diff options
Diffstat (limited to 'drivers/net/tap/rte_eth_tap.c')
| -rw-r--r-- | drivers/net/tap/rte_eth_tap.c | 521 |
1 files changed, 334 insertions, 187 deletions
diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c index e44de027..9acea839 100644 --- a/drivers/net/tap/rte_eth_tap.c +++ b/drivers/net/tap/rte_eth_tap.c @@ -1,7 +1,7 @@ /*- * BSD LICENSE * - * Copyright(c) 2016 Intel Corporation. All rights reserved. + * Copyright(c) 2016-2017 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -33,6 +33,7 @@ #include <rte_atomic.h> #include <rte_branch_prediction.h> +#include <rte_byteorder.h> #include <rte_common.h> #include <rte_mbuf.h> #include <rte_ethdev.h> @@ -41,6 +42,8 @@ #include <rte_vdev.h> #include <rte_kvargs.h> #include <rte_net.h> +#include <rte_debug.h> +#include <rte_ip.h> #include <sys/types.h> #include <sys/stat.h> @@ -72,6 +75,8 @@ #define ETH_TAP_IFACE_ARG "iface" #define ETH_TAP_SPEED_ARG "speed" #define ETH_TAP_REMOTE_ARG "remote" +#define ETH_TAP_MAC_ARG "mac" +#define ETH_TAP_MAC_FIXED "fixed" #define FLOWER_KERNEL_VERSION KERNEL_VERSION(4, 2, 0) #define FLOWER_VLAN_KERNEL_VERSION KERNEL_VERSION(4, 9, 0) @@ -82,6 +87,7 @@ static const char *valid_arguments[] = { ETH_TAP_IFACE_ARG, ETH_TAP_SPEED_ARG, ETH_TAP_REMOTE_ARG, + ETH_TAP_MAC_ARG, NULL }; @@ -110,10 +116,6 @@ enum ioctl_mode { REMOTE_ONLY, }; -static int -tap_ioctl(struct pmd_internals *pmd, unsigned long request, - struct ifreq *ifr, int set, enum ioctl_mode mode); - static int tap_intr_handle_set(struct rte_eth_dev *dev, int set); /* Tun/Tap allocation routine @@ -122,7 +124,7 @@ static int tap_intr_handle_set(struct rte_eth_dev *dev, int set); * supplied name. */ static int -tun_alloc(struct pmd_internals *pmd, uint16_t qid) +tun_alloc(struct pmd_internals *pmd) { struct ifreq ifr; #ifdef IFF_MULTI_QUEUE @@ -143,7 +145,7 @@ tun_alloc(struct pmd_internals *pmd, uint16_t qid) fd = open(TUN_TAP_DEV_PATH, O_RDWR); if (fd < 0) { - RTE_LOG(ERR, PMD, "Unable to create TAP interface"); + RTE_LOG(ERR, PMD, "Unable to create TAP interface\n"); goto error; } @@ -221,75 +223,6 @@ tun_alloc(struct pmd_internals *pmd, uint16_t qid) strerror(errno)); } - if (qid == 0) { - struct ifreq ifr; - - /* - * pmd->eth_addr contains the desired MAC, either from remote - * or from a random assignment. Sync it with the tap netdevice. - */ - ifr.ifr_hwaddr.sa_family = AF_LOCAL; - rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr, - ETHER_ADDR_LEN); - if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) - goto error; - - pmd->if_index = if_nametoindex(pmd->name); - if (!pmd->if_index) { - RTE_LOG(ERR, PMD, - "Could not find ifindex for %s: rte_flow won't be usable.\n", - pmd->name); - return fd; - } - if (!pmd->flower_support) - return fd; - if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) { - RTE_LOG(ERR, PMD, - "Could not create multiq qdisc for %s: rte_flow won't be usable.\n", - pmd->name); - return fd; - } - if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) { - RTE_LOG(ERR, PMD, - "Could not create multiq qdisc for %s: rte_flow won't be usable.