/*-
* Copyright (c) 2014-2018, Matthew Macy <mmacy@mattmacy.io>
* Copyright (C) 2017-2018 Joyent Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Neither the name of Matthew Macy nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_acpi.h"
#include "opt_sched.h"
#include <sys/param.h>
#include <sys/types.h>
#include <sys/bus.h>
#include <sys/eventhandler.h>
#include <sys/event.h>
#include <sys/sockio.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/kobj.h>
#include <sys/rman.h>
#include <sys/sbuf.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/taskqueue.h>
#include <sys/limits.h>
#include <sys/queue.h>
#include <sys/jail.h>
#include <sys/md5.h>
#include <sys/proc.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_types.h>
#include <net/if_media.h>
#include <net/if_clone.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/vnet.h>
#include <net/iflib.h>
#include <net/iflib_private.h>
#include "ifdi_if.h"
int
noop_attach(device_t dev)
{
return (0);
}
int
iflib_pseudo_detach(device_t dev)
{
if_ctx_t ctx;
uint32_t ifc_flags;
ctx = device_get_softc(dev);
ifc_flags = iflib_get_flags(ctx);
if ((ifc_flags & IFC_INIT_DONE) == 0)
return (0);
return (IFDI_DETACH(ctx));
}
static device_t iflib_pseudodev;
static struct mtx pseudoif_mtx;
MTX_SYSINIT(pseudoif_mtx, &pseudoif_mtx, "pseudoif_mtx", MTX_DEF);
#define PSEUDO_LOCK() mtx_lock(&pseudoif_mtx);
#define PSEUDO_UNLOCK() mtx_unlock(&pseudoif_mtx);
struct if_pseudo {
eventhandler_tag ip_detach_tag;
eventhandler_tag ip_lladdr_tag;
struct if_clone *ip_ifc;
if_shared_ctx_t ip_sctx;
devclass_t ip_dc;
LIST_ENTRY(if_pseudo) ip_list;
int ip_on_list;
};
static LIST_HEAD(, if_pseudo) iflib_pseudos = LIST_HEAD_INITIALIZER(iflib_pseudos);
/*
* XXX this assumes that the rest of the
* code won't hang on to it after it's
* removed / unloaded
*/
static if_pseudo_t
iflib_ip_lookup(const char *name)
{
if_pseudo_t ip = NULL;
PSEUDO_LOCK();
LIST_FOREACH(ip, &iflib_pseudos, ip_list) {
if (!strcmp(ip->ip_sctx->isc_name, name))
break;
}
PSEUDO_UNLOCK();
return (ip);
}
static void
iflib_ip_delete(if_pseudo_t ip)
{
PSEUDO_LOCK();
if (ip->ip_on_list) {
LIST_REMOVE(ip, ip_list);
ip->ip_on_list = 0;
}
PSEUDO_UNLOCK();
}
static void
iflib_ip_insert(if_pseudo_t ip)
{
PSEUDO_LOCK();
if (!ip->ip_on_list) {
LIST_INSERT_HEAD(&iflib_pseudos, ip, ip_list);
ip->ip_on_list = 1;
}
PSEUDO_UNLOCK();
}
static void
iflib_ifdetach(void *arg __unused, if_t ifp)
{
/* If the ifnet is just being renamed, don't do anything. */
if (ifp->if_flags & IFF_RENAMING)
return;
}
static void
iflib_iflladdr(void *arg __unused, if_t ifp __unused)
{
}
static int
iflib_clone_create(struct if_clone *ifc, int unit, caddr_t params)
{
const char *name = ifc_name(ifc);
struct iflib_cloneattach_ctx clctx;
if_ctx_t ctx;
if_pseudo_t ip;
device_t dev;
int rc;
clctx.cc_ifc = ifc;
clctx.cc_len = 0;
clctx.cc_params = params;
clctx.cc_name = name;
if (__predict_false(iflib_pseudodev == NULL)) {
