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


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/netgraph/ng_fec.c

Version: -  FREEBSD  -  FREEBSD11  -  FREEBSD10  -  FREEBSD9  -  FREEBSD92  -  FREEBSD91  -  FREEBSD90  -  FREEBSD8  -  FREEBSD82  -  FREEBSD81  -  FREEBSD80  -  FREEBSD7  -  FREEBSD74  -  FREEBSD73  -  FREEBSD72  -  FREEBSD71  -  FREEBSD70  -  FREEBSD6  -  FREEBSD64  -  FREEBSD63  -  FREEBSD62  -  FREEBSD61  -  FREEBSD60  -  FREEBSD5  -  FREEBSD55  -  FREEBSD54  -  FREEBSD53  -  FREEBSD52  -  FREEBSD51  -  FREEBSD50  -  FREEBSD4  -  FREEBSD3  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*
    2  * ng_fec.c
    3  */
    4 
    5 /*-
    6  * Copyright (c) 2001 Berkeley Software Design, Inc.
    7  * Copyright (c) 2000, 2001
    8  *      Bill Paul <wpaul@osd.bsdi.com>.  All rights reserved.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *      This product includes software developed by Bill Paul.
   21  * 4. Neither the name of the author nor the names of any co-contributors
   22  *    may be used to endorse or promote products derived from this software
   23  *    without specific prior written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   28  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   35  * THE POSSIBILITY OF SUCH DAMAGE.
   36  *
   37  * $FreeBSD: releng/7.4/sys/netgraph/ng_fec.c 215368 2010-11-16 04:40:03Z sobomax $
   38  */
   39 /*-
   40  * Copyright (c) 1996-1999 Whistle Communications, Inc.
   41  * All rights reserved.
   42  * 
   43  * Subject to the following obligations and disclaimer of warranty, use and
   44  * redistribution of this software, in source or object code forms, with or
   45  * without modifications are expressly permitted by Whistle Communications;
   46  * provided, however, that:
   47  * 1. Any and all reproductions of the source or object code must include the
   48  *    copyright notice above and the following disclaimer of warranties; and
   49  * 2. No rights are granted, in any manner or form, to use Whistle
   50  *    Communications, Inc. trademarks, including the mark "WHISTLE
   51  *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
   52  *    such appears in the above copyright notice or in the software.
   53  * 
   54  * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
   55  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
   56  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
   57  * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
   58  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
   59  * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
   60  * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
   61  * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
   62  * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
   63  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
   64  * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
   65  * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
   66  * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
   67  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   68  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   69  * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
   70  * OF SUCH DAMAGE.
   71  *
   72  * Author: Archie Cobbs <archie@freebsd.org>
   73  *
   74  * $Whistle: ng_fec.c,v 1.33 1999/11/01 09:24:51 julian Exp $
   75  */
   76 
   77 /*
   78  * This module implements ethernet channel bonding using the Cisco
   79  * Fast EtherChannel mechanism. Two or four ports may be combined
   80  * into a single aggregate interface.
   81  *
   82  * Interfaces are named fec0, fec1, etc.  New nodes take the
   83  * first available interface name.
   84  *
   85  * This node also includes Berkeley packet filter support.
   86  *
   87  * Note that this node doesn't need to connect to any other
   88  * netgraph nodes in order to do its work.
   89  */
   90 
   91 #include <sys/param.h>
   92 #include <sys/systm.h>
   93 #include <sys/errno.h>
   94 #include <sys/kernel.h>
   95 #include <sys/malloc.h>
   96 #include <sys/mbuf.h>
   97 #include <sys/errno.h>
   98 #include <sys/sockio.h>
   99 #include <sys/socket.h>
  100 #include <sys/syslog.h>
  101 #include <sys/libkern.h>
  102 #include <sys/queue.h>
  103 
  104 #include <net/if.h>
  105 #include <net/if_dl.h>
  106 #include <net/if_types.h>
  107 #include <net/if_media.h>
  108 #include <net/bpf.h>
  109 #include <net/ethernet.h>
  110 
  111 #include "opt_inet.h"
  112 #include "opt_inet6.h"
  113 
  114 #include <netinet/in.h>
  115 #ifdef INET
  116 #include <netinet/in_systm.h>
  117 #include <netinet/ip.h>
  118 #endif
  119 
  120 #ifdef INET6
  121 #include <netinet/ip6.h>
  122 #endif
  123 
  124 #include <netgraph/ng_message.h>
  125 #include <netgraph/netgraph.h>
  126 #include <netgraph/ng_parse.h>
  127 #include <netgraph/ng_fec.h>
  128 
  129 /*
  130  * We need a way to stash a pointer to our netgraph node in the
  131  * ifnet structure so that receive handling works. As far as I can
  132  * tell, although there is an AF_NETGRAPH address family, it's only
  133  * used to identify sockaddr_ng structures: there is no netgraph address
  134  * family domain. This means the AF_NETGRAPH entry in ifp->if_afdata
  135  * should be unused, so we can use to hold our node context.
  136  */
  137 #define IFP2NG(ifp)     ((ifp)->if_afdata[AF_NETGRAPH])
  138 
  139 /*
  140  * Current fast etherchannel implementations use either 2 or 4
  141  * ports, so for now we limit the maximum bundle size to 4 interfaces.
