Hide the ifnet structure definition, no user serviceable parts inside, it's a netstack implementation detail. Include it temporarily in <net/if_var.h> until all drivers are updated to use the accessors exclusively. Reviewed by: glebius Sponsored by: Juniper Networks, Inc. Differential Revision: https://reviews.freebsd.org/D38046
304 lines
7.4 KiB
C
304 lines
7.4 KiB
C
/*-
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* Copyright (c) 2014-2018, Matthew Macy <mmacy@mattmacy.io>
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* Copyright (C) 2017-2018 Joyent Inc.
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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 are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Neither the name of Matthew Macy nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_acpi.h"
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#include "opt_sched.h"
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/bus.h>
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#include <sys/eventhandler.h>
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#include <sys/event.h>
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#include <sys/sockio.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/module.h>
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#include <sys/kobj.h>
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#include <sys/rman.h>
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#include <sys/sbuf.h>
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#include <sys/smp.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/taskqueue.h>
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#include <sys/limits.h>
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#include <sys/queue.h>
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#include <sys/jail.h>
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#include <sys/md5.h>
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#include <sys/proc.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_private.h>
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#include <net/if_types.h>
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#include <net/if_media.h>
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#include <net/if_clone.h>
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#include <net/bpf.h>
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#include <net/ethernet.h>
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#include <net/vnet.h>
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#include <net/iflib.h>
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#include <net/iflib_private.h>
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#include "ifdi_if.h"
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int
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noop_attach(device_t dev)
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{
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return (0);
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}
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int
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iflib_pseudo_detach(device_t dev)
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{
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if_ctx_t ctx;
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ctx = device_get_softc(dev);
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if ((iflib_get_flags(ctx) & (IFC_INIT_DONE | IFC_IN_DETACH)) ==
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IFC_INIT_DONE)
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return (EBUSY);
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return (0);
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}
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static device_t iflib_pseudodev;
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static struct mtx pseudoif_mtx;
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MTX_SYSINIT(pseudoif_mtx, &pseudoif_mtx, "pseudoif_mtx", MTX_DEF);
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#define PSEUDO_LOCK() mtx_lock(&pseudoif_mtx);
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#define PSEUDO_UNLOCK() mtx_unlock(&pseudoif_mtx);
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struct if_pseudo {
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eventhandler_tag ip_detach_tag;
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eventhandler_tag ip_lladdr_tag;
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struct if_clone *ip_ifc;
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if_shared_ctx_t ip_sctx;
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devclass_t ip_dc;
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LIST_ENTRY(if_pseudo) ip_list;
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int ip_on_list;
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};
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static LIST_HEAD(, if_pseudo) iflib_pseudos = LIST_HEAD_INITIALIZER(iflib_pseudos);
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/*
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* XXX this assumes that the rest of the
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* code won't hang on to it after it's
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* removed / unloaded
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*/
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static if_pseudo_t
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iflib_ip_lookup(const char *name)
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{
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if_pseudo_t ip = NULL;
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PSEUDO_LOCK();
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LIST_FOREACH(ip, &iflib_pseudos, ip_list) {
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if (!strcmp(ip->ip_sctx->isc_name, name))
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break;
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}
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PSEUDO_UNLOCK();
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return (ip);
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}
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static void
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iflib_ip_delete(if_pseudo_t ip)
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{
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PSEUDO_LOCK();
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if (ip->ip_on_list) {
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LIST_REMOVE(ip, ip_list);
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ip->ip_on_list = 0;
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}
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PSEUDO_UNLOCK();
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}
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static void
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iflib_ip_insert(if_pseudo_t ip)
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{
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PSEUDO_LOCK();
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if (!ip->ip_on_list) {
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LIST_INSERT_HEAD(&iflib_pseudos, ip, ip_list);
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ip->ip_on_list = 1;
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}
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PSEUDO_UNLOCK();
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}
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static void
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iflib_ifdetach(void *arg __unused, if_t ifp)
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{
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/* If the ifnet is just being renamed, don't do anything. */
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if (ifp->if_flags & IFF_RENAMING)
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return;
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}
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static void
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iflib_iflladdr(void *arg __unused, if_t ifp __unused)
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{
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}
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static int
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iflib_clone_create(struct if_clone *ifc, int unit, caddr_t params)
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{
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const char *name = ifc_name(ifc);
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struct iflib_cloneattach_ctx clctx;
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if_ctx_t ctx;
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if_pseudo_t ip;
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device_t dev;
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int rc;
