mirror of
https://git.FreeBSD.org/src.git
synced 2024-11-25 07:49:18 +00:00
86 lines
3.1 KiB
C
86 lines
3.1 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2008 Isilon Inc http://www.isilon.com/
|
|
* Authors: Doug Rabson <dfr@rabson.org>
|
|
* Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _RPC_REPLAY_H
|
|
#define _RPC_REPLAY_H
|
|
|
|
enum replay_state {
|
|
RS_NEW, /* new request - caller should execute */
|
|
RS_DONE, /* request was executed and reply sent */
|
|
RS_INPROGRESS, /* request is being executed now */
|
|
RS_ERROR /* allocation or other failure */
|
|
};
|
|
|
|
struct replay_cache;
|
|
|
|
/*
|
|
* Create a new replay cache.
|
|
*/
|
|
struct replay_cache *replay_newcache(size_t);
|
|
|
|
/*
|
|
* Set the replay cache size.
|
|
*/
|
|
void replay_setsize(struct replay_cache *, size_t);
|
|
|
|
/*
|
|
* Free a replay cache. Caller must ensure that no cache entries are
|
|
* in-progress.
|
|
*/
|
|
void replay_freecache(struct replay_cache *rc);
|
|
|
|
/*
|
|
* Check a replay cache for a message from a given address.
|
|
*
|
|
* If this is a new request, RS_NEW is returned. Caller should call
|
|
* replay_setreply with the results of the request.
|
|
*
|
|
* If this is a request which is currently executing
|
|
* (i.e. replay_setreply hasn't been called for it yet), RS_INPROGRESS
|
|
* is returned. The caller should silently drop the request.
|
|
*
|
|
* If a reply to this message already exists, *repmsg and *mp are set
|
|
* to point at the reply and, RS_DONE is returned. The caller should
|
|
* re-send this reply.
|
|
*
|
|
* If the attempt to update the replay cache or copy a replay failed
|
|
* for some reason (typically memory shortage), RS_ERROR is returned.
|
|
*/
|
|
enum replay_state replay_find(struct replay_cache *rc,
|
|
struct rpc_msg *msg, struct sockaddr *addr,
|
|
struct rpc_msg *repmsg, struct mbuf **mp);
|
|
|
|
/*
|
|
* Call this after executing a request to record the reply.
|
|
*/
|
|
void replay_setreply(struct replay_cache *rc,
|
|
struct rpc_msg *repmsg, struct sockaddr *addr, struct mbuf *m);
|
|
|
|
#endif /* !_RPC_REPLAY_H */
|