2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 2000
5 Copyright (C) 2001, 2002 by Martin Pool
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 /* change the message version with any incompatible changes in the protocol */
25 #define MESSAGE_VERSION 2
28 * Special flags passed to message_send. Allocated from the top, lets see when
29 * it collides with the message types in the lower 16 bits :-)
33 * Under high load, this message can be dropped. Use for notify-style
34 * messages that are not critical for correct operation.
36 #define MSG_FLAG_LOWPRIORITY 0x80000000
39 /* Flags to classify messages - used in message_send_all() */
40 /* Sender will filter by flag. */
42 #define FLAG_MSG_GENERAL 0x0001
43 #define FLAG_MSG_SMBD 0x0002
44 #define FLAG_MSG_NMBD 0x0004
45 #define FLAG_MSG_PRINT_NOTIFY 0x0008
46 #define FLAG_MSG_PRINT_GENERAL 0x0010
47 /* dbwrap messages 4001-4999 */
48 #define FLAG_MSG_DBWRAP 0x0020
52 * Virtual Node Numbers are identifying a node within a cluster. Ctdbd sets
53 * this, we retrieve our vnn from it.
56 #define NONCLUSTER_VNN (0xFFFFFFFF)
59 * ctdb gives us 64-bit server ids for messaging_send. This is done to avoid
60 * pid clashes and to be able to register for special messages like "all
63 * Normal individual server id's have the upper 32 bits to 0, I picked "1" for
64 * Samba, other subsystems might use something else.
67 #define MSG_SRVID_SAMBA 0x0000000100000000LL
72 #ifdef CLUSTER_SUPPORT
77 #ifdef CLUSTER_SUPPORT
78 #define MSG_BROADCAST_PID_STR "0:0"
80 #define MSG_BROADCAST_PID_STR "0"
83 struct messaging_context;
87 * struct messaging_context belongs to messages.c, but because we still have
88 * messaging_dispatch, we need it here. Once we get rid of signals for
89 * notifying processes, this will go.
92 struct messaging_context {
94 struct event_context *event_ctx;
95 struct messaging_callback *callbacks;
97 struct messaging_backend *local;
98 struct messaging_backend *remote;
101 struct messaging_backend {
102 NTSTATUS (*send_fn)(struct messaging_context *msg_ctx,
103 struct server_id pid, int msg_type,
104 const DATA_BLOB *data,
105 struct messaging_backend *backend);
109 NTSTATUS messaging_tdb_init(struct messaging_context *msg_ctx,
111 struct messaging_backend **presult);
113 NTSTATUS messaging_ctdbd_init(struct messaging_context *msg_ctx,
115 struct messaging_backend **presult);
116 struct ctdbd_connection *messaging_ctdbd_connection(void);
118 bool message_send_all(struct messaging_context *msg_ctx,
120 const void *buf, size_t len,
122 struct event_context *messaging_event_context(struct messaging_context *msg_ctx);
123 struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx,
124 struct server_id server_id,
125 struct event_context *ev);
128 * re-init after a fork
130 NTSTATUS messaging_reinit(struct messaging_context *msg_ctx);
132 NTSTATUS messaging_register(struct messaging_context *msg_ctx,
135 void (*fn)(struct messaging_context *msg,
138 struct server_id server_id,
140 void messaging_deregister(struct messaging_context *ctx, uint32_t msg_type,
142 NTSTATUS messaging_send(struct messaging_context *msg_ctx,
143 struct server_id server,
144 uint32_t msg_type, const DATA_BLOB *data);
145 NTSTATUS messaging_send_buf(struct messaging_context *msg_ctx,
146 struct server_id server, uint32_t msg_type,
147 const uint8 *buf, size_t len);
148 void messaging_dispatch_rec(struct messaging_context *msg_ctx,
149 struct messaging_rec *rec);