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clctx.cc_ifc = ifc;
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clctx.cc_len = 0;
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clctx.cc_params = params;
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clctx.cc_name = name;
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if (__predict_false(iflib_pseudodev == NULL)) {
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/* SYSINIT initialization would panic !?! */
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bus_topo_lock();
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iflib_pseudodev = device_add_child(root_bus, "ifpseudo", 0);
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bus_topo_unlock();
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MPASS(iflib_pseudodev != NULL);
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}
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ip = iflib_ip_lookup(name);
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if (ip == NULL) {
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printf("no ip found for %s\n", name);
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return (ENOENT);
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}
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if ((dev = devclass_get_device(ip->ip_dc, unit)) != NULL) {
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printf("unit %d allocated\n", unit);
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bus_generic_print_child(iflib_pseudodev, dev);
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return (EBUSY);
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}
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PSEUDO_LOCK();
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dev = device_add_child(iflib_pseudodev, name, unit);
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device_set_driver(dev, &iflib_pseudodriver);
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PSEUDO_UNLOCK();
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device_quiet(dev);
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rc = device_attach(dev);
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MPASS(rc == 0);
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MPASS(dev != NULL);
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MPASS(devclass_get_device(ip->ip_dc, unit) == dev);
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rc = iflib_pseudo_register(dev, ip->ip_sctx, &ctx, &clctx);
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if (rc) {
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bus_topo_lock();
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device_delete_child(iflib_pseudodev, dev);
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bus_topo_unlock();
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} else
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device_set_softc(dev, ctx);
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return (rc);
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}
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static void
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iflib_clone_destroy(if_t ifp)
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{
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if_ctx_t ctx;
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device_t dev;
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struct sx *ctx_lock;
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int rc;
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/*
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* Detach device / free / free unit
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*/
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ctx = if_getsoftc(ifp);
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dev = iflib_get_dev(ctx);
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ctx_lock = iflib_ctx_lock_get(ctx);
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sx_xlock(ctx_lock);
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iflib_set_detach(ctx);
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iflib_stop(ctx);
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sx_xunlock(ctx_lock);
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bus_topo_lock();
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rc = device_delete_child(iflib_pseudodev, dev);
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bus_topo_unlock();
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if (rc == 0)
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iflib_pseudo_deregister(ctx);
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}
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if_pseudo_t
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iflib_clone_register(if_shared_ctx_t sctx)
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{
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if_pseudo_t ip;
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if (sctx->isc_name == NULL) {
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printf("iflib_clone_register failed - shared_ctx needs to have a device name\n");
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return (NULL);
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}
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if (iflib_ip_lookup(sctx->isc_name) != NULL) {
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printf("iflib_clone_register failed - shared_ctx %s alread registered\n",
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sctx->isc_name);
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return (NULL);
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}
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ip = malloc(sizeof(*ip), M_IFLIB, M_WAITOK|M_ZERO);
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ip->ip_sctx = sctx;
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ip->ip_dc = devclass_create(sctx->isc_name);
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if (ip->ip_dc == NULL)
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goto fail_clone;
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/* XXX --- we can handle clone_advanced later */
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ip->ip_ifc = if_clone_simple(sctx->isc_name, iflib_clone_create, iflib_clone_destroy, 0);
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if (ip->ip_ifc == NULL) {
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printf("clone_simple failed -- cloned %s devices will not be available\n", sctx->isc_name);
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goto fail_clone;
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}
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ip->ip_lladdr_tag = EVENTHANDLER_REGISTER(iflladdr_event,
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iflib_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
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if (ip->ip_lladdr_tag == NULL)
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goto fail_addr;
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ip->ip_detach_tag = EVENTHANDLER_REGISTER(ifnet_departure_event,
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iflib_ifdetach, NULL, EVENTHANDLER_PRI_ANY);
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if (ip->ip_detach_tag == NULL)
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goto fail_depart;
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iflib_ip_insert(ip);
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return (ip);
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fail_depart:
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EVENTHANDLER_DEREGISTER(iflladdr_event, ip->ip_lladdr_tag);
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fail_addr:
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if_clone_detach(ip->ip_ifc);
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fail_clone:
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free(ip, M_IFLIB);
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return (NULL);
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}
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void
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iflib_clone_deregister(if_pseudo_t ip)
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{
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/* XXX check that is not still in use */
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iflib_ip_delete(ip);
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EVENTHANDLER_DEREGISTER(ifnet_departure_event, ip->ip_detach_tag);
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EVENTHANDLER_DEREGISTER(iflladdr_event, ip->ip_lladdr_tag);
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if_clone_detach(ip->ip_ifc);
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/* XXX free devclass */
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free(ip, M_IFLIB);
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}
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