X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fnetdev-linux.c;h=736b588a8a11638555e83a047960402f20ac8755;hb=1ac981803fad658965714bf82fd6b17f910f4b33;hp=3e34044476be996653c16ceec841c0fc70dae9b9;hpb=1d87357a1322c2faa290452c08c7f794c0be848b;p=sliver-openvswitch.git diff --git a/lib/netdev-linux.c b/lib/netdev-linux.c index 3e3404447..736b588a8 100644 --- a/lib/netdev-linux.c +++ b/lib/netdev-linux.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2009 Nicira Networks. + * Copyright (c) 2009, 2010 Nicira Networks. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -21,6 +21,7 @@ #include #include #include +#include #include #include #include @@ -32,6 +33,7 @@ #include #include #include +#include #include #include #include @@ -48,6 +50,7 @@ #include "netlink.h" #include "ofpbuf.h" #include "openflow/openflow.h" +#include "openvswitch/gre.h" #include "packets.h" #include "poll-loop.h" #include "rtnetlink.h" @@ -55,6 +58,10 @@ #include "shash.h" #include "svec.h" +#ifndef GRE_IOCTL_ONLY +#include +#endif + #define THIS_MODULE VLM_netdev_linux #include "vlog.h" @@ -67,17 +74,8 @@ #define ADVERTISED_Asym_Pause (1 << 14) #endif -struct netdev_linux { - struct netdev netdev; - - /* File descriptors. For ordinary network devices, the two fds below are - * the same; for tap devices, they differ. */ - int netdev_fd; /* Network device. */ - int tap_fd; /* TAP character device, if any, otherwise the - * network device. */ - - struct netdev_linux_cache *cache; -}; +static struct rtnetlink_notifier netdev_linux_cache_notifier; +static int cache_notifier_refcount; enum { VALID_IFINDEX = 1 << 0, @@ -85,29 +83,62 @@ enum { VALID_IN4 = 1 << 2, VALID_IN6 = 1 << 3, VALID_MTU = 1 << 4, - VALID_CARRIER = 1 << 5 + VALID_CARRIER = 1 << 5, + VALID_IS_INTERNAL = 1 << 6 +}; + +struct tap_state { + int fd; }; -/* Cached network device information. */ -struct netdev_linux_cache { +struct netdev_dev_linux { + struct netdev_dev netdev_dev; + struct shash_node *shash_node; - unsigned int valid; - int ref_cnt; + unsigned int cache_valid; int ifindex; uint8_t etheraddr[ETH_ADDR_LEN]; - struct in_addr in4; + struct in_addr address, netmask; struct in6_addr in6; int mtu; int carrier; + bool is_internal; + + union { + struct tap_state tap; + } state; }; -static struct shash cache_map = SHASH_INITIALIZER(&cache_map); -static struct rtnetlink_notifier netdev_linux_cache_notifier; +struct netdev_linux { + struct netdev netdev; + int fd; +}; /* An AF_INET socket (used for ioctl operations). */ static int af_inet_sock = -1; +struct gre_config { + uint32_t local_ip; + uint32_t remote_ip; + uint32_t in_key; + uint32_t out_key; + uint8_t tos; + bool have_in_key; + bool have_out_key; + bool in_csum; + bool out_csum; + bool pmtud; +}; + +static struct { + union { + struct nl_sock *nl_sock; + int ioctl_fd; + }; + bool use_ioctl; +} gre_descriptors; + struct netdev_linux_notifier { struct netdev_notifier notifier; struct list node; @@ -121,9 +152,12 @@ static struct rtnetlink_notifier netdev_linux_poll_notifier; * additional log messages. */ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); -static int netdev_linux_do_ethtool(struct netdev *, struct ethtool_cmd *, +static int destroy_gre(const char *name); +static int netdev_linux_do_ethtool(const char *name, struct ethtool_cmd *, int cmd, const char *cmd_name); -static int netdev_linux_do_ioctl(const struct netdev *, struct ifreq *, +static int netdev_linux_do_ioctl(const char *name, struct ifreq *, int cmd, + const char *cmd_name); +static int netdev_linux_get_ipv4(const struct netdev *, struct in_addr *, int cmd, const char *cmd_name); static int get_flags(const struct netdev *, int *flagsp); static int set_flags(struct netdev *, int flags); @@ -138,10 +172,21 @@ static int set_etheraddr(const char *netdev_name, int hwaddr_family, static int get_stats_via_netlink(int ifindex, struct netdev_stats *stats); static int get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats); +static struct netdev_dev_linux * +netdev_dev_linux_cast(const struct netdev_dev *netdev_dev) +{ + const char *type = netdev_dev_get_type(netdev_dev); + assert(!strcmp(type, "system") || !strcmp(type, "tap") + || !strcmp(type, "gre")); + return CONTAINER_OF(netdev_dev, struct netdev_dev_linux, netdev_dev); +} + static struct netdev_linux * netdev_linux_cast(const struct netdev *netdev) { - netdev_assert_class(netdev, &netdev_linux_class); + const char *type = netdev_get_type(netdev); + assert(!strcmp(type, "system") || !strcmp(type, "tap") + || !strcmp(type, "gre")); return CONTAINER_OF(netdev, struct netdev_linux, netdev); } @@ -173,87 +218,631 @@ netdev_linux_wait(void) static void netdev_linux_cache_cb(const struct rtnetlink_change *change, - void *aux UNUSED) + void *aux OVS_UNUSED) { - struct netdev_linux_cache *cache; + struct netdev_dev_linux *dev; if (change) { - cache = shash_find_data(&cache_map, change->ifname); - if (cache) { - cache->valid = 0; + struct netdev_dev *base_dev = netdev_dev_from_name(change->ifname); + if (base_dev) { + dev = netdev_dev_linux_cast(base_dev); + dev->cache_valid = 0; } } else { + struct shash device_shash; struct shash_node *node; - SHASH_FOR_EACH (node, &cache_map) { - cache = node->data; - cache->valid = 0; + + shash_init(&device_shash); + netdev_dev_get_devices(&netdev_linux_class, &device_shash); + SHASH_FOR_EACH (node, &device_shash) { + dev = node->data; + dev->cache_valid = 0; } + shash_destroy(&device_shash); } } +/* The arguments are marked as unused to prevent warnings on platforms where + * the Netlink interface isn't supported. */ static int -netdev_linux_open(const char *name, char *suffix, int ethertype, - struct netdev **netdevp) +setup_gre_netlink(const char *name OVS_UNUSED, + struct gre_config *config OVS_UNUSED, bool create OVS_UNUSED) { - struct netdev_linux *netdev; - enum netdev_flags flags; +#ifdef GRE_IOCTL_ONLY + return EOPNOTSUPP; +#else int error; + struct ofpbuf request, *reply; + unsigned int nl_flags; + struct ifinfomsg ifinfomsg; + struct nlattr *linkinfo_hdr; + struct nlattr *info_data_hdr; + uint16_t iflags = 