\n", - pmd->name); - return fd; - } - if (pmd->remote_if_index) { - /* - * Flush usually returns negative value because it tries - * to delete every QDISC (and on a running device, one - * QDISC at least is needed). Ignore negative return - * value. - */ - qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index); - if (qdisc_create_ingress(pmd->nlsk_fd, - pmd->remote_if_index) < 0) - goto remote_fail; - LIST_INIT(&pmd->implicit_flows); - if (tap_flow_implicit_create( - pmd, TAP_REMOTE_LOCAL_MAC) < 0) - goto remote_fail; - if (tap_flow_implicit_create( - pmd, TAP_REMOTE_BROADCAST) < 0) - goto remote_fail; - if (tap_flow_implicit_create( - pmd, TAP_REMOTE_BROADCASTV6) < 0) - goto remote_fail; - if (tap_flow_implicit_create( - pmd, TAP_REMOTE_TX) < 0) - goto remote_fail; - } - } - - return fd; - -remote_fail: - RTE_LOG(ERR, PMD, - "Could not set up remote flow rules for %s: remote disabled.\n", - pmd->name); - pmd->remote_if_index = 0; - tap_flow_implicit_flush(pmd, NULL); return fd; error: @@ -298,6 +231,60 @@ error: return -1; } +static void +tap_verify_csum(struct rte_mbuf *mbuf) +{ + uint32_t l2 = mbuf->packet_type & RTE_PTYPE_L2_MASK; + uint32_t l3 = mbuf->packet_type & RTE_PTYPE_L3_MASK; + uint32_t l4 = mbuf->packet_type & RTE_PTYPE_L4_MASK; + unsigned int l2_len = sizeof(struct ether_hdr); + unsigned int l3_len; + uint16_t cksum = 0; + void *l3_hdr; + void *l4_hdr; + + if (l2 == RTE_PTYPE_L2_ETHER_VLAN) + l2_len += 4; + else if (l2 == RTE_PTYPE_L2_ETHER_QINQ) + l2_len += 8; + /* Don't verify checksum for packets with discontinuous L2 header */ + if (unlikely(l2_len + sizeof(struct ipv4_hdr) > + rte_pktmbuf_data_len(mbuf))) + return; + l3_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len); + if (l3 == RTE_PTYPE_L3_IPV4 || l3 == RTE_PTYPE_L3_IPV4_EXT) { + struct ipv4_hdr *iph = l3_hdr; + + /* ihl contains the number of 4-byte words in the header */ + l3_len = 4 * (iph->version_ihl & 0xf); + if (unlikely(l2_len + l3_len > 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) { + l3_len = sizeof(struct ipv6_hdr); + } else { + /* IPv6 extensions are not supported */ + return; + } + if (l4 == RTE_PTYPE_L4_UDP || l4 == RTE_PTYPE_L4_TCP) { + l4_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len + l3_len); + /* Don't verify checksum for multi-segment packets. */ + if (mbuf->nb_segs > 1) + return; + if (l3 == RTE_PTYPE_L3_IPV4) + cksum = ~rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr); + else if (l3 == RTE_PTYPE_L3_IPV6) + cksum = ~rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr); + mbuf->ol_flags |= cksum ? + PKT_RX_L4_CKSUM_BAD : + PKT_RX_L4_CKSUM_GOOD; + } +} + /* Callback to handle the rx burst of packets to the correct interface and * file descriptor(s) in a multi-queue setup. */ @@ -378,6 +365,8 @@ pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) seg->next = NULL; mbuf->packet_type = rte_net_get_ptype(mbuf, NULL, RTE_PTYPE_ALL_MASK); + if (rxq->rxmode->hw_ip_checksum) + tap_verify_csum(mbuf); /* account for the receive frame */ bufs[num_rx++] = mbuf; @@ -390,6 +379,56 @@ end: return num_rx; } +static void +tap_tx_offload(char *packet, uint64_t ol_flags, unsigned int l2_len, + unsigned int l3_len) +{ + void *l3_hdr = packet + l2_len; + + if (ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4)) { + struct ipv4_hdr *iph = l3_hdr; + uint16_t cksum; + + iph->hdr_checksum = 0; + cksum = rte_raw_cksum(iph, l3_len); + iph->hdr_checksum = (cksum == 0xffff) ? cksum : ~cksum; + } + if (ol_flags & PKT_TX_L4_MASK) { + uint16_t l4_len; + uint32_t cksum; + uint16_t *l4_cksum; + void *l4_hdr; + + l4_hdr = packet + l2_len + l3_len; + if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM) + l4_cksum = &((struct udp_hdr *)l4_hdr)->dgram_cksum; + else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM) + l4_cksum = &((struct tcp_hdr *)l4_hdr)->cksum; + else + return; + *l4_cksum = 0; + if (ol_flags & PKT_TX_IPV4) { + struct ipv4_hdr *iph = l3_hdr; + + l4_len = rte_be_to_cpu_16(iph->total_length) - l3_len; + cksum = rte_ipv4_phdr_cksum(l3_hdr, 0); + } else { + struct ipv6_hdr *ip6h = l3_hdr; + + /* payload_len does not include ext headers */ + l4_len = rte_be_to_cpu_16(ip6h->payload_len) - + l3_len + sizeof(struct ipv6_hdr); + cksum = rte_ipv6_phdr_cksum(l3_hdr, 0); + } + cksum += rte_raw_cksum(l4_hdr, l4_len); + cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff); + cksum = (~cksum) & 0xffff; + if (cksum == 0) + cksum = 0xffff; + *l4_cksum = cksum; + } +} + /* Callback to handle sending packets from the tap interface */ static uint16_t @@ -410,6 +449,7 @@ pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) struct iovec iovecs[mbuf->nb_segs + 1]; struct tun_pi pi = { .flags = 0 }; struct rte_mbuf *seg = mbuf; + char m_copy[mbuf->data_len]; int n; int j; @@ -425,6 +465,19 @@ pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) rte_pktmbuf_mtod(seg, void *); seg = seg->next; } + if (mbuf->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4) || + (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM || + (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM) { + /* Support only packets with all data in the same seg */ + if (mbuf->nb_segs > 1) + break; + /* To change checksums, work on a copy of data. */ + rte_memcpy(m_copy, rte_pktmbuf_mtod(mbuf, void *), + rte_pktmbuf_data_len(mbuf)); + tap_tx_offload(m_copy, mbuf->ol_flags, + mbuf->l2_len, mbuf->l3_len); + iovecs[1].iov_base = m_copy; + } /* copy the tx frame data */ n = writev(txq->fd, iovecs, mbuf->nb_segs + 1); if (n <= 0) @@ -442,6 +495,24 @@ pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) return num_tx; } +static const char * +tap_ioctl_req2str(unsigned long request) +{ + switch (request) { + case SIOCSIFFLAGS: + return "SIOCSIFFLAGS"; + case SIOCGIFFLAGS: + return "SIOCGIFFLAGS"; + case SIOCGIFHWADDR: + return "SIOCGIFHWADDR"; + case SIOCSIFHWADDR: + return "SIOCSIFHWADDR"; + case SIOCSIFMTU: + return "SIOCSIFMTU"; + } + return "UNKNOWN"; +} + static int tap_ioctl(struct pmd_internals *pmd, unsigned long request, struct ifreq *ifr, int set, enum ioctl_mode mode) @@ -477,9 +548,7 @@ apply: case SIOCSIFMTU: break; default: - RTE_LOG(WARNING, PMD, "%s: ioctl() called with wrong arg\n", - pmd->name); - return -EINVAL; + RTE_ASSERT(!"unsupported request type: must not happen"); } if (ioctl(pmd->ioctl_sock, request, ifr) < 0) goto error; @@ -488,8 +557,8 @@ apply: return 0; error: - RTE_LOG(ERR, PMD, "%s: ioctl(%lu) failed with error: %s\n", - ifr->ifr_name, request, strerror(errno)); + RTE_LOG(DEBUG, PMD, "%s: %s(%s) failed: %s(%d)\n", ifr->ifr_name, + __func__, tap_ioctl_req2str(request), strerror(errno), errno); return -errno; } @@ -500,7 +569,7 @@ tap_link_set_down(struct rte_eth_dev *dev) struct ifreq ifr = { .ifr_flags = IFF_UP }; dev->data->dev_link.link_status = ETH_LINK_DOWN; - return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE); + return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_ONLY); } static int @@ -586,6 +655,13 @@ tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) dev_info->min_rx_bufsize = 0; dev_info->pci_dev = NULL; dev_info->speed_capa = tap_dev_speed_capa(); + dev_info->rx_offload_capa = (DEV_RX_OFFLOAD_IPV4_CKSUM | + DEV_RX_OFFLOAD_UDP_CKSUM | + DEV_RX_OFFLOAD_TCP_CKSUM); + dev_info->tx_offload_capa = + (DEV_TX_OFFLOAD_IPV4_CKSUM | + DEV_TX_OFFLOAD_UDP_CKSUM | + DEV_TX_OFFLOAD_TCP_CKSUM); } static void @@ -644,7 +720,7 @@ tap_stats_reset(struct rte_eth_dev *dev) } static void -tap_dev_close(struct rte_eth_dev *dev __rte_unused) +tap_dev_close(struct rte_eth_dev *dev) { int i; struct pmd_internals *internals = dev->data->dev_private; @@ -659,6 +735,12 @@ tap_dev_close(struct rte_eth_dev *dev __rte_unused) internals->rxq[i].fd = -1; internals->txq[i].fd = -1; } + + if (internals->remote_if_index) { + /* Restore initial remote state */ + ioctl(internals->ioctl_sock, SIOCSIFFLAGS, + &internals->remote_initial_flags); + } } static void @@ -718,7 +800,7 @@ tap_promisc_enable(struct rte_eth_dev *dev) dev->data->promiscuous = 1; tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE); - if (pmd->remote_if_index) + if (pmd->remote_if_index && !pmd->flow_isolate) tap_flow_implicit_create(pmd, TAP_REMOTE_PROMISC); } @@ -730,7 +812,7 @@ tap_promisc_disable(struct rte_eth_dev *dev) dev->data->promiscuous = 0; tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE); - if (pmd->remote_if_index) + if (pmd->remote_if_index && !pmd->flow_isolate) tap_flow_implicit_destroy(pmd, TAP_REMOTE_PROMISC); } @@ -742,7 +824,7 @@ tap_allmulti_enable(struct rte_eth_dev *dev) dev->data->all_multicast = 1; tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE); - if (pmd->remote_if_index) + if (pmd->remote_if_index && !pmd->flow_isolate) tap_flow_implicit_create(pmd, TAP_REMOTE_ALLMULTI); } @@ -754,50 +836,51 @@ tap_allmulti_disable(struct rte_eth_dev *dev) dev->data->all_multicast = 0; tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE); - if (pmd->remote_if_index) + if (pmd->remote_if_index && !pmd->flow_isolate) tap_flow_implicit_destroy(pmd, TAP_REMOTE_ALLMULTI); } - static void tap_mac_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr) { struct pmd_internals *pmd = dev->data->dev_private; + enum ioctl_mode mode = LOCAL_ONLY; struct ifreq ifr; if (is_zero_ether_addr(mac_addr)) { RTE_LOG(ERR, PMD, "%s: can't set an empty MAC address\n", - dev->data->name); + dev->device->name); return; } /* Check the actual current MAC address on the tap netdevice */ - if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY) != 0) { - RTE_LOG(ERR, PMD, - "%s: couldn't check current tap MAC address\n", - dev->data->name); + if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) return; - } if (is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data, mac_addr)) return; - + /* Check the current MAC address on the remote */ + if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) + return; + if (!is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data, + mac_addr)) + mode = LOCAL_AND_REMOTE; ifr.ifr_hwaddr.sa_family = AF_LOCAL; rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, ETHER_ADDR_LEN); - if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, LOCAL_AND_REMOTE) < 0) + if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, mode) < 0) return; rte_memcpy(&pmd->eth_addr, mac_addr, ETHER_ADDR_LEN); - if (pmd->remote_if_index) { + if (pmd->remote_if_index && !pmd->flow_isolate) { /* Replace MAC redirection rule after a MAC change */ if (tap_flow_implicit_destroy(pmd, TAP_REMOTE_LOCAL_MAC) < 0) { RTE_LOG(ERR, PMD, "%s: Couldn't delete MAC redirection rule\n", - dev->data->name); + dev->device->name); return; } if (tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0) RTE_LOG(ERR, PMD, "%s: Couldn't add MAC redirection rule\n", - dev->data->name); + dev->device->name); } } @@ -809,30 +892,16 @@ tap_setup_queue(struct rte_eth_dev *dev, struct pmd_internals *pmd = dev->data->dev_private; struct rx_queue *rx = &internals->rxq[qid]; struct tx_queue *tx = &internals->txq[qid]; - int fd; + int fd = rx->fd == -1 ? tx->fd : rx->fd; - fd = rx->fd; - if (fd < 0) { - fd = tx->fd; + if (fd == -1) { + RTE_LOG(INFO, PMD, "Add queue to TAP %s for qid %d\n", + pmd->name, qid); + fd = tun_alloc(pmd); if (fd < 0) { - RTE_LOG(INFO, PMD, "Add queue to TAP %s for qid %d\n", - pmd->name, qid); - fd = tun_alloc(pmd, qid); - if (fd < 0) { - RTE_LOG(ERR, PMD, "tun_alloc(%s, %d) failed\n", - pmd->name, qid); - return -1; - } - if (qid == 0) { - struct ifreq ifr; - - ifr.ifr_mtu = dev->data->mtu; - if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, - LOCAL_AND_REMOTE) < 0) { - close(fd); - return -1; - } - } + RTE_LOG(ERR, PMD, "%s: tun_alloc() failed.\n", + pmd->name); + return -1; } } @@ -845,26 +914,6 @@ tap_setup_queue(struct rte_eth_dev *dev, } static int -rx_setup_queue(struct rte_eth_dev *dev, - struct pmd_internals *internals, - uint16_t qid) -{ - dev->data->rx_queues[qid] = &internals->rxq[qid]; - - return tap_setup_queue(dev, internals, qid); -} - -static int -tx_setup_queue(struct rte_eth_dev *dev, - struct pmd_internals *internals, - uint16_t qid) -{ - dev->data->tx_queues[qid] = &internals->txq[qid]; - - return tap_setup_queue(dev, internals, qid); -} - -static int tap_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id, uint16_t nb_rx_desc, @@ -894,17 +943,18 @@ tap_rx_queue_setup(struct rte_eth_dev *dev, rxq->trigger_seen = 1; /* force initial burst */ rxq->in_port = dev->data->port_id; rxq->nb_rx_desc = nb_desc; - iovecs = rte_zmalloc_socket(dev->data->name, sizeof(*iovecs), 0, + iovecs = rte_zmalloc_socket(dev->device->name, sizeof(*iovecs), 0, socket_id); if (!iovecs) { RTE_LOG(WARNING, PMD, "%s: Couldn't allocate %d RX descriptors\n", - dev->data->name, nb_desc); + dev->device->name, nb_desc); return -ENOMEM; } rxq->iovecs = iovecs; - fd = rx_setup_queue(dev, internals, rx_queue_id); + dev->data->rx_queues[rx_queue_id] = rxq; + fd = tap_setup_queue(dev, internals, rx_queue_id); if (fd == -1) { ret = fd; goto error; @@ -918,7 +968,7 @@ tap_rx_queue_setup(struct rte_eth_dev *dev, if (!*tmp) { RTE_LOG(WARNING, PMD, "%s: couldn't allocate memory for queue %d\n", - dev->data->name, rx_queue_id); + dev->device->name, rx_queue_id); ret = -ENOMEM; goto error; } @@ -955,7 +1005,8 @@ tap_tx_queue_setup(struct rte_eth_dev *dev, if (tx_queue_id >= internals->nb_queues) return -1; - ret = tx_setup_queue(dev, internals, tx_queue_id); + dev->data->tx_queues[tx_queue_id] = &internals->txq[tx_queue_id]; + ret = tap_setup_queue(dev, internals, tx_queue_id); if (ret == -1) return -1; @@ -1115,32 +1166,16 @@ static const struct eth_dev_ops ops = { .filter_ctrl = tap_dev_filter_ctrl, }; -static int -tap_kernel_support(struct pmd_internals *pmd) -{ - struct utsname utsname; - int ver[3]; - - if (uname(&utsname) == -1 || - sscanf(utsname.release, "%d.%d.%d", - &ver[0], &ver[1], &ver[2]) != 3) - return 0; - if (KERNEL_VERSION(ver[0], ver[1], ver[2]) >= FLOWER_KERNEL_VERSION) - pmd->flower_support = 1; - if (KERNEL_VERSION(ver[0], ver[1], ver[2]) >= - FLOWER_VLAN_KERNEL_VERSION) - pmd->flower_vlan_support = 1; - return 1; -} static int eth_dev_tap_create(struct rte_vdev_device *vdev, char *tap_name, - char *remote_iface) + char *remote_iface, int fixed_mac_type) { int numa_node = rte_socket_id(); struct rte_eth_dev *dev; struct pmd_internals *pmd; struct rte_eth_dev_data *data; + struct ifreq ifr; int i; RTE_LOG(DEBUG, PMD, " TAP device on numa %u\n", rte_socket_id()); @@ -1174,7 +1209,6 @@ eth_dev_tap_create(struct