/* SYSINIT initialization would panic !?! */
mtx_lock(&Giant);
iflib_pseudodev = device_add_child(root_bus, "ifpseudo", 0);
mtx_unlock(&Giant);
MPASS(iflib_pseudodev != NULL);
}
ip = iflib_ip_lookup(name);
if (ip == NULL) {
printf("no ip found for %s\n", name);
return (ENOENT);
}
if ((dev = devclass_get_device(ip->ip_dc, unit)) != NULL) {
printf("unit %d allocated\n", unit);
bus_generic_print_child(iflib_pseudodev, dev);
return (EBUSY);
}
PSEUDO_LOCK();
dev = device_add_child(iflib_pseudodev, name, unit);
device_set_driver(dev, &iflib_pseudodriver);
PSEUDO_UNLOCK();
device_quiet(dev);
rc = device_attach(dev);
MPASS(rc == 0);
MPASS(dev != NULL);
MPASS(devclass_get_device(ip->ip_dc, unit) == dev);
rc = iflib_pseudo_register(dev, ip->ip_sctx, &ctx, &clctx);
if (rc) {
mtx_lock(&Giant);
device_delete_child(iflib_pseudodev, dev);
mtx_unlock(&Giant);
} else
device_set_softc(dev, ctx);
return (rc);
}
static void
iflib_clone_destroy(if_t ifp)
{
if_ctx_t ctx;
device_t dev;
struct sx *ctx_lock;
int rc;
/*
* Detach device / free / free unit
*/
ctx = if_getsoftc(ifp);
dev = iflib_get_dev(ctx);
ctx_lock = iflib_ctx_lock_get(ctx);
sx_xlock(ctx_lock);
iflib_set_detach(ctx);
iflib_stop(ctx);
sx_xunlock(ctx_lock);
mtx_lock(&Giant);
rc = device_delete_child(iflib_pseudodev, dev);
mtx_unlock(&Giant);
if (rc == 0)
iflib_pseudo_deregister(ctx);
}
if_pseudo_t
iflib_clone_register(if_shared_ctx_t sctx)
{
if_pseudo_t ip;
if (sctx->isc_name == NULL) {
printf("iflib_clone_register failed - shared_ctx needs to have a device name\n");
return (NULL);
}
if (iflib_ip_lookup(sctx->isc_name) != NULL) {
printf("iflib_clone_register failed - shared_ctx %s alread registered\n",
sctx->isc_name);
return (NULL);
}
ip = malloc(sizeof(*ip), M_IFLIB, M_WAITOK|M_ZERO);
ip->ip_sctx = sctx;
ip->ip_dc = devclass_create(sctx->isc_name);
if (ip->ip_dc == NULL)
goto fail_clone;
/* XXX --- we can handle clone_advanced later */
ip->ip_ifc = if_clone_simple(sctx->isc_name, iflib_clone_create, iflib_clone_destroy, 0);
if (ip->ip_ifc == NULL) {
printf("clone_simple failed -- cloned %s devices will not be available\n", sctx->isc_name);
goto fail_clone;
}
ip->ip_lladdr_tag = EVENTHANDLER_REGISTER(iflladdr_event,
iflib_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
if (ip->ip_lladdr_tag == NULL)
goto fail_addr;
ip->ip_detach_tag = EVENTHANDLER_REGISTER(ifnet_departure_event,
iflib_ifdetach, NULL, EVENTHANDLER_PRI_ANY);
if (ip->ip_detach_tag == NULL)
goto fail_depart;
iflib_ip_insert(ip);
return (ip);
fail_depart:
EVENTHANDLER_DEREGISTER(iflladdr_event, ip->ip_lladdr_tag);
fail_addr:
if_clone_detach(ip->ip_ifc);
fail_clone:
free(ip, M_IFLIB);
return (NULL);
}
void
iflib_clone_deregister(if_pseudo_t ip)
{
/* XXX check that is not still in use */
iflib_ip_delete(ip);
EVENTHANDLER_DEREGISTER(ifnet_departure_event, ip->ip_detach_tag);
EVENTHANDLER_DEREGISTER(iflladdr_event, ip->ip_lladdr_tag);
if_clone_detach(ip->ip_ifc);
/* XXX free devclass */
free(ip, M_IFLIB);
}