0; + uint16_t oflags = 0; + + VLOG_DBG("%s: attempting to create gre device using netlink", name); + + if (!gre_descriptors.nl_sock) { + error = nl_sock_create(NETLINK_ROUTE, 0, 0, 0, + &gre_descriptors.nl_sock); + if (error) { + VLOG_WARN("couldn't create netlink socket: %s", strerror(error)); + goto error; + } + } - /* Allocate network device. */ - netdev = xcalloc(1, sizeof *netdev); - netdev_init(&netdev->netdev, suffix, &netdev_linux_class); - netdev->netdev_fd = -1; - netdev->tap_fd = -1; - netdev->cache = shash_find_data(&cache_map, suffix); - if (!netdev->cache) { - if (shash_is_empty(&cache_map)) { - int error = rtnetlink_notifier_register( - &netdev_linux_cache_notifier, netdev_linux_cache_cb, NULL); - if (error) { - netdev_close(&netdev->netdev); - return error; + ofpbuf_init(&request, 0); + + nl_flags = NLM_F_REQUEST; + if (create) { + nl_flags |= NLM_F_CREATE|NLM_F_EXCL; + } + + /* We over-reserve space, because we do some pointer arithmetic + * and don't want the buffer address shifting under us. */ + nl_msg_put_nlmsghdr(&request, gre_descriptors.nl_sock, 2048, RTM_NEWLINK, + nl_flags); + + memset(&ifinfomsg, 0, sizeof ifinfomsg); + ifinfomsg.ifi_family = AF_UNSPEC; + nl_msg_put(&request, &ifinfomsg, sizeof ifinfomsg); + + linkinfo_hdr = ofpbuf_tail(&request); + nl_msg_put_unspec(&request, IFLA_LINKINFO, NULL, 0); + + nl_msg_put_unspec(&request, IFLA_INFO_KIND, "gretap", 6); + + info_data_hdr = ofpbuf_tail(&request); + nl_msg_put_unspec(&request, IFLA_INFO_DATA, NULL, 0); + + /* Set flags */ + if (config->have_in_key) { + iflags |= GRE_KEY; + } + if (config->have_out_key) { + oflags |= GRE_KEY; + } + + if (config->in_csum) { + iflags |= GRE_CSUM; + } + if (config->out_csum) { + oflags |= GRE_CSUM; + } + + /* Add options */ + nl_msg_put_u32(&request, IFLA_GRE_IKEY, config->in_key); + nl_msg_put_u32(&request, IFLA_GRE_OKEY, config->out_key); + nl_msg_put_u16(&request, IFLA_GRE_IFLAGS, iflags); + nl_msg_put_u16(&request, IFLA_GRE_OFLAGS, oflags); + nl_msg_put_u32(&request, IFLA_GRE_LOCAL, config->local_ip); + nl_msg_put_u32(&request, IFLA_GRE_REMOTE, config->remote_ip); + nl_msg_put_u8(&request, IFLA_GRE_PMTUDISC, config->pmtud); + nl_msg_put_u8(&request, IFLA_GRE_TTL, IPDEFTTL); + nl_msg_put_u8(&request, IFLA_GRE_TOS, config->tos); + + info_data_hdr->nla_len = (char *)ofpbuf_tail(&request) + - (char *)info_data_hdr; + linkinfo_hdr->nla_len = (char *)ofpbuf_tail(&request) + - (char *)linkinfo_hdr; + + nl_msg_put_string(&request, IFLA_IFNAME, name); + + error = nl_sock_transact(gre_descriptors.nl_sock, &request, &reply); + ofpbuf_uninit(&request); + if (error) { + VLOG_WARN("couldn't transact netlink socket: %s", strerror(error)); + goto error; + } + ofpbuf_delete(reply); + +error: + return error; +#endif +} + +static int +setup_gre_ioctl(const char *name, struct gre_config *config, bool create) +{ + struct ip_tunnel_parm p; + struct ifreq ifr; + + VLOG_DBG("%s: attempting to create gre device using ioctl", name); + + memset(&p, 0, sizeof p); + + strncpy(p.name, name, IFNAMSIZ); + + p.iph.version = 4; + p.iph.ihl = 5; + p.iph.protocol = IPPROTO_GRE; + p.iph.saddr = config->local_ip; + p.iph.daddr = config->remote_ip; + p.iph.ttl = IPDEFTTL; + p.iph.tos = config->tos; + + if (config->have_in_key) { + p.i_flags |= GRE_KEY; + p.i_key = config->in_key; + } + if (config->have_out_key) { + p.o_flags |= GRE_KEY; + p.o_key = config->out_key; + } + + if (config->in_csum) { + p.i_flags |= GRE_CSUM; + } + if (config->out_csum) { + p.o_flags |= GRE_CSUM; + } + + if (config->pmtud) { + p.iph.frag_off = htons(IP_DONT_FRAGMENT); + } + + strncpy(ifr.ifr_name, create ? GRE_IOCTL_DEVICE : name, IFNAMSIZ); + ifr.ifr_ifru.ifru_data = (void *)&p; + + if (!gre_descriptors.ioctl_fd) { + gre_descriptors.ioctl_fd = socket(AF_INET, SOCK_DGRAM, 0); + if (gre_descriptors.ioctl_fd < 0) { + VLOG_WARN("couldn't create gre ioctl socket: %s", strerror(errno)); + gre_descriptors.ioctl_fd = 0; + return errno; + } + } + + if (ioctl(gre_descriptors.ioctl_fd, create ? SIOCADDGRETAP : SIOCCHGGRETAP, + &ifr) < 0) { + VLOG_WARN("couldn't do gre ioctl: %s", strerror(errno)); + return errno; + } + + return 0; +} + +/* The arguments are marked as unused to prevent warnings on platforms where + * the Netlink interface isn't supported. */ +static bool +check_gre_device_netlink(const char *name OVS_UNUSED) +{ +#ifdef GRE_IOCTL_ONLY + return false; +#else + static const struct nl_policy getlink_policy[] = { + [IFLA_LINKINFO] = { .type = NL_A_NESTED, .optional = false }, + }; + + static const struct nl_policy linkinfo_policy[] = { + [IFLA_INFO_KIND] = { .type = NL_A_STRING, .optional = false }, + }; + + int error; + bool ret = false; + struct ofpbuf request, *reply; + struct ifinfomsg ifinfomsg; + struct nlattr *getlink_attrs[ARRAY_SIZE(getlink_policy)]; + struct nlattr *linkinfo_attrs[ARRAY_SIZE(linkinfo_policy)]; + struct ofpbuf linkinfo; + const char *device_kind; + + ofpbuf_init(&request, 0); + + nl_msg_put_nlmsghdr(&request, gre_descriptors.nl_sock, + NLMSG_LENGTH(sizeof ifinfomsg), RTM_GETLINK, + NLM_F_REQUEST); + + memset(&ifinfomsg, 0, sizeof ifinfomsg); + ifinfomsg.ifi_family = AF_UNSPEC; + ifinfomsg.ifi_index = do_get_ifindex(name); + nl_msg_put(&request, &ifinfomsg, sizeof ifinfomsg); + + error = nl_sock_transact(gre_descriptors.nl_sock, &request, &reply); + ofpbuf_uninit(&request); + if (error) { + VLOG_WARN("couldn't transact netlink socket: %s", strerror(error)); + return false; + } + + if (!nl_policy_parse(reply, NLMSG_HDRLEN + sizeof(struct ifinfomsg), + getlink_policy, getlink_attrs, + ARRAY_SIZE(getlink_policy))) { + VLOG_WARN("received bad rtnl message (getlink policy)"); + goto error; + } + + linkinfo.data = (void *)nl_attr_get(getlink_attrs[IFLA_LINKINFO]); + linkinfo.size = nl_attr_get_size(getlink_attrs[IFLA_LINKINFO]); + if (!nl_policy_parse(&linkinfo, 0, linkinfo_policy, + linkinfo_attrs, ARRAY_SIZE(linkinfo_policy))) { + VLOG_WARN("received bad rtnl message (linkinfo policy)"); + goto error; + } + + device_kind = nl_attr_get_string(linkinfo_attrs[IFLA_INFO_KIND]); + ret = !strcmp(device_kind, "gretap"); + +error: + ofpbuf_delete(reply); + return ret; +#endif +} + +static bool +check_gre_device_ioctl(const char *name) +{ + struct ethtool_drvinfo drvinfo; + int error; + + memset(&drvinfo, 0, sizeof drvinfo); + error = netdev_linux_do_ethtool(name, (struct ethtool_cmd *)&drvinfo, + ETHTOOL_GDRVINFO, "ETHTOOL_GDRVINFO"); + + return !error && !strcmp(drvinfo.driver, "ip_gre") + && !strcmp(drvinfo.bus_info, "gretap"); +} + +static int +setup_gre(const char *name, const struct shash *args, bool create) +{ + int error; + struct in_addr in_addr; + struct shash_node *node; + struct gre_config config; + + memset(&config, 0, sizeof config); + config.in_csum = true; + config.out_csum = true; + config.pmtud = true; + + SHASH_FOR_EACH (node, args) { + if (!strcmp(node->name, "remote_ip")) { + if (lookup_ip(node->data, &in_addr)) { + VLOG_WARN("bad 'remote_ip' for gre device %s ", name); + } else { + config.remote_ip = in_addr.s_addr; } + } else if (!strcmp(node->name, "local_ip")) { + if (lookup_ip(node->data, &in_addr)) { + VLOG_WARN("bad 'local_ip' for gre device %s ", name); + } else { + config.local_ip = in_addr.s_addr; + } + } else if (!strcmp(node->name, "key")) { + config.have_in_key = true; + config.have_out_key = true; + config.in_key = htonl(atoi(node->data)); + config.out_key = htonl(atoi(node->data)); + } else if (!strcmp(node->name, "in_key")) { + config.have_in_key = true; + config.in_key = htonl(atoi(node->data)); + } else if (!strcmp(node->name, "out_key")) { + config.have_out_key = true; + config.out_key = htonl(atoi(node->data)); + } else if (!strcmp(node->name, "tos")) { + config.tos = atoi(node->data); + } else if (!strcmp(node->name, "csum")) { + if (!strcmp(node->data, "false")) { + config.in_csum = false; + config.out_csum = false; + } + } else if (!strcmp(node->name, "pmtud")) { + if (!strcmp(node->data, "false")) { + config.pmtud = false; + } + } else { + VLOG_WARN("unknown gre argument '%s'", node->name); } - netdev->cache = xmalloc(sizeof *netdev->cache); - netdev->cache->shash_node = shash_add(&cache_map, suffix, - netdev->cache); - netdev->cache->valid = 0; - netdev->cache->ref_cnt = 0; } - netdev->cache->ref_cnt++; - if (!strncmp(name, "tap:", 4)) { - static const char tap_dev[] = "/dev/net/tun"; - struct ifreq ifr; + if (!config.remote_ip) { + VLOG_WARN("gre type requires valid 'remote_ip' argument"); + error = EINVAL; + goto error; + } - /* Open tap device. */ - netdev->tap_fd = open(tap_dev, O_RDWR); - if (netdev->tap_fd < 0) { - error = errno; - VLOG_WARN("opening \"%s\" failed: %s", tap_dev, strerror(error)); + if (!gre_descriptors.use_ioctl) { + error = setup_gre_netlink(name, &config, create); + if (error == EOPNOTSUPP) { + gre_descriptors.use_ioctl = true; + } + } + if (gre_descriptors.use_ioctl) { + error = setup_gre_ioctl(name, &config, create); + } + + if (create && error == EEXIST) { + bool gre_device; + + if (gre_descriptors.use_ioctl) { + gre_device = check_gre_device_ioctl(name); + } else { + gre_device = check_gre_device_netlink(name); + } + + if (!gre_device) { goto error; } - /* Create tap device. */ - ifr.ifr_flags = IFF_TAP | IFF_NO_PI; - error = netdev_linux_do_ioctl(&netdev->netdev, &ifr, - TUNSETIFF, "TUNSETIFF"); + VLOG_WARN("replacing existing gre device %s", name); + error = destroy_gre(name); if (error) { goto error; } - /* Make non-blocking. */ - error = set_nonblocking(netdev->tap_fd); + if (gre_descriptors.use_ioctl) { + error = setup_gre_ioctl(name, &config, create); + } else { + error = setup_gre_netlink(name, &config, create); + } + } + +error: + return error; +} + +/* Creates the netdev device of 'type' with 'name'. */ +static int +netdev_linux_create_system(const char *name, const char *type OVS_UNUSED, + const struct shash *args, struct netdev_dev **netdev_devp) +{ + struct netdev_dev_linux *netdev_dev; + int error; + + if (!shash_is_empty(args)) { + VLOG_WARN("%s: arguments for system devices should be empty", name); + } + + if (!cache_notifier_refcount) { + error = rtnetlink_notifier_register(&netdev_linux_cache_notifier, + netdev_linux_cache_cb, NULL); if (error) { - goto error; + return error; } } + cache_notifier_refcount++; + + netdev_dev = xzalloc(sizeof *netdev_dev); + netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_linux_class); + + *netdev_devp = &netdev_dev->netdev_dev; + return 0; +} + +/* For most types of netdevs we open the device for each call of + * netdev_open(). However, this is not the case with tap devices, + * since it is only possible to open the device once. In this + * situation we share a single file descriptor, and consequently + * buffers, across all readers. Therefore once data is read it will + * be unavailable to other reads for tap devices. */ +static int +netdev_linux_create_tap(const char *name, const char *type OVS_UNUSED, + const struct shash *args, struct netdev_dev **netdev_devp) +{ + struct netdev_dev_linux *netdev_dev; + struct tap_state *state; + static const char tap_dev[] = "/dev/net/tun"; + struct ifreq ifr; + int error; + + if (!shash_is_empty(args)) { + VLOG_WARN("%s: arguments for TAP devices should be empty", name); + } + + netdev_dev = xzalloc(sizeof *netdev_dev); + state = &netdev_dev->state.tap; + + /* Open tap device. */ + state->fd = open(tap_dev, O_RDWR); + if (state->fd < 0) { + error = errno; + VLOG_WARN("opening \"%s\" failed: %s", tap_dev, strerror(error)); + goto error; + } + + /* Create tap device. */ + ifr.ifr_flags = IFF_TAP | IFF_NO_PI; + strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name); + if (ioctl(state->fd, TUNSETIFF, &ifr) == -1) { + VLOG_WARN("%s: creating tap device failed: %s", name, + strerror(errno)); + error = errno; + goto error; + } + + /* Make non-blocking. */ + error = set_nonblocking(state->fd); + if (error) { + goto error; + } + + netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_tap_class); + *netdev_devp = &netdev_dev->netdev_dev; + return 0; + +error: + free(netdev_dev); + return error; +} + +static int +if_up(const char *name) +{ + struct ifreq ifr; + + strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name); + ifr.ifr_flags = IFF_UP; + + if (ioctl(af_inet_sock, SIOCSIFFLAGS, &ifr) == -1) { + VLOG_DBG_RL(&rl, "%s: failed to bring device up: %s", + name, strerror(errno)); + return errno; + } + + return 0; +} + +static int +netdev_linux_create_gre(const char *name, const char *type OVS_UNUSED, + const struct shash *args, struct netdev_dev **netdev_devp) +{ + struct netdev_dev_linux *netdev_dev; + int error; + + netdev_dev = xzalloc(sizeof *netdev_dev); + + error = setup_gre(name, args, true); + if (error) { + goto error; + } + + error = if_up(name); + if (error) { + goto error; + } + + netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_gre_class); + *netdev_devp = &netdev_dev->netdev_dev; + return 0; + +error: + free(netdev_dev); + return error; +} + +static int +netdev_linux_reconfigure_gre(struct netdev_dev *netdev_dev_, + const struct shash *args) +{ + const char *name = netdev_dev_get_name(netdev_dev_); + + return setup_gre(name, args, false); +} + +/* The arguments are marked as unused to prevent warnings on platforms where + * the Netlink interface isn't supported. */ +static int +destroy_gre_netlink(const char *name OVS_UNUSED) +{ +#ifdef GRE_IOCTL_ONLY + return EOPNOTSUPP; +#else + int error; + struct ofpbuf request, *reply; + struct ifinfomsg ifinfomsg; + int ifindex; + + ofpbuf_init(&request, 0); + + nl_msg_put_nlmsghdr(&request, gre_descriptors.nl_sock, 0, RTM_DELLINK, + NLM_F_REQUEST); + + memset(&ifinfomsg, 0, sizeof ifinfomsg); + ifinfomsg.ifi_family = AF_UNSPEC; + nl_msg_put(&request, &ifinfomsg, sizeof ifinfomsg); + + ifindex = do_get_ifindex(name); + nl_msg_put_u32(&request, IFLA_LINK, ifindex); + + nl_msg_put_string(&request, IFLA_IFNAME, name); + + error = nl_sock_transact(gre_descriptors.nl_sock, &request, &reply); + ofpbuf_uninit(&request); + if (error) { + VLOG_WARN("couldn't transact netlink socket: %s", strerror(error)); + goto error; + } + ofpbuf_delete(reply); + +error: + return 0; +#endif +} + +static int +destroy_gre_ioctl(const char *name) +{ + struct ip_tunnel_parm p; + struct ifreq ifr; + + memset(&p, 0, sizeof p); + strncpy(p.name, name, IFNAMSIZ); + + strncpy(ifr.ifr_name, name, IFNAMSIZ); + ifr.ifr_ifru.ifru_data = (void *)&p; + + if (ioctl(gre_descriptors.ioctl_fd, SIOCDELGRETAP, &ifr) < 0) { + VLOG_WARN("couldn't do gre ioctl: %s\n", strerror(errno)); + return errno; + } + + return 0; +} + +static void +destroy_tap(struct netdev_dev_linux *netdev_dev) +{ + struct tap_state *state = &netdev_dev->state.tap; + + if (state->fd >= 0) { + close(state->fd); + } +} + +static int +destroy_gre(const char *name) +{ + if (gre_descriptors.use_ioctl) { + return destroy_gre_ioctl(name); + } else { + return destroy_gre_netlink(name); + } +} + +/* Destroys the netdev device 'netdev_dev_'. */ +static void +netdev_linux_destroy(struct netdev_dev *netdev_dev_) +{ + struct netdev_dev_linux *netdev_dev = netdev_dev_linux_cast(netdev_dev_); + const char *type = netdev_dev_get_type(netdev_dev_); + + if (!strcmp(type, "system")) { + cache_notifier_refcount--; + + if (!cache_notifier_refcount) { + rtnetlink_notifier_unregister(&netdev_linux_cache_notifier); + } + } else if (!strcmp(type, "tap")) { + destroy_tap(netdev_dev); + } else if (!strcmp(type, "gre")) { + destroy_gre(netdev_dev_get_name(&netdev_dev->netdev_dev)); + } + + free(netdev_dev_); +} + +static int +netdev_linux_open(struct netdev_dev *netdev_dev_, int ethertype, + struct netdev **netdevp) +{ + struct netdev_dev_linux *netdev_dev = netdev_dev_linux_cast(netdev_dev_); + struct netdev_linux *netdev; + enum netdev_flags flags; + int error; + + /* Allocate network device. */ + netdev = xzalloc(sizeof *netdev); + netdev->fd = -1; + netdev_init(&netdev->netdev, netdev_dev_); error = netdev_get_flags(&netdev->netdev, &flags); if (error == ENODEV) { goto error; } - if (netdev->tap_fd >= 0 || ethertype != NETDEV_ETH_TYPE_NONE) { + if (!strcmp(netdev_dev_get_type(netdev_dev_), "tap")) { + netdev->fd = netdev_dev->state.tap.fd; + } else if (ethertype != NETDEV_ETH_TYPE_NONE) { struct sockaddr_ll sll; int protocol; int ifindex; @@ -262,17 +851,14 @@ netdev_linux_open(const char *name, char *suffix, int ethertype, protocol = (ethertype == NETDEV_ETH_TYPE_ANY ? ETH_P_ALL : ethertype == NETDEV_ETH_TYPE_802_2 ? ETH_P_802_2 : ethertype); - netdev->netdev_fd = socket(PF_PACKET, SOCK_RAW, htons(protocol)); - if (netdev->netdev_fd < 0) { + netdev->fd = socket(PF_PACKET, SOCK_RAW, htons(protocol)); + if (netdev->fd < 0) { error = errno; goto error; } - if (netdev->tap_fd < 0) { - netdev->tap_fd = netdev->netdev_fd; - } /* Set non-blocking mode. */ - error = set_nonblocking(netdev->netdev_fd); + error = set_nonblocking(netdev->fd); if (error) { goto error; } @@ -287,10 +873,11 @@ netdev_linux_open(const char *name, char *suffix, int ethertype, memset(&sll, 0, sizeof sll); sll.sll_family = AF_PACKET; sll.sll_ifindex = ifindex; - if (bind(netdev->netdev_fd, + if (bind(netdev->fd, (struct sockaddr *) &sll, sizeof sll) < 0) { error = errno; - VLOG_ERR("bind to %s failed: %s", suffix, strerror(error)); + VLOG_ERR("bind to %s failed: %s", netdev_dev_get_name(netdev_dev_), + strerror(error)); goto error; } @@ -298,7 +885,7 @@ netdev_linux_open(const char *name, char *suffix, int ethertype, * packets of the requested type on all system interfaces. We do not * want to receive that data, but there is no way to avoid it. So we * must now drain out the receive queue. */ - error = drain_rcvbuf(netdev->netdev_fd); + error = drain_rcvbuf(netdev->fd); if (error) { goto error; } @@ -308,7 +895,7 @@ netdev_linux_open(const char *name, char *suffix, int ethertype, return 0; error: - netdev_close(&netdev->netdev); + netdev_uninit(&netdev->netdev, true); return error; } @@ -318,19 +905,8 @@ netdev_linux_close(struct netdev *netdev_) { struct netdev_linux *netdev = netdev_linux_cast(netdev_); - if (netdev->cache && !