  142  */
  143 #define FEC_BUNDLESIZ   4
  144 
  145 struct ng_fec_portlist {
  146         struct ifnet            *fec_if;
  147         void                    (*fec_if_input) (struct ifnet *,
  148                                                  struct mbuf *);
  149         int                     fec_idx;
  150         int                     fec_ifstat;
  151         struct ether_addr       fec_mac;
  152         SLIST_HEAD(__mclhd, ng_fec_mc)  fec_mc_head;
  153         TAILQ_ENTRY(ng_fec_portlist) fec_list;
  154 };
  155 
  156 struct ng_fec_mc {
  157         struct ifmultiaddr      *mc_ifma;
  158         SLIST_ENTRY(ng_fec_mc)    mc_entries;
  159 };
  160 
  161 struct ng_fec_bundle {
  162         TAILQ_HEAD(,ng_fec_portlist) ng_fec_ports;
  163         int                     fec_ifcnt;
  164         int                     fec_btype;
  165         int                     (*fec_if_output) (struct ifnet *,
  166                                                   struct mbuf *,
  167                                                   struct sockaddr *,
  168                                                   struct rtentry *);
  169 };
  170 
  171 #define FEC_BTYPE_MAC           0x01
  172 #define FEC_BTYPE_INET          0x02
  173 #define FEC_BTYPE_INET6         0x03
  174 
  175 /* Node private data */
  176 struct ng_fec_private {
  177         struct ifnet *ifp;
  178         struct ifmedia ifmedia;
  179         int     if_flags;
  180         int     if_error;               /* XXX */
  181         int     unit;                   /* Interface unit number */
  182         node_p  node;                   /* Our netgraph node */
  183         struct ng_fec_bundle fec_bundle;/* Aggregate bundle */
  184         struct callout_handle fec_ch;   /* callout handle for ticker */
  185 };
  186 typedef struct ng_fec_private *priv_p;
  187 
  188 /* Interface methods */
  189 static void     ng_fec_input(struct ifnet *, struct mbuf *);
  190 static void     ng_fec_start(struct ifnet *ifp);
  191 static int      ng_fec_choose_port(struct ng_fec_bundle *b,
  192                         struct mbuf *m, struct ifnet **ifp);
  193 static int      ng_fec_setport(struct ifnet *ifp, u_long cmd, caddr_t data);
  194 static void     ng_fec_init(void *arg);
  195 static void     ng_fec_stop(struct ifnet *ifp);
  196 static int      ng_fec_ifmedia_upd(struct ifnet *ifp);
  197 static void     ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr);
  198 static int      ng_fec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
  199 static int      ng_fec_output(struct ifnet *ifp, struct mbuf *m0,
  200                         struct sockaddr *dst, struct rtentry *rt0);
  201 static void     ng_fec_tick(void *arg);
  202 static int      ng_fec_addport(struct ng_fec_private *priv, char *iface);
  203 static int      ng_fec_delport(struct ng_fec_private *priv, char *iface);
  204 static int      ng_fec_ether_cmdmulti(struct ifnet *trifp, struct ng_fec_portlist *p, int set);
  205 
  206 #ifdef DEBUG
  207 static void     ng_fec_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
  208 #endif
  209 
  210 /* Netgraph methods */
  211 static int              ng_fec_mod_event(module_t, int, void *);
  212 static ng_constructor_t ng_fec_constructor;
  213 static ng_rcvmsg_t      ng_fec_rcvmsg;
  214 static ng_shutdown_t    ng_fec_shutdown;
  215 
  216 /* List of commands and how to convert arguments to/from ASCII */
  217 static const struct ng_cmdlist ng_fec_cmds[] = {
  218         {
  219           NGM_FEC_COOKIE,
  220           NGM_FEC_ADD_IFACE,
  221           "add_iface",
  222           &ng_parse_string_type,
  223           NULL,
  224         },
  225         {
  226           NGM_FEC_COOKIE,
  227           NGM_FEC_DEL_IFACE,
  228           "del_iface",
  229           &ng_parse_string_type,
  230           NULL,
  231         },
  232         {
  233           NGM_FEC_COOKIE,
  234           NGM_FEC_SET_MODE_MAC,
  235           "set_mode_mac",
  236           NULL,
  237           NULL,
  238         },
  239         {
  240           NGM_FEC_COOKIE,
  241           NGM_FEC_SET_MODE_INET,
  242           "set_mode_inet",
  243           NULL,
  244           NULL,
  245         },
  246         { 0 }
  247 };
  248 
  249 /* Node type descriptor */
  250 static struct ng_type typestruct = {
  251         .version =      NG_ABI_VERSION,
  252         .name =         NG_FEC_NODE_TYPE,
  253         .mod_event =    ng_fec_mod_event,
  254         .constructor =  ng_fec_constructor,
  255         .rcvmsg =       ng_fec_rcvmsg,
  256         .shutdown =     ng_fec_shutdown,
  257         .cmdlist =      ng_fec_cmds,
  258 };
  259 NETGRAPH_INIT(fec, &typestruct);
  260 
  261 /* We keep a bitmap indicating which unit numbers are free.
  262    One means the unit number is free, zero means it's taken. */
  263 static int      *ng_fec_units = NULL;
  264 static int      ng_fec_units_len = 0;
  265 static int      ng_units_in_use = 0;
  266 
  267 #define UNITS_BITSPERWORD       (sizeof(*ng_fec_units) * NBBY)
  268 
  269 static struct mtx       ng_fec_mtx;
  270 
  271 /*
  272  * Find the first free unit number for a new interface.
  273  * Increase the size of the unit bitmap as necessary.
  274  */
  275 static __inline int
  276 ng_fec_get_unit(int *unit)
  277 {
  278         int index, bit;
  279 
  280         mtx_lock(&ng_fec_mtx);
  281         for (index = 0; index < ng_fec_units_len
  282             && ng_fec_units[index] == 0; index++);
  283         if (index == ng_fec_units_len) {                /* extend array */
  284                 int i, *newarray, newlen;
  285 
  286                 newlen = (2 * ng_fec_units_len) + 4;
  287                 MALLOC(newarray, int *, newlen * sizeof(*ng_fec_units),
  288                     M_NETGRAPH, M_NOWAIT);
  289                 if (newarray == NULL) {
  290                         mtx_unlock(&ng_fec_mtx);
  291                         return (ENOMEM);
  292                 }
  293                 bcopy(ng_fec_units, newarray,
  294                     ng_fec_units_len * sizeof(*ng_fec_units));
  295                 for (i = ng_fec_units_len; i < newlen; i++)
  296                         newarray[i] = ~0;
  297                 if (ng_fec_units != NULL)
  298                         FREE(ng_fec_units, M_NETGRAPH);
  299                 ng_fec_units = newarray;
  300                 ng_fec_units_len = newlen;
  301         }
  302         bit = ffs(ng_fec_units[index]) - 1;
  303         KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1,
  304             ("%s: word=%d bit=%d", __func__, ng_fec_units[index], bit));
  305         ng_fec_units[index] &= ~(1 << bit);
  306         *unit = (index * UNITS_BITSPERWORD) + bit;
  307         ng_units_in_use++;
  308         mtx_unlock(&ng_fec_mtx);
  309         return (0);
  310 }
  311 
  312 /*
  313  * Free a no longer needed unit number.
