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-rw-r--r--src/plugins/linux-cp/lcp_interface.c1016
1 files changed, 1016 insertions, 0 deletions
diff --git a/src/plugins/linux-cp/lcp_interface.c b/src/plugins/linux-cp/lcp_interface.c
new file mode 100644
index 00000000000..534d974c7b0
--- /dev/null
+++ b/src/plugins/linux-cp/lcp_interface.c
@@ -0,0 +1,1016 @@
+/*
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * 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.
+ */
+
+#define _GNU_SOURCE
+#include <sched.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <sys/socket.h>
+#include <net/if.h>
+
+#include <linux-cp/lcp_interface.h>
+#include <netlink/route/link/vlan.h>
+
+#include <vnet/plugin/plugin.h>
+#include <vnet/plugin/plugin.h>
+
+#include <vnet/ip/ip_punt_drop.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/adj/adj_mcast.h>
+#include <vnet/udp/udp.h>
+#include <vnet/tcp/tcp.h>
+#include <vnet/devices/tap/tap.h>
+#include <vnet/devices/virtio/virtio.h>
+#include <vnet/devices/netlink.h>
+#include <vlibapi/api_helper_macros.h>
+#include <vnet/ipsec/ipsec_punt.h>
+
+static vlib_log_class_t lcp_itf_pair_logger;
+
+/**
+ * Pool of LIP objects
+ */
+lcp_itf_pair_t *lcp_itf_pair_pool;
+
+u32
+lcp_itf_num_pairs (void)
+{
+ return pool_elts (lcp_itf_pair_pool);
+}
+
+/**
+ * DBs of interface-pair objects:
+ * - key'd by VIF (linux ID)
+ * - key'd by VPP's physical interface
+ * - number of shared uses of VPP's tap/host interface
+ */
+static uword *lip_db_by_vif;
+index_t *lip_db_by_phy;
+u32 *lip_db_by_host;
+
+#define LCP_ITF_PAIR_DBG(...) \
+ vlib_log_notice (lcp_itf_pair_logger, __VA_ARGS__);
+
+#define LCP_ITF_PAIR_INFO(...) \
+ vlib_log_notice (lcp_itf_pair_logger, __VA_ARGS__);
+
+u8 *
+format_lcp_itf_pair (u8 *s, va_list *args)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ lcp_itf_pair_t *lip = va_arg (*args, lcp_itf_pair_t *);
+ vnet_sw_interface_t *swif_phy;
+ vnet_sw_interface_t *swif_host;
+
+ s = format (s, "itf-pair: [%d]", lip - lcp_itf_pair_pool);
+
+ swif_phy = vnet_get_sw_interface_or_null (vnm, lip->lip_phy_sw_if_index);
+ if (!swif_phy)
+ s = format (s, " <no-phy-if>");
+ else
+ s = format (s, " %U", format_vnet_sw_interface_name, vnm, swif_phy);
+
+ swif_host = vnet_get_sw_interface_or_null (vnm, lip->lip_host_sw_if_index);
+ if (!swif_host)
+ s = format (s, " <no-host-if>");
+ else
+ s = format (s, " %U", format_vnet_sw_interface_name, vnm, swif_host);
+
+ s = format (s, " %s %d type %s", lip->lip_host_name, lip->lip_vif_index,
+ (lip->lip_host_type == LCP_ITF_HOST_TAP) ? "tap" : "tun");
+
+ if (lip->lip_namespace)
+ s = format (s, " netns %s", lip->lip_namespace);
+
+ return s;
+}
+
+static walk_rc_t
+lcp_itf_pair_walk_show_cb (index_t api, void *ctx)
+{
+ vlib_main_t *vm;
+ lcp_itf_pair_t *lip;
+
+ lip = lcp_itf_pair_get (api);
+ if (!lip)
+ return WALK_STOP;
+
+ vm = vlib_get_main ();
+ vlib_cli_output (vm, "%U\n", format_lcp_itf_pair, lip);
+
+ return WALK_CONTINUE;
+}
+
+void
+lcp_itf_pair_show (u32 phy_sw_if_index)
+{
+ vlib_main_t *vm;
+ u8 *ns;
