44e33a0758
for virtualization. Instead of initializing the affected global variables at instatiation, assign initial values to them in initializer functions. As a rule, initialization at instatiation for such variables should never be introduced again from now on. Furthermore, enclose all instantiations of such global variables in #ifdef VIMAGE_GLOBALS blocks. Essentialy, this change should have zero functional impact. In the next phase of merging network stack virtualization infrastructure from p4/vimage branch, the new initialization methology will allow us to switch between using global variables and their counterparts residing in virtualization containers with minimum code churn, and in the long run allow us to intialize multiple instances of such container structures. Discussed at: devsummit Strassburg Reviewed by: bz, julian Approved by: julian (mentor) Obtained from: //depot/projects/vimage-commit2/... X-MFC after: never Sponsored by: NLnet Foundation, The FreeBSD Foundation
121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
/*-
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)raw_cb.c 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/domain.h>
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#include <sys/lock.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/vimage.h>
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#include <net/if.h>
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#include <net/raw_cb.h>
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/*
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* Routines to manage the raw protocol control blocks.
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*
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* TODO:
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* hash lookups by protocol family/protocol + address family
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* take care of unique address problems per AF?
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* redo address binding to allow wildcards
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*/
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struct mtx rawcb_mtx;
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#ifdef VIMAGE_GLOBALS
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struct rawcb_list_head rawcb_list;
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#endif
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SYSCTL_NODE(_net, OID_AUTO, raw, CTLFLAG_RW, 0, "Raw socket infrastructure");
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static u_long raw_sendspace = RAWSNDQ;
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SYSCTL_ULONG(_net_raw, OID_AUTO, sendspace, CTLFLAG_RW, &raw_sendspace, 0,
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"Default raw socket send space");
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static u_long raw_recvspace = RAWRCVQ;
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SYSCTL_ULONG(_net_raw, OID_AUTO, recvspace, CTLFLAG_RW, &raw_recvspace, 0,
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"Default raw socket receive space");
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/*
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* Allocate a control block and a nominal amount of buffer space for the
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* socket.
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*/
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int
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raw_attach(struct socket *so, int proto)
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{
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INIT_VNET_NET(so->so_vnet);
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struct rawcb *rp = sotorawcb(so);
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int error;
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/*
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* It is assumed that raw_attach is called after space has been
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* allocated for the rawcb; consumer protocols may simply allocate
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* type struct rawcb, or a wrapper data structure that begins with a
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* struct rawcb.
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*/
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KASSERT(rp != NULL, ("raw_attach: rp == NULL"));
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error = soreserve(so, raw_sendspace, raw_recvspace);
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if (error)
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return (error);
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rp->rcb_socket = so;
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rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
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rp->rcb_proto.sp_protocol = proto;
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mtx_lock(&rawcb_mtx);
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LIST_INSERT_HEAD(&V_rawcb_list, rp, list);
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mtx_unlock(&rawcb_mtx);
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return (0);
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}
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/*
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* Detach the raw connection block and discard socket resources.
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*/
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void
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raw_detach(struct rawcb *rp)
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{
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struct socket *so = rp->rcb_socket;
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KASSERT(so->so_pcb == rp, ("raw_detach: so_pcb != rp"));
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so->so_pcb = NULL;
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mtx_lock(&rawcb_mtx);
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LIST_REMOVE(rp, list);
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mtx_unlock(&rawcb_mtx);
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free((caddr_t)(rp), M_PCB);
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}
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