  314  */
  315 static __inline void
  316 ng_fec_free_unit(int unit)
  317 {
  318         int index, bit;
  319 
  320         index = unit / UNITS_BITSPERWORD;
  321         bit = unit % UNITS_BITSPERWORD;
  322         mtx_lock(&ng_fec_mtx);
  323         KASSERT(index < ng_fec_units_len,
  324             ("%s: unit=%d len=%d", __func__, unit, ng_fec_units_len));
  325         KASSERT((ng_fec_units[index] & (1 << bit)) == 0,
  326             ("%s: unit=%d is free", __func__, unit));
  327         ng_fec_units[index] |= (1 << bit);
  328         /*
  329          * XXX We could think about reducing the size of ng_fec_units[]
  330          * XXX here if the last portion is all ones
  331          * XXX At least free it if no more units
  332          * Needed if we are to eventually be able to unload.
  333          */
  334         ng_units_in_use--;
  335         if (ng_units_in_use == 0) { /* XXX make SMP safe */
  336                 FREE(ng_fec_units, M_NETGRAPH);
  337                 ng_fec_units_len = 0;
  338                 ng_fec_units = NULL;
  339         }
  340         mtx_unlock(&ng_fec_mtx);
  341 }
  342 
  343 /************************************************************************
  344                         INTERFACE STUFF
  345  ************************************************************************/
  346 
  347 static int
  348 ng_fec_addport(struct ng_fec_private *priv, char *iface)
  349 {
  350         struct ng_fec_bundle    *b;
  351         struct ifnet            *ifp, *bifp;
  352         struct ng_fec_portlist  *p, *new;
  353 
  354         if (priv == NULL || iface == NULL)
  355                 return(EINVAL);
  356 
  357         b = &priv->fec_bundle;
  358         ifp = priv->ifp;
  359 
  360         /* Only allow reconfiguration if not running. */
  361         if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
  362                 printf("fec%d: can't add new iface; bundle is running\n",
  363                     priv->unit);
  364                 return (EINVAL);
  365         }
  366 
  367         /* Find the interface */
  368         bifp = ifunit(iface);
  369         if (bifp == NULL) {
  370                 printf("fec%d: tried to add iface %s, which "
  371                     "doesn't seem to exist\n", priv->unit, iface);
  372                 return(ENOENT);
  373         }
  374 
  375         /* See if we have room in the bundle */
  376         if (b->fec_ifcnt == FEC_BUNDLESIZ) {
  377                 printf("fec%d: can't add new iface; bundle is full\n",
  378                     priv->unit);
  379                 return(ENOSPC);
  380         }
  381 
  382         /* See if the interface is already in the bundle */
  383         TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
  384                 if (p->fec_if == bifp) {
  385                         printf("fec%d: iface %s is already in this "
  386                             "bundle\n", priv->unit, iface);
  387                         return(EINVAL);
  388                 }
  389         }
  390 
  391         /*
  392          * All interfaces must use the same output vector. Once the
  393          * user attaches an interface of one type, make all subsequent
  394          * interfaces have the same output vector.
  395          */
  396         if (b->fec_if_output != NULL) {
  397                 if (b->fec_if_output != bifp->if_output) {
  398                         printf("fec%d: iface %s is not the same type "
  399                             "as the other interface(s) already in "
  400                             "the bundle\n", priv->unit, iface);
  401                         return(EINVAL);
  402                 }
  403         }
  404 
  405         /* Allocate new list entry. */
  406         MALLOC(new, struct ng_fec_portlist *,
  407             sizeof(struct ng_fec_portlist), M_NETGRAPH, M_NOWAIT);
  408         if (new == NULL)
  409                 return(ENOMEM);
  410 
  411         IF_AFDATA_LOCK(bifp);
  412         IFP2NG(bifp) = priv->node;
  413         IF_AFDATA_UNLOCK(bifp);
  414 
  415         /*
  416          * If this is the first interface added to the bundle,
  417          * use its MAC address for the virtual interface (and,
  418          * by extension, all the other ports in the bundle).
  419          */
  420         if (b->fec_ifcnt == 0)
  421                 if_setlladdr(ifp, IF_LLADDR(bifp), ETHER_ADDR_LEN);
  422 
  423         b->fec_btype = FEC_BTYPE_MAC;
  424         new->fec_idx = b->fec_ifcnt;
  425         b->fec_ifcnt++;
  426 
  427         /* Initialise the list of multicast addresses that we own. */
  428         SLIST_INIT(&new->fec_mc_head);
  429 
  430         /* Save the real MAC address. */
  431         bcopy(IF_LLADDR(bifp),
  432             (char *)&new->fec_mac, ETHER_ADDR_LEN);
  433 
  434         /* Set up phony MAC address. */
  435         if_setlladdr(bifp, IF_LLADDR(ifp), ETHER_ADDR_LEN);
  436 
  437         /* Save original input vector */
  438         new->fec_if_input = bifp->if_input;
  439 
  440         /* Override it with our own */
  441         bifp->if_input = ng_fec_input;
  442 
  443         /* Save output vector too. */
  444         if (b->fec_if_output == NULL)
  445                 b->fec_if_output = bifp->if_output;
  446 
  447         /* Add to the queue */
  448         new->fec_if = bifp;
  449         new->fec_ifstat = -1;
  450         TAILQ_INSERT_TAIL(&b->ng_fec_ports, new, fec_list);
  451 
  452         /* Add multicast addresses to this port. */
  453         ng_fec_ether_cmdmulti(ifp, new, 1);
  454 
  455         return(0);
  456 }
  457 
  458 static int
  459 ng_fec_delport(struct ng_fec_private *priv, char *iface)
  460 {
  461         struct ng_fec_bundle    *b;
  462         struct ifnet            *ifp, *bifp;
  463         struct ng_fec_portlist  *p;
  464 
  465         if (priv == NULL || iface == NULL)
  466                 return(EINVAL);
  467 
  468         b = &priv->fec_bundle;
  469         ifp = priv->ifp;
  470 
  471         /* Only allow reconfiguration if not running. */
  472         if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
  473                 printf("fec%d: can't remove iface; bundle is running\n",
  474                     priv->unit);
  475                 return (EINVAL);
  476         }
  477 
  478         /* Find the interface */
  479         bifp = ifunit(iface);
  480         if (bifp == NULL) {
  481                 printf("fec%d: tried to remove iface %s, which "
  482                     "doesn't seem to exist\n", priv->unit, iface);
  483                 return(ENOENT);
  484         }
  485 
  486         TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
  487                 if (p->fec_if == bifp)
  488                         break;
  489         }
  490 
  491         if (p == NULL) {
  492                 printf("fec%d: tried to remove iface %s which "
  493                     "is not in our bundle\n", priv->unit, iface);