+ index_t api;
+
+ vm = vlib_get_main ();
+ ns = lcp_get_default_ns ();
+ vlib_cli_output (vm, "lcp default netns '%s'\n",
+ ns ? (char *) ns : "<unset>");
+
+ if (phy_sw_if_index == ~0)
+ {
+ lcp_itf_pair_walk (lcp_itf_pair_walk_show_cb, 0);
+ }
+ else
+ {
+ api = lcp_itf_pair_find_by_phy (phy_sw_if_index);
+ if (api != INDEX_INVALID)
+ lcp_itf_pair_walk_show_cb (api, 0);
+ }
+}
+
+lcp_itf_pair_t *
+lcp_itf_pair_get (u32 index)
+{
+ return pool_elt_at_index (lcp_itf_pair_pool, index);
+}
+
+index_t
+lcp_itf_pair_find_by_vif (u32 vif_index)
+{
+ uword *p;
+
+ p = hash_get (lip_db_by_vif, vif_index);
+
+ if (p)
+ return p[0];
+
+ return INDEX_INVALID;
+}
+
+int
+lcp_itf_pair_add_sub (u32 vif, u8 *host_if_name, u32 sub_sw_if_index,
+ u32 phy_sw_if_index, u8 *ns)
+{
+ lcp_itf_pair_t *lip;
+
+ lip = lcp_itf_pair_get (lcp_itf_pair_find_by_phy (phy_sw_if_index));
+
+ return lcp_itf_pair_add (lip->lip_host_sw_if_index, sub_sw_if_index,
+ host_if_name, vif, lip->lip_host_type, ns);
+}
+
+const char *lcp_itf_l3_feat_names[N_LCP_ITF_HOST][N_AF] = {
+ [LCP_ITF_HOST_TAP] = {
+ [AF_IP4] = "linux-cp-xc-ip4",
+ [AF_IP6] = "linux-cp-xc-ip6",
+ },
+ [LCP_ITF_HOST_TUN] = {
+ [AF_IP4] = "linux-cp-xc-l3-ip4",
+ [AF_IP6] = "linux-cp-xc-l3-ip6",
+ },
+};
+
+const fib_route_path_flags_t lcp_itf_route_path_flags[N_LCP_ITF_HOST] = {
+ [LCP_ITF_HOST_TAP] = FIB_ROUTE_PATH_DVR,
+ [LCP_ITF_HOST_TUN] = FIB_ROUTE_PATH_FLAG_NONE,
+};
+
+static void
+lcp_itf_unset_adjs (lcp_itf_pair_t *lip)
+{
+ adj_unlock (lip->lip_phy_adjs.adj_index[AF_IP4]);
+ adj_unlock (lip->lip_phy_adjs.adj_index[AF_IP6]);
+}
+
+static void
+lcp_itf_set_adjs (lcp_itf_pair_t *lip)
+{
+ if (lip->lip_host_type == LCP_ITF_HOST_TUN)
+ {
+ lip->lip_phy_adjs.adj_index[AF_IP4] = adj_nbr_add_or_lock (
+ FIB_PROTOCOL_IP4, VNET_LINK_IP4, &zero_addr, lip->lip_phy_sw_if_index);
+ lip->lip_phy_adjs.adj_index[AF_IP6] = adj_nbr_add_or_lock (
+ FIB_PROTOCOL_IP6, VNET_LINK_IP6, &zero_addr, lip->lip_phy_sw_if_index);
+ }
+ else
+ {
+ lip->lip_phy_adjs.adj_index[AF_IP4] = adj_mcast_add_or_lock (
+ FIB_PROTOCOL_IP4, VNET_LINK_IP4, lip->lip_phy_sw_if_index);
+ lip->lip_phy_adjs.adj_index[AF_IP6] = adj_mcast_add_or_lock (
+ FIB_PROTOCOL_IP6, VNET_LINK_IP6, lip->lip_phy_sw_if_index);
+ }
+
+ ip_adjacency_t *adj;
+
+ adj = adj_get (lip->lip_phy_adjs.adj_index[AF_IP4]);
+
+ lip->lip_rewrite_len = adj->rewrite_header.data_bytes;
+}
+
+int __clib_weak
+lcp_nl_drain_messages (void)
+{
+ return 0;
+}
+
+int
+lcp_itf_pair_add (u32 host_sw_if_index, u32 phy_sw_if_index, u8 *host_name,
+ u32 host_index, lip_host_type_t host_type, u8 *ns)
+{
+ index_t lipi;
+ lcp_itf_pair_t *lip;
+
+ lipi = lcp_itf_pair_find_by_phy (phy_sw_if_index);
+
+ LCP_ITF_PAIR_INFO ("add: host:%U phy:%U, host_if:%v vif:%d ns:%v",
+ format_vnet_sw_if_index_name, vnet_get_main (),
+ host_sw_if_index, format_vnet_sw_if_index_name,
+ vnet_get_main (), phy_sw_if_index, host_name, host_index,
+ ns);
+
+ if (lipi != INDEX_INVALID)
+ return VNET_API_ERROR_VALUE_EXIST;
+
+ /*
+ * Drain netlink messages before adding the new pair.
