diff options
Diffstat (limited to 'freebsd/sys/net/if_vlan.c')
-rw-r--r-- | freebsd/sys/net/if_vlan.c | 201 |
1 files changed, 105 insertions, 96 deletions
diff --git a/freebsd/sys/net/if_vlan.c b/freebsd/sys/net/if_vlan.c index 576243d9..81c151a5 100644 --- a/freebsd/sys/net/if_vlan.c +++ b/freebsd/sys/net/if_vlan.c @@ -36,9 +36,8 @@ * 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. + * ether_output() sends to us via if_transmit(), rewrite them for + * use by the real outgoing interface, and ask it to send them. */ #include <sys/cdefs.h> @@ -181,16 +180,17 @@ static __inline struct ifvlan * vlan_gethash(struct ifvlantrunk *trunk, #endif static void trunk_destroy(struct ifvlantrunk *trunk); -static void vlan_start(struct ifnet *ifp); static void vlan_init(void *foo); static void vlan_input(struct ifnet *ifp, struct mbuf *m); static int vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr); +static void vlan_qflush(struct ifnet *ifp); static int vlan_setflag(struct ifnet *ifp, int flag, int status, int (*func)(struct ifnet *, int)); static int vlan_setflags(struct ifnet *ifp, int status); static int vlan_setmulti(struct ifnet *ifp); +static int vlan_transmit(struct ifnet *ifp, struct mbuf *m); static void vlan_unconfig(struct ifnet *ifp); -static void vlan_unconfig_locked(struct ifnet *ifp); +static void vlan_unconfig_locked(struct ifnet *ifp, int departing); static int vlan_config(struct ifvlan *ifv, struct ifnet *p, uint16_t tag); static void vlan_link_state(struct ifnet *ifp, int link); static void vlan_capabilities(struct ifvlan *ifv); @@ -545,7 +545,7 @@ vlan_ifdetach(void *arg __unused, struct ifnet *ifp) #ifdef VLAN_ARRAY for (i = 0; i < VLAN_ARRAY_SIZE; i++) if ((ifv = ifp->if_vlantrunk->vlans[i])) { - vlan_unconfig_locked(ifv->ifv_ifp); + vlan_unconfig_locked(ifv->ifv_ifp, 1); if (ifp->if_vlantrunk == NULL) break; } @@ -553,7 +553,7 @@ vlan_ifdetach(void *arg __unused, struct ifnet *ifp) restart: for (i = 0; i < (1 << ifp->if_vlantrunk->hwidth); i++) if ((ifv = LIST_FIRST(&ifp->if_vlantrunk->hash[i]))) { - vlan_unconfig_locked(ifv->ifv_ifp); + vlan_unconfig_locked(ifv->ifv_ifp, 1); if (ifp->if_vlantrunk) goto restart; /* trunk->hwidth can change */ else @@ -809,9 +809,9 @@ vlan_clone_create(struct if_clone *ifc, char *name, size_t len, caddr_t params) /* NB: mtu is not set here */ ifp->if_init = vlan_init; - ifp->if_start = vlan_start; + ifp->if_transmit = vlan_transmit; + ifp->if_qflush = vlan_qflush; ifp->if_ioctl = vlan_ioctl; - ifp->if_snd.ifq_maxlen = ifqmaxlen; ifp->if_flags = VLAN_IFFLAGS; ether_ifattach(ifp, eaddr); /* Now undo some of the damage... */ @@ -823,7 +823,7 @@ vlan_clone_create(struct if_clone *ifc, char *name, size_t len, caddr_t params) error = vlan_config(ifv, p, tag); if (error != 0) { /* - * Since we've partialy failed, we need to back + * Since we've partially failed, we need to back * out all the way, otherwise userland could get * confused. Thus, we destroy the interface. */ @@ -867,99 +867,99 @@ vlan_init(void *foo __unused) } /* - * The if_start method for vlan(4) interface. It doesn't - * raises the IFF_DRV_OACTIVE flag, since it is called - * only from IFQ_HANDOFF() macro in ether_output_frame(). - * If the interface queue is full, and vlan_start() is - * not called, the queue would never get emptied and - * interface would stall forever. + * The if_transmit method for vlan(4) interface. */ -static void -vlan_start(struct ifnet *ifp) +static int +vlan_transmit(struct ifnet *ifp, struct mbuf *m) { struct ifvlan *ifv; struct ifnet *p; - struct mbuf *m; - int error; + int error, len, mcast; ifv = ifp->if_softc; p = PARENT(ifv); + len = m->m_pkthdr.len; + mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; - for (;;) { - IF_DEQUEUE(&ifp->if_snd, m); - if (m == NULL) - break; - BPF_MTAP(ifp, m); + BPF_MTAP(ifp, m); - /* - * Do not run parent's if_start() if the parent is not up, - * or parent's driver will cause a system crash. - */ - if (!UP_AND_RUNNING(p)) { - m_freem(m); - ifp->if_collisions++; - continue; - } + /* + * Do not run parent's if_transmit() if the parent is not up, + * or parent's driver will cause a system crash. + */ + if (!UP_AND_RUNNING(p)) { + m_freem(m); + ifp->if_oerrors++; + return (0); + } - /* - * Pad the frame to the minimum size allowed if told to. - * This option is in accord with IEEE Std 802.1Q, 2003 Ed., - * paragraph C.4.4.3.b. It can help to work around buggy - * bridges that violate paragraph C.4.4.3.a from