--netdev->cache->ref_cnt) { - shash_delete(&cache_map, netdev->cache->shash_node); - free(netdev->cache); - - if (shash_is_empty(&cache_map)) { - rtnetlink_notifier_unregister(&netdev_linux_cache_notifier); - } - } - if (netdev->netdev_fd >= 0) { - close(netdev->netdev_fd); - } - if (netdev->tap_fd >= 0 && netdev->netdev_fd != netdev->tap_fd) { - close(netdev->tap_fd); + if (netdev->fd > 0 && strcmp(netdev_get_type(netdev_), "tap")) { + close(netdev->fd); } free(netdev); } @@ -362,13 +938,13 @@ netdev_linux_recv(struct netdev *netdev_, void *data, size_t size) { struct netdev_linux *netdev = netdev_linux_cast(netdev_); - if (netdev->tap_fd < 0) { + if (netdev->fd < 0) { /* Device was opened with NETDEV_ETH_TYPE_NONE. */ - return EAGAIN; + return -EAGAIN; } for (;;) { - ssize_t retval = read(netdev->tap_fd, data, size); + ssize_t retval = read(netdev->fd, data, size); if (retval >= 0) { return retval; } else if (errno != EINTR) { @@ -376,7 +952,7 @@ netdev_linux_recv(struct netdev *netdev_, void *data, size_t size) VLOG_WARN_RL(&rl, "error receiving Ethernet packet on %s: %s", strerror(errno), netdev_get_name(netdev_)); } - return errno; + return -errno; } } } @@ -387,8 +963,8 @@ static void netdev_linux_recv_wait(struct netdev *netdev_) { struct netdev_linux *netdev = netdev_linux_cast(netdev_); - if (netdev->tap_fd >= 0) { - poll_fd_wait(netdev->tap_fd, POLLIN); + if (netdev->fd >= 0) { + poll_fd_wait(netdev->fd, POLLIN); } } @@ -397,19 +973,19 @@ static int netdev_linux_drain(struct netdev *netdev_) { struct netdev_linux *netdev = netdev_linux_cast(netdev_); - if (netdev->tap_fd < 0 && netdev->netdev_fd < 0) { + if (netdev->fd < 0) { return 0; - } else if (netdev->tap_fd != netdev->netdev_fd) { + } else if (!strcmp(netdev_get_type(netdev_), "tap")) { struct ifreq ifr; - int error = netdev_linux_do_ioctl(netdev_, &ifr, + int error = netdev_linux_do_ioctl(netdev_get_name(netdev_), &ifr, SIOCGIFTXQLEN, "SIOCGIFTXQLEN"); if (error) { return error; } - drain_fd(netdev->tap_fd, ifr.ifr_qlen); + drain_fd(netdev->fd, ifr.ifr_qlen); return 0; } else { - return drain_rcvbuf(netdev->netdev_fd); + return drain_rcvbuf(netdev->fd); } } @@ -429,12 +1005,12 @@ netdev_linux_send(struct netdev *netdev_, const void *data, size_t size) /* XXX should support sending even if 'ethertype' was NETDEV_ETH_TYPE_NONE. */ - if (netdev->tap_fd < 0) { + if (netdev->fd < 0) { return EPIPE; } for (;;) { - ssize_t retval = write(netdev->tap_fd, data, size); + ssize_t retval = write(netdev->fd, data, size); if (retval < 0) { /* The Linux AF_PACKET implementation never blocks waiting for room * for packets, instead returning ENOBUFS. Translate this into @@ -469,10 +1045,10 @@ static void netdev_linux_send_wait(struct netdev *netdev_) { struct netdev_linux *netdev = netdev_linux_cast(netdev_); - if (netdev->tap_fd < 0 && netdev->netdev_fd < 0) { + if (netdev->fd < 0) { /* Nothing to do. */ - } else if (netdev->tap_fd == netdev->netdev_fd) { - poll_fd_wait(netdev->tap_fd, POLLOUT); + } else if (strcmp(netdev_get_type(netdev_), "tap")) { + poll_fd_wait(netdev->fd, POLLOUT); } else { /* TAP device always accepts packets.*/ poll_immediate_wake(); @@ -485,10 +1061,19 @@ static int netdev_linux_set_etheraddr(struct netdev *netdev_, const uint8_t mac[ETH_ADDR_LEN]) { - struct netdev_linux *netdev = netdev_linux_cast(netdev_); - int error = set_etheraddr(netdev_get_name(netdev_), ARPHRD_ETHER, mac); - if (!error) { - memcpy(netdev->cache->etheraddr, mac, ETH_ADDR_LEN); + struct netdev_dev_linux *netdev_dev = + netdev_dev_linux_cast(netdev_get_dev(netdev_)); + int error; + + if (!(netdev_dev->cache_valid & VALID_ETHERADDR) + || !eth_addr_equals(netdev_dev->etheraddr, mac)) { + error = set_etheraddr(netdev_get_name(netdev_), ARPHRD_ETHER, mac); + if (!error) { + netdev_dev->cache_valid |= VALID_ETHERADDR; + memcpy(netdev_dev->etheraddr, mac, ETH_ADDR_LEN); + } + } else { + error = 0; } return error; } @@ -499,16 +1084,17 @@ static int netdev_linux_get_etheraddr(const struct netdev *netdev_, uint8_t mac[ETH_ADDR_LEN]) { - struct netdev_linux *netdev = netdev_linux_cast(netdev_); - if (!(netdev->cache->valid & VALID_ETHERADDR)) { + struct netdev_dev_linux *netdev_dev = + netdev_dev_linux_cast(netdev_get_dev(netdev_)); + if (!(netdev_dev->cache_valid & VALID_ETHERADDR)) { int error = get_etheraddr(netdev_get_name(netdev_), - netdev->cache->etheraddr); + netdev_dev->etheraddr); if (error) { return error; } - netdev->cache->valid |= VALID_ETHERADDR; + netdev_dev->cache_valid |= VALID_ETHERADDR; } - memcpy(mac, netdev->cache->etheraddr, ETH_ADDR_LEN); + memcpy(mac, netdev_dev->etheraddr, ETH_ADDR_LEN); return 0; } @@ -518,35 +1104,50 @@ netdev_linux_get_etheraddr(const struct netdev *netdev_, static int netdev_linux_get_mtu(const struct netdev *netdev_, int *mtup) { - struct netdev_linux *netdev = netdev_linux_cast(netdev_); - if (!(netdev->cache->valid & VALID_MTU)) { + struct netdev_dev_linux *netdev_dev = + netdev_dev_linux_cast(netdev_get_dev(netdev_)); + if (!(netdev_dev->cache_valid & VALID_MTU)) { struct ifreq ifr; int error; - error = netdev_linux_do_ioctl(netdev_, &ifr, SIOCGIFMTU, "SIOCGIFMTU"); + error = netdev_linux_do_ioctl(netdev_get_name(netdev_), &ifr, + SIOCGIFMTU, "SIOCGIFMTU"); if (error) { return error; } - netdev->cache->mtu = ifr.ifr_mtu; - netdev->cache->valid |= VALID_MTU; + netdev_dev->mtu = ifr.ifr_mtu; + netdev_dev->cache_valid |= VALID_MTU; } - *mtup = netdev->cache->mtu; + *mtup = netdev_dev->mtu; return 0; } +/* Returns the ifindex of 'netdev', if successful, as a positive number. + * On failure, returns a negative errno value. */ +static int +netdev_linux_get_ifindex(const struct netdev *netdev) +{ + int ifindex, error; + + error = get_ifindex(netdev, &ifindex); + return error ? -error : ifindex; +} + static int netdev_linux_get_carrier(const struct netdev *netdev_, bool *carrier) { - struct netdev_linux *netdev = netdev_linux_cast(netdev_); + struct netdev_dev_linux *netdev_dev = + netdev_dev_linux_cast(netdev_get_dev(netdev_)); int error = 0; char *fn = NULL; int fd = -1; - if (!(netdev->cache->valid & VALID_CARRIER)) { + if (!