+ * This avoids unnecessarily applying messages that were generated by
+ * the creation of the tap/tun interface. By processing them before we
+ * store the pair data, we will ensure that they are ignored.
+ */
+ lcp_nl_drain_messages ();
+
+ /*
+ * Create a new pair.
+ */
+ pool_get (lcp_itf_pair_pool, lip);
+
+ lipi = lip - lcp_itf_pair_pool;
+
+ vec_validate_init_empty (lip_db_by_phy, phy_sw_if_index, INDEX_INVALID);
+ vec_validate_init_empty (lip_db_by_host, host_sw_if_index, INDEX_INVALID);
+ lip_db_by_phy[phy_sw_if_index] = lipi;
+ lip_db_by_host[host_sw_if_index] = lipi;
+ hash_set (lip_db_by_vif, host_index, lipi);
+
+ lip->lip_host_sw_if_index = host_sw_if_index;
+ lip->lip_phy_sw_if_index = phy_sw_if_index;
+ lip->lip_host_name = vec_dup (host_name);
+ lip->lip_host_type = host_type;
+ lip->lip_vif_index = host_index;
+ lip->lip_namespace = vec_dup (ns);
+ lip->lip_create_ts = vlib_time_now (vlib_get_main ());
+
+ if (lip->lip_host_sw_if_index == ~0)
+ return 0;
+
+ /*
+ * First use of this host interface.
+ * Enable the x-connect feature on the host to send
+ * all packets to the phy.
+ */
+ ip_address_family_t af;
+
+ FOR_EACH_IP_ADDRESS_FAMILY (af)
+ ip_feature_enable_disable (af, N_SAFI, IP_FEATURE_INPUT,
+ lcp_itf_l3_feat_names[lip->lip_host_type][af],
+ lip->lip_host_sw_if_index, 1, NULL, 0);
+
+ /*
+ * Configure passive punt to the host interface.
+ */
+ fib_route_path_t *rpaths = NULL, rpath = {
+ .frp_flags = lcp_itf_route_path_flags[lip->lip_host_type],
+ .frp_proto = DPO_PROTO_IP4,
+ .frp_sw_if_index = lip->lip_host_sw_if_index,
+ .frp_weight = 1,
+ .frp_fib_index = ~0,
+ };
+
+ vec_add1 (rpaths, rpath);
+
+ ip4_punt_redirect_add_paths (lip->lip_phy_sw_if_index, rpaths);
+
+ rpaths[0].frp_proto = DPO_PROTO_IP6;
+
+ ip6_punt_redirect_add_paths (lip->lip_phy_sw_if_index, rpaths);
+
+ vec_free (rpaths);
+
+ lcp_itf_set_adjs (lip);
+
+ /* enable ARP feature node for broadcast interfaces */
+ if (lip->lip_host_type != LCP_ITF_HOST_TUN)
+ {
+ vnet_feature_enable_disable ("arp", "linux-cp-arp-phy",
+ lip->lip_phy_sw_if_index, 1, NULL, 0);
+ vnet_feature_enable_disable ("arp", "linux-cp-arp-host",
+ lip->lip_host_sw_if_index, 1, NULL, 0);
+ }
+ else
+ {
+ vnet_feature_enable_disable ("ip4-punt", "linux-cp-punt-l3", 0, 1, NULL,
+ 0);
+ vnet_feature_enable_disable ("ip6-punt", "linux-cp-punt-l3", 0, 1, NULL,
+ 0);
+ }
+
+ return 0;
+}
+
+static clib_error_t *
+lcp_netlink_add_link_vlan (int parent, u32 vlan, const char *name)
+{
+ struct rtnl_link *link;
+ struct nl_sock *sk;
+ int err;
+
+ sk = nl_socket_alloc ();
+ if ((err = nl_connect (sk, NETLINK_ROUTE)) < 0)
