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  */
   35 
   36 #include <sys/cdefs.h>
   37 __FBSDID("$FreeBSD: releng/5.2/sys/kern/uipc_domain.c 119698 2003-09-02 20:59:23Z sam $");
   38 
   39 #include <sys/param.h>
   40 #include <sys/socket.h>
   41 #include <sys/protosw.h>
   42 #include <sys/domain.h>
   43 #include <sys/mbuf.h>
   44 #include <sys/kernel.h>
   45 #include <sys/lock.h>
   46 #include <sys/mutex.h>
   47 #include <sys/socketvar.h>
   48 #include <sys/systm.h>
   49 #include <vm/uma.h>
   50 
   51 /*
   52  * System initialization
   53  *
   54  * Note: domain initialization takes place on a per domain basis
   55  * as a result of traversing a SYSINIT linker set.  Most likely,
   56  * each domain would want to call DOMAIN_SET(9) itself, which
   57  * would cause the domain to be added just after domaininit()
   58  * is called during startup.
   59  *
   60  * See DOMAIN_SET(9) for details on its use.
   61  */
   62 
   63 static void domaininit(void *);
   64 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
   65 
   66 static struct callout pffast_callout;
   67 static struct callout pfslow_callout;
   68 
   69 static void     pffasttimo(void *);
   70 static void     pfslowtimo(void *);
   71 
   72 struct domain *domains;         /* registered protocol domains */
   73 struct mtx dom_mtx;             /* domain list lock */
   74 MTX_SYSINIT(domain, &dom_mtx, "domain list", MTX_DEF);
   75 
   76 /*
   77  * Add a new protocol domain to the list of supported domains
   78  * Note: you cant unload it again because  a socket may be using it.
   79  * XXX can't fail at this time.
   80  */
   81 static void
   82 net_init_domain(struct domain *dp)
   83 {
   84         struct protosw *pr;
   85 
   86         if (dp->dom_init)
   87                 (*dp->dom_init)();
   88         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++){
   89                 if (pr->pr_usrreqs == 0)
   90                         panic("domaininit: %ssw[%d] has no usrreqs!",
   91                               dp->dom_name, 
   92                               (int)(pr - dp->dom_protosw));
   93                 if (pr->pr_init)
   94                         (*pr->pr_init)();
   95         }
   96         /*
   97          * update global information about maximums
   98          */
   99         max_hdr = max_linkhdr + max_protohdr;
  100         max_datalen = MHLEN - max_hdr;
  101 }
  102 
  103 /*
  104  * Add a new protocol domain to the list of supported domains
  105  * Note: you cant unload it again because  a socket may be using it.
  106  * XXX can't fail at this time.
  107  */
  108 void
  109 net_add_domain(void *data)
  110 {
  111         struct domain *dp;
  112 
  113         dp = (struct domain *)data;
  114         mtx_lock(&dom_mtx);
  115         dp->dom_next = domains;
  116         domains = dp;
  117         mtx_unlock(&dom_mtx);
  118         net_init_domain(dp);
  119 }
  120 
  121 /* ARGSUSED*/
  122 static void
  123 domaininit(void *dummy)
  124 {
  125         /*
  126          * Before we do any setup, make sure to initialize the
  127          * zone allocator we get struct sockets from.
  128          */
  129 
  130         socket_zone = uma_zcreate("socket", sizeof(struct socket), NULL, NULL,
  131             NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
  132         uma_zone_set_max(socket_zone, maxsockets);
  133 
  134         if (max_linkhdr < 16)           /* XXX */
  135                 max_linkhdr = 16;
  136 
  137         callout_init(&pffast_callout, 0);
  138         callout_init(&pfslow_callout, 0);
  139 
  140         callout_reset(&pffast_callout, 1, pffasttimo, NULL);
  141         callout_reset(&pfslow_callout, 1, pfslowtimo, NULL);
  142 }
  143 
  144 
  145 struct protosw *
  146 pffindtype(family, type)
  147         int family;
  148         int type;
  149 {
  150         register struct domain *dp;
  151         register struct protosw *pr;
  152 
  153         for (dp = domains; dp; dp = dp->dom_next)
  154                 if (dp->dom_family == family)
  155                         goto found;
  156         return (0);
  157 found:
  158         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  159                 if (pr->pr_type && pr->pr_type == type)
  160                         return (pr);
  161         return (0);
  162 }
  163 
  164 struct protosw *
  165 pffindproto(family, protocol, type)
  166         int family;
  167         int protocol;
  168         int type;
  169 {
  170         register struct domain *dp;
  171         register struct protosw *pr;
  172         struct protosw *maybe = 0;
  173 
  174         if (family == 0)
  175                 return (0);
  176         for (dp = domains; dp; dp = dp->dom_next)
  177                 if (dp->dom_family == family)
  178                         goto found;
  179         return (0);
  180 found:
  181         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
  182                 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
  183                         return (pr);
  184 
  185                 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
  186                     pr->pr_protocol == 0 && maybe == (struct protosw *)0)
  187                         maybe = pr;
  188         }
  189         return (maybe);
  190 }
  191 
  192 void
  193 pfctlinput(cmd, sa)
  194         int cmd;
  195         struct sockaddr *sa;
  196 {
  197         register struct domain *dp;
  198         register struct protosw *pr;
  199 
  200         for (dp = domains; dp; dp = dp->dom_next)
  201                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  202                         if (pr->pr_ctlinput)
  203                                 (*pr->pr_ctlinput)(cmd, sa, (void *)0);
  204 }
  205 
  206 void
  207 pfctlinput2(cmd, sa, ctlparam)
  208         int cmd;
  209         struct sockaddr *sa;
  210         void *ctlparam;
  211 {
  212         struct domain *dp;
  213         struct protosw *pr;
  214 
  215         if (!sa)
  216                 return;
  217         for (dp = domains; dp; dp = dp->dom_next) {
  218                 /*
  219                  * the check must be made by xx_ctlinput() anyways, to
  220                  * make sure we use data item pointed to by ctlparam in
  221                  * correct way.  the following check is made just for safety.
  222                  */
  223                 if (dp->dom_family != sa->sa_family)
  224                         continue;
  225 
  226                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  227                         if (pr->pr_ctlinput)
  228                                 (*pr->pr_ctlinput)(cmd, sa, ctlparam);
  229         }
  230 }
  231 
  232 static void
  233 pfslowtimo(arg)
  234         void *arg;
  235 {
  236         register struct domain *dp;
  237         register struct protosw *pr;
  238 
  239         for (dp = domains; dp; dp = dp->dom_next)
  240                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  241                         if (pr->pr_slowtimo)
  242                                 (*pr->pr_slowtimo)();
  243         callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL);
  244 }
  245 
  246 static void
  247 pffasttimo(arg)
  248         void *arg;
  249 {
  250         register struct domain *dp;
  251         register struct protosw *pr;
  252 
  253         for (dp = domains; dp; dp = dp->dom_next)
  254                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  255                         if (pr->pr_fasttimo)
  256                                 (*pr->pr_fasttimo)();
  257         callout_reset(&pffast_callout, hz/5, pffasttimo, NULL);
  258 }

Cache object: 427b196bd4688d58c8071801c2eca8cf

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

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sys/kern/uipc_domain.c