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|
/* $OpenBSD: if_vlan.c,v 1.214 2023/04/26 00:14:21 jan Exp $ */
/*
* Copyright 1998 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. M.I.T. makes
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. 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.
*
* $FreeBSD: src/sys/net/if_vlan.c,v 1.16 2000/03/26 15:21:40 charnier Exp $
*/
/*
* if_vlan.c - pseudo-device driver for IEEE 802.1Q virtual LANs.
* This is sort of sneaky in the implementation, since
* we need to pretend to be enough of an Ethernet implementation
* to make arp work. The way we do this is by telling everyone
* that we are an Ethernet, and then catch the packets that
* ether_output() left on our output queue when it calls
* if_start(), rewrite them for use by the real outgoing interface,
* and ask it to send them.
*
* Some devices support 802.1Q tag insertion in firmware. The
* vlan interface behavior changes when the IFCAP_VLAN_HWTAGGING
* capability is set on the parent. In this case, vlan_start()
* will not modify the ethernet header.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/systm.h>
#include <sys/rwlock.h>
#include <sys/percpu.h>
#include <sys/refcnt.h>
#include <sys/smr.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <net/if_vlan_var.h>
#include "bpfilter.h"
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
struct vlan_mc_entry {
LIST_ENTRY(vlan_mc_entry) mc_entries;
union {
struct ether_multi *mcu_enm;
} mc_u;
#define mc_enm mc_u.mcu_enm
struct sockaddr_storage mc_addr;
};
struct vlan_softc {
struct arpcom sc_ac;
#define sc_if sc_ac.ac_if
unsigned int sc_dead;
unsigned int sc_ifidx0; /* parent interface */
int sc_txprio;
int sc_rxprio;
uint16_t sc_proto; /* encapsulation ethertype */
uint16_t sc_tag;
uint16_t sc_type; /* non-standard ethertype or 0x8100 */
LIST_HEAD(__vlan_mchead, vlan_mc_entry)
sc_mc_listhead;
SMR_SLIST_ENTRY(vlan_softc) sc_list;
int sc_flags;
struct refcnt sc_refcnt;
struct task sc_ltask;
struct task sc_dtask;
};
SMR_SLIST_HEAD(vlan_list, vlan_softc);
#define IFVF_PROMISC 0x01 /* the parent should be made promisc */
#define IFVF_LLADDR 0x02 /* don't inherit the parents mac */
#define TAG_HASH_BITS 5
#define TAG_HASH_SIZE (1 << TAG_HASH_BITS)
#define TAG_HASH_MASK (TAG_HASH_SIZE - 1)
#define TAG_HASH(tag) (tag & TAG_HASH_MASK)
struct vlan_list *vlan_tagh, *svlan_tagh;
struct rwlock vlan_tagh_lk = RWLOCK_INITIALIZER("vlantag");
void vlanattach(int count);
int vlan_clone_create(struct if_clone *, int);
int vlan_clone_destroy(struct ifnet *);
int vlan_enqueue(struct ifnet *, struct mbuf *);
void vlan_start(struct ifqueue *ifq);
int vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr);
int vlan_up(struct vlan_softc *);
int vlan_down(struct vlan_softc *);
void vlan_ifdetach(void *);
void vlan_link_hook(void *);
void vlan_link_state(struct vlan_softc *, u_char, uint64_t);
int vlan_set_vnetid(struct vlan_softc *, uint16_t);
int vlan_set_parent(struct vlan_softc *, const char *);
int vlan_del_parent(struct vlan_softc *);
int vlan_inuse(uint16_t, unsigned int, uint16_t);
int vlan_inuse_locked(uint16_t, unsigned int, uint16_t);