+ return clib_error_return (NULL, "Unable to connect socket: %d", err);
+
+ link = rtnl_link_vlan_alloc ();
+
+ rtnl_link_set_link (link, parent);
+ rtnl_link_set_name (link, name);
+
+ rtnl_link_vlan_set_id (link, vlan);
+
+ if ((err = rtnl_link_add (sk, link, NLM_F_CREATE)) < 0)
+ return clib_error_return (NULL, "Unable to add link %s: %d", name, err);
+
+ rtnl_link_put (link);
+ nl_close (sk);
+
+ return NULL;
+}
+
+static clib_error_t *
+lcp_netlink_del_link (const char *name)
+{
+ struct rtnl_link *link;
+ struct nl_sock *sk;
+ int err;
+
+ sk = nl_socket_alloc ();
+ if ((err = nl_connect (sk, NETLINK_ROUTE)) < 0)
+ return clib_error_return (NULL, "Unable to connect socket: %d", err);
+
+ link = rtnl_link_alloc ();
+ rtnl_link_set_name (link, name);
+
+ if ((err = rtnl_link_delete (sk, link)) < 0)
+ return clib_error_return (NULL, "Unable to del link %s: %d", name, err);
+
+ rtnl_link_put (link);
+ nl_close (sk);
+
+ return NULL;
+}
+
+int
+lcp_itf_pair_del (u32 phy_sw_if_index)
+{
+ ip_address_family_t af;
+ lcp_itf_pair_t *lip;
+ u32 lipi;
+
+ lipi = lcp_itf_pair_find_by_phy (phy_sw_if_index);
+
+ if (lipi == INDEX_INVALID)
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ lip = lcp_itf_pair_get (lipi);
+
+ LCP_ITF_PAIR_INFO ("pair delete: {%U, %U, %s}", format_vnet_sw_if_index_name,
+ vnet_get_main (), lip->lip_phy_sw_if_index,
+ format_vnet_sw_if_index_name, vnet_get_main (),
+ lip->lip_host_sw_if_index, lip->lip_host_name);
+
+ FOR_EACH_IP_ADDRESS_FAMILY (af)
+ ip_feature_enable_disable (af, N_SAFI, IP_FEATURE_INPUT,
+ lcp_itf_l3_feat_names[lip->lip_host_type][af],
+ lip->lip_host_sw_if_index, 0, NULL, 0);
+
+ lcp_itf_unset_adjs (lip);
+
+ ip4_punt_redirect_del (lip->lip_phy_sw_if_index);
+ ip6_punt_redirect_del (lip->lip_phy_sw_if_index);
+
+ /* disable ARP feature node for broadcast interfaces */
+ if (lip->lip_host_type != LCP_ITF_HOST_TUN)
+ {
+ vnet_feature_enable_disable ("arp", "linux-cp-arp-phy",
+ lip->lip_phy_sw_if_index, 0, NULL, 0);
+ vnet_feature_enable_disable ("arp", "linux-cp-arp-host",
+ lip->lip_host_sw_if_index, 0, NULL, 0);
+ }
+ else
+ {
+ vnet_feature_enable_disable ("ip4-punt", "linux-cp-punt-l3", 0, 0, NULL,
+ 0);
+ vnet_feature_enable_disable ("ip6-punt", "linux-cp-punt-l3", 0, 0, NULL,
+ 0);
+ }
+
+ lip_db_by_phy[phy_sw_if_index] = INDEX_INVALID;
+ lip_db_by_phy[lip->lip_host_sw_if_index] = INDEX_INVALID;
+
+ vec_free (lip->lip_host_name);
+ vec_free (lip->lip_namespace);
+ pool_put (lcp_itf_pair_pool, lip);
+
+ return 0;
+}
+
+static void
+lcp_itf_pair_delete_by_index (index_t lipi)
+{
+ u32 host_sw_if_index;
+ lcp_itf_pair_t *lip;
+ u8 *host_name;
+