(netdev_dev->cache_valid & VALID_CARRIER)) { char line[8]; int retval; - fn = xasprintf("/sys/class/net/%s/carrier", netdev_get_name(netdev_)); + fn = xasprintf("/sys/class/net/%s/carrier", + netdev_get_name(netdev_)); fd = open(fn, O_RDONLY); if (fd < 0) { error = errno; @@ -576,10 +1177,10 @@ netdev_linux_get_carrier(const struct netdev *netdev_, bool *carrier) fn, line[0]); goto exit; } - netdev->cache->carrier = line[0] != '0'; - netdev->cache->valid |= VALID_CARRIER; + netdev_dev->carrier = line[0] != '0'; + netdev_dev->cache_valid |= VALID_CARRIER; } - *carrier = netdev->cache->carrier; + *carrier = netdev_dev->carrier; error = 0; exit: @@ -623,33 +1224,91 @@ check_for_working_netlink_stats(void) * XXX All of the members of struct netdev_stats are 64 bits wide, but on * 32-bit architectures the Linux network stats are only 32 bits. */ static int -netdev_linux_get_stats(const struct netdev *netdev, struct netdev_stats *stats) +netdev_linux_get_stats(const struct netdev *netdev_, + struct netdev_stats *stats) { + struct netdev_dev_linux *netdev_dev = + netdev_dev_linux_cast(netdev_get_dev(netdev_)); static int use_netlink_stats = -1; int error; + struct netdev_stats raw_stats; + struct netdev_stats *collect_stats = stats; COVERAGE_INC(netdev_get_stats); + + if (!(netdev_dev->cache_valid & VALID_IS_INTERNAL)) { + netdev_dev->is_internal = !strcmp(netdev_get_type(netdev_), "tap"); + if (!netdev_dev->is_internal) { + struct ethtool_drvinfo drvinfo; + + memset(&drvinfo, 0, sizeof drvinfo); + error = netdev_linux_do_ethtool(netdev_get_name(netdev_), + (struct ethtool_cmd *)&drvinfo, + ETHTOOL_GDRVINFO, + "ETHTOOL_GDRVINFO"); + + if (!error) { + netdev_dev->is_internal = !strcmp(drvinfo.driver, + "openvswitch"); + } + } + + netdev_dev->cache_valid |= VALID_IS_INTERNAL; + } + + if (netdev_dev->is_internal) { + collect_stats = &raw_stats; + } + if (use_netlink_stats < 0) { use_netlink_stats = check_for_working_netlink_stats(); } if (use_netlink_stats) { int ifindex; - error = get_ifindex(netdev, &ifindex); + error = get_ifindex(netdev_, &ifindex); if (!error) { - error = get_stats_via_netlink(ifindex, stats); + error = get_stats_via_netlink(ifindex, collect_stats); } } else { - error = get_stats_via_proc(netdev->name, stats); + error = get_stats_via_proc(netdev_get_name(netdev_), collect_stats); + } + + /* If this port is an internal port then the transmit and receive stats + * will appear to be swapped relative to the other ports since we are the + * one sending the data, not a remote computer. For consistency, we swap + * them back here. */ + if (!error && netdev_dev->is_internal) { + stats->rx_packets = raw_stats.tx_packets; + stats->tx_packets = raw_stats.rx_packets; + stats->rx_bytes = raw_stats.tx_bytes; + stats->tx_bytes = raw_stats.rx_bytes; + stats->rx_errors = raw_stats.tx_errors; + stats->tx_errors = raw_stats.rx_errors; + stats->rx_dropped = raw_stats.tx_dropped; + stats->tx_dropped = raw_stats.rx_dropped; + stats->multicast = raw_stats.multicast; + stats->collisions = raw_stats.collisions; + stats->rx_length_errors = 0; + stats->rx_over_errors = 0; + stats->rx_crc_errors = 0; + stats->rx_frame_errors = 0; + stats->rx_fifo_errors = 0; + stats->rx_missed_errors = 0; + stats->tx_aborted_errors = 0; + stats->tx_carrier_errors = 0; + stats->tx_fifo_errors = 0; + stats->tx_heartbeat_errors = 0; + stats->tx_window_errors = 0; } + return error; } /* 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. */ + * successful, otherwise a positive errno value. */ static int netdev_linux_get_features(struct netdev *netdev, uint32_t *current, uint32_t *advertised, @@ -659,7 +1318,7 @@ netdev_linux_get_features(struct netdev *netdev, int error; memset(&ecmd, 0, sizeof ecmd); - error = netdev_linux_do_ethtool(netdev, &ecmd, + error = netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd, ETHTOOL_GSET, "ETHTOOL_GSET"); if (error) { return error; @@ -780,7 +1439,7 @@ netdev_linux_set_advertisements(struct netdev *netdev, uint32_t advertise) int error; memset(&ecmd, 0, sizeof ecmd); - error = netdev_linux_do_ethtool(netdev, &ecmd, + error = netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd, ETHTOOL_GSET, "ETHTOOL_GSET"); if (error) { return error; @@ -823,7 +1482,7 @@ netdev_linux_set_advertisements(struct netdev *netdev, uint32_t advertise) if (advertise & OFPPF_PAUSE_ASYM) { ecmd.advertising |= ADVERTISED_Asym_Pause; } - return netdev_linux_do_ethtool(netdev, &ecmd, + return netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd, ETHTOOL_SSET, "ETHTOOL_SSET"); } @@ -901,8 +1560,8 @@ netdev_linux_set_policing(struct netdev *netdev, COVERAGE_INC(netdev_set_policing); if (kbits_rate) { if (!kbits_burst) { - /* Default to 10 kilobits if not specified. */ - kbits_burst = 10; + /* Default to 1000 kilobits if not specified. */ + kbits_burst = 1000; } /* xxx This should be more careful about only adding if it @@ -935,49 +1594,51 @@ netdev_linux_set_policing(struct netdev *netdev, return 0; } -/* If 'netdev' has an assigned IPv4 address, sets '*in4' to that address (if - * 'in4' is non-null) and returns true. Otherwise, returns false. */ static int -netdev_linux_get_in4(const struct netdev *netdev_, struct in_addr *in4) +netdev_linux_get_in4(const struct netdev *netdev_, + struct in_addr *address, struct in_addr *netmask) { - struct netdev_linux *netdev = netdev_linux_cast(netdev_); - if (!(netdev->cache->valid & VALID_IN4)) { - const struct sockaddr_in *sin; - struct ifreq ifr; + struct netdev_dev_linux *netdev_dev = + netdev_dev_linux_cast(netdev_get_dev(netdev_)); + + if (!