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
|
/*
Unix SMB/CIFS implementation.
messages.c header
Copyright (C) Andrew Tridgell 2000
Copyright (C) 2001, 2002 by Martin Pool
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _MESSAGES_H_
#define _MESSAGES_H_
/* change the message version with any incompatible changes in the protocol */
#define MESSAGE_VERSION 2
/*
* Special flags passed to message_send. Allocated from the top, lets see when
* it collides with the message types in the lower 16 bits :-)
*/
/*
* Under high load, this message can be dropped. Use for notify-style
* messages that are not critical for correct operation.
*/
#define MSG_FLAG_LOWPRIORITY 0x80000000
/* Flags to classify messages - used in message_send_all() */
/* Sender will filter by flag. */
#define FLAG_MSG_GENERAL 0x0001
#define FLAG_MSG_SMBD 0x0002
#define FLAG_MSG_NMBD 0x0004
#define FLAG_MSG_WINBIND 0x0008
#define FLAG_MSG_PRINT_GENERAL 0x0010
/* dbwrap messages 4001-4999 */
#define FLAG_MSG_DBWRAP 0x0020
/*
* ctdb gives us 64-bit server ids for messaging_send. This is done to avoid
* pid clashes and to be able to register for special messages like "all
* smbds".
*
* Normal individual server id's have the upper 32 bits to 0, I picked "1" for
* Samba, other subsystems might use something else.
*/
#define MSG_SRVID_SAMBA 0x0000000100000000LL
#include "librpc/gen_ndr/server_id.h"
#ifdef CLUSTER_SUPPORT
#define MSG_BROADCAST_PID_STR "0:0"
#else
#define MSG_BROADCAST_PID_STR "0"
#endif
struct messaging_context;
struct messaging_rec;
/*
* struct messaging_context belongs to messages.c, but because we still have
* messaging_dispatch, we need it here. Once we get rid of signals for
* notifying processes, this will go.
*/
struct messaging_context {
struct server_id id;
struct tevent_context *event_ctx;
struct messaging_callback *callbacks;
struct messaging_backend *local;
struct messaging_backend *remote;
};
struct messaging_backend {
NTSTATUS (*send_fn)(struct messaging_context *msg_ctx,
struct server_id pid, int msg_type,
const DATA_BLOB *data,
struct messaging_backend *backend);
void *private_data;
};
NTSTATUS messaging_tdb_init(struct messaging_context *msg_ctx,
TALLOC_CTX *mem_ctx,
struct messaging_backend **presult);
bool messaging_tdb_parent_init(TALLOC_CTX *mem_ctx);
void *messaging_tdb_event(TALLOC_CTX *mem_ctx, struct messaging_context *msg,
struct tevent_context *ev);
NTSTATUS messaging_ctdbd_init(struct messaging_context *msg_ctx,
TALLOC_CTX *mem_ctx,
struct messaging_backend **presult);
struct ctdbd_connection *messaging_ctdbd_connection(void);
bool message_send_all(struct messaging_context *msg_ctx,
int msg_type,
const void *buf, size_t len,
int *n_sent);
struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx,
struct tevent_context *ev);
struct server_id messaging_server_id(const struct messaging_context *msg_ctx);
/*
* re-init after a fork
*/
NTSTATUS messaging_reinit(struct messaging_context *msg_ctx);
NTSTATUS messaging_register(struct messaging_context *msg_ctx,
void *private_data,
uint32_t msg_type,
void (*fn)(struct messaging_context *msg,
void *private_data,
uint32_t msg_type,
struct server_id server_id,
DATA_BLOB *data));
void messaging_deregister(struct messaging_context *ctx, uint32_t msg_type,
void *private_data);
NTSTATUS messaging_send(struct messaging_context *msg_ctx,
struct server_id server,
uint32_t msg_type, const DATA_BLOB *data);
NTSTATUS messaging_send_buf(struct messaging_context *msg_ctx,
struct server_id server, uint32_t msg_type,
const uint8_t *buf, size_t len);
void messaging_dispatch_rec(struct messaging_context *msg_ctx,
struct messaging_rec *rec);
#include "librpc/gen_ndr/ndr_messaging.h"
#endif
|