int vlan_multi_add(struct vlan_softc *, struct ifreq *);
int vlan_multi_del(struct vlan_softc *, struct ifreq *);
void vlan_multi_apply(struct vlan_softc *, struct ifnet *, u_long);
void vlan_multi_free(struct vlan_softc *);
int vlan_media_get(struct vlan_softc *, struct ifreq *);
int vlan_iff(struct vlan_softc *);
int vlan_setlladdr(struct vlan_softc *, struct ifreq *);
int vlan_set_compat(struct ifnet *, struct ifreq *);
int vlan_get_compat(struct ifnet *, struct ifreq *);
struct if_clone vlan_cloner =
IF_CLONE_INITIALIZER("vlan", vlan_clone_create, vlan_clone_destroy);
struct if_clone svlan_cloner =
IF_CLONE_INITIALIZER("svlan", vlan_clone_create, vlan_clone_destroy);
void
vlanattach(int count)
{
unsigned int i;
/* Normal VLAN */
vlan_tagh = mallocarray(TAG_HASH_SIZE, sizeof(*vlan_tagh),
M_DEVBUF, M_NOWAIT);
if (vlan_tagh == NULL)
panic("vlanattach: hashinit");
/* Service-VLAN for QinQ/802.1ad provider bridges */
svlan_tagh = mallocarray(TAG_HASH_SIZE, sizeof(*svlan_tagh),
M_DEVBUF, M_NOWAIT);
if (svlan_tagh == NULL)
panic("vlanattach: hashinit");
for (i = 0; i < TAG_HASH_SIZE; i++) {
SMR_SLIST_INIT(&vlan_tagh[i]);
SMR_SLIST_INIT(&svlan_tagh[i]);
}
if_clone_attach(&vlan_cloner);
if_clone_attach(&svlan_cloner);
}
int
vlan_clone_create(struct if_clone *ifc, int unit)
{
struct vlan_softc *sc;
struct ifnet *ifp;
sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
sc->sc_dead = 0;
LIST_INIT(&sc->sc_mc_listhead);
task_set(&sc->sc_ltask, vlan_link_hook, sc);
task_set(&sc->sc_dtask, vlan_ifdetach, sc);
ifp = &sc->sc_if;
ifp->if_softc = sc;
snprintf(ifp->if_xname, sizeof ifp->if_xname, "%s%d", ifc->ifc_name,
unit);
/* NB: flags are not set here */
/* NB: mtu is not set here */
/* Special handling for the IEEE 802.1ad QinQ variant */
if (strcmp("svlan", ifc->ifc_name) == 0)
sc->sc_type = ETHERTYPE_QINQ;
else
sc->sc_type = ETHERTYPE_VLAN;
refcnt_init(&sc->sc_refcnt);
sc->sc_txprio = IF_HDRPRIO_PACKET;
sc->sc_rxprio = IF_HDRPRIO_OUTER;
ifp->if_flags = IFF_BROADCAST | IFF_MULTICAST;
ifp->if_xflags = IFXF_CLONED|IFXF_MPSAFE;
ifp->if_qstart = vlan_start;
ifp->if_enqueue = vlan_enqueue;
ifp->if_ioctl = vlan_ioctl;
ifp->if_hardmtu = 0xffff;
ifp->if_link_state = LINK_STATE_DOWN;
if_counters_alloc(ifp);
if_attach(ifp);
ether_ifattach(ifp);
ifp->if_hdrlen = EVL_ENCAPLEN;
return (0);
}
int
vlan_clone_destroy(struct ifnet *ifp)
{
struct vlan_softc *sc = ifp->if_softc;
NET_LOCK();
sc->sc_dead = 1;
if (ISSET(ifp->if_flags, IFF_RUNNING))
vlan_down(sc);
NET_UNLOCK();
ether_ifdetach(ifp);
if_detach(ifp);
smr_barrier();
refcnt_finalize(&sc->sc_refcnt, "vlanrefs");
vlan_multi_free(sc);
free(sc, M_DEVBUF, sizeof(*sc));
return (0);
}
void
vlan_transmit(struct vlan_softc *sc, struct ifnet *ifp0, struct mbuf *m)
{
struct ifnet *ifp = &sc->sc_if;
int txprio = sc->sc_txprio;
uint8_t prio;
#if NBPFILTER > 0
if (ifp->if_bpf)
bpf_mtap_ether(ifp->if_bpf, m, BPF_DIRECTION_OUT);
#endif /* NBPFILTER > 0 */
prio = (txprio == IF_HDRPRIO_PACKET) ?
m->m_pkthdr.pf.prio : txprio;
/* IEEE 802.1p has prio 0 and 1 swapped */
if (prio <= 1)
prio = !prio;
/*
* If the underlying interface cannot do VLAN tag insertion
* itself, create an encapsulation header.
