/* * Copyright (c) 2011, 2013, 2014 Gaetano Catalli. * Copyright (c) 2013, 2014 YAMAMOTO Takashi. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #if !defined(__MACH__) #include #include "netdev-provider.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_NET_IF_MIB_H #include #endif #include #include #include #include #if defined(__NetBSD__) #include #include #endif #include "rtbsd.h" #include "coverage.h" #include "dp-packet.h" #include "dpif-netdev.h" #include "openvswitch/dynamic-string.h" #include "fatal-signal.h" #include "openflow/openflow.h" #include "ovs-thread.h" #include "packets.h" #include "openvswitch/poll-loop.h" #include "openvswitch/shash.h" #include "socket-util.h" #include "svec.h" #include "util.h" #include "openvswitch/vlog.h" VLOG_DEFINE_THIS_MODULE(netdev_bsd); struct netdev_rxq_bsd { struct netdev_rxq up; /* Packet capture descriptor for a system network device. * For a tap device this is NULL. */ pcap_t *pcap_handle; /* Selectable file descriptor for the network device. * This descriptor will be used for polling operations. */ int fd; }; struct netdev_bsd { struct netdev up; /* Never changes after initialization. */ char *kernel_name; /* Protects all members below. */ struct ovs_mutex mutex; unsigned int cache_valid; int ifindex; struct eth_addr etheraddr; int mtu; int carrier; int tap_fd; /* TAP character device, if any, otherwise -1. */ /* Used for sending packets on non-tap devices. */ pcap_t *pcap; int fd; }; enum { VALID_IFINDEX = 1 << 0, VALID_ETHERADDR = 1 << 1, VALID_IN = 1 << 2, VALID_MTU = 1 << 3, VALID_CARRIER = 1 << 4 }; #define PCAP_SNAPLEN 2048 /* * Notifier used to invalidate device informations in case of status change. * * It will be registered with a 'rtbsd_notifier_register()' when the first * device will be created with the call of either 'netdev_bsd_tap_create()' or * 'netdev_bsd_system_create()'. * * The callback associated with this notifier ('netdev_bsd_cache_cb()') will * invalidate cached information about the device. */ static struct rtbsd_notifier netdev_bsd_cache_notifier; static int cache_notifier_refcount; static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); static void destroy_tap(int fd, const char *name); static int get_flags(const struct netdev *, int *flagsp); static int set_flags(const char *, int flags); static int do_set_addr(struct netdev *netdev, unsigned long ioctl_nr, const char *ioctl_name, struct in_addr addr); static int get_etheraddr(const char *netdev_name, struct eth_addr *ea); static int set_etheraddr(const char *netdev_name, int hwaddr_family, int hwaddr_len, const struct eth_addr); static int get_ifindex(const struct netdev *, int *ifindexp); static int ifr_get_flags(const struct ifreq *); static void ifr_set_flags(struct ifreq *, int flags); #ifdef __NetBSD__ static int af_link_ioctl(unsigned long command, const void *arg); #endif static void netdev_bsd_run(const struct netdev_class *); static int netdev_bsd_get_mtu(const struct netdev *netdev_, int *mtup); static bool is_netdev_bsd_class(const struct netdev_class *netdev_class) { return netdev_class->run == netdev_bsd_run; } static struct netdev_bsd * netdev_bsd_cast(const struct netdev *netdev) { ovs_assert(is_netdev_bsd_class(netdev_get_class(netdev))); return CONTAINER_OF(netdev, struct netdev_bsd, up); } static struct netdev_rxq_bsd * netdev_rxq_bsd_cast(const struct netdev_rxq *rxq) { ovs_assert(is_netdev_bsd_class(netdev_get_class(rxq->netdev))); return CONTAINER_OF(rxq, struct netdev_rxq_bsd, up); } static const char * netdev_get_kernel_name(const struct netdev *netdev) { return netdev_bsd_cast(netdev)->kernel_name; } /* * Perform periodic work needed by netdev. In BSD netdevs it checks for any * interface status changes, and eventually calls all the user callbacks. */ static void netdev_bsd_run(const struct netdev_class *netdev_class OVS_UNUSED) { rtbsd_notifier_run(); } /* * Arranges for poll_block() to wake up if the "run" member function needs to * be called. */ static void netdev_bsd_wait(const struct netdev_class *netdev_class OVS_UNUSED) { rtbsd_notifier_wait(); } /* Invalidate cache in case of interface status change. */ static void netdev_bsd_cache_cb(const struct rtbsd_change *change, void *aux OVS_UNUSED) { struct netdev_bsd *dev; if (change) { struct netdev *base_dev = netdev_from_name(change->if_name); if (base_dev) { const struct netdev_class *netdev_class = netdev_get_class(base_dev); if (is_netdev_bsd_class(netdev_class)) { dev = netdev_bsd_cast(base_dev); dev->cache_valid = 0; netdev_change_seq_changed(base_dev); } netdev_close(base_dev); } } else { /* * XXX the API is lacking, we should be able to iterate on the list of * netdevs without having to store the info in a temp shash. */ struct shash device_shash; struct shash_node *node; shash_init(&device_shash); netdev_get_devices(&netdev_bsd_class, &device_shash); SHASH_FOR_EACH (node, &device_shash) { struct netdev *netdev = node->data; dev = netdev_bsd_cast(netdev); dev->cache_valid = 0; netdev_change_seq_changed(netdev); netdev_close(netdev); } shash_destroy(&device_shash); } } static int cache_notifier_ref(void) { int ret = 0; if (!cache_notifier_refcount) { ret = rtbsd_notifier_register(&netdev_bsd_cache_notifier, netdev_bsd_cache_cb, NULL); if (ret) { return ret; } } cache_notifier_refcount++; return 0; } static int cache_notifier_unref(void) { cache_notifier_refcount--; if (cache_notifier_refcount == 0) { rtbsd_notifier_unregister(&netdev_bsd_cache_notifier); } return 0; } static struct netdev * netdev_bsd_alloc(void) { struct netdev_bsd *netdev = xzalloc(sizeof *netdev); return &netdev->up; } static int netdev_bsd_construct_system(struct netdev *netdev_) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); enum netdev_flags flags; int error; error = cache_notifier_ref(); if (error) { return error; } ovs_mutex_init(&netdev->mutex); netdev->tap_fd = -1; netdev->kernel_name = xstrdup(netdev_->name); /* Verify that the netdev really exists by attempting to read its flags */ error = netdev_get_flags(netdev_, &flags); if (error == ENXIO) { free(netdev->kernel_name); cache_notifier_unref(); ovs_mutex_destroy(&netdev->mutex); return error; } return 0; } static int netdev_bsd_construct_tap(struct netdev *netdev_) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); const char *name = netdev_->name; int error = 0; struct ifreq ifr; char *kernel_name = NULL; error = cache_notifier_ref(); if (error) { goto error; } memset(&ifr, 0, sizeof(ifr)); /* Create a tap device by opening /dev/tap. The TAPGIFNAME ioctl is used * to retrieve the name of the tap device. */ ovs_mutex_init(&netdev->mutex); netdev->tap_fd = open("/dev/tap", O_RDWR); if (netdev->tap_fd < 0) { error = errno; VLOG_WARN("opening \"/dev/tap\" failed: %s", ovs_strerror(error)); goto error_unref_notifier; } /* Retrieve tap name (e.g. tap0) */ if (ioctl(netdev->tap_fd, TAPGIFNAME, &ifr) == -1) { /* XXX Need to destroy the device? */ error = errno; close(netdev->tap_fd); goto error_unref_notifier; } /* Change the name of the tap device */ #if defined(SIOCSIFNAME) ifr.ifr_data = (void *)name; error = af_inet_ioctl(SIOCSIFNAME, &ifr); if (error) { destroy_tap(netdev->tap_fd, ifr.ifr_name); goto error_unref_notifier; } kernel_name = xstrdup(name); #else /* * NetBSD doesn't support inteface renaming. */ VLOG_INFO("tap %s is created for bridge %s", ifr.ifr_name, name); kernel_name = xstrdup(ifr.ifr_name); #endif /* set non-blocking. */ error = set_nonblocking(netdev->tap_fd); if (error) { destroy_tap(netdev->tap_fd, kernel_name); goto error_unref_notifier; } /* Turn device UP */ ifr_set_flags(&ifr, IFF_UP); ovs_strlcpy(ifr.ifr_name, kernel_name, sizeof ifr.ifr_name); error = af_inet_ioctl(SIOCSIFFLAGS, &ifr); if (error) { destroy_tap(netdev->tap_fd, kernel_name); goto error_unref_notifier; } netdev->kernel_name = kernel_name; return 0; error_unref_notifier: ovs_mutex_destroy(&netdev->mutex); cache_notifier_unref(); error: free(kernel_name); return error; } static void netdev_bsd_destruct(struct netdev *netdev_) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); cache_notifier_unref(); if (netdev->tap_fd >= 0) { destroy_tap(netdev->tap_fd, netdev_get_kernel_name(netdev_)); } if (netdev->pcap) { pcap_close(netdev->pcap); } free(netdev->kernel_name); ovs_mutex_destroy(&netdev->mutex); } static void netdev_bsd_dealloc(struct netdev *netdev_) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); free(netdev); } static int netdev_bsd_open_pcap(const char *name, pcap_t **pcapp, int *fdp) { char errbuf[PCAP_ERRBUF_SIZE]; pcap_t *pcap = NULL; int one = 1; int error; int fd; /* Open the pcap device. The device is opened in non-promiscuous mode * because the interface flags are manually set by the caller. */ errbuf[0] = '\0'; pcap = pcap_open_live(name, PCAP_SNAPLEN, 0, 1000, errbuf); if (!pcap) { VLOG_ERR_RL(&rl, "%s: pcap_open_live failed: %s", name, errbuf); error = EIO; goto error; } if (errbuf[0] != '\0') { VLOG_WARN_RL(&rl, "%s: pcap_open_live: %s", name, errbuf); } /* Get the underlying fd. */ fd = pcap_get_selectable_fd(pcap); if (fd == -1) { VLOG_WARN_RL(&rl, "%s: no selectable file descriptor", name); error = errno; goto error; } /* Set non-blocking mode. Also the BIOCIMMEDIATE ioctl must be called * on the file descriptor returned by pcap_get_selectable_fd to achieve * a real non-blocking behaviour.