rte_vdev_device *vdev, char *tap_name, data->dev_private = pmd; data->dev_flags = RTE_ETH_DEV_DETACHABLE | RTE_ETH_DEV_INTR_LSC; data->numa_node = numa_node; - data->drv_name = pmd_tap_drv.driver.name; data->dev_link = pmd_link; data->mac_addrs = &pmd->eth_addr; @@ -1195,41 +1229,132 @@ eth_dev_tap_create(struct rte_vdev_device *vdev, char *tap_name, pmd->txq[i].fd = -1; } - tap_kernel_support(pmd); - if (!pmd->flower_support) - return 0; - LIST_INIT(&pmd->flows); + if (fixed_mac_type) { + /* fixed mac = 00:64:74:61:70:<iface_idx> */ + static int iface_idx; + char mac[ETHER_ADDR_LEN] = "\0dtap"; + + mac[ETHER_ADDR_LEN - 1] = iface_idx++; + rte_memcpy(&pmd->eth_addr, mac, ETHER_ADDR_LEN); + } else { + eth_random_addr((uint8_t *)&pmd->eth_addr); + } + + /* Immediately create the netdevice (this will create the 1st queue). */ + if (tap_setup_queue(dev, pmd, 0) == -1) + goto error_exit; + + ifr.ifr_mtu = dev->data->mtu; + if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0) + goto error_exit; + + memset(&ifr, 0, sizeof(struct ifreq)); + ifr.ifr_hwaddr.sa_family = AF_LOCAL; + rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr, ETHER_ADDR_LEN); + if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) + goto error_exit; + /* - * If no netlink socket can be created, then it will fail when - * creating/destroying flow rules. + * Set up everything related to rte_flow: + * - netlink socket + * - tap / remote if_index + * - mandatory QDISCs + * - rte_flow actual/implicit lists + * - implicit rules */ pmd->nlsk_fd = nl_init(0); - if (strlen(remote_iface)) { - struct ifreq ifr; + if (pmd->nlsk_fd == -1) { + RTE_LOG(WARNING, PMD, "%s: failed to create netlink socket.\n", + pmd->name); + goto disable_rte_flow; + } + pmd->if_index = if_nametoindex(pmd->name); + if (!pmd->if_index) { + RTE_LOG(ERR, PMD, "%s: failed to get if_index.\n", pmd->name); + goto disable_rte_flow; + } + if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) { + RTE_LOG(ERR, PMD, "%s: failed to create multiq qdisc.\n", + pmd->name); + goto disable_rte_flow; + } + if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) { + RTE_LOG(ERR, PMD, "%s: failed to create ingress qdisc.\n", + pmd->name); + goto disable_rte_flow; + } + LIST_INIT(&pmd->flows); + if (strlen(remote_iface)) { pmd->remote_if_index = if_nametoindex(remote_iface); - snprintf(pmd->remote_iface, RTE_ETH_NAME_MAX_LEN, - "%s", remote_iface); if (!pmd->remote_if_index) { - RTE_LOG(ERR, PMD, "Could not find %s ifindex: " - "remote interface will remain unconfigured\n", - remote_iface); - return 0; + RTE_LOG(ERR, PMD, "%s: failed to get %s if_index.\n", + pmd->name, remote_iface); + goto error_remote; } + snprintf(pmd->remote_iface, RTE_ETH_NAME_MAX_LEN, + "%s", remote_iface); + + /* Save state of remote device */ + tap_ioctl(pmd, SIOCGIFFLAGS, &pmd->remote_initial_flags, 0, REMOTE_ONLY); + + /* Replicate remote MAC address */ if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) { - RTE_LOG(ERR, PMD, "Could not get remote MAC address\n"); - goto error_exit; + RTE_LOG(ERR, PMD, "%s: failed to get %s MAC address.\n", + pmd->name, pmd->remote_iface); + goto error_remote; } rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data, ETHER_ADDR_LEN); - } else { - eth_random_addr((uint8_t *)&pmd->eth_addr); + /* The desired MAC is already in ifreq after SIOCGIFHWADDR. */ + if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) { + RTE_LOG(ERR, PMD, "%s: failed to get %s MAC address.