*/
if ((ifp0->if_capabilities & IFCAP_VLAN_HWTAGGING) &&
(sc->sc_type == ETHERTYPE_VLAN)) {
m->m_pkthdr.ether_vtag = sc->sc_tag |
(prio << EVL_PRIO_BITS);
m->m_flags |= M_VLANTAG;
} else {
m = vlan_inject(m, sc->sc_type, sc->sc_tag |
(prio << EVL_PRIO_BITS));
if (m == NULL) {
counters_inc(ifp->if_counters, ifc_oerrors);
return;
}
}
if (if_enqueue(ifp0, m))
counters_inc(ifp->if_counters, ifc_oerrors);
}
int
vlan_enqueue(struct ifnet *ifp, struct mbuf *m)
{
struct ifnet *ifp0;
struct vlan_softc *sc;
int error = 0;
if (!ifq_is_priq(&ifp->if_snd))
return (if_enqueue_ifq(ifp, m));
sc = ifp->if_softc;
ifp0 = if_get(sc->sc_ifidx0);
if (ifp0 == NULL || !ISSET(ifp0->if_flags, IFF_RUNNING)) {
m_freem(m);
error = ENETDOWN;
} else {
counters_pkt(ifp->if_counters,
ifc_opackets, ifc_obytes, m->m_pkthdr.len);
vlan_transmit(sc, ifp0, m);
}
if_put(ifp0);
return (error);
}
void
vlan_start(struct ifqueue *ifq)
{
struct ifnet *ifp = ifq->ifq_if;
struct vlan_softc *sc = ifp->if_softc;
struct ifnet *ifp0;
struct mbuf *m;
ifp0 = if_get(sc->sc_ifidx0);
if (ifp0 == NULL || !ISSET(ifp0->if_flags, IFF_RUNNING)) {
ifq_purge(ifq);
goto leave;
}
while ((m = ifq_dequeue(ifq)) != NULL)
vlan_transmit(sc, ifp0, m);
leave:
if_put(ifp0);
}
struct mbuf *
vlan_strip(struct mbuf *m)
{
if (ISSET(m->m_flags, M_VLANTAG)) {
CLR(m->m_flags, M_VLANTAG);
} else {
struct ether_vlan_header *evl;
evl = mtod(m, struct ether_vlan_header *);
memmove((caddr_t)evl + EVL_ENCAPLEN, evl,
offsetof(struct ether_vlan_header, evl_encap_proto));
m_adj(m, EVL_ENCAPLEN);
}
return (m);
}
struct mbuf *
vlan_inject(struct mbuf *m, uint16_t type, uint16_t tag)
{
struct ether_vlan_header evh;
m_copydata(m, 0, ETHER_HDR_LEN, &evh);
evh.evl_proto = evh.evl_encap_proto;
evh.evl_encap_proto = htons(type);
evh.evl_tag = htons(tag);
m_adj(m, ETHER_HDR_LEN);
M_PREPEND(m, sizeof(evh) + ETHER_ALIGN, M_DONTWAIT);
if (m == NULL)
return (NULL);
m_adj(m, ETHER_ALIGN);
m_copyback(m, 0, sizeof(evh), &evh, M_NOWAIT);
CLR(m->m_flags, M_VLANTAG);
return (m);
}
struct mbuf *
vlan_input(struct ifnet *ifp0, struct mbuf *m, unsigned int *sdelim)
{
struct vlan_softc *sc;
struct ifnet *ifp;
struct ether_vlan_header *evl;
struct vlan_list *tagh, *list;
uint16_t vtag, tag;
uint16_t etype;
int rxprio;
if (m->m_flags & M_VLANTAG) {
vtag = m->m_pkthdr.ether_vtag;
etype = ETHERTYPE_VLAN;
tagh = vlan_tagh;
} else {
if (m->m_len < sizeof(*evl)) {
m = m_pullup(m, sizeof(*evl));
if (m == NULL)
return (NULL);
}
evl = mtod(m, struct ether_vlan_header *);
vtag = bemtoh16(&evl->evl_tag);
etype = bemtoh16(&evl->evl_encap_proto);
switch (etype) {
case ETHERTYPE_VLAN:
tagh = vlan_tagh;
break;
case ETHERTYPE_QINQ:
tagh = svlan_tagh;
break;
default:
panic("%s: unexpected etype 0x%04x", __func__, etype);
/* NOTREACHED */
}
}
tag = EVL_VLANOFTAG(vtag);
list = &tagh[TAG_HASH(tag)];
smr_read_enter();
SMR_SLIST_FOREACH(sc, list, sc_list) {
if (ifp0->if_index == sc->sc_ifidx0 && tag == sc->sc_tag &&
etype == sc->sc_type) {
refcnt_take(&sc->sc_refcnt);
break;
}
}
smr_read_leave();
if (sc == NULL) {
/* VLAN 0 Priority Tagging */
if (tag == 0 && etype == ETHERTYPE_VLAN) {
struct ether_header *eh;
/* XXX we should actually use the prio value? */
m = vlan_strip(m);
eh = mtod(m, struct ether_header *);
if (eh->ether_type == htons(ETHERTYPE_VLAN) ||
eh->ether_type == htons(ETHERTYPE_QINQ)) {
m_freem(m);
return (NULL);
}
} else
*sdelim = 1;
return (m); /* decline */
}
ifp = &sc->sc_if;
if (!ISSET(ifp->if_flags, IFF_RUNNING)) {
m_freem(m);
goto leave;
}
/*
* Having found a valid vlan interface corresponding to
* the given source interface and vlan tag, remove the
* encapsulation.