+ lip = lcp_itf_pair_get (lipi);
+
+ host_name = vec_dup (lip->lip_host_name);
+ host_sw_if_index = lip->lip_host_sw_if_index;
+
+ lcp_itf_pair_del (lip->lip_phy_sw_if_index);
+
+ if (vnet_sw_interface_is_sub (vnet_get_main (), host_sw_if_index))
+ {
+ lcp_netlink_del_link ((const char *) host_name);
+ vnet_delete_sub_interface (host_sw_if_index);
+ }
+ else
+ tap_delete_if (vlib_get_main (), host_sw_if_index);
+
+ vec_free (host_name);
+}
+
+int
+lcp_itf_pair_delete (u32 phy_sw_if_index)
+{
+ index_t lipi;
+
+ lipi = lcp_itf_pair_find_by_phy (phy_sw_if_index);
+
+ if (lipi == INDEX_INVALID)
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ lcp_itf_pair_delete_by_index (lipi);
+
+ return 0;
+}
+
+void
+lcp_itf_pair_walk (lcp_itf_pair_walk_cb_t cb, void *ctx)
+{
+ u32 api;
+
+ pool_foreach_index (api, lcp_itf_pair_pool)
+ {
+ if (!cb (api, ctx))
+ break;
+ };
+}
+
+typedef struct lcp_itf_pair_names_t_
+{
+ u8 *lipn_host_name;
+ u8 *lipn_phy_name;
+ u8 *lipn_namespace;
+ u32 lipn_phy_sw_if_index;
+} lcp_itf_pair_names_t;
+
+static lcp_itf_pair_names_t *lipn_names;
+
+static clib_error_t *
+lcp_itf_pair_config (vlib_main_t *vm, unformat_input_t *input)
+{
+ u8 *host, *phy;
+ u8 *ns;
+ u8 *default_ns;
+
+ host = phy = ns = default_ns = NULL;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ vec_reset_length (host);
+
+ if (unformat (input, "pair %s %s %s", &phy, &host, &ns))
+ {
+ lcp_itf_pair_names_t *lipn;
+
+ if (vec_len (ns) > LCP_NS_LEN)
+ {
+ return clib_error_return (0,
+ "linux-cp IF namespace must"
+ " be less than %d characters",
+ LCP_NS_LEN);
+ }
+
+ vec_add2 (lipn_names, lipn, 1);
+
+ lipn->lipn_host_name = vec_dup (host);
+ lipn->lipn_phy_name = vec_dup (phy);
+ lipn->lipn_namespace = vec_dup (ns);
+ }
+ else if (unformat (input, "pair %v %v", &phy, &host))
+ {
+ lcp_itf_pair_names_t *lipn;
+
+ vec_add2 (lipn_names, lipn, 1);
+
+ lipn->lipn_host_name = vec_dup (host);
+ lipn->lipn_phy_name = vec_dup (phy);
+ lipn->lipn_namespace = 0;
+ }
+ else if (unformat (input, "default netns %v", &default_ns))
+ {
+ vec_add1 (default_ns, 0);
+ if (lcp_set_default_ns (default_ns) < 0)
+ {
+ return clib_error_return (0,
+ "linux-cp default namespace must"
+ " be less than %d characters",
+ LCP_NS_LEN);
+ }
+ }
+ else if (unformat (input, "interface-auto-create"))
+ lcp_set_auto_intf (1 /* is_auto */);
+ else
+ return clib_error_return (0, "interfaces not found");
+ }
+
+ vec_free (host);
+ vec_free (phy);
+ vec_free (default_ns);
+
+ return NULL;
+}
+
+VLIB_EARLY_CONFIG_FUNCTION (lcp_itf_pair_config, "linux-cp");
+
+/*
+ * Returns 1 if the tap name is valid.
+ * Returns 0 if the tap name is invalid.