*/ error = pcap_setnonblock(pcap, 1, errbuf); if (error == -1) { error = errno; goto error; } /* This call assure that reads return immediately upon packet * reception. Otherwise, a read will block until either the kernel * buffer becomes full or a timeout occurs. */ if (ioctl(fd, BIOCIMMEDIATE, &one) < 0 ) { VLOG_ERR_RL(&rl, "ioctl(BIOCIMMEDIATE) on %s device failed: %s", name, ovs_strerror(errno)); error = errno; goto error; } /* Capture only incoming packets. */ error = pcap_setdirection(pcap, PCAP_D_IN); if (error == -1) { error = errno; goto error; } *pcapp = pcap; *fdp = fd; return 0; error: if (pcap) { pcap_close(pcap); } *pcapp = NULL; *fdp = -1; return error; } static struct netdev_rxq * netdev_bsd_rxq_alloc(void) { struct netdev_rxq_bsd *rxq = xzalloc(sizeof *rxq); return &rxq->up; } static int netdev_bsd_rxq_construct(struct netdev_rxq *rxq_) { struct netdev_rxq_bsd *rxq = netdev_rxq_bsd_cast(rxq_); struct netdev *netdev_ = rxq->up.netdev; struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); int error; if (!strcmp(netdev_get_type(netdev_), "tap")) { rxq->pcap_handle = NULL; rxq->fd = netdev->tap_fd; error = 0; } else { ovs_mutex_lock(&netdev->mutex); error = netdev_bsd_open_pcap(netdev_get_kernel_name(netdev_), &rxq->pcap_handle, &rxq->fd); ovs_mutex_unlock(&netdev->mutex); } return error; } static void netdev_bsd_rxq_destruct(struct netdev_rxq *rxq_) { struct netdev_rxq_bsd *rxq = netdev_rxq_bsd_cast(rxq_); if (rxq->pcap_handle) { pcap_close(rxq->pcap_handle); } } static void netdev_bsd_rxq_dealloc(struct netdev_rxq *rxq_) { struct netdev_rxq_bsd *rxq = netdev_rxq_bsd_cast(rxq_); free(rxq); } /* The recv callback of the netdev class returns the number of bytes of the * received packet. * * This can be done by the pcap_next() function. Unfortunately pcap_next() does * not make difference between a missing packet on the capture interface and * an error during the file capture. We can use the pcap_dispatch() function * instead, which is able to distinguish between errors and null packet. * * To make pcap_dispatch() returns the number of bytes read from the interface * we need to define the following callback and argument. */ struct pcap_arg { void *data; int size; int retval; }; /* * This callback will be executed on every captured packet. * * If the packet captured by pcap_dispatch() does not fit the pcap buffer, * pcap returns a truncated packet and we follow this behavior. * * The argument args->retval is the packet size in bytes. */ static void proc_pkt(u_char *args_, const struct pcap_pkthdr *hdr, const u_char *packet) { struct pcap_arg *args = ALIGNED_CAST(struct pcap_arg *, args_); if (args->size < hdr->len) { VLOG_WARN_RL(&rl, "packet truncated"); args->retval = args->size; } else { args->retval = hdr->len; } /* copy the packet to our buffer */ memcpy(args->data, packet, args->retval); } /* * This function attempts to receive a packet from the specified network * device. It is assumed that the network device is a system device or a tap * device opened as a system one. In this case the read operation is performed * from rxq->pcap. */ static int netdev_rxq_bsd_recv_pcap(struct netdev_rxq_bsd *rxq, struct dp_packet *buffer) { struct pcap_arg arg; int ret; /* prepare the pcap argument to store the packet */ arg.size = dp_packet_tailroom(buffer); arg.data = dp_packet_data(buffer); for (;;) { ret = pcap_dispatch(rxq->pcap_handle, 1, proc_pkt, (u_char *) &arg); if (ret > 0) { dp_packet_set_size(buffer, dp_packet_size(buffer) + arg.retval); return 0; } if (ret == -1) { if (errno == EINTR) { continue; } } return EAGAIN; } } /* * This function attempts to receive a packet from the specified network * device. It is assumed that the network device is a tap device and * 'rxq->fd' is initialized with the tap file descriptor. */ static int netdev_rxq_bsd_recv_tap(struct netdev_rxq_bsd *rxq, struct dp_packet *buffer) { size_t size = dp_packet_tailroom(buffer); for (;;) { ssize_t retval = read(rxq->fd, dp_packet_data(buffer), size); if (retval >= 0) { dp_packet_set_size(buffer, dp_packet_size(buffer) + retval); return 0; } else if (errno != EINTR) { if (errno != EAGAIN) { VLOG_WARN_RL(&rl, "error receiving Ethernet packet on %s: %s", ovs_strerror(errno), netdev_rxq_get_name(&rxq->up)); } return errno; } } } static int netdev_bsd_rxq_recv(struct netdev_rxq *rxq_, struct dp_packet_batch *batch, int *qfill) { struct netdev_rxq_bsd *rxq = netdev_rxq_bsd_cast(rxq_); struct netdev *netdev = rxq->up.netdev; struct dp_packet *packet; ssize_t retval; int mtu; if (netdev_bsd_get_mtu(netdev, &mtu)) { mtu = ETH_PAYLOAD_MAX; } /* Assume Ethernet port. No need to set packet_type. */ packet = dp_packet_new_with_headroom(VLAN_ETH_HEADER_LEN + mtu, DP_NETDEV_HEADROOM); retval = (rxq->pcap_handle ? netdev_rxq_bsd_recv_pcap(rxq, packet) : netdev_rxq_bsd_recv_tap(rxq, packet)); if (retval) { dp_packet_delete(packet); } else { dp_packet_batch_init_packet(batch, packet); } if (qfill) { *qfill = -ENOTSUP; } return retval; } /* * Registers with the poll loop to wake up from the next call to poll_block() * when a packet is ready to be received with netdev_rxq_recv() on 'rxq'. */ static void netdev_bsd_rxq_wait(struct netdev_rxq *rxq_) { struct netdev_rxq_bsd *rxq = netdev_rxq_bsd_cast(rxq_); poll_fd_wait(rxq->fd, POLLIN); } /* Discards all packets waiting