*/
m = vlan_strip(m);
rxprio = sc->sc_rxprio;
switch (rxprio) {
case IF_HDRPRIO_PACKET:
break;
case IF_HDRPRIO_OUTER:
m->m_pkthdr.pf.prio = EVL_PRIOFTAG(m->m_pkthdr.ether_vtag);
/* IEEE 802.1p has prio 0 and 1 swapped */
if (m->m_pkthdr.pf.prio <= 1)
m->m_pkthdr.pf.prio = !m->m_pkthdr.pf.prio;
break;
default:
m->m_pkthdr.pf.prio = rxprio;
break;
}
if_vinput(ifp, m);
leave:
refcnt_rele_wake(&sc->sc_refcnt);
return (NULL);
}
int
vlan_up(struct vlan_softc *sc)
{
struct vlan_list *tagh, *list;
struct ifnet *ifp = &sc->sc_if;
struct ifnet *ifp0;
int error = 0;
unsigned int hardmtu;
KASSERT(!ISSET(ifp->if_flags, IFF_RUNNING));
tagh = sc->sc_type == ETHERTYPE_QINQ ? svlan_tagh : vlan_tagh;
list = &tagh[TAG_HASH(sc->sc_tag)];
ifp0 = if_get(sc->sc_ifidx0);
if (ifp0 == NULL)
return (ENXIO);
/* check vlan will work on top of the parent */
if (ifp0->if_type != IFT_ETHER) {
error = EPROTONOSUPPORT;
goto put;
}
hardmtu = ifp0->if_hardmtu;
if (!ISSET(ifp0->if_capabilities, IFCAP_VLAN_MTU))
hardmtu -= EVL_ENCAPLEN;
if (ifp->if_mtu > hardmtu) {
error = ENOBUFS;
goto put;
}
/* parent is fine, let's prepare the sc to handle packets */
ifp->if_hardmtu = hardmtu;
SET(ifp->if_flags, ifp0->if_flags & IFF_SIMPLEX);
if (ISSET(sc->sc_flags, IFVF_PROMISC)) {
error = ifpromisc(ifp0, 1);
if (error != 0)
goto scrub;
}
/*
* Note: In cases like vio(4) and em(4) where the offsets of the
* csum can be freely defined, we could actually do csum offload
* for VLAN and QINQ packets.
*/
if (sc->sc_type != ETHERTYPE_VLAN) {
/*
* Hardware offload only works with the default VLAN
* ethernet type (0x8100).
*/
ifp->if_capabilities = 0;
} else if (ISSET(ifp0->if_capabilities, IFCAP_VLAN_HWTAGGING)) {
/*
* Chips that can do hardware-assisted VLAN encapsulation, can
* calculate the correct checksum for VLAN tagged packets.
*/
ifp->if_capabilities = ifp0->if_capabilities & IFCAP_CSUM_MASK;
}
/* commit the sc */
error = rw_enter(&vlan_tagh_lk, RW_WRITE | RW_INTR);
if (error != 0)
goto unpromisc;
error = vlan_inuse_locked(sc->sc_type, sc->sc_ifidx0, sc->sc_tag);
if (error != 0)
goto leave;
SMR_SLIST_INSERT_HEAD_LOCKED(list, sc, sc_list);
rw_exit(&vlan_tagh_lk);
/* Register callback for physical link state changes */
if_linkstatehook_add(ifp0, &sc->sc_ltask);
/* Register callback if parent wants to unregister */
if_detachhook_add(ifp0, &sc->sc_dtask);
/* configure the parent to handle packets for this vlan */
vlan_multi_apply(sc, ifp0, SIOCADDMULTI);
/* Inherit flags from parent interface. */
vlan_flags_from_parent(ifp0, IFXF_TSO);
/* we're running now */
SET(ifp->if_flags, IFF_RUNNING);
vlan_link_state(sc, ifp0->if_link_state, ifp0->if_baudrate);
if_put(ifp0);
return (ENETRESET);
leave:
rw_exit(&vlan_tagh_lk);
unpromisc:
if (ISSET(sc->sc_flags, IFVF_PROMISC))
(void)ifpromisc(ifp0, 0); /* XXX */
scrub:
ifp->if_capabilities = 0;
CLR(ifp->if_flags, IFF_SIMPLEX);
ifp->if_hardmtu = 0xffff;
put:
if_put(ifp0);
return (error);
}
int
vlan_down(struct vlan_softc *sc)
{
struct vlan_list *tagh, *list;
struct ifnet *ifp = &sc->sc_if;
struct ifnet *ifp0;
tagh = sc->sc_type == ETHERTYPE_QINQ ? svlan_tagh : vlan_tagh;
list = &tagh[TAG_HASH(sc->sc_tag)];
KASSERT(ISSET(ifp->if_flags, IFF_RUNNING));