  494                 return(EINVAL);
  495         }
  496 
  497         /* Stop interface */
  498         bifp->if_flags &= ~IFF_UP;
  499         (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL);
  500 
  501         /* Restore MAC address. */
  502         if_setlladdr(bifp, (u_char *)&p->fec_mac, ETHER_ADDR_LEN);
  503 
  504         /* Restore input vector */
  505         bifp->if_input = p->fec_if_input;
  506 
  507         /* Remove our node context pointer. */
  508         IF_AFDATA_LOCK(bifp);
  509         IFP2NG(bifp) = NULL;
  510         IF_AFDATA_UNLOCK(bifp);
  511 
  512         /* Delete port */
  513         TAILQ_REMOVE(&b->ng_fec_ports, p, fec_list);
  514         FREE(p, M_NETGRAPH);
  515         b->fec_ifcnt--;
  516 
  517         if (b->fec_ifcnt == 0)
  518                 b->fec_if_output = NULL;
  519 
  520         return(0);
  521 }
  522 
  523 static int
  524 ng_fec_ether_cmdmulti(struct ifnet *trifp, struct ng_fec_portlist *p, int set)
  525 {
  526         struct ifnet *ifp = p->fec_if;
  527         struct ng_fec_mc *mc;
  528         struct ifmultiaddr *ifma, *rifma = NULL;
  529         struct sockaddr_dl sdl;
  530         int error;
  531 
  532         bzero((char *)&sdl, sizeof(sdl));
  533         sdl.sdl_len = sizeof(sdl);
  534         sdl.sdl_family = AF_LINK;
  535         sdl.sdl_type = IFT_ETHER;
  536         sdl.sdl_alen = ETHER_ADDR_LEN;
  537         sdl.sdl_index = ifp->if_index;
  538 
  539         if (set) {
  540                 TAILQ_FOREACH(ifma, &trifp->if_multiaddrs, ifma_link) {
  541                         if (ifma->ifma_addr->sa_family != AF_LINK)
  542                                 continue;
  543                         bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
  544                             LLADDR(&sdl), ETHER_ADDR_LEN);
  545 
  546                         error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
  547                         if (error)
  548                                 return (error);
  549                         mc = malloc(sizeof(struct ng_fec_mc), M_DEVBUF, M_NOWAIT);
  550                         if (mc == NULL)
  551                                 return (ENOMEM);
  552                         mc->mc_ifma = rifma;
  553                         SLIST_INSERT_HEAD(&p->fec_mc_head, mc, mc_entries);
  554                 }
  555         } else {
  556                 while ((mc = SLIST_FIRST(&p->fec_mc_head)) != NULL) {
  557                         SLIST_REMOVE(&p->fec_mc_head, mc, ng_fec_mc, mc_entries);
  558                         if_delmulti_ifma(mc->mc_ifma);
  559                         free(mc, M_DEVBUF);
  560                 }
  561         }
  562         return (0);
  563 }
  564 
  565 static int
  566 ng_fec_ether_setmulti(struct ifnet *ifp)
  567 {
  568         struct ng_fec_private   *priv;
  569         struct ng_fec_bundle    *b;
  570         struct ng_fec_portlist  *p;
  571 
  572         priv = ifp->if_softc;
  573         b = &priv->fec_bundle;
  574 
  575         TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
  576                 /* First, remove any existing filter entries. */
  577                 ng_fec_ether_cmdmulti(ifp, p, 0);
  578                 /* copy all addresses from the fec interface to the port */
  579                 ng_fec_ether_cmdmulti(ifp, p, 1);
  580         }
  581         return (0);
  582 }
  583 
  584 /*
  585  * Pass an ioctl command down to all the underyling interfaces in a
  586  * bundle. Used for setting flags.
  587  */
  588 
  589 static int 
  590 ng_fec_setport(struct ifnet *ifp, u_long command, caddr_t data)
  591 {
  592         struct ng_fec_private   *priv;
  593         struct ng_fec_bundle    *b;
  594         struct ifnet            *oifp;
  595         struct ng_fec_portlist  *p;
  596 
  597         priv = ifp->if_softc;
  598         b = &priv->fec_bundle;
  599 
  600         TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
  601                 oifp = p->fec_if;
  602                 if (oifp != NULL)
  603                         (*oifp->if_ioctl)(oifp, command, data);
  604         }
  605 
  606         return(0);
  607 }
  608 
  609 static void
  610 ng_fec_init(void *arg)
  611 {
  612         struct ng_fec_private   *priv;
  613         struct ng_fec_bundle    *b;
  614         struct ifnet            *ifp, *bifp;
  615         struct ng_fec_portlist  *p;
  616 
  617         priv = arg;
  618         ifp = priv->ifp;
  619         b = &priv->fec_bundle;
  620 
  621         if (b->fec_ifcnt != 2 && b->fec_ifcnt != FEC_BUNDLESIZ) {
  622                 printf("fec%d: invalid bundle "
  623                     "size: %d\n", priv->unit,
  624                     b->fec_ifcnt);
  625                 return;
  626         }
  627 
  628         ng_fec_stop(ifp);
  629 
  630         TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
  631                 bifp = p->fec_if;
  632                 bifp->if_flags |= IFF_UP;
  633                 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL);
  634                 /* mark iface as up and let the monitor check it */
  635                 p->fec_ifstat = -1;
  636         }
  637 
  638         ifp->if_drv_flags &= ~(IFF_DRV_OACTIVE);
  639         ifp->if_drv_flags |= IFF_DRV_RUNNING;
  640 
  641         priv->fec_ch = timeout(ng_fec_tick, priv, hz);
  642 
  643         return;
  644 }
  645 
  646 static void
  647 ng_fec_stop(struct ifnet *ifp)
  648 {
  649         struct ng_fec_private   *priv;
  650         struct ng_fec_bundle    *b;
  651         struct ifnet            *bifp;
  652         struct ng_fec_portlist  *p;
  653 
  654         priv = ifp->if_softc;
  655         b = &priv->fec_bundle;
  656 
  657         TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
  658                 bifp = p->fec_if;
  659                 bifp->if_flags &= ~IFF_UP;
  660                 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL);
  661         }
  662 
  663         untimeout(ng_fec_tick, priv, priv->fec_ch);
  664 
  665         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
  666 
  667         return;
  668 }
  669 
  670 static void
  671 ng_fec_tick(void *arg)
  672 {
  673         struct ng_fec_private   *priv;
  674         struct ng_fec_bundle    *b;
  675         struct ifmediareq       ifmr;
  676         struct ifnet            *ifp;
  677         struct ng_fec_portlist  *p;
  678         int                     error = 0;
  679 
  680         priv = arg;
  681         b = &priv->fec_bundle;
  682 
  683         TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
  684                 bzero((char *)&ifmr, sizeof(ifmr));
  685                 ifp = p->fec_if;
  686                 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
  687                 if (error) {
  688                         printf("fec%d: failed to check status "
  689                             "of link %s\n", priv->unit, ifp->if_xname);