the same - * document, i.e., fail to pad short frames after untagging. - * E.g., a tagged frame 66 bytes long (incl. FCS) is OK, but - * untagging it will produce a 62-byte frame, which is a runt - * and requires padding. There are VLAN-enabled network - * devices that just discard such runts instead or mishandle - * them somehow. - */ - if (soft_pad) { - static char pad[8]; /* just zeros */ - int n; - - for (n = ETHERMIN + ETHER_HDR_LEN - m->m_pkthdr.len; - n > 0; n -= sizeof(pad)) - if (!m_append(m, min(n, sizeof(pad)), pad)) - break; - - if (n > 0) { - if_printf(ifp, "cannot pad short frame\n"); - ifp->if_oerrors++; - m_freem(m); - continue; - } - } + /* + * Pad the frame to the minimum size allowed if told to. + * This option is in accord with IEEE Std 802.1Q, 2003 Ed., + * paragraph C.4.4.3.b. It can help to work around buggy + * bridges that violate paragraph C.4.4.3.a from the same + * document, i.e., fail to pad short frames after untagging. + * E.g., a tagged frame 66 bytes long (incl. FCS) is OK, but + * untagging it will produce a 62-byte frame, which is a runt + * and requires padding. There are VLAN-enabled network + * devices that just discard such runts instead or mishandle + * them somehow. + */ + if (soft_pad) { + static char pad[8]; /* just zeros */ + int n; - /* - * If underlying interface can do VLAN tag insertion itself, - * just pass the packet along. However, we need some way to - * tell the interface where the packet came from so that it - * knows how to find the VLAN tag to use, so we attach a - * packet tag that holds it. - */ - if (p->if_capenable & IFCAP_VLAN_HWTAGGING) { - m->m_pkthdr.ether_vtag = ifv->ifv_tag; - m->m_flags |= M_VLANTAG; - } else { - m = ether_vlanencap(m, ifv->ifv_tag); - if (m == NULL) { - if_printf(ifp, - "unable to prepend VLAN header\n"); - ifp->if_oerrors++; - continue; - } + for (n = ETHERMIN + ETHER_HDR_LEN - m->m_pkthdr.len; + n > 0; n -= sizeof(pad)) + if (!m_append(m, min(n, sizeof(pad)), pad)) + break; + + if (n > 0) { + if_printf(ifp, "cannot pad short frame\n"); + ifp->if_oerrors++; + m_freem(m); + return (0); } + } - /* - * Send it, precisely as ether_output() would have. - * We are already running at splimp. - */ - error = (p->if_transmit)(p, m); - if (!error) - ifp->if_opackets++; - else + /* + * If underlying interface can do VLAN tag insertion itself, + * just pass the packet along. However, we need some way to + * tell the interface where the packet came from so that it + * knows how to find the VLAN tag to use, so we attach a + * packet tag that holds it. + */ + if (p->if_capenable & IFCAP_VLAN_HWTAGGING) { + m->m_pkthdr.ether_vtag = ifv->ifv_tag; + m->m_flags |= M_VLANTAG; + } else { + m = ether_vlanencap(m, ifv->ifv_tag); + if (m == NULL) { + if_printf(ifp, "unable to prepend VLAN header\n"); ifp->if_oerrors++; + return (0); + } } + + /* + * Send it, precisely as ether_output() would have. + */ + error = (p->if_transmit)(p, m); + if (!error) { + ifp->if_opackets++; + ifp->if_omcasts += mcast; + ifp->if_obytes += len; + } else + ifp->if_oerrors++; + return (error); +} + +/* + * The ifp->if_qflush entry point for vlan(4) is a no-op. + */ +static void +vlan_qflush(struct ifnet *ifp __unused) +{ } static void @@ -1165,17 +1165,18 @@ vlan_unconfig(struct ifnet *ifp) { VLAN_LOCK(); - vlan_unconfig_locked(ifp); + vlan_unconfig_locked(ifp, 0); VLAN_UNLOCK(); } static void -vlan_unconfig_locked(struct ifnet *ifp) +vlan_unconfig_locked(struct ifnet *ifp, int departing) { struct ifvlantrunk *trunk; struct vlan_mc_entry *mc; struct ifvlan *ifv; struct ifnet *parent; + int error; VLAN_LOCK_ASSERT(); @@ -1206,13 +1207,21 @@ vlan_unconfig_locked(struct ifnet *ifp) ETHER_ADDR_LEN); /* - * This may fail if the parent interface is - * being detached. Regardless, we should do a - * best effort to free this interface as much - * as possible as all callers expect vlan - * destruction to succeed. + * If the parent interface is being detached, + * all its multicast addresses have already + * been removed. Warn about errors if + * if_delmulti() does fail, but don't abort as + * all callers expect vlan destruction to + * succeed. */ - (void)if_delmulti(parent, (struct sockaddr *)&sdl); + if (!departing) { + error = if_delmulti(parent, + (struct sockaddr *)&sdl); + if (error) + if_printf(ifp, + "Failed to delete multicast address from parent: %d\n", + error); + } SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries); free(mc, M_VLAN); } |