vlan_link_state(sc, LINK_STATE_DOWN, 0);
CLR(ifp->if_flags, IFF_RUNNING);
ifq_barrier(&ifp->if_snd);
ifp0 = if_get(sc->sc_ifidx0);
if (ifp0 != NULL) {
if (ISSET(sc->sc_flags, IFVF_PROMISC))
ifpromisc(ifp0, 0);
vlan_multi_apply(sc, ifp0, SIOCDELMULTI);
if_detachhook_del(ifp0, &sc->sc_dtask);
if_linkstatehook_del(ifp0, &sc->sc_ltask);
}
if_put(ifp0);
rw_enter_write(&vlan_tagh_lk);
SMR_SLIST_REMOVE_LOCKED(list, sc, vlan_softc, sc_list);
rw_exit_write(&vlan_tagh_lk);
ifp->if_capabilities = 0;
CLR(ifp->if_flags, IFF_SIMPLEX);
ifp->if_hardmtu = 0xffff;
return (0);
}
void
vlan_ifdetach(void *v)
{
struct vlan_softc *sc = v;
struct ifnet *ifp = &sc->sc_if;
if (ISSET(ifp->if_flags, IFF_RUNNING)) {
vlan_down(sc);
CLR(ifp->if_flags, IFF_UP);
}
sc->sc_ifidx0 = 0;
}
void
vlan_link_hook(void *v)
{
struct vlan_softc *sc = v;
struct ifnet *ifp0;
u_char link = LINK_STATE_DOWN;
uint64_t baud = 0;
ifp0 = if_get(sc->sc_ifidx0);
if (ifp0 != NULL) {
link = ifp0->if_link_state;
baud = ifp0->if_baudrate;
}
if_put(ifp0);
vlan_link_state(sc, link, baud);
}
void
vlan_link_state(struct vlan_softc *sc, u_char link, uint64_t baud)
{
if (sc->sc_if.if_link_state == link)
return;
sc->sc_if.if_link_state = link;
sc->sc_if.if_baudrate = baud;
if_link_state_change(&sc->sc_if);
}
int
vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct vlan_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
struct if_parent *parent = (struct if_parent *)data;
struct ifnet *ifp0;
uint16_t tag;
int error = 0;
if (sc->sc_dead)
return (ENXIO);
switch (cmd) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
/* FALLTHROUGH */
case SIOCSIFFLAGS:
if (ISSET(ifp->if_flags, IFF_UP)) {
if (!ISSET(ifp->if_flags, IFF_RUNNING))
error = vlan_up(sc);
else
error = ENETRESET;
} else {
if (ISSET(ifp->if_flags, IFF_RUNNING))
error = vlan_down(sc);
}
break;
case SIOCSVNETID:
if (ifr->ifr_vnetid < EVL_VLID_MIN ||
ifr->ifr_vnetid > EVL_VLID_MAX) {
error = EINVAL;
break;
}
tag = ifr->ifr_vnetid;
if (tag == sc->sc_tag)
break;
error = vlan_set_vnetid(sc, tag);
break;
case SIOCGVNETID:
if (sc->sc_tag == EVL_VLID_NULL)
error = EADDRNOTAVAIL;
else
ifr->ifr_vnetid = (int64_t)sc->sc_tag;
break;
case SIOCDVNETID:
error = vlan_set_vnetid(sc, 0);
break;
case SIOCSIFPARENT:
error = vlan_set_parent(sc, parent->ifp_parent);
break;
case SIOCGIFPARENT:
ifp0 = if_get(sc->sc_ifidx0);
if (ifp0 == NULL)
error = EADDRNOTAVAIL;
else {
memcpy(parent->ifp_parent, ifp0->if_xname,
sizeof(parent->ifp_parent));
}
if_put(ifp0);
break;
case SIOCDIFPARENT:
error = vlan_del_parent(sc);
break;
case SIOCADDMULTI:
error = vlan_multi_add(sc, ifr);
break;
case SIOCDELMULTI:
error = vlan_multi_del(sc, ifr);
break;
case SIOCGIFMEDIA:
error = vlan_media_get(sc, ifr);
break;
case SIOCSIFMEDIA:
error = ENOTTY;
break;
case SIOCSIFLLADDR:
error = vlan_setlladdr(sc, ifr);
break;
case SIOCSETVLAN:
error = vlan_set_compat(ifp, ifr);
break;
case SIOCGETVLAN:
error = vlan_get_compat(ifp, ifr);
break;
case SIOCSTXHPRIO:
error = if_txhprio_l2_check(ifr->ifr_hdrprio);
if (error != 0)
break;
sc->sc_txprio = ifr->ifr_hdrprio;
break;
case SIOCGTXHPRIO:
ifr->ifr_hdrprio = sc->sc_txprio;
break;
case SIOCSRXHPRIO:
error = if_rxhprio_l2_check(ifr->ifr_hdrprio);
