The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System, Second Edition

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FreeBSD/Linux Kernel Cross Reference
sys/kern/uipc_domain.c

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    1 /*
    2  * Copyright (c) 1982, 1986, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)uipc_domain.c       8.2 (Berkeley) 10/18/93
   34  * $FreeBSD: src/sys/kern/uipc_domain.c,v 1.30 2002/05/31 11:52:30 tanimura Exp $
   35  */
   36 
   37 #include <sys/param.h>
   38 #include <sys/socket.h>
   39 #include <sys/protosw.h>
   40 #include <sys/domain.h>
   41 #include <sys/mbuf.h>
   42 #include <sys/kernel.h>
   43 #include <sys/socketvar.h>
   44 #include <sys/systm.h>
   45 #include <vm/uma.h>
   46 
   47 /*
   48  * System initialization
   49  *
   50  * Note: domain initialization takes place on a per domain basis
   51  * as a result of traversing a SYSINIT linker set.  Most likely,
   52  * each domain would want to call DOMAIN_SET(9) itself, which
   53  * would cause the domain to be added just after domaininit()
   54  * is called during startup.
   55  *
   56  * See DOMAIN_SET(9) for details on its use.
   57  */
   58 
   59 static void domaininit(void *);
   60 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
   61 
   62 static struct callout pffast_callout;
   63 static struct callout pfslow_callout;
   64 
   65 static void     pffasttimo(void *);
   66 static void     pfslowtimo(void *);
   67 
   68 struct domain *domains;
   69 
   70 /*
   71  * Add a new protocol domain to the list of supported domains
   72  * Note: you cant unload it again because  a socket may be using it.
   73  * XXX can't fail at this time.
   74  */
   75 static void
   76 net_init_domain(struct domain *dp)
   77 {
   78         register struct protosw *pr;
   79         int     s;
   80 
   81         s = splnet();
   82         if (dp->dom_init)
   83                 (*dp->dom_init)();
   84         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++){
   85                 if (pr->pr_usrreqs == 0)
   86                         panic("domaininit: %ssw[%d] has no usrreqs!",
   87                               dp->dom_name, 
   88                               (int)(pr - dp->dom_protosw));
   89                 if (pr->pr_init)
   90                         (*pr->pr_init)();
   91         }
   92         /*
   93          * update global informatio about maximums
   94          */
   95         max_hdr = max_linkhdr + max_protohdr;
   96         max_datalen = MHLEN - max_hdr;
   97         splx(s);
   98 }
   99 
  100 /*
  101  * Add a new protocol domain to the list of supported domains
  102  * Note: you cant unload it again because  a socket may be using it.
  103  * XXX can't fail at this time.
  104  */
  105 void
  106 net_add_domain(void *data)
  107 {
  108         int     s;
  109         struct domain *dp;
  110 
  111         dp = (struct domain *)data;
  112         s = splnet();
  113         dp->dom_next = domains;
  114         domains = dp;
  115         splx(s);
  116         net_init_domain(dp);
  117 }
  118 
  119 /* ARGSUSED*/
  120 static void
  121 domaininit(void *dummy)
  122 {
  123         /*
  124          * Before we do any setup, make sure to initialize the
  125          * zone allocator we get struct sockets from.
  126          */
  127 
  128         socket_zone = uma_zcreate("socket", sizeof(struct socket), NULL, NULL,
  129             NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
  130         uma_zone_set_max(socket_zone, maxsockets);
  131 
  132         if (max_linkhdr < 16)           /* XXX */
  133                 max_linkhdr = 16;
  134 
  135         callout_init(&pffast_callout, 0);
  136         callout_init(&pfslow_callout, 0);
  137 
  138         callout_reset(&pffast_callout, 1, pffasttimo, NULL);
  139         callout_reset(&pfslow_callout, 1, pfslowtimo, NULL);
  140 }
  141 
  142 
  143 struct protosw *
  144 pffindtype(family, type)
  145         int family;
  146         int type;
  147 {
  148         register struct domain *dp;
  149         register struct protosw *pr;
  150 
  151         for (dp = domains; dp; dp = dp->dom_next)
  152                 if (dp->dom_family == family)
  153                         goto found;
  154         return (0);
  155 found:
  156         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  157                 if (pr->pr_type && pr->pr_type == type)
  158                         return (pr);
  159         return (0);
  160 }
  161 
  162 struct protosw *
  163 pffindproto(family, protocol, type)
  164         int family;
  165         int protocol;
  166         int type;
  167 {
  168         register struct domain *dp;
  169         register struct protosw *pr;
  170         struct protosw *maybe = 0;
  171 
  172         if (family == 0)
  173                 return (0);
  174         for (dp = domains; dp; dp = dp->dom_next)
  175                 if (dp->dom_family == family)
  176                         goto found;
  177         return (0);
  178 found:
  179         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
  180                 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
  181                         return (pr);
  182 
  183                 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
  184                     pr->pr_protocol == 0 && maybe == (struct protosw *)0)
  185                         maybe = pr;
  186         }
  187         return (maybe);
  188 }
  189 
  190 void
  191 pfctlinput(cmd, sa)
  192         int cmd;
  193         struct sockaddr *sa;
  194 {
  195         register struct domain *dp;
  196         register struct protosw *pr;
  197 
  198         for (dp = domains; dp; dp = dp->dom_next)
  199                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  200                         if (pr->pr_ctlinput)
  201                                 (*pr->pr_ctlinput)(cmd, sa, (void *)0);
  202 }
  203 
  204 void
  205 pfctlinput2(cmd, sa, ctlparam)
  206         int cmd;
  207         struct sockaddr *sa;
  208         void *ctlparam;
  209 {
  210         struct domain *dp;
  211         struct protosw *pr;
  212 
  213         if (!sa)
  214                 return;
  215         for (dp = domains; dp; dp = dp->dom_next) {
  216                 /*
  217                  * the check must be made by xx_ctlinput() anyways, to
  218                  * make sure we use data item pointed to by ctlparam in
  219                  * correct way.  the following check is made just for safety.
  220                  */
  221                 if (dp->dom_family != sa->sa_family)
  222                         continue;
  223 
  224                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  225                         if (pr->pr_ctlinput)
  226                                 (*pr->pr_ctlinput)(cmd, sa, ctlparam);
  227         }
  228 }
  229 
  230 static void
  231 pfslowtimo(arg)
  232         void *arg;
  233 {
  234         register struct domain *dp;
  235         register struct protosw *pr;
  236 
  237         for (dp = domains; dp; dp = dp->dom_next)
  238                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  239                         if (pr->pr_slowtimo)
  240                                 (*pr->pr_slowtimo)();
  241         callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL);
  242 }
  243 
  244 static void
  245 pffasttimo(arg)
  246         void *arg;
  247 {
  248         register struct domain *dp;
  249         register struct protosw *pr;
  250 
  251         for (dp = domains; dp; dp = dp->dom_next)
  252                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  253                         if (pr->pr_fasttimo)
  254                                 (*pr->pr_fasttimo)();
  255         callout_reset(&pffast_callout, hz/5, pffasttimo, NULL);
  256 }

Cache object: d03809eec4a27edbc2828be59b0c26e9


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