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Diffstat (limited to 'source3/include/messages.h')
| -rw-r--r-- | source3/include/messages.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/source3/include/messages.h b/source3/include/messages.h new file mode 100644 index 0000000000..db805a2093 --- /dev/null +++ b/source3/include/messages.h @@ -0,0 +1,153 @@ +/* + 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_PRINT_NOTIFY 0x0008 +#define FLAG_MSG_PRINT_GENERAL 0x0010 +/* dbwrap messages 4001-4999 */ +#define FLAG_MSG_DBWRAP 0x0020 + + +/* + * Virtual Node Numbers are identifying a node within a cluster. Ctdbd sets + * this, we retrieve our vnn from it. + */ + +#define NONCLUSTER_VNN (0xFFFFFFFF) + +/* + * 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 + + +struct server_id { + pid_t pid; +#ifdef CLUSTER_SUPPORT + uint32 vnn; +#endif +}; + +#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 data_blob; + +/* + * 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 event_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 struct 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); +void message_dispatch(struct messaging_context *msg_ctx); + +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 event_context *messaging_event_context(struct messaging_context *msg_ctx); +struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx, + struct server_id server_id, + struct event_context *ev); + +/* + * 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, + struct 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 struct data_blob *data); +NTSTATUS messaging_send_buf(struct messaging_context *msg_ctx, + struct server_id server, uint32_t msg_type, + const uint8 *buf, size_t len); +void messaging_dispatch_rec(struct messaging_context *msg_ctx, + struct messaging_rec *rec); + +#endif |