  690                         continue;
  691                 }
  692 
  693                 if (ifmr.ifm_status & IFM_AVALID) {
  694                         if (ifmr.ifm_status & IFM_ACTIVE) {
  695                                 if (p->fec_ifstat == -1 ||
  696                                     p->fec_ifstat == 0) {
  697                                         p->fec_ifstat = 1;
  698                                         printf("fec%d: port %s in bundle "
  699                                             "is up\n", priv->unit,
  700                                             ifp->if_xname);
  701                                 }
  702                         } else {
  703                                 if (p->fec_ifstat == -1 ||
  704                                     p->fec_ifstat == 1) {
  705                                         p->fec_ifstat = 0;
  706                                         printf("fec%d: port %s in bundle "
  707                                             "is down\n", priv->unit,
  708                                             ifp->if_xname);
  709                                 }
  710                         }
  711                 }
  712         }
  713 
  714         ifp = priv->ifp;
  715         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
  716                 priv->fec_ch = timeout(ng_fec_tick, priv, hz);
  717 
  718         return;
  719 }
  720 
  721 static int
  722 ng_fec_ifmedia_upd(struct ifnet *ifp)
  723 {
  724         return(0);
  725 }
  726 
  727 static void ng_fec_ifmedia_sts(struct ifnet *ifp,
  728         struct ifmediareq *ifmr)
  729 {
  730         struct ng_fec_private   *priv;
  731         struct ng_fec_bundle    *b;
  732         struct ng_fec_portlist  *p;
  733 
  734         priv = ifp->if_softc;
  735         b = &priv->fec_bundle;
  736 
  737         ifmr->ifm_status = IFM_AVALID;
  738         TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
  739                 if (p->fec_ifstat == 1) {
  740                         ifmr->ifm_status |= IFM_ACTIVE;
  741                         break;
  742                 }
  743         }
  744 
  745         return;
  746 }
  747 
  748 /*
  749  * Process an ioctl for the virtual interface
  750  */
  751 static int
  752 ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
  753 {
  754         struct ifreq *const ifr = (struct ifreq *) data;
  755         int s, error = 0;
  756         struct ng_fec_private   *priv;
  757         struct ng_fec_bundle    *b;
  758 
  759         priv = ifp->if_softc;
  760         b = &priv->fec_bundle;
  761 
  762 #ifdef DEBUG
  763         ng_fec_print_ioctl(ifp, command, data);
  764 #endif
  765         s = splimp();
  766         switch (command) {
  767 
  768         /* These two are mostly handled at a higher layer */
  769         case SIOCSIFADDR:
  770         case SIOCGIFADDR:
  771                 error = ether_ioctl(ifp, command, data);
  772                 break;
  773 
  774         case SIOCSIFMTU:
  775                 if (ifr->ifr_mtu >= NG_FEC_MTU_MIN &&
  776                     ifr->ifr_mtu <= NG_FEC_MTU_MAX) {
  777                         struct ng_fec_portlist *p;
  778                         struct ifnet *bifp;
  779 
  780                         TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
  781                                 bifp = p->fec_if;
  782                                 error = (*bifp->if_ioctl)(bifp, SIOCSIFMTU,
  783                                     data);
  784                                 if (error != 0)
  785                                         break;
  786                         }
  787                         if (error == 0)
  788                                 ifp->if_mtu = ifr->ifr_mtu;
  789                 } else
  790                         error = EINVAL;
  791                 break;
  792 
  793         /* Set flags */
  794         case SIOCSIFFLAGS:
  795                 /*
  796                  * If the interface is marked up and stopped, then start it.
  797                  * If it is marked down and running, then stop it.
  798                  */
  799                 if (ifr->ifr_flags & IFF_UP) {
  800                         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
  801                                 /* Sanity. */
  802                                 if (b->fec_ifcnt != 2 &&
  803                                     b->fec_ifcnt != FEC_BUNDLESIZ) {
  804                                         printf("fec%d: invalid bundle "
  805                                             "size: %d\n", priv->unit,
  806                                             b->fec_ifcnt);
  807                                         error = EINVAL;
  808                                         break;
  809                                 }
  810                                 ng_fec_init(priv);
  811                         }
  812                         /*
  813                          * Bubble down changes in promisc mode to
  814                          * underlying interfaces.
  815                          */
  816                         if ((ifp->if_flags & IFF_PROMISC) !=
  817                             (priv->if_flags & IFF_PROMISC)) {
  818                                 ng_fec_setport(ifp, command, data);
  819                                 priv->if_flags = ifp->if_flags;
  820                         }
  821                 } else {
  822                         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
  823                                 ng_fec_stop(ifp);
  824                 }
  825                 break;
  826 
  827         case SIOCADDMULTI:
  828         case SIOCDELMULTI:
  829                 ng_fec_ether_setmulti(ifp);
  830                 error = 0;
  831                 break;
  832         case SIOCGIFMEDIA:
  833         case SIOCSIFMEDIA:
  834                 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command);
  835                 break;
  836         /* Stuff that's not supported */
  837         case SIOCSIFPHYS:
  838                 error = EOPNOTSUPP;
  839                 break;
  840 
  841         default:
  842                 error = EINVAL;
  843                 break;
  844         }
  845         (void) splx(s);
  846         return (error);
  847 }
  848 
  849 /*
  850  * This routine spies on mbufs received by underlying network device
  851  * drivers. When we add an interface to our bundle, we override its
  852  * if_input routine with a pointer to ng_fec_input(). This means we
  853  * get to look at all the device's packets before sending them to the
  854  * real ether_input() for processing by the stack. Once we verify the
  855  * packet comes from an interface that's been aggregated into
  856  * our bundle, we fix up the rcvif pointer and increment our
  857  * packet counters so that it looks like the frames are actually
  858  * coming from us.