to be received from 'rxq'. */ static int netdev_bsd_rxq_drain(struct netdev_rxq *rxq_) { struct ifreq ifr; struct netdev_rxq_bsd *rxq = netdev_rxq_bsd_cast(rxq_); strcpy(ifr.ifr_name, netdev_get_kernel_name(netdev_rxq_get_netdev(rxq_))); if (ioctl(rxq->fd, BIOCFLUSH, &ifr) == -1) { VLOG_DBG_RL(&rl, "%s: ioctl(BIOCFLUSH) failed: %s", netdev_rxq_get_name(rxq_), ovs_strerror(errno)); return errno; } return 0; } /* * Send a packet on the specified network device. The device could be either a * system or a tap device. */ static int netdev_bsd_send(struct netdev *netdev_, int qid OVS_UNUSED, struct dp_packet_batch *batch, bool concurrent_txq OVS_UNUSED) { struct netdev_bsd *dev = netdev_bsd_cast(netdev_); const char *name = netdev_get_name(netdev_); struct dp_packet *packet; int error; ovs_mutex_lock(&dev->mutex); if (dev->tap_fd < 0 && !dev->pcap) { error = netdev_bsd_open_pcap(name, &dev->pcap, &dev->fd); } else { error = 0; } DP_PACKET_BATCH_FOR_EACH (i, packet, batch) { const void *data = dp_packet_data(packet); size_t size = dp_packet_size(packet); while (!error) { ssize_t retval; if (dev->tap_fd >= 0) { retval = write(dev->tap_fd, data, size); } else { retval = pcap_inject(dev->pcap, data, size); } if (retval < 0) { if (errno == EINTR) { continue; } else { error = errno; if (error != EAGAIN) { VLOG_WARN_RL(&rl, "error sending Ethernet packet on" " %s: %s", name, ovs_strerror(error)); } } } else if (retval != size) { VLOG_WARN_RL(&rl, "sent partial Ethernet packet " "(%"PRIuSIZE" bytes of " "%"PRIuSIZE") on %s", retval, size, name); error = EMSGSIZE; } else { break; } } } ovs_mutex_unlock(&dev->mutex); dp_packet_delete_batch(batch, true); return error; } /* * Registers with the poll loop to wake up from the next call to poll_block() * when the packet transmission queue has sufficient room to transmit a packet * with netdev_send(). */ static void netdev_bsd_send_wait(struct netdev *netdev_, int qid OVS_UNUSED) { struct netdev_bsd *dev = netdev_bsd_cast(netdev_); ovs_mutex_lock(&dev->mutex); if (dev->tap_fd >= 0) { /* TAP device always accepts packets. */ poll_immediate_wake(); } else if (dev->pcap) { poll_fd_wait(dev->fd, POLLOUT); } else { /* We haven't even tried to send a packet yet. */ poll_immediate_wake(); } ovs_mutex_unlock(&dev->mutex); } /* * Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful, * otherwise a positive errno value. */ static int netdev_bsd_set_etheraddr(struct netdev *netdev_, const struct eth_addr mac) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); int error = 0; ovs_mutex_lock(&netdev->mutex); if (!(netdev->cache_valid & VALID_ETHERADDR) || !eth_addr_equals(netdev->etheraddr, mac)) { error = set_etheraddr(netdev_get_kernel_name(netdev_), AF_LINK, ETH_ADDR_LEN, mac); if (!error) { netdev->cache_valid |= VALID_ETHERADDR; netdev->etheraddr = mac; netdev_change_seq_changed(netdev_); } } ovs_mutex_unlock(&netdev->mutex); return error; } /* * Returns a pointer to 'netdev''s MAC address. The caller must not modify or * free the returned buffer. */ static int netdev_bsd_get_etheraddr(const struct netdev *netdev_, struct eth_addr *mac) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); int error = 0; ovs_mutex_lock(&netdev->mutex); if (!(netdev->cache_valid & VALID_ETHERADDR)) { error = get_etheraddr(netdev_get_kernel_name(netdev_), &netdev->etheraddr); if (!error) { netdev->cache_valid |= VALID_ETHERADDR; } } if (!error) { *mac = netdev->etheraddr; } ovs_mutex_unlock(&netdev->mutex); return error; } /* * Returns the maximum size of transmitted (and received) packets on 'netdev', * in bytes, not including the hardware header; thus, this is typically 1500 * bytes for Ethernet devices. */ static int netdev_bsd_get_mtu(const struct netdev *netdev_, int *mtup) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); int error = 0; ovs_mutex_lock(&netdev->mutex); if (!(netdev->cache_valid & VALID_MTU)) { struct ifreq ifr; error = af_inet_ifreq_ioctl(netdev_get_kernel_name(netdev_), &ifr, SIOCGIFMTU, "SIOCGIFMTU"); if (!error) { netdev->mtu = ifr.ifr_mtu; netdev->cache_valid |= VALID_MTU; } } if (!error) { *mtup = netdev->mtu; } ovs_mutex_unlock(&netdev->mutex); return error; } static int netdev_bsd_get_ifindex(const struct netdev *netdev_) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); int ifindex, error; ovs_mutex_lock(&netdev->mutex); error = get_ifindex(netdev_, &ifindex); ovs_mutex_unlock(&netdev->mutex); return error ? -error : ifindex; } static int netdev_bsd_get_carrier(const struct netdev *netdev_, bool *carrier) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); int error = 0; ovs_mutex_lock(&netdev->mutex); if (!