e4 LT |
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 | ||
15 | enum nfs4_callback_procnum { | |
16 | CB_NULL = 0, | |
17 | CB_COMPOUND = 1, | |
18 | }; | |
19 | ||
20 | enum nfs4_callback_opnum { | |
21 | OP_CB_GETATTR = 3, | |
22 | OP_CB_RECALL = 4, | |
45377b94 BH |
23 | /* Callback operations new to NFSv4.1 */ |
24 | OP_CB_LAYOUTRECALL = 5, | |
25 | OP_CB_NOTIFY = 6, | |
26 | OP_CB_PUSH_DELEG = 7, | |
27 | OP_CB_RECALL_ANY = 8, | |
28 | OP_CB_RECALLABLE_OBJ_AVAIL = 9, | |
29 | OP_CB_RECALL_SLOT = 10, | |
30 | OP_CB_SEQUENCE = 11, | |
31 | OP_CB_WANTS_CANCELLED = 12, | |
32 | OP_CB_NOTIFY_LOCK = 13, | |
34bc47c9 | 33 | OP_CB_NOTIFY_DEVICEID = 14, |
1da177e4 LT |
34 | OP_CB_ILLEGAL = 10044, |
35 | }; | |
36 | ||
37 | struct cb_compound_hdr_arg { | |
2e42c3e2 | 38 | unsigned int taglen; |
1da177e4 | 39 | const char *tag; |
b8f2ef84 | 40 | unsigned int minorversion; |
1da177e4 LT |
41 | unsigned nops; |
42 | }; | |
43 | ||
44 | struct cb_compound_hdr_res { | |
5704fdeb | 45 | __be32 *status; |
2e42c3e2 | 46 | unsigned int taglen; |
1da177e4 | 47 | const char *tag; |
5704fdeb | 48 | __be32 *nops; |
1da177e4 LT |
49 | }; |
50 | ||
51 | struct cb_getattrargs { | |
671beed7 | 52 | struct sockaddr *addr; |
1da177e4 LT |
53 | struct nfs_fh fh; |
54 | uint32_t bitmap[2]; | |
55 | }; | |
56 | ||
57 | struct cb_getattrres { | |
e6f684f6 | 58 | __be32 status; |
1da177e4 LT |
59 | uint32_t bitmap[2]; |
60 | uint64_t size; | |
61 | uint64_t change_attr; | |
62 | struct timespec ctime; | |
63 | struct timespec mtime; | |
64 | }; | |
65 | ||
66 | struct cb_recallargs { | |
c1d35866 | 67 | struct sockaddr *addr; |
1da177e4 LT |
68 | struct nfs_fh fh; |
69 | nfs4_stateid stateid; | |
70 | uint32_t truncate; | |
71 | }; | |
72 | ||
2d9b9ec3 BH |
73 | #if defined(CONFIG_NFS_V4_1) |
74 | ||
75 | struct referring_call { | |
76 | uint32_t rc_sequenceid; | |
77 | uint32_t rc_slotid; | |
78 | }; | |
79 | ||
80 | struct referring_call_list { | |
81 | struct nfs4_sessionid rcl_sessionid; | |
82 | uint32_t rcl_nrefcalls; | |
83 | struct referring_call *rcl_refcalls; | |
84 | }; | |
85 | ||
86 | struct cb_sequenceargs { | |
65fc64e5 | 87 | struct sockaddr *csa_addr; |
2d9b9ec3 BH |
88 | struct nfs4_sessionid csa_sessionid; |
89 | uint32_t csa_sequenceid; | |
90 | uint32_t csa_slotid; | |
91 | uint32_t csa_highestslotid; | |
92 | uint32_t csa_cachethis; | |
93 | uint32_t csa_nrclists; | |
94 | struct referring_call_list *csa_rclists; | |
95 | }; | |
96 | ||
97 | struct cb_sequenceres { | |
65fc64e5 | 98 | __be32 csr_status; |
2d9b9ec3 BH |
99 | struct nfs4_sessionid csr_sessionid; |
100 | uint32_t csr_sequenceid; | |
101 | uint32_t csr_slotid; | |
102 | uint32_t csr_highestslotid; | |
103 | uint32_t csr_target_highestslotid; | |
104 | }; | |
105 | ||
d49433e1 BH |
106 | extern unsigned nfs4_callback_sequence(struct cb_sequenceargs *args, |
107 | struct cb_sequenceres *res); | |
108 | ||
2597641d AB |
109 | extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, |
110 | const nfs4_stateid *stateid); | |
31f09607 AB |
111 | |
112 | #define RCA4_TYPE_MASK_RDATA_DLG 0 | |
113 | #define RCA4_TYPE_MASK_WDATA_DLG 1 | |
114 | ||
115 | struct cb_recallanyargs { | |
116 | struct sockaddr *craa_addr; | |
117 | uint32_t craa_objs_to_keep; | |
118 | uint32_t craa_type_mask; | |
119 | }; | |
120 | ||
121 | extern unsigned nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy); | |
2d9b9ec3 BH |
122 | #endif /* CONFIG_NFS_V4_1 */ |
123 | ||
e6f684f6 AV |
124 | extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res); |
125 | extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy); | |
1da177e4 | 126 | |
5ae1fbce | 127 | #ifdef CONFIG_NFS_V4 |
71468513 | 128 | extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); |
e82dc22d | 129 | extern void nfs_callback_down(int minorversion); |
2597641d AB |
130 | extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, |
131 | const nfs4_stateid *stateid); | |
e82dc22d | 132 | #endif /* CONFIG_NFS_V4 */ |
a43cde94 RL |
133 | /* |
134 | * nfs41: Callbacks are expected to not cause substantial latency, | |
135 | * so we limit their concurrency to 1 by setting up the maximum number | |
136 | * of slots for the backchannel. | |
137 | */ | |
138 | #define NFS41_BC_MIN_CALLBACKS 1 | |
d49433e1 | 139 | #define NFS41_BC_MAX_CALLBACKS 1 |
a43cde94 | 140 | |
a72b4422 | 141 | extern unsigned int nfs_callback_set_tcpport; |
1da177e4 | 142 | extern unsigned short nfs_callback_tcpport; |
f738f517 | 143 | extern unsigned short nfs_callback_tcpport6; |
1da177e4 LT |
144 | |
145 | #endif /* __LINUX_FS_NFS_CALLBACK_H */ |