if (error != 0)
break;
sc->sc_rxprio = ifr->ifr_hdrprio;
break;
case SIOCGRXHPRIO:
ifr->ifr_hdrprio = sc->sc_rxprio;
break;
default:
error = ether_ioctl(ifp, &sc->sc_ac, cmd, data);
break;
}
if (error == ENETRESET)
error = vlan_iff(sc);
return error;
}
int
vlan_iff(struct vlan_softc *sc)
{
struct ifnet *ifp0;
int promisc = 0;
int error = 0;
if (ISSET(sc->sc_if.if_flags, IFF_PROMISC) ||
ISSET(sc->sc_flags, IFVF_LLADDR))
promisc = IFVF_PROMISC;
if (ISSET(sc->sc_flags, IFVF_PROMISC) == promisc)
return (0);
if (ISSET(sc->sc_if.if_flags, IFF_RUNNING)) {
ifp0 = if_get(sc->sc_ifidx0);
if (ifp0 != NULL)
error = ifpromisc(ifp0, promisc);
if_put(ifp0);
}
if (error == 0) {
CLR(sc->sc_flags, IFVF_PROMISC);
SET(sc->sc_flags, promisc);
}
return (error);
}
int
vlan_setlladdr(struct vlan_softc *sc, struct ifreq *ifr)
{
struct ifnet *ifp = &sc->sc_if;
struct ifnet *ifp0;
uint8_t lladdr[ETHER_ADDR_LEN];
int flag;
memcpy(lladdr, ifr->ifr_addr.sa_data, sizeof(lladdr));
/* setting the mac addr to 00:00:00:00:00:00 means reset lladdr */
if (memcmp(lladdr, etheranyaddr, sizeof(lladdr)) == 0) {
ifp0 = if_get(sc->sc_ifidx0);
if (ifp0 != NULL)
memcpy(lladdr, LLADDR(ifp0->if_sadl), sizeof(lladdr));
if_put(ifp0);
flag = 0;
} else
flag = IFVF_LLADDR;
if (memcmp(lladdr, LLADDR(ifp->if_sadl), sizeof(lladdr)) == 0 &&
ISSET(sc->sc_flags, IFVF_LLADDR) == flag) {
/* nop */
return (0);
}
/* commit */
if_setlladdr(ifp, lladdr);
CLR(sc->sc_flags, IFVF_LLADDR);
SET(sc->sc_flags, flag);
return (ENETRESET);
}
int
vlan_set_vnetid(struct vlan_softc *sc, uint16_t tag)
{
struct ifnet *ifp = &sc->sc_if;
struct vlan_list *tagh, *list;
u_char link = ifp->if_link_state;
uint64_t baud = ifp->if_baudrate;
int error;
tagh = sc->sc_type == ETHERTYPE_QINQ ? svlan_tagh : vlan_tagh;
if (ISSET(ifp->if_flags, IFF_RUNNING) && LINK_STATE_IS_UP(link))
vlan_link_state(sc, LINK_STATE_DOWN, 0);
error = rw_enter(&vlan_tagh_lk, RW_WRITE);
if (error != 0)
return (error);
error = vlan_inuse_locked(sc->sc_type, sc->sc_ifidx0, tag);
if (error != 0)
goto unlock;
if (ISSET(ifp->if_flags, IFF_RUNNING)) {
list = &tagh[TAG_HASH(sc->sc_tag)];
SMR_SLIST_REMOVE_LOCKED(list, sc, vlan_softc, sc_list);
sc->sc_tag = tag;
list = &tagh[TAG_HASH(sc->sc_tag)];
SMR_SLIST_INSERT_HEAD_LOCKED(list, sc, sc_list);
} else
sc->sc_tag = tag;
unlock:
rw_exit(&vlan_tagh_lk);
if (ISSET(ifp->if_flags, IFF_RUNNING) && LINK_STATE_IS_UP(link))
vlan_link_state(sc, link, baud);
return (error);
}
int
vlan_set_parent(struct vlan_softc *sc, const char *parent)
{
struct ifnet *ifp = &sc->sc_if;
struct ifnet *ifp0;
int error = 0;
ifp0 = if_unit(parent);
if (ifp0 == NULL)
return (EINVAL);
if (ifp0->if_type != IFT_ETHER) {
error = EPROTONOSUPPORT;
goto put;
}
if (sc->sc_ifidx0 == ifp0->if_index) {
/* nop */
goto put;
}
if (ISSET(ifp->if_flags, IFF_RUNNING)) {
error = EBUSY;
goto put;
}
error = vlan_inuse(sc->sc_type, ifp0->if_index, sc->sc_tag);
if (error != 0)
goto put;
/* commit */
sc->sc_ifidx0 = ifp0->if_index;
if (!ISSET(sc->sc_flags, IFVF_LLADDR))
if_setlladdr(ifp, LLADDR(ifp0->if_sadl));
put:
if_put(ifp0);
return (error);
}
int
vlan_del_parent(struct vlan_softc *sc)
{
struct ifnet *ifp = &sc->sc_if;
if (ISSET(ifp->if_flags, IFF_RUNNING))
