diff options
Diffstat (limited to 'drivers/net/tap/rte_eth_tap.c')
| -rw-r--r-- | drivers/net/tap/rte_eth_tap.c | 49 |
1 files changed, 32 insertions, 17 deletions
diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c index 49afd38d..a9342997 100644 --- a/drivers/net/tap/rte_eth_tap.c +++ b/drivers/net/tap/rte_eth_tap.c @@ -78,9 +78,6 @@ static const char *valid_arguments[] = { NULL }; -static unsigned int tap_unit; -static unsigned int tun_unit; - static char tuntap_name[8]; static volatile uint32_t tap_trigger; /* Rx trigger */ @@ -150,8 +147,6 @@ tun_alloc(struct pmd_internals *pmd, int is_keepalive) IFF_TAP : IFF_TUN | IFF_POINTOPOINT; snprintf(ifr.ifr_name, IFNAMSIZ, "%s", pmd->name); - TAP_LOG(DEBUG, "ifr_name '%s'", ifr.ifr_name); - fd = open(TUN_TAP_DEV_PATH, O_RDWR); if (fd < 0) { TAP_LOG(ERR, "Unable to create %s interface", tuntap_name); @@ -185,6 +180,13 @@ tun_alloc(struct pmd_internals *pmd, int is_keepalive) goto error; } + /* + * Name passed to kernel might be wildcard like dtun%d + * and need to find the resulting device. + */ + TAP_LOG(DEBUG, "Device name is '%s'", ifr.ifr_name); + strlcpy(pmd->name, ifr.ifr_name, RTE_ETH_NAME_MAX_LEN); + if (is_keepalive) { /* * Detach the TUN/TAP keep-alive queue @@ -281,13 +283,27 @@ tap_verify_csum(struct rte_mbuf *mbuf) l3_len = 4 * (iph->version_ihl & 0xf); if (unlikely(l2_len + l3_len > rte_pktmbuf_data_len(mbuf))) return; + /* check that the total length reported by header is not + * greater than the total received size + */ + if (l2_len + rte_be_to_cpu_16(iph->total_length) > + rte_pktmbuf_data_len(mbuf)) + return; cksum = ~rte_raw_cksum(iph, l3_len); mbuf->ol_flags |= cksum ? PKT_RX_IP_CKSUM_BAD : PKT_RX_IP_CKSUM_GOOD; } else if (l3 == RTE_PTYPE_L3_IPV6) { + struct ipv6_hdr *iph = l3_hdr; + l3_len = sizeof(struct ipv6_hdr); + /* check that the total length reported by header is not + * greater than the total received size + */ + if (l2_len + l3_len + rte_be_to_cpu_16(iph->payload_len) > + rte_pktmbuf_data_len(mbuf)) + return; } else { /* IPv6 extensions are not supported */ return; @@ -1741,6 +1757,7 @@ eth_dev_tap_create(struct rte_vdev_device *vdev, char *tap_name, TAP_LOG(ERR, "Unable to create %s interface", tuntap_name); goto error_exit; } + TAP_LOG(DEBUG, "allocated %s", pmd->name); ifr.ifr_mtu = dev->data->mtu; if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0) @@ -1878,10 +1895,10 @@ set_interface_name(const char *key __rte_unused, char *name = (char *)extra_args; if (value) - strlcpy(name, value, RTE_ETH_NAME_MAX_LEN - 1); + strlcpy(name, value, RTE_ETH_NAME_MAX_LEN); else - snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s%d", - DEFAULT_TAP_NAME, (tap_unit - 1)); + /* use tap%d which causes kernel to choose next available */ + strlcpy(name, DEFAULT_TAP_NAME "%d", RTE_ETH_NAME_MAX_LEN); return 0; } @@ -1988,8 +2005,8 @@ rte_pmd_tun_probe(struct rte_vdev_device *dev) return 0; } - snprintf(tun_name, sizeof(tun_name), "%s%u", - DEFAULT_TUN_NAME, tun_unit++); + /* use tun%d which causes kernel to choose next available */ + strlcpy(tun_name, DEFAULT_TUN_NAME "%d", RTE_ETH_NAME_MAX_LEN); if (params && (params[0] != '\0')) { TAP_LOG(DEBUG, "parameters (%s)", params); @@ -2009,17 +2026,15 @@ rte_pmd_tun_probe(struct rte_vdev_device *dev) } pmd_link.link_speed = ETH_SPEED_NUM_10G; - TAP_LOG(NOTICE, "Initializing pmd_tun for %s as %s", - name, tun_name); + TAP_LOG(NOTICE, "Initializing pmd_tun for %s", name); ret = eth_dev_tap_create(dev, tun_name, remote_iface, 0, - ETH_TUNTAP_TYPE_TUN); + ETH_TUNTAP_TYPE_TUN); leave: if (ret == -1) { TAP_LOG(ERR, "Failed to create pmd for %s as %s", name, tun_name); - tun_unit--; /* Restore the unit number */ } rte_kvargs_free(kvlist); @@ -2175,8 +2190,9 @@ rte_pmd_tap_probe(struct rte_vdev_device *dev) } speed = ETH_SPEED_NUM_10G; - snprintf(tap_name, sizeof(tap_name), "%s%u", - DEFAULT_TAP_NAME, tap_unit++); + + /* use tap%d which causes kernel to choose next available */ + strlcpy(tap_name, DEFAULT_TAP_NAME "%d", RTE_ETH_NAME_MAX_LEN); memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN); if (params && (params[0] != '\0')) { @@ -2240,7 +2256,6 @@ leave: rte_mp_action_unregister(TAP_MP_KEY); tap_devices_count--; } - tap_unit--; /* Restore the unit number */ } rte_kvargs_free(kvlist); |