(netdev_dev->cache_valid & VALID_IN4)) { int error; - ifr.ifr_addr.sa_family = AF_INET; - error = netdev_linux_do_ioctl(netdev_, &ifr, + error = netdev_linux_get_ipv4(netdev_, &netdev_dev->address, SIOCGIFADDR, "SIOCGIFADDR"); if (error) { return error; } - sin = (struct sockaddr_in *) &ifr.ifr_addr; - netdev->cache->in4 = sin->sin_addr; - netdev->cache->valid |= VALID_IN4; + error = netdev_linux_get_ipv4(netdev_, &netdev_dev->netmask, + SIOCGIFNETMASK, "SIOCGIFNETMASK"); + if (error) { + return error; + } + + netdev_dev->cache_valid |= VALID_IN4; } - *in4 = netdev->cache->in4; - return in4->s_addr == INADDR_ANY ? EADDRNOTAVAIL : 0; + *address = netdev_dev->address; + *netmask = netdev_dev->netmask; + return address->s_addr == INADDR_ANY ? EADDRNOTAVAIL : 0; } -/* 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_linux_set_in4(struct netdev *netdev_, struct in_addr addr, - struct in_addr mask) +netdev_linux_set_in4(struct netdev *netdev_, struct in_addr address, + struct in_addr netmask) { - struct netdev_linux *netdev = netdev_linux_cast(netdev_); + struct netdev_dev_linux *netdev_dev = + netdev_dev_linux_cast(netdev_get_dev(netdev_)); int error; - error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", addr); + error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", address); if (!error) { - netdev->cache->valid |= VALID_IN4; - netdev->cache->in4 = addr; - if (addr.s_addr != INADDR_ANY) { + netdev_dev->cache_valid |= VALID_IN4; + netdev_dev->address = address; + netdev_dev->netmask = netmask; + if (address.s_addr != INADDR_ANY) { error = do_set_addr(netdev_, SIOCSIFNETMASK, - "SIOCSIFNETMASK", mask); + "SIOCSIFNETMASK", netmask); } } return error; @@ -1004,12 +1665,13 @@ parse_if_inet6_line(const char *line, static int netdev_linux_get_in6(const struct netdev *netdev_, struct in6_addr *in6) { - struct netdev_linux *netdev = netdev_linux_cast(netdev_); - if (!(netdev->cache->valid & VALID_IN6)) { + struct netdev_dev_linux *netdev_dev = + netdev_dev_linux_cast(netdev_get_dev(netdev_)); + if (!(netdev_dev->cache_valid & VALID_IN6)) { FILE *file; char line[128]; - netdev->cache->in6 = in6addr_any; + netdev_dev->in6 = in6addr_any; file = fopen("/proc/net/if_inet6", "r"); if (file != NULL) { @@ -1020,15 +1682,15 @@ netdev_linux_get_in6(const struct netdev *netdev_, struct in6_addr *in6) if (parse_if_inet6_line(line, &in6, ifname) && !strcmp(name, ifname)) { - netdev->cache->in6 = in6; + netdev_dev->in6 = in6; break; } } fclose(file); } - netdev->cache->valid |= VALID_IN6; + netdev_dev->cache_valid |= VALID_IN6; } - *in6 = netdev->cache->in6; + *in6 = netdev_dev->in6; return 0; } @@ -1050,14 +1712,16 @@ do_set_addr(struct netdev *netdev, int ioctl_nr, const char *ioctl_name, struct in_addr addr) { struct ifreq ifr; - strncpy(ifr.ifr_name, netdev->name, sizeof ifr.ifr_name); + strncpy(ifr.ifr_name, netdev_get_name(netdev), sizeof ifr.ifr_name); make_in4_sockaddr(&ifr.ifr_addr, addr); - return netdev_linux_do_ioctl(netdev, &ifr, ioctl_nr, ioctl_name); + + return netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, ioctl_nr, + ioctl_name); } /* Adds 'router' as a default IP gateway. */ static int -netdev_linux_add_router(struct netdev *netdev UNUSED, struct in_addr router) +netdev_linux_add_router(struct netdev *netdev OVS_UNUSED, struct in_addr router) { struct in_addr any = { INADDR_ANY }; struct rtentry rt; @@ -1076,6 +1740,67 @@ netdev_linux_add_router(struct netdev *netdev UNUSED, struct in_addr router) return error; } +static int +netdev_linux_get_next_hop(const struct in_addr *host, struct in_addr *next_hop, + char **netdev_name) +{ + static const char fn[] = "/proc/net/route"; + FILE *stream; + char line[256]; + int ln; + + *netdev_name = NULL; + stream = fopen(fn, "r"); + if (stream == NULL) { + VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno)); + return errno; + } + + ln = 0; + while (fgets(line, sizeof line, stream)) { + if (++ln >= 2) { + char iface[17]; + uint32_t dest, gateway, mask; + int refcnt, metric, mtu; + unsigned int flags, use, window, irtt; + + if (sscanf(line, + "%16s %"SCNx32" %"SCNx32" %04X %d %u %d %"SCNx32 + " %d %u %u\n", + iface, &dest, &gateway, &flags, &refcnt, + &use, &metric, &mask, &mtu, &window, &irtt) != 11) { + + VLOG_WARN_RL(&rl, "%s: could not parse line %d: %s", + fn, ln, line); + continue; + } + if (!(flags & RTF_UP)) { + /* Skip routes that aren't up. */ + continue; + } + + /* The output of 'dest', 'mask', and 'gateway' were given in + * network byte order, so we don't need need any endian + * conversions here. */ + if ((dest & mask) == (host->s_addr & mask)) { + if (!gateway) { + /* The host is directly reachable. */ + next_hop->s_addr = 0; + } else { + /* To reach the host, we must go through a gateway. */ + next_hop->s_addr = gateway; + } + *netdev_name = xstrdup(iface); + fclose(stream); + return 0; + } + } + } + + fclose(stream); + return ENXIO; +} + /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be * successfully retrieved, it stores the corresponding MAC address in 'mac' and * returns 0. Otherwise, it returns a positive errno value; in particular, @@ -1085,24 +1810,24 @@ netdev_linux_arp_lookup(const struct netdev *netdev, uint32_t ip, uint8_t mac[ETH_ADDR_LEN]) { struct arpreq r; - struct sockaddr_in *pa; + struct sockaddr_in sin; int retval; memset(&r, 0, sizeof r); - pa = (struct sockaddr_in *) &r.arp_pa; - pa->sin_family = AF_INET; - pa->sin_addr.s_addr = ip; - pa->sin_port = 0; + sin.sin_family = AF_INET; + sin.sin_addr.s_addr = ip; + sin.sin_port = 0; + memcpy(&r.arp_pa, &sin, sizeof sin); r.arp_ha.sa_family = ARPHRD_ETHER; r.arp_flags = 0; - strncpy(r.arp_dev, netdev->name, sizeof r.arp_dev); + strncpy(r.arp_dev, netdev_get_name(netdev), sizeof r.arp_dev); COVERAGE_INC(netdev_arp_lookup); retval = ioctl(af_inet_sock, SIOCGARP, &r) < 0 ? errno : 0; if (!retval) { memcpy(mac, r.arp_ha.sa_data, ETH_ADDR_LEN); } else if (retval != ENXIO) { VLOG_WARN_RL(&rl, "%s: could not look up ARP entry for "IP_FMT": %s", - netdev->name, IP_ARGS(&ip), strerror(retval)); + netdev_get_name(netdev), IP_ARGS(&ip), strerror(retval)); } return retval; } @@ -1163,7 +1888,7 @@ poll_notify(struct list *list) static void netdev_linux_poll_cb(const struct rtnetlink_change *change, - void *aux UNUSED) + void *aux OVS_UNUSED) { if (change) { struct list *list = shash_find_data(&netdev_linux_notifiers, @@ -1235,13 +1960,16 @@ netdev_linux_poll_remove(struct netdev_notifier *notifier_) } const struct netdev_class netdev_linux_class = { - "", /* prefix */ - "linux", /* name */ + "system", netdev_linux_init, netdev_linux_run, netdev_linux_wait, + netdev_linux_create_system, + netdev_linux_destroy, + NULL, /* reconfigure */ + netdev_linux_open, netdev_linux_close, @@ -1257,6 +1985,7 @@ const struct