return (EBUSY);
/* commit */
sc->sc_ifidx0 = 0;
if (!ISSET(sc->sc_flags, IFVF_LLADDR))
if_setlladdr(ifp, etheranyaddr);
return (0);
}
void
vlan_flags_from_parent(struct ifnet *ifp0, int flags)
{
struct vlan_softc *sc;
int i;
for (i = 0; i < TAG_HASH_SIZE; i++) {
SMR_SLIST_FOREACH_LOCKED(sc, &vlan_tagh[i], sc_list) {
/* vlan and tso only works with hw tagging */
if (!ISSET(ifp0->if_capabilities, IFCAP_VLAN_HWTAGGING))
CLR(flags, IFXF_TSO);
if (sc->sc_ifidx0 == ifp0->if_index) {
if (ISSET(ifp0->if_xflags, flags))
SET(sc->sc_if.if_xflags, flags);
else
CLR(sc->sc_if.if_xflags, flags);
}
}
}
}
int
vlan_set_compat(struct ifnet *ifp, struct ifreq *ifr)
{
struct vlanreq vlr;
struct ifreq req;
struct if_parent parent;
int error;
error = suser(curproc);
if (error != 0)
return (error);
error = copyin(ifr->ifr_data, &vlr, sizeof(vlr));
if (error != 0)
return (error);
if (vlr.vlr_parent[0] == '\0')
return (vlan_ioctl(ifp, SIOCDIFPARENT, (caddr_t)ifr));
memset(&req, 0, sizeof(req));
memcpy(req.ifr_name, ifp->if_xname, sizeof(req.ifr_name));
req.ifr_vnetid = vlr.vlr_tag;
error = vlan_ioctl(ifp, SIOCSVNETID, (caddr_t)&req);
if (error != 0)
return (error);
memset(&parent, 0, sizeof(parent));
memcpy(parent.ifp_name, ifp->if_xname, sizeof(parent.ifp_name));
memcpy(parent.ifp_parent, vlr.vlr_parent, sizeof(parent.ifp_parent));
error = vlan_ioctl(ifp, SIOCSIFPARENT, (caddr_t)&parent);
if (error != 0)
return (error);
memset(&req, 0, sizeof(req));
memcpy(req.ifr_name, ifp->if_xname, sizeof(req.ifr_name));
SET(ifp->if_flags, IFF_UP);
return (vlan_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&req));
}
int
vlan_get_compat(struct ifnet *ifp, struct ifreq *ifr)
{
struct vlan_softc *sc = ifp->if_softc;
struct vlanreq vlr;
struct ifnet *p;
memset(&vlr, 0, sizeof(vlr));
p = if_get(sc->sc_ifidx0);
if (p != NULL)
memcpy(vlr.vlr_parent, p->if_xname, sizeof(vlr.vlr_parent));
if_put(p);
vlr.vlr_tag = sc->sc_tag;
return (copyout(&vlr, ifr->ifr_data, sizeof(vlr)));
}
/*
* do a quick check of up and running vlans for existing configurations.
*
* NOTE: this does allow the same config on down vlans, but vlan_up()
* will catch them.
*/
int
vlan_inuse(uint16_t type, unsigned int ifidx, uint16_t tag)
{
int error = 0;
error = rw_enter(&vlan_tagh_lk, RW_READ | RW_INTR);
if (error != 0)
return (error);
error = vlan_inuse_locked(type, ifidx, tag);
rw_exit(&vlan_tagh_lk);
return (error);
}
int
vlan_inuse_locked(uint16_t type, unsigned int ifidx, uint16_t tag)
{
struct vlan_list *tagh, *list;
struct vlan_softc *sc;
tagh = type == ETHERTYPE_QINQ ? svlan_tagh : vlan_tagh;
list = &tagh[TAG_HASH(tag)];
SMR_SLIST_FOREACH_LOCKED(sc, list, sc_list) {
if (sc->sc_tag == tag &&
sc->sc_type == type && /* wat */
sc->sc_ifidx0 == ifidx)
return (EADDRINUSE);
}
return (0);
}
int
vlan_multi_add(struct vlan_softc *sc, struct ifreq *ifr)
{
struct ifnet *ifp0;
struct vlan_mc_entry *mc;
uint8_t addrlo[ETHER_ADDR_LEN], addrhi[ETHER_ADDR_LEN];
int error;
error = ether_addmulti(ifr, &sc->sc_ac);
if (error != ENETRESET)
return (error);
/*
* This is new multicast address. We have to tell parent
* about it. Also, remember this multicast address so that
* we can delete them on unconfigure.
