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
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef __RPC_CLNT_H
#define __RPC_CLNT_H
#include "stack.h"
#include "rpc-transport.h"
#include "timer.h"
#include "xdr-common.h"
typedef enum {
RPC_CLNT_CONNECT,
RPC_CLNT_DISCONNECT,
RPC_CLNT_MSG,
RPC_CLNT_DESTROY
} rpc_clnt_event_t;
#define SFRAME_GET_PROGNUM(sframe) (sframe->rpcreq->prog->prognum)
#define SFRAME_GET_PROGVER(sframe) (sframe->rpcreq->prog->progver)
#define SFRAME_GET_PROCNUM(sframe) (sframe->rpcreq->procnum)
struct xptr_clnt;
struct rpc_req;
struct rpc_clnt;
struct rpc_clnt_config;
struct rpc_clnt_program;
typedef int (*rpc_clnt_notify_t) (struct rpc_clnt *rpc, void *mydata,
rpc_clnt_event_t fn, void *data);
typedef int (*fop_cbk_fn_t) (struct rpc_req *req, struct iovec *iov, int count,
void *myframe);
typedef int (*clnt_fn_t) (call_frame_t *fr, xlator_t *xl, void *args);
struct saved_frame {
union {
struct list_head list;
struct {
struct saved_frame *frame_next;
struct saved_frame *frame_prev;
};
};
void *capital_this;
void *frame;
struct timeval saved_at;
struct rpc_req *rpcreq;
rpc_transport_rsp_t rsp;
};
struct saved_frames {
int64_t count;
struct saved_frame sf;
struct saved_frame lk_sf;
};
/* Initialized by procnum */
typedef struct rpc_clnt_procedure {
char *procname;
clnt_fn_t fn;
} rpc_clnt_procedure_t;
typedef struct rpc_clnt_program {
char *progname;
int prognum;
int progver;
rpc_clnt_procedure_t *proctable;
char **procnames;
int numproc;
} rpc_clnt_prog_t;
typedef int (*rpcclnt_cb_fn) (struct rpc_clnt *rpc, void *mydata, void *data);
/* The descriptor for each procedure/actor that runs
* over the RPC service.
*/
typedef struct rpcclnt_actor_desc {
char procname[32];
int procnum;
rpcclnt_cb_fn actor;
} rpcclnt_cb_actor_t;
/* Describes a program and its version along with the function pointers
* required to handle the procedures/actors of each program/version.
* Never changed ever by any thread so no need for a lock.
*/
typedef struct rpcclnt_cb_program {
char progname[32];
int prognum;
int progver;
rpcclnt_cb_actor_t *actors; /* All procedure handlers */
int numactors; /* Num actors in actor array */
/* Program specific state handed to actors */
void *private;
/* list member to link to list of registered services with rpc_clnt */
struct list_head program;
/* Needed for passing back in cb_actor */
void *mydata;
} rpcclnt_cb_program_t;
typedef struct rpc_auth_data {
int flavour;
int datalen;
char authdata[GF_MAX_AUTH_BYTES];
} rpc_auth_data_t;
struct rpc_clnt_config {
int rpc_timeout;
int remote_port;
char * remote_host;
};
#define rpc_auth_flavour(au) ((au).flavour)
struct rpc_clnt_connection {
pthread_mutex_t lock;
rpc_transport_t *trans;
struct rpc_clnt_config config;
gf_timer_t *reconnect;
gf_timer_t *timer;
gf_timer_t *ping_timer;
struct rpc_clnt *rpc_clnt;
char connected;
struct saved_frames *saved_frames;
int32_t frame_timeout;
struct timeval last_sent;
struct timeval last_received;
int32_t ping_started;
char *name;
int32_t ping_timeout;
uint64_t pingcnt;
uint64_t msgcnt;
};
typedef struct rpc_clnt_connection rpc_clnt_connection_t;
struct rpc_req {
rpc_clnt_connection_t *conn;
uint32_t xid;
struct iovec req[2];
int reqcnt;
struct iobref *req_iobref;
struct iovec rsp[2];
int rspcnt;
struct iobref *rsp_iobref;
int rpc_status;
rpc_auth_data_t verf;
rpc_clnt_prog_t *prog;
int procnum;
fop_cbk_fn_t cbkfn;
void *conn_private;
};
typedef struct rpc_clnt {
pthread_mutex_t lock;
rpc_clnt_notify_t notifyfn;
rpc_clnt_connection_t conn;
void *mydata;
uint64_t xid;
/* list of cb programs registered with rpc-clnt */
struct list_head programs;
/* Memory pool for rpc_req_t */
struct mem_pool *reqpool;
struct mem_pool *saved_frames_pool;
glusterfs_ctx_t *ctx;
int refcount;
int auth_null;
char disabled;
} rpc_clnt_t;
struct rpc_clnt *rpc_clnt_new (dict_t *options, glusterfs_ctx_t *ctx,
char *name, uint32_t reqpool_size);
int rpc_clnt_start (struct rpc_clnt *rpc);
int rpc_clnt_register_notify (struct rpc_clnt *rpc, rpc_clnt_notify_t fn,
void *mydata);
/* Some preconditions related to vectors holding responses.
* @rsphdr: should contain pointer to buffer which can hold response header
* and length of the program header. In case of procedures whose
* respnose size is not bounded (eg., glusterfs lookup), the length
* should be equal to size of buffer.
* @rsp_payload: should contain pointer and length of the bu
*
* 1. Both @rsp_hdr and @rsp_payload are optional.
* 2. The user of rpc_clnt_submit, if wants response hdr and payload in its own
* buffers, then it has to populate @rsphdr and @rsp_payload.
* 3. when @rsp_payload is not NULL, @rsphdr should
* also be filled with pointer to buffer to hold header and length
* of the header.
*/
int rpc_clnt_submit (struct rpc_clnt *rpc, rpc_clnt_prog_t *prog,
int procnum, fop_cbk_fn_t cbkfn,
struct iovec *proghdr, int proghdrcount,
struct iovec *progpayload, int progpayloadcount,
struct iobref *iobref, void *frame, struct iovec *rsphdr,
int rsphdr_count, struct iovec *rsp_payload,
int rsp_payload_count, struct iobref *rsp_iobref);
struct rpc_clnt *
rpc_clnt_ref (struct rpc_clnt *rpc);
struct rpc_clnt *
rpc_clnt_unref (struct rpc_clnt *rpc);
int rpc_clnt_connection_cleanup (rpc_clnt_connection_t *conn);
void rpc_clnt_set_connected (rpc_clnt_connection_t *conn);
void rpc_clnt_unset_connected (rpc_clnt_connection_t *conn);
void rpc_clnt_reconnect (void *trans_ptr);
void rpc_clnt_reconfig (struct rpc_clnt *rpc, struct rpc_clnt_config *config);
/* All users of RPC services should use this API to register their
* procedure handlers.
*/
int rpcclnt_cbk_program_register (struct rpc_clnt *svc,
rpcclnt_cb_program_t *program, void *mydata);
void
rpc_clnt_disable (struct rpc_clnt *rpc);
void
rpc_clnt_disconnect (struct rpc_clnt *rpc);
char
rpc_clnt_is_disabled (struct rpc_clnt *rpc);
#endif /* !_RPC_CLNT_H */
|
