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77cccbc6f4
This will replace message_send_all. With messaging_dgm_forall we have a local broadcast mechanism, and ctdb can also broadcast everywhere. So there's no need for a separate traverse/send mechanism. There's no good error reporting mechanism for broadcasting, so make this function void. This drops the message_type filtering. I believe that this does not matter in practice, since messaging is a lot cheaper with dgm instead of the old tdb based messaging. If someone presents a use case where this matters, nowadays I'd much rather extend the messaging_dgm lock file format (where the unique id lives right now) with the filter bits. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
129 lines
4.4 KiB
C
129 lines
4.4 KiB
C
/*
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Unix SMB/CIFS implementation.
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messages.c header
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Copyright (C) Andrew Tridgell 2000
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Copyright (C) 2001, 2002 by Martin Pool
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _MESSAGES_H_
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#define _MESSAGES_H_
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/* change the message version with any incompatible changes in the protocol */
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#define MESSAGE_VERSION 2
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/*
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* Special flags passed to message_send. Allocated from the top, lets see when
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* it collides with the message types in the lower 16 bits :-)
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*/
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/*
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* Under high load, this message can be dropped. Use for notify-style
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* messages that are not critical for correct operation.
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*/
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#define MSG_FLAG_LOWPRIORITY 0x80000000
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#include "librpc/gen_ndr/server_id.h"
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#include "lib/util/data_blob.h"
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#include "system/network.h"
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#define MSG_BROADCAST_PID_STR "0:0"
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struct messaging_context;
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struct messaging_rec;
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struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev);
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NTSTATUS messaging_init_client(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct messaging_context **pmsg_ctx);
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struct server_id messaging_server_id(const struct messaging_context *msg_ctx);
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struct tevent_context *messaging_tevent_context(
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struct messaging_context *msg_ctx);
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struct server_id_db *messaging_names_db(struct messaging_context *msg_ctx);
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/*
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* re-init after a fork
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*/
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NTSTATUS messaging_reinit(struct messaging_context *msg_ctx);
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NTSTATUS messaging_register(struct messaging_context *msg_ctx,
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void *private_data,
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uint32_t msg_type,
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void (*fn)(struct messaging_context *msg,
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void *private_data,
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uint32_t msg_type,
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struct server_id server_id,
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DATA_BLOB *data));
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void messaging_deregister(struct messaging_context *ctx, uint32_t msg_type,
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void *private_data);
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/**
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* CAVEAT:
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*
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* While the messaging_send*() functions are synchronuous by API,
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* they trigger a tevent-based loop upon sending bigger messages.
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*
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* Hence callers should not use these in purely synchonous code,
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* but run a tevent_loop instead.
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*/
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NTSTATUS messaging_send(struct messaging_context *msg_ctx,
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struct server_id server,
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uint32_t msg_type, const DATA_BLOB *data);
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NTSTATUS messaging_send_buf(struct messaging_context *msg_ctx,
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struct server_id server, uint32_t msg_type,
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const uint8_t *buf, size_t len);
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int messaging_send_iov_from(struct messaging_context *msg_ctx,
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struct server_id src, struct server_id dst,
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uint32_t msg_type,
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const struct iovec *iov, int iovlen,
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const int *fds, size_t num_fds);
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NTSTATUS messaging_send_iov(struct messaging_context *msg_ctx,
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struct server_id server, uint32_t msg_type,
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const struct iovec *iov, int iovlen,
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const int *fds, size_t num_fds);
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void messaging_send_all(struct messaging_context *msg_ctx,
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int msg_type, const void *buf, size_t len);
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struct tevent_req *messaging_filtered_read_send(
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TALLOC_CTX *mem_ctx, struct tevent_context *ev,
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struct messaging_context *msg_ctx,
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bool (*filter)(struct messaging_rec *rec, void *private_data),
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void *private_data);
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int messaging_filtered_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
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struct messaging_rec **presult);
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struct tevent_req *messaging_read_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct messaging_context *msg,
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uint32_t msg_type);
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int messaging_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
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struct messaging_rec **presult);
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int messaging_cleanup(struct messaging_context *msg_ctx, pid_t pid);
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bool messaging_parent_dgm_cleanup_init(struct messaging_context *msg);
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struct messaging_rec *messaging_rec_create(
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TALLOC_CTX *mem_ctx, struct server_id src, struct server_id dst,
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uint32_t msg_type, const struct iovec *iov, int iovlen,
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const int *fds, size_t num_fds);
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#include "librpc/gen_ndr/ndr_messaging.h"
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#endif
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