(netdev->cache_valid & VALID_CARRIER)) { struct ifmediareq ifmr; memset(&ifmr, 0, sizeof(ifmr)); ovs_strlcpy(ifmr.ifm_name, netdev_get_kernel_name(netdev_), sizeof ifmr.ifm_name); error = af_inet_ioctl(SIOCGIFMEDIA, &ifmr); if (!error) { netdev->carrier = (ifmr.ifm_status & IFM_ACTIVE) == IFM_ACTIVE; netdev->cache_valid |= VALID_CARRIER; /* If the interface doesn't report whether the media is active, * just assume it is active. */ if ((ifmr.ifm_status & IFM_AVALID) == 0) { netdev->carrier = true; } } else { VLOG_DBG_RL(&rl, "%s: ioctl(SIOCGIFMEDIA) failed: %s", netdev_get_name(netdev_), ovs_strerror(error)); } } if (!error) { *carrier = netdev->carrier; } ovs_mutex_unlock(&netdev->mutex); return error; } static void convert_stats_system(struct netdev_stats *stats, const struct if_data *ifd) { /* * note: UINT64_MAX means unsupported */ stats->rx_packets = ifd->ifi_ipackets; stats->tx_packets = ifd->ifi_opackets; stats->rx_bytes = ifd->ifi_obytes; stats->tx_bytes = ifd->ifi_ibytes; stats->rx_errors = ifd->ifi_ierrors; stats->tx_errors = ifd->ifi_oerrors; stats->rx_dropped = ifd->ifi_iqdrops; stats->tx_dropped = UINT64_MAX; stats->multicast = ifd->ifi_imcasts; stats->collisions = ifd->ifi_collisions; stats->rx_length_errors = UINT64_MAX; stats->rx_over_errors = UINT64_MAX; stats->rx_crc_errors = UINT64_MAX; stats->rx_frame_errors = UINT64_MAX; stats->rx_fifo_errors = UINT64_MAX; stats->rx_missed_errors = UINT64_MAX; stats->tx_aborted_errors = UINT64_MAX; stats->tx_carrier_errors = UINT64_MAX; stats->tx_fifo_errors = UINT64_MAX; stats->tx_heartbeat_errors = UINT64_MAX; stats->tx_window_errors = UINT64_MAX; } static void convert_stats_tap(struct netdev_stats *stats, const struct if_data *ifd) { /* * Similar to convert_stats_system but swapping rxq and tx * because 'ifd' is stats for the network interface side of the * tap device and what the caller wants is one for the character * device side. * * note: UINT64_MAX means unsupported */ stats->rx_packets = ifd->ifi_opackets; stats->tx_packets = ifd->ifi_ipackets; stats->rx_bytes = ifd->ifi_ibytes; stats->tx_bytes = ifd->ifi_obytes; stats->rx_errors = ifd->ifi_oerrors; stats->tx_errors = ifd->ifi_ierrors; stats->rx_dropped = UINT64_MAX; stats->tx_dropped = ifd->ifi_iqdrops; stats->multicast = ifd->ifi_omcasts; stats->collisions = UINT64_MAX; stats->rx_length_errors = UINT64_MAX; stats->rx_over_errors = UINT64_MAX; stats->rx_crc_errors = UINT64_MAX; stats->rx_frame_errors = UINT64_MAX; stats->rx_fifo_errors = UINT64_MAX; stats->rx_missed_errors = UINT64_MAX; stats->tx_aborted_errors = UINT64_MAX; stats->tx_carrier_errors = UINT64_MAX; stats->tx_fifo_errors = UINT64_MAX; stats->tx_heartbeat_errors = UINT64_MAX; stats->tx_window_errors = UINT64_MAX; } static void convert_stats(const struct netdev *netdev, struct netdev_stats *stats, const struct if_data *ifd) { if (netdev_bsd_cast(netdev)->tap_fd == -1) { convert_stats_system(stats, ifd); } else { convert_stats_tap(stats, ifd); } } /* Retrieves current device stats for 'netdev'. */ static int netdev_bsd_get_stats(const struct netdev *netdev_, struct netdev_stats *stats) { #if defined(__FreeBSD__) int if_count, i; int mib[6]; size_t len; struct ifmibdata ifmd; mib[0] = CTL_NET; mib[1] = PF_LINK; mib[2] = NETLINK_GENERIC; mib[3] = IFMIB_SYSTEM; mib[4] = IFMIB_IFCOUNT; len = sizeof(if_count); if (sysctl(mib, 5, &if_count, &len, (void *)0, 0) == -1) { VLOG_DBG_RL(&rl, "%s: sysctl failed: %s", netdev_get_name(netdev_), ovs_strerror(errno)); return errno; } mib[5] = IFDATA_GENERAL; mib[3] = IFMIB_IFDATA; len = sizeof(ifmd); for (i = 1; i <= if_count; i++) { mib[4] = i; /* row */ if (sysctl(mib, 6, &ifmd, &len, (void *)0, 0) == -1) { VLOG_DBG_RL(&rl, "%s: sysctl failed: %s", netdev_get_name(netdev_), ovs_strerror(errno)); return errno; } else if (!strcmp(ifmd.ifmd_name, netdev_get_name(netdev_))) { convert_stats(netdev_, stats, &ifmd.ifmd_data); break; } } return 0; #elif defined(__NetBSD__) struct ifdatareq ifdr; int error; memset(&ifdr, 0, sizeof(ifdr)); ovs_strlcpy(ifdr.ifdr_name, netdev_get_kernel_name(netdev_), sizeof(ifdr.ifdr_name)); error = af_link_ioctl(SIOCGIFDATA, &ifdr); if (!error) { convert_stats(netdev_, stats, &ifdr.ifdr_data); } return error; #else #error not implemented #endif } static uint32_t netdev_bsd_parse_media(int media) { uint32_t supported = 0; bool half_duplex = media & IFM_HDX ? true : false; switch (IFM_SUBTYPE(media)) { case IFM_10_2: case IFM_10_5: case IFM_10_STP: case IFM_10_T: supported |= half_duplex ? NETDEV_F_10MB_HD : NETDEV_F_10MB_FD; supported |= NETDEV_F_COPPER; break; case IFM_10_FL: supported |= half_duplex ? NETDEV_F_10MB_HD : NETDEV_F_10MB_FD; supported |= NETDEV_F_FIBER; break; case IFM_100_T2: case IFM_100_T4: case IFM_100_TX: case IFM_100_VG: supported |= half_duplex ? NETDEV_F_100MB_HD : NETDEV_F_100MB_FD; supported |= NETDEV_F_COPPER; break; case IFM_100_FX: supported |= half_duplex ? NETDEV_F_100MB_HD : NETDEV_F_100MB_FD; supported |= NETDEV_F_FIBER; break; case IFM_1000_CX: case IFM_1000_T: supported |= half_duplex ? NETDEV_F_1GB_HD : NETDEV_F_1GB_FD; supported |= NETDEV_F_COPPER; break; case IFM_1000_LX: case