*/
if ((mc = malloc(sizeof(*mc), M_DEVBUF, M_NOWAIT)) == NULL) {
error = ENOMEM;
goto alloc_failed;
}
/*
* As ether_addmulti() returns ENETRESET, following two
* statement shouldn't fail.
*/
(void)ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi);
ETHER_LOOKUP_MULTI(addrlo, addrhi, &sc->sc_ac, mc->mc_enm);
memcpy(&mc->mc_addr, &ifr->ifr_addr, ifr->ifr_addr.sa_len);
LIST_INSERT_HEAD(&sc->sc_mc_listhead, mc, mc_entries);
ifp0 = if_get(sc->sc_ifidx0);
error = (ifp0 == NULL) ? 0 :
(*ifp0->if_ioctl)(ifp0, SIOCADDMULTI, (caddr_t)ifr);
if_put(ifp0);
if (error != 0)
goto ioctl_failed;
return (error);
ioctl_failed:
LIST_REMOVE(mc, mc_entries);
free(mc, M_DEVBUF, sizeof(*mc));
alloc_failed:
(void)ether_delmulti(ifr, &sc->sc_ac);
return (error);
}
int
vlan_multi_del(struct vlan_softc *sc, struct ifreq *ifr)
{
struct ifnet *ifp0;
struct ether_multi *enm;
struct vlan_mc_entry *mc;
uint8_t addrlo[ETHER_ADDR_LEN], addrhi[ETHER_ADDR_LEN];
int error;
/*
* Find a key to lookup vlan_mc_entry. We have to do this
* before calling ether_delmulti for obvious reason.
*/
if ((error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi)) != 0)
return (error);
ETHER_LOOKUP_MULTI(addrlo, addrhi, &sc->sc_ac, enm);
if (enm == NULL)
return (EINVAL);
LIST_FOREACH(mc, &sc->sc_mc_listhead, mc_entries) {
if (mc->mc_enm == enm)
break;
}
/* We won't delete entries we didn't add */
if (mc == NULL)
return (EINVAL);
error = ether_delmulti(ifr, &sc->sc_ac);
if (error != ENETRESET)
return (error);
if (!ISSET(sc->sc_if.if_flags, IFF_RUNNING))
goto forget;
ifp0 = if_get(sc->sc_ifidx0);
error = (ifp0 == NULL) ? 0 :
(*ifp0->if_ioctl)(ifp0, SIOCDELMULTI, (caddr_t)ifr);
if_put(ifp0);
if (error != 0) {
(void)ether_addmulti(ifr, &sc->sc_ac);
return (error);
}
forget:
/* forget about this address */
LIST_REMOVE(mc, mc_entries);
free(mc, M_DEVBUF, sizeof(*mc));
return (0);
}
int
vlan_media_get(struct vlan_softc *sc, struct ifreq *ifr)
{
struct ifnet *ifp0;
int error;
ifp0 = if_get(sc->sc_ifidx0);
error = (ifp0 == NULL) ? ENOTTY :
(*ifp0->if_ioctl)(ifp0, SIOCGIFMEDIA, (caddr_t)ifr);
if_put(ifp0);
return (error);
}
void
vlan_multi_apply(struct vlan_softc *sc, struct ifnet *ifp0, u_long cmd)
{
struct vlan_mc_entry *mc;
union {
struct ifreq ifreq;
struct {
char ifr_name[IFNAMSIZ];
struct sockaddr_storage ifr_ss;
} ifreq_storage;
} ifreq;
struct ifreq *ifr = &ifreq.ifreq;
memcpy(ifr->ifr_name, ifp0->if_xname, IFNAMSIZ);
LIST_FOREACH(mc, &sc->sc_mc_listhead, mc_entries) {
memcpy(&ifr->ifr_addr, &mc->mc_addr, mc->mc_addr.ss_len);
(void)(*ifp0->if_ioctl)(ifp0, cmd, (caddr_t)ifr);
}
}
void
vlan_multi_free(struct vlan_softc *sc)
{
struct vlan_mc_entry *mc;
while ((mc = LIST_FIRST(&sc->sc_mc_listhead)) != NULL) {
LIST_REMOVE(mc, mc_entries);
free(mc, M_DEVBUF, sizeof(*mc));
}
}
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