  859  */
  860 static void 
  861 ng_fec_input(struct ifnet *ifp, struct mbuf *m0)
  862 {
  863         struct ng_node          *node;
  864         struct ng_fec_private   *priv;
  865         struct ng_fec_bundle    *b;
  866         struct ifnet            *bifp;
  867         struct ng_fec_portlist  *p;
  868 
  869         /* Sanity check */
  870         if (ifp == NULL || m0 == NULL)
  871                 return;
  872 
  873         node = IFP2NG(ifp);
  874 
  875         /* Sanity check part II */
  876         if (node == NULL)
  877                 return;
  878 
  879         priv = NG_NODE_PRIVATE(node);
  880         b = &priv->fec_bundle;
  881         bifp = priv->ifp;
  882 
  883         TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
  884                 if (p->fec_if == m0->m_pkthdr.rcvif)
  885                         break;
  886         }
  887 
  888         /* Wasn't meant for us; leave this frame alone. */
  889         if (p == NULL)
  890                 return;
  891 
  892         /*
  893          * Check for a BPF tap on the underlying interface. This
  894          * is mainly a debugging aid: it allows tcpdump-ing of an
  895          * individual interface in a bundle to work, which it
  896          * otherwise would not. BPF tapping of our own aggregate
  897          * interface will occur once we call ether_input().
  898          */
  899         BPF_MTAP(m0->m_pkthdr.rcvif, m0);
  900 
  901         /* Convince the system that this is our frame. */
  902         m0->m_pkthdr.rcvif = bifp;
  903 
  904         /*
  905          * Count bytes on an individual interface in a bundle.
  906          * The bytes will also be added to the aggregate interface
  907          * once we call ether_input().
  908          */
  909         ifp->if_ibytes += m0->m_pkthdr.len;
  910 
  911         bifp->if_ipackets++;
  912         (*bifp->if_input)(bifp, m0);
  913 
  914         return;
  915 }
  916 
  917 /*
  918  * Take a quick peek at the packet and see if it's ok for us to use
  919  * the inet or inet6 hash methods on it, if they're enabled. We do
  920  * this by setting flags in the mbuf header. Once we've made up our
  921  * mind what to do, we pass the frame to output vector for further
  922  * processing.
  923  */
  924 
  925 static int
  926 ng_fec_output(struct ifnet *ifp, struct mbuf *m,
  927                 struct sockaddr *dst, struct rtentry *rt0)
  928 {
  929         const priv_p priv = (priv_p) ifp->if_softc;
  930         struct ng_fec_bundle *b;
  931         int error;
  932 
  933         /* Check interface flags */
  934         if (!((ifp->if_flags & IFF_UP) &&
  935             (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
  936                 m_freem(m);
  937                 return (ENETDOWN);
  938         }
  939 
  940         b = &priv->fec_bundle;
  941 
  942         switch (b->fec_btype) {
  943         case FEC_BTYPE_MAC:
  944                 m->m_flags |= M_FEC_MAC;
  945                 break;
  946 #ifdef INET
  947         case FEC_BTYPE_INET:
  948                 /*
  949                  * We can't use the INET address port selection
  950                  * scheme if this isn't an INET packet.
  951                  */
  952                 if (dst->sa_family == AF_INET)
  953                         m->m_flags |= M_FEC_INET;
  954 #ifdef INET6
  955                 else if (dst->sa_family == AF_INET6)
  956                         m->m_flags |= M_FEC_INET6;
  957 #endif
  958                 else {
  959 #ifdef DEBUG
  960                         if_printf(ifp, "can't do inet aggregation of non "
  961                             "inet packet\n");
  962 #endif
  963                         m->m_flags |= M_FEC_MAC;
  964                 }
  965                 break;
  966 #endif
  967         default:
  968                 if_printf(ifp, "bogus hash type: %d\n",
  969                     b->fec_btype);
  970                 m_freem(m);
  971                 return(EINVAL);
  972                 break;
  973         }
  974 
  975         /*
  976          * Pass the frame to the output vector for all the protocol
  977          * handling. This will put the ethernet header on the packet
  978          * for us.
  979          */
  980         priv->if_error = 0;
  981         error = (*b->fec_if_output)(ifp, m, dst, rt0);
  982         if (priv->if_error && !error)
  983                 error = priv->if_error;
  984 
  985         return(error);
  986 }
  987 
  988 /*
  989  * Apply a hash to the source and destination addresses in the packet
  990  * in order to select an interface. Also check link status and handle
  991  * dead links accordingly.
  992  */
  993 
  994 static int
  995 ng_fec_choose_port(struct ng_fec_bundle *b,
  996         struct mbuf *m, struct ifnet **ifp)
  997 {
  998         struct ether_header     *eh;
  999         struct mbuf             *m0;
 1000 #ifdef INET
 1001         struct ip               *ip;
 1002 #ifdef INET6
 1003         struct ip6_hdr          *ip6;
 1004 #endif
 1005 #endif
 1006 
 1007         struct ng_fec_portlist  *p;
 1008         int                     port = 0, mask;
 1009 
 1010         /*
 1011          * If there are only two ports, mask off all but the
 1012          * last bit for XORing. If there are 4, mask off all
 1013          * but the last 2 bits.
 1014          */
 1015         mask = b->fec_ifcnt == 2 ? 0x1 : 0x3;
 1016         eh = mtod(m, struct ether_header *);
 1017 #ifdef INET
 1018         ip = (struct ip *)(mtod(m, char *) +
 1019             sizeof(struct ether_header));
 1020 #ifdef INET6
 1021         ip6 = (struct ip6_hdr *)(mtod(m, char *) +
 1022             sizeof(struct ether_header));
 1023 #endif
 1024 #endif
 1025 
 1026         /*
 1027          * The fg_fec_output() routine is supposed to leave a
 1028          * flag for us in the mbuf that tells us what hash to
 1029          * use, but sometimes a new mbuf is prepended to the
 1030          * chain, so we have to search every mbuf in the chain
 1031          * to find the flags.