+ */
+static int
+lcp_validate_if_name (u8 *name)
+{
+ int len;
+ char *p;
+
+ p = (char *) name;
+ len = clib_strnlen (p, IFNAMSIZ);
+ if (len >= IFNAMSIZ)
+ return 0;
+
+ for (; *p; ++p)
+ {
+ if (isalnum (*p))
+ continue;
+
+ switch (*p)
+ {
+ case '-':
+ case '_':
+ case '%':
+ case '@':
+ case ':':
+ case '.':
+ continue;
+ }
+
+ return 0;
+ }
+
+ return 1;
+}
+
+static int
+lcp_itf_get_ns_fd (char *ns_name)
+{
+ char ns_path[256] = "/proc/self/ns/net";
+
+ if (ns_name)
+ snprintf (ns_path, sizeof (ns_path) - 1, "/var/run/netns/%s", ns_name);
+
+ return open (ns_path, O_RDONLY);
+}
+
+static void
+lcp_itf_set_vif_link_state (u32 vif_index, u8 up, u8 *ns)
+{
+ int curr_ns_fd, vif_ns_fd;
+
+ curr_ns_fd = vif_ns_fd = -1;
+
+ if (ns)
+ {
+ u8 *ns_path = 0;
+
+ curr_ns_fd = open ("/proc/self/ns/net", O_RDONLY);
+ ns_path = format (0, "/var/run/netns/%s%c", (char *) ns, 0);
+ vif_ns_fd = open ((char *) ns_path, O_RDONLY);
+ if (vif_ns_fd != -1)
+ setns (vif_ns_fd, CLONE_NEWNET);
+ }
+
+ vnet_netlink_set_link_state (vif_index, up);
+
+ if (vif_ns_fd != -1)
+ close (vif_ns_fd);
+
+ if (curr_ns_fd != -1)
+ {
+ setns (curr_ns_fd, CLONE_NEWNET);
+ close (curr_ns_fd);
+ }
+}
+
+int
+lcp_itf_pair_create (u32 phy_sw_if_index, u8 *host_if_name,
+ lip_host_type_t host_if_type, u8 *ns)
+{
+ vlib_main_t *vm;
+ vnet_main_t *vnm;
+ u32 vif_index = 0, host_sw_if_index;
+ const vnet_sw_interface_t *sw;
+ const vnet_hw_interface_t *hw;
+
+ if (!vnet_sw_if_index_is_api_valid (phy_sw_if_index))
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ if (!lcp_validate_if_name (host_if_name))
+ return VNET_API_ERROR_INVALID_ARGUMENT;
+
+ vnm = vnet_get_main ();
+ sw = vnet_get_sw_interface (vnm, phy_sw_if_index);
+ hw = vnet_get_sup_hw_interface (vnm, phy_sw_if_index);
+
+ /*
+ * Use interface-specific netns if supplied.
+ * Otherwise, use default netns if defined.
+ * Otherwise ignore a netns and use the OS default.
+ */
+ if (ns == 0 || ns[0] == 0)
+ ns = lcp_get_default_ns ();
+
+ /* sub interfaces do not need a tap created */
+ if (vnet_sw_interface_is_sub (vnm, phy_sw_if_index))
+ {
+ const lcp_itf_pair_t *lip;
+ int orig_ns_fd, ns_fd;
+ clib_error_t *err;
+ u16 vlan;
+
+ /*
+ * Find the parent tap by finding the pair from the parent phy
+ */
+ lip = lcp_itf_pair_get (lcp_itf_pair_find_by_phy (sw->sup_sw_if_index));
+ vlan = sw->sub.eth.outer_vlan_id;
+
+ /*
+ * see if the requested host interface has already been created
+ */
+ orig_ns_fd = ns_fd = -1;
+ err = NULL;
+
+ if (ns && ns[0] != 0)
+ {
+ orig_ns_fd = lcp_itf_get_ns_fd (NULL);
+ ns_fd = lcp_itf_get_ns_fd ((char *) ns);
+ if (orig_ns_fd == -1 || ns_fd == -1)
+ goto socket_close;
+
+ setns (ns_fd, CLONE_NEWNET);
+ }
+
+ vif_index = if_nametoindex ((const char *) host_if_name);
+
+ if (!vif_index)
+ {
+ /*
+ * no existing host interface, create it now
+ */
+ err = lcp_netlink_add_link_vlan (lip->lip_vif_index, vlan,
+ (const char *) host_if_name);
+
+ if (!err && -1 != ns_fd)
+ err = vnet_netlink_set_link_netns (vif_index, ns_fd, NULL);
+
+ if (!err)
+ vif_index = if_nametoindex ((char *) host_if_name);
+ }
+
+ /*
+ * create a sub-interface on the tap
+ */
+ if (!err && vnet_create_sub_interface (lip->lip_host_sw_if_index,
+ sw->sub.id, sw->sub.eth.raw_flags,
+ sw->sub.eth.inner_vlan_id, vlan,
+ &host_sw_if_index))
+ LCP_ITF_PAIR_INFO ("failed create vlan: %d on %U", vlan,
+ format_vnet_sw_if_index_name, vnet_get_main (),
+ lip->lip_host_sw_if_index);
+
+ socket_close:
+ if (orig_ns_fd != -1)
+ {
+ setns (orig_ns_fd, CLONE_NEWNET);
+ close (orig_ns_fd);
+ }
+ if (ns_fd != -1)
+ close (ns_fd);
+
+ if (err)
+ return VNET_API_ERROR_INVALID_ARGUMENT;
+ }
+ else
+ {
+ tap_create_if_args_t args = {
+ .num_rx_queues = clib_max (1, vlib_num_workers ()),
+ .id = hw->hw_if_index,
+ .sw_if_index = ~0,
+ .rx_ring_sz = 256,
+ .tx_ring_sz = 256,
+ .host_if_name = host_if_name,
+ .host_namespace = 0,
+ };
+ ethernet_interface_t *ei;
+
+ if (host_if_type == LCP_ITF_HOST_TUN)
+ args.tap_flags |= TAP_FLAG_TUN;
+ else
+ {
+ ei = pool_elt_at_index (ethernet_main.interfaces, hw->hw_instance);
+ mac_address_copy (&args.host_mac_addr, &ei->address.mac);
+ }
+
+ if (sw->mtu[VNET_MTU_L3])
+ {
+ args.host_mtu_set = 1;
+ args.host_mtu_size = sw->mtu[VNET_MTU_L3];
+ }
+
+ if (ns && ns[0] != 0)
+ args.host_namespace = ns;
+
+ vm = vlib_get_main ();
+ tap_create_if (vm, &args);
+
+ if (args.rv < 0)
+ {
+ return args.rv;
+ }
+
+ /*
+ * get the hw and ethernet of the tap
+ */
+ hw = vnet_get_sup_hw_interface (vnm, args.sw_if_index);
+
+ /*
+ * Set the interface down on the host side.
