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an item may be queued and processed later. While this is OK for mbufs, this is a problem for control messages. In the framework: - Add optional callback function pointer to an item. When item gets applied the callback is executed from ng_apply_item(). - Add new flag NG_PROGRESS. If this flag is supplied, then return EINPROGRESS instead of 0 in case if item failed to deliver synchronously and was queued. - Honor NG_PROGRESS in ng_snd_item(). In ng_socket: - When userland sends control message add callback to the item. - If ng_snd_item() returns EINPROGRESS, then sleep. This change fixes possible races in ngctl(8) scripts. Reviewed by: julian Approved by: re (scottl)
69 lines
2.8 KiB
C
69 lines
2.8 KiB
C
/*
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* netgraph.h
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*/
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/*-
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* Copyright (c) 1996-1999 Whistle Communications, Inc.
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* All rights reserved.
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*
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* Subject to the following obligations and disclaimer of warranty, use and
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* redistribution of this software, in source or object code forms, with or
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* without modifications are expressly permitted by Whistle Communications;
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* provided, however, that:
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* 1. Any and all reproductions of the source or object code must include the
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* copyright notice above and the following disclaimer of warranties; and
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* 2. No rights are granted, in any manner or form, to use Whistle
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* Communications, Inc. trademarks, including the mark "WHISTLE
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* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
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* such appears in the above copyright notice or in the software.
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*
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* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
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* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
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* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
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* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
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* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
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* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
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* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
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* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
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* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Julian Elischer <julian@freebsd.org>
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*
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* $FreeBSD$
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* $Whistle: ng_socketvar.h,v 1.1 1999/01/20 21:35:39 archie Exp $
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*/
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#ifndef _NETGRAPH_NG_SOCKETVAR_H_
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#define _NETGRAPH_NG_SOCKETVAR_H_
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/* Netgraph protocol control block for each socket */
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struct ngpcb {
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struct socket *ng_socket; /* the socket */
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struct ngsock *sockdata; /* netgraph info */
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LIST_ENTRY(ngpcb) socks; /* linked list of sockets */
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int type; /* NG_CONTROL or NG_DATA */
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};
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/* Per-node private data */
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struct ngsock {
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struct ng_node *node; /* the associated netgraph node */
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struct ngpcb *datasock; /* optional data socket */
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struct ngpcb *ctlsock; /* optional control socket */
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int flags;
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int refs;
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struct mtx mtx; /* mtx to wait on */
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int error; /* place to store error */
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};
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#define NGS_FLAG_NOLINGER 1 /* close with last hook */
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#endif /* _NETGRAPH_NG_SOCKETVAR_H_ */
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