 1032          */
 1033         m0 = m;
 1034         while (m0) {
 1035                 if (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6))
 1036                         break;
 1037                 m0 = m0->m_next;
 1038         }
 1039         if (m0 == NULL)
 1040                 return(EINVAL);
 1041 
 1042         switch (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) {
 1043         case M_FEC_MAC:
 1044                 port = (eh->ether_dhost[5] ^
 1045                     eh->ether_shost[5]) & mask;
 1046                 break;
 1047 #ifdef INET
 1048         case M_FEC_INET:
 1049                 port = (ntohl(ip->ip_dst.s_addr) ^
 1050                     ntohl(ip->ip_src.s_addr)) & mask;
 1051                 break;
 1052 #ifdef INET6
 1053         case M_FEC_INET6:
 1054                 port = (ip6->ip6_dst.s6_addr[15] ^
 1055                     ip6->ip6_dst.s6_addr[15]) & mask;
 1056                 break;
 1057 #endif
 1058 #endif
 1059         default:
 1060                 return(EINVAL);
 1061                         break;
 1062         }
 1063 
 1064         TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
 1065                 if (port == p->fec_idx)
 1066                         break;
 1067         }
 1068 
 1069         /*
 1070          * Now that we've chosen a port, make sure it's
 1071          * alive. If it's not alive, cycle through the bundle
 1072          * looking for a port that is alive. If we don't find
 1073          * any, return an error.
 1074          */
 1075         if (p->fec_ifstat != 1) {
 1076                 struct ng_fec_portlist  *n = NULL;
 1077 
 1078                 n = TAILQ_NEXT(p, fec_list);
 1079                 if (n == NULL)
 1080                         n = TAILQ_FIRST(&b->ng_fec_ports);
 1081                 while (n != p) {
 1082                         if (n->fec_ifstat == 1)
 1083                                 break;
 1084                         n = TAILQ_NEXT(n, fec_list);
 1085                         if (n == NULL)
 1086                                 n = TAILQ_FIRST(&b->ng_fec_ports);
 1087                 }
 1088                 if (n == p)
 1089                         return(EAGAIN);
 1090                 p = n;
 1091         }
 1092 
 1093         *ifp = p->fec_if;
 1094 
 1095         return(0);
 1096 }
 1097 
 1098 /*
 1099  * Now that the packet has been run through ether_output(), yank it
 1100  * off our own send queue and stick it on the queue for the appropriate
 1101  * underlying physical interface. Note that if the interface's send
 1102  * queue is full, we save an error status in our private netgraph
 1103  * space which will eventually be handed up to ng_fec_output(), which
 1104  * will return it to the rest of the IP stack. We need to do this
 1105  * in order to duplicate the effect of ether_output() returning ENOBUFS
 1106  * when it detects that an interface's send queue is full. There's no
 1107  * other way to signal the error status from here since the if_start()
 1108  * routine is spec'ed to return void.
 1109  *
 1110  * Once the frame is queued, we call ether_output_frame() to initiate
 1111  * transmission.
 1112  */
 1113 static void
 1114 ng_fec_start(struct ifnet *ifp)
 1115 {
 1116         struct ng_fec_private   *priv;
 1117         struct ng_fec_bundle    *b;
 1118         struct ifnet            *oifp = NULL;
 1119         struct mbuf             *m0;
 1120         int                     error;
 1121 
 1122         priv = ifp->if_softc;
 1123         b = &priv->fec_bundle;
 1124 
 1125         IF_DEQUEUE(&ifp->if_snd, m0);
 1126         if (m0 == NULL)
 1127                 return;
 1128 
 1129         BPF_MTAP(ifp, m0);
 1130 
 1131         /* Queue up packet on the proper port. */
 1132         error = ng_fec_choose_port(b, m0, &oifp);
 1133         if (error) {
 1134                 ifp->if_ierrors++;
 1135                 m_freem(m0);
 1136                 priv->if_error = ENOBUFS;
 1137                 return;
 1138         }
 1139         ifp->if_opackets++;
 1140 
 1141         priv->if_error = IF_HANDOFF(&oifp->if_snd, m0, oifp) ? 0 : ENOBUFS;
 1142 
 1143         return;
 1144 }
 1145 
 1146 #ifdef DEBUG
 1147 /*
 1148  * Display an ioctl to the virtual interface
 1149  */
 1150 
 1151 static void
 1152 ng_fec_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
 1153 {
 1154         char   *str;
 1155 
 1156         switch (command & IOC_DIRMASK) {
 1157         case IOC_VOID:
 1158                 str = "IO";
 1159                 break;
 1160         case IOC_OUT:
 1161                 str = "IOR";
 1162                 break;
 1163         case IOC_IN:
 1164                 str = "IOW";
 1165                 break;
 1166         case IOC_INOUT:
 1167                 str = "IORW";
 1168                 break;
 1169         default:
 1170                 str = "IO??";
 1171         }
 1172         log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n",
 1173                ifp->if_xname,
 1174                str,
 1175                IOCGROUP(command),
 1176                command & 0xff,
 1177                IOCPARM_LEN(command));
 1178 }
 1179 #endif /* DEBUG */
 1180 
 1181 /************************************************************************
 1182                         NETGRAPH NODE STUFF
 1183  ************************************************************************/
 1184 
 1185 /*
 1186  * Constructor for a node
 1187  */
 1188 static int
 1189 ng_fec_constructor(node_p node)
 1190 {
 1191         char ifname[NG_FEC_FEC_NAME_MAX + 1];
 1192         struct ifnet *ifp;
 1193         priv_p priv;
 1194         const uint8_t eaddr[ETHER_ADDR_LEN] = {0, 0, 0, 0, 0, 0};
 1195         struct ng_fec_bundle *b;
 1196         int error = 0;
 1197 
 1198         /* Allocate node and interface private structures */
 1199         MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO);
 1200         if (priv == NULL)
 1201                 return (ENOMEM);
 1202 
 1203         ifp = priv->ifp = if_alloc(IFT_ETHER);
 1204         if (ifp == NULL) {
 1205                 FREE(priv, M_NETGRAPH);
 1206                 return (ENOSPC);
 1207         }
 1208         b = &priv->fec_bundle;
 1209 
 1210         /* Link them together */
 1211         ifp->if_softc = priv;
 1212 
 1213         /* Get an interface unit number */
 1214         if ((error = ng_fec_get_unit(&priv->unit)) != 0) {
 1215                 if_free(ifp);
 1216                 FREE(priv, M_NETGRAPH);
 1217                 return (error);
 1218         }
 1219 
 1220         /* Link together node and private info */
 1221         NG_NODE_SET_PRIVATE(node, priv);
 1222         priv->node = node;
 1223 
 1224         /* Initialize interface structure */
 1225         if_initname(ifp, NG_FEC_FEC_NAME, priv->unit);
 1226         ifp->if_start = ng_fec_start;
 1227         ifp->if_ioctl = ng_fec_ioctl;
 1228         ifp->if_init = ng_fec_init;
 1229         ifp->if_watchdog = NULL;
 1230         ifp->if_snd.ifq_maxlen = ifqmaxlen;
 1231         ifp->if_mtu = NG_FEC_MTU_DEFAULT;
 1232         ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST);
 1233         ifp->if_addrlen = 0;                    /* XXX */
 1234         ifp->if_hdrlen = 0;                     /* XXX */
 1235         ifp->if_baudrate = 100000000;           /* XXX */
 1236         TAILQ_INIT(&ifp->if_addrhead); /* XXX useless - done in if_attach */
 1237 
 1238         /* Give this node the same name as the interface (if possible) */
 1239         bzero(ifname, sizeof(ifname));
 1240         strlcpy(ifname, ifp->if_xname, sizeof(ifname));
 1241         if (ng_name_node(node, ifname) != 0)
 1242                 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname);
 1243 
 1244         /* Attach the interface */
 1245         ether_ifattach(ifp, eaddr);
 1246         callout_handle_init(&priv->fec_ch);
 1247 
 1248         /* Override output method with our own */
 1249         ifp->if_output = ng_fec_output;
 1250 
 1251         TAILQ_INIT(&b->ng_fec_ports);
 1252         b->fec_ifcnt = 0;
 1253 
 1254         ifmedia_init(&priv->ifmedia, 0,
 1255             ng_fec_ifmedia_upd, ng_fec_ifmedia_sts);
 1256         ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL);
 1257         ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE);
 1258 
 1259         /* Done */
 1260         return (0);
 1261 }
 1262 
 1263 /*
 1264  * Receive a control message
 1265  */
 1266 static int
 1267 ng_fec_rcvmsg(node_p node, item_p item, hook_p lasthook)
 1268 {
 1269         const priv_p priv = NG_NODE_PRIVATE(node);
 1270         struct ng_fec_bundle    *b;
 1271         struct ng_mesg *resp = NULL;
 1272         struct ng_mesg *msg;
 1273         char *ifname;
 1274         int error = 0;
 1275 
 1276         NGI_GET_MSG(item, msg);
 1277         b = &priv->fec_bundle;
 1278 
 1279         switch (msg->header.typecookie) {
 1280         case NGM_FEC_COOKIE:
 1281                 switch (msg->header.cmd) {
 1282                 case NGM_FEC_ADD_IFACE:
 1283                         ifname = msg->data;
 1284                         error = ng_fec_addport(priv, ifname);
 1285                         break;
 1286                 case NGM_FEC_DEL_IFACE:
 1287                         ifname = msg->data;
 1288                         error = ng_fec_delport(priv, ifname);
 1289                         break;
 1290                 case NGM_FEC_SET_MODE_MAC:
 1291                         b->fec_btype = FEC_BTYPE_MAC;
 1292                         break;
 1293 #ifdef INET
 1294                 case NGM_FEC_SET_MODE_INET:
 1295                         b->fec_btype = FEC_BTYPE_INET;
 1296                         break;
 1297 #ifdef INET6
 1298                 case NGM_FEC_SET_MODE_INET6:
 1299                         b->fec_btype = FEC_BTYPE_INET6;
 1300                         break;
 1301 #endif
 1302 #endif
 1303                 default:
 1304                         error = EINVAL;
 1305                         break;
 1306                 }
 1307                 break;
 1308         default:
 1309                 error = EINVAL;
 1310                 break;
 1311         }
 1312         NG_RESPOND_MSG(error, node, item, resp);
 1313         NG_FREE_MSG(msg);
 1314         return (error);
 1315 }
 1316 
 1317 /*
 1318  * Shutdown and remove the node and its associated interface.
 1319  */
 1320 static int
 1321 ng_fec_shutdown(node_p node)
 1322 {
 1323         const priv_p priv = NG_NODE_PRIVATE(node);
 1324         struct ng_fec_bundle *b;
 1325         struct ng_fec_portlist  *p;
 1326 
 1327         b = &priv->fec_bundle;
 1328         ng_fec_stop(priv->ifp);
 1329 
 1330         while (!TAILQ_EMPTY(&b->ng_fec_ports)) {
 1331                 p = TAILQ_FIRST(&b->ng_fec_ports);
 1332                 ng_fec_ether_cmdmulti(priv->ifp, p, 0);
 1333                 ng_fec_delport(priv, p->fec_if->if_xname);
 1334         }
 1335 
 1336         ether_ifdetach(priv->ifp);
 1337         if_free_type(priv->ifp, IFT_ETHER);
 1338         ifmedia_removeall(&priv->ifmedia);
 1339         ng_fec_free_unit(priv->unit);
 1340         FREE(priv, M_NETGRAPH);
 1341         NG_NODE_SET_PRIVATE(node, NULL);
 1342         NG_NODE_UNREF(node);
 1343         return (0);
 1344 }
 1345 
 1346 /*
 1347  * Handle loading and unloading for this node type.
 1348  */
 1349 static int
 1350 ng_fec_mod_event(module_t mod, int event, void *data)
 1351 {
 1352         int error = 0;
 1353 
 1354         switch (event) {
 1355         case MOD_LOAD:
 1356                 mtx_init(&ng_fec_mtx, "ng_fec", NULL, MTX_DEF);
 1357                 break;
 1358         case MOD_UNLOAD:
 1359                 mtx_destroy(&ng_fec_mtx);
 1360                 break;
 1361         default:
 1362                 error = EOPNOTSUPP;
 1363                 break;
 1364         }
 1365         return (error);
 1366 }

Cache object: d8619d8d95f5ed05539be055b2aee574


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.