netdev_class netdev_linux_class = { netdev_linux_set_etheraddr, netdev_linux_get_etheraddr, netdev_linux_get_mtu, + netdev_linux_get_ifindex, netdev_linux_get_carrier, netdev_linux_get_stats, @@ -1269,6 +1998,7 @@ const struct netdev_class netdev_linux_class = { netdev_linux_set_in4, netdev_linux_get_in6, netdev_linux_add_router, + netdev_linux_get_next_hop, netdev_linux_arp_lookup, netdev_linux_update_flags, @@ -1278,17 +2008,68 @@ const struct netdev_class netdev_linux_class = { }; const struct netdev_class netdev_tap_class = { - "tap", /* prefix */ - "tap", /* name */ + "tap", netdev_linux_init, - NULL, /* run */ - NULL, /* wait */ + netdev_linux_run, + netdev_linux_wait, + + netdev_linux_create_tap, + netdev_linux_destroy, + NULL, /* reconfigure */ netdev_linux_open, netdev_linux_close, - netdev_linux_enumerate, + NULL, /* enumerate */ + + netdev_linux_recv, + netdev_linux_recv_wait, + netdev_linux_drain, + + netdev_linux_send, + netdev_linux_send_wait, + + netdev_linux_set_etheraddr, + netdev_linux_get_etheraddr, + netdev_linux_get_mtu, + netdev_linux_get_ifindex, + netdev_linux_get_carrier, + netdev_linux_get_stats, + + netdev_linux_get_features, + netdev_linux_set_advertisements, + netdev_linux_get_vlan_vid, + netdev_linux_set_policing, + + netdev_linux_get_in4, + netdev_linux_set_in4, + netdev_linux_get_in6, + netdev_linux_add_router, + netdev_linux_get_next_hop, + netdev_linux_arp_lookup, + + netdev_linux_update_flags, + + netdev_linux_poll_add, + netdev_linux_poll_remove, +}; + +const struct netdev_class netdev_gre_class = { + "gre", + + netdev_linux_init, + netdev_linux_run, + netdev_linux_wait, + + netdev_linux_create_gre, + netdev_linux_destroy, + netdev_linux_reconfigure_gre, + + netdev_linux_open, + netdev_linux_close, + + NULL, /* enumerate */ netdev_linux_recv, netdev_linux_recv_wait, @@ -1300,6 +2081,7 @@ const struct netdev_class netdev_tap_class = { netdev_linux_set_etheraddr, netdev_linux_get_etheraddr, netdev_linux_get_mtu, + netdev_linux_get_ifindex, netdev_linux_get_carrier, netdev_linux_get_stats, @@ -1312,6 +2094,7 @@ const struct netdev_class netdev_tap_class = { netdev_linux_set_in4, netdev_linux_get_in6, netdev_linux_add_router, + netdev_linux_get_next_hop, netdev_linux_arp_lookup, netdev_linux_update_flags, @@ -1372,6 +2155,7 @@ get_stats_via_netlink(int ifindex, struct netdev_stats *stats) if (!attrs[IFLA_STATS]) { VLOG_WARN_RL(&rl, "RTM_GETLINK reply lacks stats"); + ofpbuf_delete(reply); return EPROTO; } @@ -1398,6 +2182,8 @@ get_stats_via_netlink(int ifindex, struct netdev_stats *stats) stats->tx_heartbeat_errors = rtnl_stats->tx_heartbeat_errors; stats->tx_window_errors = rtnl_stats->tx_window_errors; + ofpbuf_delete(reply); + return 0; } @@ -1464,7 +2250,8 @@ get_flags(const struct netdev *netdev, int *flags) struct ifreq ifr; int error; - error = netdev_linux_do_ioctl(netdev, &ifr, SIOCGIFFLAGS, "SIOCGIFFLAGS"); + error = netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, SIOCGIFFLAGS, + "SIOCGIFFLAGS"); *flags = ifr.ifr_flags; return error; } @@ -1475,7 +2262,8 @@ set_flags(struct netdev *netdev, int flags) struct ifreq ifr; ifr.ifr_flags = flags; - return netdev_linux_do_ioctl(netdev, &ifr, SIOCSIFFLAGS, "SIOCSIFFLAGS"); + return netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, SIOCSIFFLAGS, + "SIOCSIFFLAGS"); } static int @@ -1496,17 +2284,18 @@ do_get_ifindex(const char *netdev_name) static int get_ifindex(const struct netdev *netdev_, int *ifindexp) { - struct netdev_linux *netdev = netdev_linux_cast(netdev_); + struct netdev_dev_linux *netdev_dev = + netdev_dev_linux_cast(netdev_get_dev(netdev_)); *ifindexp = 0; - if (!(netdev->cache->valid & VALID_IFINDEX)) { + if (!(netdev_dev->cache_valid & VALID_IFINDEX)) { int ifindex = do_get_ifindex(netdev_get_name(netdev_)); if (ifindex < 0) { return -ifindex; } - netdev->cache->valid |= VALID_IFINDEX; - netdev->cache->ifindex = ifindex; + netdev_dev->cache_valid |= VALID_IFINDEX; + netdev_dev->ifindex = ifindex; } - *ifindexp = netdev->cache->ifindex; + *ifindexp = netdev_dev->ifindex; return 0; } @@ -1553,13 +2342,13 @@ set_etheraddr(const char *netdev_name, int hwaddr_family, } static int -netdev_linux_do_ethtool(struct netdev *netdev, struct ethtool_cmd *ecmd, +netdev_linux_do_ethtool(const char *name, struct ethtool_cmd *ecmd, int cmd, const char *cmd_name) { struct ifreq ifr; memset(&ifr, 0, sizeof ifr); - strncpy(ifr.ifr_name, netdev->name, sizeof ifr.ifr_name); + strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name); ifr.ifr_data = (caddr_t) ecmd; ecmd->cmd = cmd; @@ -1569,8 +2358,7 @@ netdev_linux_do_ethtool(struct netdev *netdev, struct ethtool_cmd *ecmd, } else { if (errno != EOPNOTSUPP) { VLOG_WARN_RL(&rl, "ethtool command %s on network device %s " - "failed: %s", cmd_name, netdev->name, - strerror(errno)); + "failed: %s", cmd_name, name, strerror(errno)); } else { /* The device doesn't support this operation. That's pretty * common, so there's no point in logging anything. */ @@ -1580,14 +2368,30 @@ netdev_linux_do_ethtool(struct netdev *netdev, struct ethtool_cmd *ecmd, } static int -netdev_linux_do_ioctl(const struct netdev *netdev, struct ifreq *ifr, - int cmd, const char *cmd_name) +netdev_linux_do_ioctl(const char *name, struct ifreq *ifr, int cmd, + const char *cmd_name) { - strncpy(ifr->ifr_name, netdev_get_name(netdev), sizeof ifr->ifr_name); + strncpy(ifr->ifr_name, name, sizeof ifr->ifr_name); if (ioctl(af_inet_sock, cmd, ifr) == -1) { - VLOG_DBG_RL(&rl, "%s: ioctl(%s) failed: %s", - netdev_get_name(netdev), cmd_name, strerror(errno)); + VLOG_DBG_RL(&rl, "%s: ioctl(%s) failed: %s", name, cmd_name, + strerror(errno)); return errno; } return 0; } + +static int +netdev_linux_get_ipv4(const struct netdev *netdev, struct in_addr *ip, + int cmd, const char *cmd_name) +{ + struct ifreq ifr; + int error; + + ifr.ifr_addr.sa_family = AF_INET; + error = netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, cmd, cmd_name); + if (!error) { + const struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr; + *ip = sin->sin_addr; + } + return error; +}