+ * This controls whether the host can RX/TX.
+ */
+ virtio_main_t *mm = &virtio_main;
+ virtio_if_t *vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
+
+ lcp_itf_set_vif_link_state (vif->ifindex, 0 /* down */,
+ args.host_namespace);
+
+ /*
+ * Leave the TAP permanently up on the VPP side.
+ * This TAP will be shared by many sub-interface.
+ * Therefore we can't use it to manage admin state.
+ * force the tap in promiscuous mode.
+ */
+ if (host_if_type == LCP_ITF_HOST_TAP)
+ {
+ ei = pool_elt_at_index (ethernet_main.interfaces, hw->hw_instance);
+ ei->flags |= ETHERNET_INTERFACE_FLAG_STATUS_L3;
+ }
+
+ vif_index = vif->ifindex;
+ host_sw_if_index = args.sw_if_index;
+ }
+
+ if (!vif_index)
+ {
+ LCP_ITF_PAIR_INFO ("failed pair add (no vif index): {%U, %U, %s}",
+ format_vnet_sw_if_index_name, vnet_get_main (),
+ phy_sw_if_index, format_vnet_sw_if_index_name,
+ vnet_get_main (), host_sw_if_index, host_if_name);
+ return -1;
+ }
+
+ vnet_sw_interface_admin_up (vnm, host_sw_if_index);
+ lcp_itf_pair_add (host_sw_if_index, phy_sw_if_index, host_if_name, vif_index,
+ host_if_type, ns);
+
+ LCP_ITF_PAIR_INFO ("pair create: {%U, %U, %s}", format_vnet_sw_if_index_name,
+ vnet_get_main (), phy_sw_if_index,
+ format_vnet_sw_if_index_name, vnet_get_main (),
+ host_sw_if_index, host_if_name);
+
+ return 0;
+}
+
+static walk_rc_t
+lcp_itf_pair_walk_mark (index_t lipi, void *ctx)
+{
+ lcp_itf_pair_t *lip;
+
+ lip = lcp_itf_pair_get (lipi);
+
+ lip->lip_flags |= LIP_FLAG_STALE;
+
+ return (WALK_CONTINUE);
+}
+
+int
+lcp_itf_pair_replace_begin (void)
+{
+ lcp_itf_pair_walk (lcp_itf_pair_walk_mark, NULL);
+
+ return (0);
+}
+
+typedef struct lcp_itf_pair_sweep_ctx_t_
+{
+ index_t *indicies;
+} lcp_itf_pair_sweep_ctx_t;
+
+static walk_rc_t
+lcp_itf_pair_walk_sweep (index_t lipi, void *arg)
+{
+ lcp_itf_pair_sweep_ctx_t *ctx = arg;
+ lcp_itf_pair_t *lip;
+
+ lip = lcp_itf_pair_get (lipi);
+
+ if (lip->lip_flags & LIP_FLAG_STALE)
+ vec_add1 (ctx->indicies, lipi);
+
+ return (WALK_CONTINUE);
+}
+
+int
+lcp_itf_pair_replace_end (void)
+{
+ lcp_itf_pair_sweep_ctx_t ctx = {
+ .indicies = NULL,
+ };
+ index_t *lipi;
+
+ lcp_itf_pair_walk (lcp_itf_pair_walk_sweep, &ctx);
+
+ vec_foreach (lipi, ctx.indicies)
+ lcp_itf_pair_delete_by_index (*lipi);
+
+ vec_free (ctx.indicies);
+ return (0);
+}
+
+static uword
+lcp_itf_pair_process (vlib_main_t *vm, vlib_node_runtime_t *rt,
+ vlib_frame_t *f)
+{
+ uword *event_data = 0;
+ uword *lipn_index;
+
+ while (1)
+ {
+ vlib_process_wait_for_event (vm);
+
+ vlib_process_get_events (vm, &event_data);
+
+ vec_foreach (lipn_index, event_data)