IFM_1000_SX: supported |= half_duplex ? NETDEV_F_1GB_HD : NETDEV_F_1GB_FD; supported |= NETDEV_F_FIBER; break; case IFM_10G_CX4: supported |= NETDEV_F_10GB_FD; supported |= NETDEV_F_COPPER; break; case IFM_10G_LR: case IFM_10G_SR: supported |= NETDEV_F_10GB_FD; supported |= NETDEV_F_FIBER; break; default: return 0; } if (IFM_SUBTYPE(media) == IFM_AUTO) { supported |= NETDEV_F_AUTONEG; } /* if (media & IFM_ETH_FMASK) { supported |= NETDEV_F_PAUSE; } */ return supported; } /* * Stores the features supported by 'netdev' into each of '*current', * '*advertised', '*supported', and '*peer' that are non-null. Each value is a * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if * successful, otherwise a positive errno value. On failure, all of the * passed-in values are set to 0. */ static int netdev_bsd_get_features(const struct netdev *netdev, enum netdev_features *current, uint32_t *advertised, enum netdev_features *supported, uint32_t *peer) { struct ifmediareq ifmr; int *media_list; int i; int error; /* XXX Look into SIOCGIFCAP instead of SIOCGIFMEDIA */ memset(&ifmr, 0, sizeof(ifmr)); ovs_strlcpy(ifmr.ifm_name, netdev_get_name(netdev), sizeof ifmr.ifm_name); /* We make two SIOCGIFMEDIA ioctl calls. The first to determine the * number of supported modes, and a second with a buffer to retrieve * them. */ error = af_inet_ioctl(SIOCGIFMEDIA, &ifmr); if (error) { VLOG_DBG_RL(&rl, "%s: ioctl(SIOCGIFMEDIA) failed: %s", netdev_get_name(netdev), ovs_strerror(error)); return error; } media_list = xcalloc(ifmr.ifm_count, sizeof(int)); ifmr.ifm_ulist = media_list; if (IFM_TYPE(ifmr.ifm_current) != IFM_ETHER) { VLOG_DBG_RL(&rl, "%s: doesn't appear to be ethernet", netdev_get_name(netdev)); error = EINVAL; goto cleanup; } error = af_inet_ioctl(SIOCGIFMEDIA, &ifmr); if (error) { VLOG_DBG_RL(&rl, "%s: ioctl(SIOCGIFMEDIA) failed: %s", netdev_get_name(netdev), ovs_strerror(error)); goto cleanup; } /* Current settings. */ *current = netdev_bsd_parse_media(ifmr.ifm_active); /* Advertised features. */ *advertised = netdev_bsd_parse_media(ifmr.ifm_current); /* Supported features. */ *supported = 0; for (i = 0; i < ifmr.ifm_count; i++) { *supported |= netdev_bsd_parse_media(ifmr.ifm_ulist[i]); } /* Peer advertisements. */ *peer = 0; /* XXX */ error = 0; cleanup: free(media_list); return error; } /* * Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a * positive errno value. */ static int netdev_bsd_set_in4(struct netdev *netdev_, struct in_addr addr, struct in_addr mask) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); int error; ovs_mutex_lock(&netdev->mutex); error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", addr); if (!error) { if (addr.s_addr != INADDR_ANY) { error = do_set_addr(netdev_, SIOCSIFNETMASK, "SIOCSIFNETMASK", mask); } netdev_change_seq_changed(netdev_); } ovs_mutex_unlock(&netdev->mutex); return error; } static int netdev_bsd_get_addr_list(const struct netdev *netdev_, struct in6_addr **addr, struct in6_addr **mask, int *n_cnt) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); int error; if (!(netdev->cache_valid & VALID_IN)) { netdev_get_addrs_list_flush(); } error = netdev_get_addrs(netdev_get_name(netdev_), addr, mask, n_cnt); if (!error) { netdev->cache_valid |= VALID_IN; } return error; } #if defined(__NetBSD__) static char * netdev_bsd_kernel_name_to_ovs_name(const char *kernel_name) { char *ovs_name = NULL; struct shash device_shash; struct shash_node *node; shash_init(&device_shash); netdev_get_devices(&netdev_tap_class, &device_shash); SHASH_FOR_EACH(node, &device_shash) { struct netdev *netdev = node->data; struct netdev_bsd * const dev = netdev_bsd_cast(netdev); if (!strcmp(dev->kernel_name, kernel_name)) { free(ovs_name); ovs_name = xstrdup(netdev_get_name(&dev->up)); } netdev_close(netdev); } shash_destroy(&device_shash); return ovs_name ? ovs_name : xstrdup(kernel_name); } #endif static int netdev_bsd_get_next_hop(const struct in_addr *host OVS_UNUSED, struct in_addr *next_hop OVS_UNUSED, char **netdev_name OVS_UNUSED) { #if defined(__NetBSD__) static int seq = 0; struct sockaddr_in sin; struct sockaddr_dl sdl; int s; int i; struct { struct rt_msghdr h; char space[512]; } buf; struct rt_msghdr *rtm = &buf.h; const pid_t pid = getpid(); char *cp; ssize_t ssz; bool gateway = false; char *ifname = NULL; int saved_errno; memset(next_hop, 0, sizeof(*next_hop)); *netdev_name = NULL; memset(&sin, 0, sizeof(sin)); sin.sin_len = sizeof(sin); sin.sin_family = AF_INET; sin.sin_port = 0; sin.sin_addr = *host; memset(&sdl, 0, sizeof(sdl)); sdl.sdl_len = sizeof(sdl); sdl.sdl_family = AF_LINK; s = socket(PF_ROUTE, SOCK_RAW, 0); memset(&buf, 0, sizeof(buf)); rtm->rtm_flags = RTF_HOST|RTF_UP; rtm->rtm_version = RTM_VERSION; rtm->rtm_addrs = RTA_DST|RTA_IFP; cp = (void *)&buf.space; memcpy(cp, &sin, sizeof(sin)); RT_ADVANCE(cp, (struct sockaddr *)(void *)&sin); memcpy(cp, &sdl, sizeof(sdl)); RT_ADVANCE(cp, (struct sockaddr *)(void *)&sdl); rtm->rtm_msglen = cp - (char *)(void *)rtm; rtm->rtm_seq = ++seq; rtm->rtm_type = RTM_GET; rtm->rtm_pid = pid; write(s, rtm, rtm->rtm_msglen); memset(&buf, 0, sizeof(buf)); do { ssz = read(s, &buf, sizeof(buf)); } while (ssz > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); saved_errno = errno; close(s); if (ssz <= 0) { if (ssz < 0) { return saved_errno; } return EPIPE; /* XXX */ } cp = (void *)&buf.space; for (i = 1; i; i <<= 1) { if ((rtm->rtm_addrs & i) != 0) { const struct sockaddr *sa = (const void *)cp; if ((i == RTA_GATEWAY) && sa->sa_family == AF_INET) { const struct sockaddr_in * const sin = ALIGNED_CAST(const struct sockaddr_in *, sa); *next_hop = sin->sin_addr; gateway = true; } if ((i == RTA_IFP) && sa->sa_family == AF_LINK) { const struct sockaddr_dl * const sdl = ALIGNED_CAST(const struct sockaddr_dl *, sa); char *kernel_name; kernel_name = xmemdup0(sdl->sdl_data, sdl->sdl_nlen); ifname = netdev_bsd_kernel_name_to_ovs_name(kernel_name); free(kernel_name); } RT_ADVANCE(cp, sa); } } if (ifname == NULL) { return ENXIO; } if (!gateway) { *next_hop = *host; } *netdev_name = ifname; VLOG_DBG("host " IP_FMT " next-hop " IP_FMT " if %s", IP_ARGS(host->s_addr), IP_ARGS(next_hop->s_addr), *netdev_name); return 0; #else return EOPNOTSUPP; #endif } static int netdev_bsd_arp_lookup(const struct netdev *netdev OVS_UNUSED, ovs_be32 ip OVS_UNUSED, struct eth_addr *mac OVS_UNUSED) { #if defined(__NetBSD__) const struct rt_msghdr *rtm; size_t needed; char *buf; const char *cp; const char *ep; int mib[6]; int error; buf = NULL; mib[0] = CTL_NET; mib[1] = PF_ROUTE; mib[2] = 0; mib[3] = AF_INET; mib[4] = NET_RT_FLAGS; #ifdef RTF_LLINFO mib[5] = RTF_LLINFO; #else mib[5] = 0; #endif if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1) { error = errno; goto error; } buf = xmalloc(needed); if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1) { error = errno; goto error; } ep = buf + needed; for (cp = buf; cp < ep; cp += rtm->rtm_msglen) { const struct sockaddr_inarp *sina; const struct sockaddr_dl *sdl; rtm = (const void *)cp; sina = (const void *)(rtm + 1); if (ip != sina->sin_addr.s_addr) { continue; } sdl = (const void *) ((const char *)(const void *)sina + RT_ROUNDUP(sina->sin_len)); if (sdl->sdl_alen == ETH_ADDR_LEN) { memcpy(mac, &sdl->sdl_data[sdl->sdl_nlen], ETH_ADDR_LEN); error = 0; goto error; } } error = ENXIO; error: free(buf); return error; #else return EOPNOTSUPP; #endif } static void make_in4_sockaddr(struct sockaddr *sa, struct in_addr addr) { struct sockaddr_in sin; memset(&sin, 0, sizeof sin); sin.sin_family = AF_INET; sin.sin_addr = addr; sin.sin_port = 0; memset(sa, 0, sizeof *sa); memcpy(sa, &sin, sizeof sin); } static int do_set_addr(struct netdev *netdev, unsigned long ioctl_nr, const char *ioctl_name, struct in_addr addr) { struct ifreq ifr; make_in4_sockaddr(&ifr.ifr_addr, addr); return af_inet_ifreq_ioctl(netdev_get_kernel_name(netdev), &ifr, ioctl_nr, ioctl_name); } static int nd_to_iff_flags(enum netdev_flags nd) { int iff = 0; if (nd & NETDEV_UP) { iff |= IFF_UP; } if (nd & NETDEV_PROMISC) { iff |= IFF_PROMISC; #if defined(IFF_PPROMISC) iff |= IFF_PPROMISC; #endif } if (nd & NETDEV_LOOPBACK) { iff |= IFF_LOOPBACK; } return iff; } static int iff_to_nd_flags(int iff) { enum netdev_flags nd = 0; if (iff & IFF_UP) { nd |= NETDEV_UP; } if (iff & IFF_PROMISC) { nd |= NETDEV_PROMISC; } if (iff & IFF_LOOPBACK) { nd |= NETDEV_LOOPBACK; } return nd; } static int netdev_bsd_update_flags(struct netdev *netdev_, enum netdev_flags off, enum netdev_flags on, enum netdev_flags *old_flagsp) { int old_flags, new_flags; int error; error = get_flags(netdev_, &old_flags); if (!error) { *old_flagsp = iff_to_nd_flags(old_flags); new_flags = (old_flags & ~nd_to_iff_flags(off)) | nd_to_iff_flags(on); if (new_flags != old_flags) { error = set_flags(netdev_get_kernel_name(netdev_), new_flags); netdev_change_seq_changed(netdev_); } } return error; } #define NETDEV_BSD_CLASS_COMMON \ .run = netdev_bsd_run, \ .wait = netdev_bsd_wait, \ .alloc = netdev_bsd_alloc, \ .destruct = netdev_bsd_destruct, \ .dealloc = netdev_bsd_dealloc, \ .send = netdev_bsd_send, \ .send_wait = netdev_bsd_send_wait, \ .set_etheraddr = netdev_bsd_set_etheraddr, \ .get_etheraddr = netdev_bsd_get_etheraddr, \ .get_mtu = netdev_bsd_get_mtu, \ .get_ifindex = netdev_bsd_get_ifindex, \ .get_carrier = netdev_bsd_get_carrier, \ .get_stats = netdev_bsd_get_stats, \ .get_features = netdev_bsd_get_features, \ .set_in4 = netdev_bsd_set_in4, \ .get_addr_list = netdev_bsd_get_addr_list, \ .get_next_hop = netdev_bsd_get_next_hop, \ .arp_lookup = netdev_bsd_arp_lookup, \ .update_flags = netdev_bsd_update_flags, \ .rxq_alloc = netdev_bsd_rxq_alloc, \ .rxq_construct = netdev_bsd_rxq_construct, \ .rxq_destruct = netdev_bsd_rxq_destruct, \ .rxq_dealloc = netdev_bsd_rxq_dealloc, \ .rxq_recv = netdev_bsd_rxq_recv, \ .rxq_wait = netdev_bsd_rxq_wait, \ .rxq_drain = netdev_bsd_rxq_drain const struct netdev_class netdev_bsd_class = { NETDEV_BSD_CLASS_COMMON, .type = "system", .construct = netdev_bsd_construct_system, }; const struct netdev_class netdev_tap_class = { NETDEV_BSD_CLASS_COMMON, .type = "tap", .construct = netdev_bsd_construct_tap, }; static void destroy_tap(int fd, const char *name) { struct ifreq ifr; close(fd); strcpy(ifr.ifr_name, name); /* XXX What to do if this call fails? */ af_inet_ioctl(SIOCIFDESTROY, &ifr); } static int get_flags(const struct netdev *netdev, int *flags) { struct ifreq ifr; int error; error = af_inet_ifreq_ioctl(netdev_get_kernel_name(netdev), &ifr, SIOCGIFFLAGS, "SIOCGIFFLAGS"); *flags = ifr_get_flags(&ifr); return error; } static int set_flags(const char *name, int flags) { struct ifreq ifr; ifr_set_flags(&ifr, flags); return af_inet_ifreq_ioctl(name, &ifr, SIOCSIFFLAGS, "SIOCSIFFLAGS"); } static int get_ifindex(const struct netdev *netdev_, int *ifindexp) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); *ifindexp = 0; if (!(netdev->cache_valid & VALID_IFINDEX)) { int ifindex = if_nametoindex(netdev_get_name(netdev_)); if (ifindex <= 0) { return errno; } netdev->cache_valid |= VALID_IFINDEX; netdev->ifindex = ifindex; } *ifindexp = netdev->ifindex; return 0; } static int get_etheraddr(const char *netdev_name, struct eth_addr *ea) { struct ifaddrs *head; struct ifaddrs *ifa; struct sockaddr_dl *sdl; if (getifaddrs(&head) != 0) { VLOG_ERR("getifaddrs on %s device failed: %s", netdev_name, ovs_strerror(errno)); return errno; } for (ifa = head; ifa; ifa = ifa->ifa_next) { if (ifa->ifa_addr->sa_family == AF_LINK) { if (!strcmp(ifa->ifa_name, netdev_name)) { sdl = ALIGNED_CAST(struct sockaddr_dl *, ifa->ifa_addr); if (sdl) { memcpy(ea, LLADDR(sdl), sdl->sdl_alen); freeifaddrs(head); return 0; } } } } VLOG_ERR("could not find ethernet address for %s device", netdev_name); freeifaddrs(head); return ENODEV; } static int set_etheraddr(const char *netdev_name OVS_UNUSED, int hwaddr_family OVS_UNUSED, int hwaddr_len OVS_UNUSED, const struct eth_addr mac OVS_UNUSED) { #if defined(__FreeBSD__) struct ifreq ifr; int error; memset(&ifr, 0, sizeof ifr); ovs_strlcpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name); ifr.ifr_addr.sa_family = hwaddr_family; ifr.ifr_addr.sa_len = hwaddr_len; memcpy(ifr.ifr_addr.sa_data, &mac, hwaddr_len); error = af_inet_ioctl(SIOCSIFLLADDR, &ifr); if (error) { VLOG_ERR("ioctl(SIOCSIFLLADDR) on %s device failed: %s", netdev_name, ovs_strerror(error)); return error; } return 0; #elif defined(__NetBSD__) struct if_laddrreq req; struct sockaddr_dl *sdl; struct sockaddr_storage oldaddr; int error; /* * get the old address, add new one, and then remove old one. */ if (hwaddr_len != ETH_ADDR_LEN) { /* just to be safe about sockaddr storage size */ return EOPNOTSUPP; } memset(&req, 0, sizeof(req)); ovs_strlcpy(req.iflr_name, netdev_name, sizeof(req.iflr_name)); req.addr.ss_len = sizeof(req.addr); req.addr.ss_family = hwaddr_family; sdl = (struct sockaddr_dl *)&req.addr; sdl->sdl_alen = hwaddr_len; error = af_link_ioctl(SIOCGLIFADDR, &req); if (error) { return error; } if (!memcmp(&sdl->sdl_data[sdl->sdl_nlen], &mac, hwaddr_len)) { return 0; } oldaddr = req.addr; memset(&req, 0, sizeof(req)); ovs_strlcpy(req.iflr_name, netdev_name, sizeof(req.iflr_name)); req.flags = IFLR_ACTIVE; sdl = (struct sockaddr_dl *)&req.addr; sdl->sdl_len = offsetof(struct sockaddr_dl, sdl_data) + hwaddr_len; sdl->sdl_alen = hwaddr_len; sdl->sdl_family = hwaddr_family; memcpy(sdl->sdl_data, &mac, hwaddr_len); error = af_link_ioctl(SIOCALIFADDR, &req); if (error) { return error; } memset(&req, 0, sizeof(req)); ovs_strlcpy(req.iflr_name, netdev_name, sizeof(req.iflr_name)); req.addr = oldaddr; return af_link_ioctl(SIOCDLIFADDR, &req); #else #error not implemented #endif } static int ifr_get_flags(const struct ifreq *ifr) { #ifdef HAVE_STRUCT_IFREQ_IFR_FLAGSHIGH return (ifr->ifr_flagshigh << 16) | (ifr->ifr_flags & 0xffff); #else return ifr->ifr_flags; #endif } static void ifr_set_flags(struct ifreq *ifr, int flags) { #ifdef HAVE_STRUCT_IFREQ_IFR_FLAGSHIGH ifr->ifr_flags = flags & 0xffff; ifr->ifr_flagshigh = flags >> 16; #else ifr->ifr_flags = flags; #endif } #if defined(__NetBSD__) /* Calls ioctl() on an AF_LINK sock, passing the specified 'command' and * 'arg'. Returns 0 if successful, otherwise a positive errno value. */ int af_link_ioctl(unsigned long command, const void *arg) { static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; static int sock; if (ovsthread_once_start(&once)) { sock = socket(AF_LINK, SOCK_DGRAM, 0); if (sock < 0) { sock = -errno; VLOG_ERR("failed to create link socket: %s", ovs_strerror(errno)); } ovsthread_once_done(&once); } return (sock < 0 ? -sock : ioctl(sock, command, arg) == -1 ? errno : 0); } #endif #endif /* !defined(__MACH__) */