diff options
Diffstat (limited to 'freebsd/sys/net/if_ethersubr.c')
| -rw-r--r-- | freebsd/sys/net/if_ethersubr.c | 144 |
1 files changed, 131 insertions, 13 deletions
diff --git a/freebsd/sys/net/if_ethersubr.c b/freebsd/sys/net/if_ethersubr.c index 24f11436..78ff2385 100644 --- a/freebsd/sys/net/if_ethersubr.c +++ b/freebsd/sys/net/if_ethersubr.c @@ -49,6 +49,7 @@ #include <sys/malloc.h> #include <sys/module.h> #include <sys/mbuf.h> +#include <sys/priv.h> #include <sys/random.h> #include <sys/socket.h> #include <sys/sockio.h> @@ -313,7 +314,13 @@ ether_output(struct ifnet *ifp, struct mbuf *m, if (lle == NULL) { /* if we lookup, keep cache */ addref = 1; - } + } else + /* + * Notify LLE code that + * the entry was used + * by datapath. + */ + llentry_mark_used(lle); } if (lle != NULL) { phdr = lle->r_linkdata; @@ -433,6 +440,19 @@ bad: if (m != NULL) return ether_output_frame(ifp, m); } +static bool +ether_set_pcp(struct mbuf **mp, struct ifnet *ifp, uint8_t pcp) +{ + struct ether_header *eh; + + eh = mtod(*mp, struct ether_header *); + if (ntohs(eh->ether_type) == ETHERTYPE_VLAN || + ether_8021q_frame(mp, ifp, ifp, 0, pcp)) + return (true); + if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); + return (false); +} + /* * Ethernet link layer output routine to send a raw frame to the device. * @@ -442,12 +462,17 @@ bad: if (m != NULL) int ether_output_frame(struct ifnet *ifp, struct mbuf *m) { - int i; + int error; + uint8_t pcp; - if (PFIL_HOOKED(&V_link_pfil_hook)) { - i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_OUT, NULL); + pcp = ifp->if_pcp; + if (pcp != IFNET_PCP_NONE && !ether_set_pcp(&m, ifp, pcp)) + return (0); - if (i != 0) + if (PFIL_HOOKED(&V_link_pfil_hook)) { + error = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, + PFIL_OUT, 0, NULL); + if (error != 0) return (EACCES); if (m == NULL) @@ -778,7 +803,8 @@ ether_demux(struct ifnet *ifp, struct mbuf *m) /* Do not grab PROMISC frames in case we are re-entered. */ if (PFIL_HOOKED(&V_link_pfil_hook) && !(m->m_flags & M_PROMISC)) { - i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_IN, NULL); + i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_IN, 0, + NULL); if (i != 0 || m == NULL) return; @@ -1084,13 +1110,8 @@ ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) break; case SIOCGIFADDR: - { - struct sockaddr *sa; - - sa = (struct sockaddr *) & ifr->ifr_data; - bcopy(IF_LLADDR(ifp), - (caddr_t) sa->sa_data, ETHER_ADDR_LEN); - } + bcopy(IF_LLADDR(ifp), &ifr->ifr_addr.sa_data[0], + ETHER_ADDR_LEN); break; case SIOCSIFMTU: @@ -1103,6 +1124,22 @@ ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) ifp->if_mtu = ifr->ifr_mtu; } break; + + case SIOCSLANPCP: + error = priv_check(curthread, PRIV_NET_SETLANPCP); + if (error != 0) + break; + if (ifr->ifr_lan_pcp > 7 && + ifr->ifr_lan_pcp != IFNET_PCP_NONE) + error = EINVAL; + else + ifp->if_pcp = ifr->ifr_lan_pcp; + break; + + case SIOCGLANPCP: + ifr->ifr_lan_pcp = ifp->if_pcp; + break; + default: error = EINVAL; /* XXX netbsd has ENOTTY??? */ break; @@ -1251,5 +1288,86 @@ ether_vlanencap(struct mbuf *m, uint16_t tag) return (m); } +static SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, + "IEEE 802.1Q VLAN"); +static SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, + "for consistency"); + +static VNET_DEFINE(int, soft_pad); +#define V_soft_pad VNET(soft_pad) +SYSCTL_INT(_net_link_vlan, OID_AUTO, soft_pad, CTLFLAG_RW | CTLFLAG_VNET, + &VNET_NAME(soft_pad), 0, + "pad short frames before tagging"); + +/* + * For now, make preserving PCP via an mbuf tag optional, as it increases + * per-packet memory allocations and frees. In the future, it would be + * preferable to reuse ether_vtag for this, or similar. + */ +int vlan_mtag_pcp = 0; +SYSCTL_INT(_net_link_vlan, OID_AUTO, mtag_pcp, CTLFLAG_RW, + &vlan_mtag_pcp, 0, + "Retain VLAN PCP information as packets are passed up the stack"); + +bool +ether_8021q_frame(struct mbuf **mp, struct ifnet *ife, struct ifnet *p, + uint16_t vid, uint8_t pcp) +{ + struct m_tag *mtag; + int n; + uint16_t tag; + static const char pad[8]; /* just zeros */ + + /* + * 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 (V_soft_pad && p->if_type == IFT_ETHER) { + for (n = ETHERMIN + ETHER_HDR_LEN - (*mp)->m_pkthdr.len; + n > 0; n -= sizeof(pad)) { + if (!m_append(*mp, min(n, sizeof(pad)), pad)) + break; + } + if (n > 0) { + m_freem(*mp); + *mp = NULL; + if_printf(ife, "cannot pad short frame"); + return (false); + } + } + + /* + * 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 (vlan_mtag_pcp && (mtag = m_tag_locate(*mp, MTAG_8021Q, + MTAG_8021Q_PCP_OUT, NULL)) != NULL) + tag = EVL_MAKETAG(vid, *(uint8_t *)(mtag + 1), 0); + else + tag = EVL_MAKETAG(vid, pcp, 0); + if (p->if_capenable & IFCAP_VLAN_HWTAGGING) { + (*mp)->m_pkthdr.ether_vtag = tag; + (*mp)->m_flags |= M_VLANTAG; + } else { + *mp = ether_vlanencap(*mp, tag); + if (*mp == NULL) { + if_printf(ife, "unable to prepend 802.1Q header"); + return (false); + } + } + return (true); +} + DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); MODULE_VERSION(ether, 1); |