1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/*
* linux/fs/nfs/callback.h
*
* Copyright (C) 2004 Trond Myklebust
*
* NFSv4 callback definitions
*/
#ifndef __LINUX_FS_NFS_CALLBACK_H
#define __LINUX_FS_NFS_CALLBACK_H
#define NFS4_CALLBACK 0x40000000
#define NFS4_CALLBACK_XDRSIZE 2048
#define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE)
enum nfs4_callback_procnum {
CB_NULL = 0,
CB_COMPOUND = 1,
};
enum nfs4_callback_opnum {
OP_CB_GETATTR = 3,
OP_CB_RECALL = 4,
/* Callback operations new to NFSv4.1 */
OP_CB_LAYOUTRECALL = 5,
OP_CB_NOTIFY = 6,
OP_CB_PUSH_DELEG = 7,
OP_CB_RECALL_ANY = 8,
OP_CB_RECALLABLE_OBJ_AVAIL = 9,
OP_CB_RECALL_SLOT = 10,
OP_CB_SEQUENCE = 11,
OP_CB_WANTS_CANCELLED = 12,
OP_CB_NOTIFY_LOCK = 13,
OP_CB_NOTIFY_DEVICEID = 14,
OP_CB_ILLEGAL = 10044,
};
struct cb_process_state {
__be32 drc_status;
struct nfs_client *clp;
struct nfs4_sessionid *svc_sid; /* v4.1 callback service sessionid */
};
struct cb_compound_hdr_arg {
unsigned int taglen;
const char *tag;
unsigned int minorversion;
unsigned int cb_ident; /* v4.0 callback identifier */
unsigned nops;
};
struct cb_compound_hdr_res {
__be32 *status;
unsigned int taglen;
const char *tag;
__be32 *nops;
};
struct cb_getattrargs {
struct sockaddr *addr;
struct nfs_fh fh;
uint32_t bitmap[2];
};
struct cb_getattrres {
__be32 status;
uint32_t bitmap[2];
uint64_t size;
uint64_t change_attr;
struct timespec ctime;
struct timespec mtime;
};
struct cb_recallargs {
struct sockaddr *addr;
struct nfs_fh fh;
nfs4_stateid stateid;
uint32_t truncate;
};
#if defined(CONFIG_NFS_V4_1)
struct referring_call {
uint32_t rc_sequenceid;
uint32_t rc_slotid;
};
struct referring_call_list {
struct nfs4_sessionid rcl_sessionid;
uint32_t rcl_nrefcalls;
struct referring_call *rcl_refcalls;
};
struct cb_sequenceargs {
struct sockaddr *csa_addr;
struct nfs4_sessionid csa_sessionid;
uint32_t csa_sequenceid;
uint32_t csa_slotid;
uint32_t csa_highestslotid;
uint32_t csa_cachethis;
uint32_t csa_nrclists;
struct referring_call_list *csa_rclists;
};
struct cb_sequenceres {
__be32 csr_status;
struct nfs4_sessionid csr_sessionid;
uint32_t csr_sequenceid;
uint32_t csr_slotid;
uint32_t csr_highestslotid;
uint32_t csr_target_highestslotid;
};
extern __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
struct cb_sequenceres *res,
struct cb_process_state *cps);
extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation,
const nfs4_stateid *stateid);
#define RCA4_TYPE_MASK_RDATA_DLG 0
#define RCA4_TYPE_MASK_WDATA_DLG 1
#define RCA4_TYPE_MASK_DIR_DLG 2
#define RCA4_TYPE_MASK_FILE_LAYOUT 3
#define RCA4_TYPE_MASK_BLK_LAYOUT 4
#define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN 8
#define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX 9
#define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12
#define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15
#define RCA4_TYPE_MASK_ALL 0xf31f
struct cb_recallanyargs {
struct sockaddr *craa_addr;
uint32_t craa_objs_to_keep;
uint32_t craa_type_mask;
};
extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args,
void *dummy,
struct cb_process_state *cps);
struct cb_recallslotargs {
struct sockaddr *crsa_addr;
uint32_t crsa_target_max_slots;
};
extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args,
void *dummy,
struct cb_process_state *cps);
struct cb_layoutrecallargs {
struct sockaddr *cbl_addr;
uint32_t cbl_recall_type;
uint32_t cbl_layout_type;
uint32_t cbl_layoutchanged;
union {
struct {
struct nfs_fh cbl_fh;
struct pnfs_layout_range cbl_range;
nfs4_stateid cbl_stateid;
};
struct nfs_fsid cbl_fsid;
};
};
extern unsigned nfs4_callback_layoutrecall(
struct cb_layoutrecallargs *args,
void *dummy, struct cb_process_state *cps);
extern void nfs4_check_drain_bc_complete(struct nfs4_session *ses);
extern void nfs4_cb_take_slot(struct nfs_client *clp);
#endif /* CONFIG_NFS_V4_1 */
extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args,
struct cb_getattrres *res,
struct cb_process_state *cps);
extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
struct cb_process_state *cps);
#ifdef CONFIG_NFS_V4
extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
extern void nfs_callback_down(int minorversion);
extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation,
const nfs4_stateid *stateid);
extern int nfs4_set_callback_sessionid(struct nfs_client *clp);
#endif /* CONFIG_NFS_V4 */
/*
* nfs41: Callbacks are expected to not cause substantial latency,
* so we limit their concurrency to 1 by setting up the maximum number
* of slots for the backchannel.
*/
#define NFS41_BC_MIN_CALLBACKS 1
#define NFS41_BC_MAX_CALLBACKS 1
extern unsigned int nfs_callback_set_tcpport;
extern unsigned short nfs_callback_tcpport;
extern unsigned short nfs_callback_tcpport6;
#endif /* __LINUX_FS_NFS_CALLBACK_H */
|