\n", + pmd->name, remote_iface); + goto error_remote; + } + + /* + * Flush usually returns negative value because it tries to + * delete every QDISC (and on a running device, one QDISC at + * least is needed). Ignore negative return value. + */ + qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index); + if (qdisc_create_ingress(pmd->nlsk_fd, + pmd->remote_if_index) < 0) { + RTE_LOG(ERR, PMD, "%s: failed to create ingress qdisc.\n", + pmd->remote_iface); + goto error_remote; + } + LIST_INIT(&pmd->implicit_flows); + if (tap_flow_implicit_create(pmd, TAP_REMOTE_TX) < 0 || + tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0 || + tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCAST) < 0 || + tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCASTV6) < 0) { + RTE_LOG(ERR, PMD, + "%s: failed to create implicit rules.\n", + pmd->name); + goto error_remote; + } } return 0; +disable_rte_flow: + RTE_LOG(ERR, PMD, " Disabling rte flow support: %s(%d)\n", + strerror(errno), errno); + if (strlen(remote_iface)) { + RTE_LOG(ERR, PMD, "Remote feature requires flow support.\n"); + goto error_exit; + } + return 0; + +error_remote: + RTE_LOG(ERR, PMD, " Can't set up remote feature: %s(%d)\n", + strerror(errno), errno); + tap_flow_implicit_flush(pmd, NULL); + error_exit: - RTE_LOG(DEBUG, PMD, "TAP Unable to initialize %s\n", + RTE_LOG(ERR, PMD, "TAP Unable to initialize %s\n", rte_vdev_device_name(vdev)); rte_free(data); @@ -1275,6 +1400,17 @@ set_remote_iface(const char *key __rte_unused, return 0; } +static int +set_mac_type(const char *key __rte_unused, + const char *value, + void *extra_args) +{ + if (value && + !strncasecmp(ETH_TAP_MAC_FIXED, value, strlen(ETH_TAP_MAC_FIXED))) + *(int *)extra_args = 1; + return 0; +} + /* Open a TAP interface device. */ static int @@ -1286,6 +1422,7 @@ rte_pmd_tap_probe(struct rte_vdev_device *dev) int speed; char tap_name[RTE_ETH_NAME_MAX_LEN]; char remote_iface[RTE_ETH_NAME_MAX_LEN]; + int fixed_mac_type = 0; name = rte_vdev_device_name(dev); params = rte_vdev_device_args(dev); @@ -1296,7 +1433,7 @@ rte_pmd_tap_probe(struct rte_vdev_device *dev) memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN); if (params && (params[0] != '\0')) { - RTE_LOG(DEBUG, PMD, "paramaters (%s)\n", params); + RTE_LOG(DEBUG, PMD, "parameters (%s)\n", params); kvlist = rte_kvargs_parse(params, valid_arguments); if (kvlist) { @@ -1326,6 +1463,15 @@ rte_pmd_tap_probe(struct rte_vdev_device *dev) if (ret == -1) goto leave; } + + if (rte_kvargs_count(kvlist, ETH_TAP_MAC_ARG) == 1) { + ret = rte_kvargs_process(kvlist, + ETH_TAP_MAC_ARG, + &set_mac_type, + &fixed_mac_type); + if (ret == -1) + goto leave; + } } } pmd_link.link_speed = speed; @@ -1333,7 +1479,7 @@ rte_pmd_tap_probe(struct rte_vdev_device *dev) RTE_LOG(NOTICE, PMD, "Initializing pmd_tap for %s as %s\n", name, tap_name); - ret = eth_dev_tap_create(dev, tap_name, remote_iface); + ret = eth_dev_tap_create(dev, tap_name, remote_iface, fixed_mac_type); leave: if (ret == -1) { @@ -1364,7 +1510,7 @@ rte_pmd_tap_remove(struct rte_vdev_device *dev) return 0; internals = eth_dev->data->dev_private; - if (internals->flower_support && internals->nlsk_fd) { + if (internals->nlsk_fd) { tap_flow_flush(eth_dev, NULL); tap_flow_implicit_flush(internals, NULL); nl_final(internals->nlsk_fd); @@ -1391,4 +1537,5 @@ RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap); RTE_PMD_REGISTER_PARAM_STRING(net_tap, ETH_TAP_IFACE_ARG "=<string> " ETH_TAP_SPEED_ARG "=<int> " + ETH_TAP_MAC_ARG "=" ETH_TAP_MAC_FIXED " " ETH_TAP_REMOTE_ARG "=<string>"); |