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
|
/*
* Unix SMB/CIFS implementation.
* Wrap Infiniband calls.
*
* Copyright (C) Sven Oehme <oehmes@de.ibm.com> 2006
*
* Major code contributions by Peter Somogyi <psomogyi@gamax.hu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Server communication state */
enum ibw_state_ctx {
IBWS_INIT = 0, /* ctx start - after ibw_init */
IBWS_READY, /* after ibw_bind & ibw_listen */
IBWS_CONNECT_REQUEST, /* after [IBWS_READY + incoming request] */
/* => [(ibw_accept)IBWS_READY | (ibw_disconnect)STOPPED | ERROR] */
IBWS_STOPPED, /* normal stop <= ibw_disconnect+(IBWS_READY | IBWS_CONNECT_REQUEST) */
IBWS_ERROR /* abnormal state; ibw_stop must be called after this */
};
/* Connection state */
struct ibw_ctx {
void *ctx_userdata; /* see ibw_init */
enum ibw_state_ctx state;
void *internal;
struct ibw_conn *conn_list; /* 1st elem of double linked list */
};
enum ibw_state_conn {
IBWC_INIT = 0, /* conn start - internal state */
IBWC_CONNECTED, /* after ibw_accept or ibw_connect */
IBWC_DISCONNECTED, /* after ibw_disconnect */
IBWC_ERROR
};
struct ibw_conn {
struct ibw_ctx *ctx;
enum ibw_state_conn state;
void *conn_userdata; /* see ibw_connect and ibw_accept */
void *internal;
struct ibw_conn *prev, *next;
};
/*
* (name, value) pair for array param of ibw_init
*/
struct ibw_initattr {
const char *name;
const char *value;
};
/*
* Callback function definition which should inform you about
* connection state change
* This callback is invoked whenever server or client connection changes.
* Both <conn> and <ctx> can be NULL if their state didn't change.
* Return nonzero on error.
*/
typedef int (*ibw_connstate_fn_t)(struct ibw_ctx *ctx, struct ibw_conn *conn);
/*
* Callback function definition which should process incoming packets
* This callback is invoked whenever any message arrives.
* Return nonzero on error.
*
* Important: you mustn't store buf pointer for later use.
* Process its contents before returning.
*/
typedef int (*ibw_receive_fn_t)(struct ibw_conn *conn, void *buf, int n);
/*
* settings: array of (name, value) pairs
* where name is one of:
* max_send_wr [default is 256]
* max_recv_wr [default is 1024]
* <...>
*
* Must be called _ONCE_ for each node.
*
* max_msg_size is the maximum size of a message
* (max_send_wr + max_recv_wr) * max_msg_size bytes allocated per connection
*
* returns non-NULL on success
*
* talloc_free must be called for the result in IBWS_STOPPED;
* it will close resources by destructor
* connections(ibw_conn *) must have been closed prior talloc_free
*/
struct ibw_ctx *ibw_init(struct ibw_initattr *attr, int nattr,
void *ctx_userdata,
ibw_connstate_fn_t ibw_connstate,
ibw_receive_fn_t ibw_receive,
struct event_context *ectx);
/*
* Must be called in states of (IBWS_ERROR, IBWS_READY, IBWS_CONNECT_REQUEST)
*
* It will send out disconnect requests and free up ibw_conn structures.
* The ctx->state will transit to IBWS_STOPPED after every conn are disconnected.
* During that time, you mustn't send/recv/disconnect any more.
* Only after ctx->state=IBWS_STOPPED you can talloc_free the ctx.
*/
int ibw_stop(struct ibw_ctx *ctx);
/*************** connection initiation - like stream sockets *****/
/*
* works like socket bind
* needs a normal internet address here
*
* return 0 on success
*/
int ibw_bind(struct ibw_ctx *ctx, struct sockaddr_in *my_addr);
/*
* works like socket listen
* non-blocking
* enables accepting incoming connections (after IBWS_READY)
* (it doesn't touch ctx->state by itself)
*
* returns 0 on success
*/
int ibw_listen(struct ibw_ctx *ctx, int backlog);
/*
* works like socket accept
* initializes a connection to a client
* must be called when state=IBWS_CONNECT_REQUEST
*
* returns 0 on success
*
* You have +1 waiting here: you will get ibw_conn (having the
* same <conn_userdata> member) structure in ibw_connstate_fn_t.
*
* Important: you won't get remote IP address (only internal conn info)
*/
int ibw_accept(struct ibw_ctx *ctx, struct ibw_conn *conn, void *conn_userdata);
/*
* Create a new connection structure
* available for queueing ibw_send
*
* <parent> is needed to be notified by talloc destruct action.
*/
struct ibw_conn *ibw_conn_new(struct ibw_ctx *ctx, TALLOC_CTX *mem_ctx);
/*
* Needs a normal internet address here
* can be called within IBWS_READY|IBWS_CONNECT_REQUEST
*
* returns non-NULL on success
*
* You have +1 waiting here: you will get ibw_conn (having the
* same <conn_userdata> member) structure in ibw_connstate_fn_t.
*/
int ibw_connect(struct ibw_conn *conn, struct sockaddr_in *serv_addr, void *conn_userdata);
/*
* Sends out a disconnect request.
* You should process fds after calling this function
* and then process it with ibw_process_event normally
* until you get conn->state = IBWC_DISCONNECTED
*
* You mustn't talloc_free <conn> yet right after this,
* first wait for IBWC_DISCONNECTED.
*/
int ibw_disconnect(struct ibw_conn *conn);
/************ Infiniband specific event loop wrapping ******************/
/*
* You have to use this buf to fill in before send.
* It's just to avoid memcpy.in ibw_send.
* Use the same (buf, key) pair with ibw_send.
* Don't use more space than maxsize (see ibw_init).
*
* Returns 0 on success.
*/
int ibw_alloc_send_buf(struct ibw_conn *conn, void **buf, void **key, uint32_t len);
/*
* Send the message in one
* Can be invoked any times (should fit into buffers) and at any time
* (in conn->state=IBWC_CONNECTED)
* n must be less or equal than max_msg_size (see ibw_init)
*
* You mustn't use (buf, key) any more for sending.
*/
int ibw_send(struct ibw_conn *conn, void *buf, void *key, uint32_t len);
/*
* Call this after ibw_alloc_send_buf
* when you won't call ibw_send for (buf, key)
* You mustn't use (buf, key) any more.
*/
int ibw_cancel_send_buf(struct ibw_conn *conn, void *buf, void *key);
/*
* Retrieves the last error
* result: always non-zero, mustn't be freed (static)
*/
const char *ibw_getLastError(void);
|