+ {
+ lcp_itf_pair_names_t *lipn;
+
+ lipn = &lipn_names[*lipn_index];
+ lcp_itf_pair_create (lipn->lipn_phy_sw_if_index,
+ lipn->lipn_host_name, LCP_ITF_HOST_TAP,
+ lipn->lipn_namespace);
+ }
+
+ vec_reset_length (event_data);
+ }
+
+ return 0;
+}
+
+VLIB_REGISTER_NODE (lcp_itf_pair_process_node, static) = {
+ .function = lcp_itf_pair_process,
+ .name = "linux-cp-itf-process",
+ .type = VLIB_NODE_TYPE_PROCESS,
+};
+
+static clib_error_t *
+lcp_itf_phy_add (vnet_main_t *vnm, u32 sw_if_index, u32 is_create)
+{
+ lcp_itf_pair_names_t *lipn;
+ vlib_main_t *vm = vlib_get_main ();
+ vnet_hw_interface_t *hw;
+
+ if (!is_create || vnet_sw_interface_is_sub (vnm, sw_if_index))
+ return NULL;
+
+ hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
+
+ vec_foreach (lipn, lipn_names)
+ {
+ if (!vec_cmp (hw->name, lipn->lipn_phy_name))
+ {
+ lipn->lipn_phy_sw_if_index = sw_if_index;
+
+ vlib_process_signal_event (vm, lcp_itf_pair_process_node.index, 0,
+ lipn - lipn_names);
+ break;
+ }
+ }
+
+ return NULL;
+}
+
+VNET_SW_INTERFACE_ADD_DEL_FUNCTION (lcp_itf_phy_add);
+
+static clib_error_t *
+lcp_itf_pair_link_up_down (vnet_main_t *vnm, u32 hw_if_index, u32 flags)
+{
+ vnet_hw_interface_t *hi;
+ vnet_sw_interface_t *si;
+ index_t lipi;
+ lcp_itf_pair_t *lip;
+
+ hi = vnet_get_hw_interface_or_null (vnm, hw_if_index);
+ if (!hi)
+ return 0;
+
+ lipi = lcp_itf_pair_find_by_phy (hi->sw_if_index);
+ if (lipi == INDEX_INVALID)
+ return 0;
+
+ lip = lcp_itf_pair_get (lipi);
+ si = vnet_get_sw_interface_or_null (vnm, lip->lip_host_sw_if_index);
+ if (!si)
+ return 0;
+
+ if (!lcp_main.test_mode)
+ {
+ tap_set_carrier (si->hw_if_index,
+ (flags & VNET_HW_INTERFACE_FLAG_LINK_UP));
+
+ if (flags & VNET_HW_INTERFACE_FLAG_LINK_UP)
+ {
+ tap_set_speed (si->hw_if_index, hi->link_speed / 1000);
+ }
+ }
+
+ return 0;
+}
+
+VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION (lcp_itf_pair_link_up_down);
+
+static clib_error_t *
+lcp_itf_pair_init (vlib_main_t *vm)
+{
+ vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("linux-cp");
+
+ /* punt IKE */
+ vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
+ "linux-cp-punt");
+
+ /* punt all unknown ports */
+ udp_punt_unknown (vm, 0, 1);
+ udp_punt_unknown (vm, 1, 1);
+ tcp_punt_unknown (vm, 0, 1);
+ tcp_punt_unknown (vm, 1, 1);
+
+ lcp_itf_pair_logger = vlib_log_register_class ("linux-cp", "itf");
+
+ return NULL;
+}
+
+VLIB_INIT_FUNCTION (lcp_itf_pair_init) = {
+ .runs_after = VLIB_INITS ("vnet_interface_init", "tcp_init", "udp_init"),
+};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */