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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, | |
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, | |
33 | OP_CB_NOTIFY_DEVICEID = 14, | |
34 | OP_CB_ILLEGAL = 10044, | |
35 | }; | |
36 | ||
37 | struct cb_compound_hdr_arg { | |
38 | unsigned int taglen; | |
39 | const char *tag; | |
40 | unsigned int minorversion; | |
41 | unsigned nops; | |
42 | }; | |
43 | ||
44 | struct cb_compound_hdr_res { | |
45 | __be32 *status; | |
46 | unsigned int taglen; | |
47 | const char *tag; | |
48 | __be32 *nops; | |
49 | }; | |
50 | ||
51 | struct cb_getattrargs { | |
52 | struct sockaddr *addr; | |
53 | struct nfs_fh fh; | |
54 | uint32_t bitmap[2]; | |
55 | }; | |
56 | ||
57 | struct cb_getattrres { | |
58 | __be32 status; | |
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 { | |
67 | struct sockaddr *addr; | |
68 | struct nfs_fh fh; | |
69 | nfs4_stateid stateid; | |
70 | uint32_t truncate; | |
71 | }; | |
72 | ||
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 { | |
87 | struct sockaddr *csa_addr; | |
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 { | |
98 | __be32 csr_status; | |
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 | ||
106 | extern unsigned nfs4_callback_sequence(struct cb_sequenceargs *args, | |
107 | struct cb_sequenceres *res); | |
108 | ||
109 | extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, | |
110 | const nfs4_stateid *stateid); | |
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); | |
122 | ||
123 | struct cb_recallslotargs { | |
124 | struct sockaddr *crsa_addr; | |
125 | uint32_t crsa_target_max_slots; | |
126 | }; | |
127 | extern unsigned nfs4_callback_recallslot(struct cb_recallslotargs *args, | |
128 | void *dummy); | |
129 | ||
130 | #endif /* CONFIG_NFS_V4_1 */ | |
131 | ||
132 | extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res); | |
133 | extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy); | |
134 | ||
135 | #ifdef CONFIG_NFS_V4 | |
136 | extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); | |
137 | extern void nfs_callback_down(int minorversion); | |
138 | extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, | |
139 | const nfs4_stateid *stateid); | |
140 | #endif /* CONFIG_NFS_V4 */ | |
141 | /* | |
142 | * nfs41: Callbacks are expected to not cause substantial latency, | |
143 | * so we limit their concurrency to 1 by setting up the maximum number | |
144 | * of slots for the backchannel. | |
145 | */ | |
146 | #define NFS41_BC_MIN_CALLBACKS 1 | |
147 | #define NFS41_BC_MAX_CALLBACKS 1 | |
148 | ||
149 | extern unsigned int nfs_callback_set_tcpport; | |
150 | extern unsigned short nfs_callback_tcpport; | |
151 | extern unsigned short nfs_callback_tcpport6; | |
152 | ||
153 | #endif /* __LINUX_FS_NFS_CALLBACK_H */ |