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-rw-r--r--src/vnet/ethernet/interface.c730
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diff --git a/src/vnet/ethernet/interface.c b/src/vnet/ethernet/interface.c
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+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ * ethernet_interface.c: ethernet interfaces
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/pg/pg.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/l2/l2_input.h>
+#include <vnet/adj/adj.h>
+
+/**
+ * @file
+ * @brief Loopback Interfaces.
+ *
+ * This file contains code to manage loopback interfaces.
+ */
+
+/**
+ * @brief build a rewrite string to use for sending packets of type 'link_type'
+ * to 'dst_address'
+ */
+u8 *
+ethernet_build_rewrite (vnet_main_t * vnm,
+ u32 sw_if_index,
+ vnet_link_t link_type, const void *dst_address)
+{
+ vnet_sw_interface_t *sub_sw = vnet_get_sw_interface (vnm, sw_if_index);
+ vnet_sw_interface_t *sup_sw = vnet_get_sup_sw_interface (vnm, sw_if_index);
+ vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
+ ethernet_main_t *em = &ethernet_main;
+ ethernet_interface_t *ei;
+ ethernet_header_t *h;
+ ethernet_type_t type;
+ uword n_bytes = sizeof (h[0]);
+ u8 *rewrite = NULL;
+
+ if (sub_sw != sup_sw)
+ {
+ if (sub_sw->sub.eth.flags.one_tag)
+ {
+ n_bytes += sizeof (ethernet_vlan_header_t);
+ }
+ else if (sub_sw->sub.eth.flags.two_tags)
+ {
+ n_bytes += 2 * (sizeof (ethernet_vlan_header_t));
+ }
+ // Check for encaps that are not supported for L3 interfaces
+ if (!(sub_sw->sub.eth.flags.exact_match) ||
+ (sub_sw->sub.eth.flags.default_sub) ||
+ (sub_sw->sub.eth.flags.outer_vlan_id_any) ||
+ (sub_sw->sub.eth.flags.inner_vlan_id_any))
+ {
+ return 0;
+ }
+ }
+
+ switch (link_type)
+ {
+#define _(a,b) case VNET_LINK_##a: type = ETHERNET_TYPE_##b; break
+ _(IP4, IP4);
+ _(IP6, IP6);
+ _(MPLS, MPLS_UNICAST);
+ _(ARP, ARP);
+#undef _
+ default:
+ return NULL;
+ }
+
+ vec_validate (rewrite, n_bytes - 1);
+ h = (ethernet_header_t *) rewrite;
+ ei = pool_elt_at_index (em->interfaces, hw->hw_instance);
+ clib_memcpy (h->src_address, ei->address, sizeof (h->src_address));
+ if (dst_address)
+ clib_memcpy (h->dst_address, dst_address, sizeof (h->dst_address));
+ else
+ memset (h->dst_address, ~0, sizeof (h->dst_address)); /* broadcast */
+
+ if (sub_sw->sub.eth.flags.one_tag)
+ {
+ ethernet_vlan_header_t *outer = (void *) (h + 1);
+
+ h->type = sub_sw->sub.eth.flags.dot1ad ?
+ clib_host_to_net_u16 (ETHERNET_TYPE_DOT1AD) :
+ clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
+ outer->priority_cfi_and_id =
+ clib_host_to_net_u16 (sub_sw->sub.eth.outer_vlan_id);
+ outer->type = clib_host_to_net_u16 (type);
+
+ }
+ else if (sub_sw->sub.eth.flags.two_tags)
+ {
+ ethernet_vlan_header_t *outer = (void *) (h + 1);
+ ethernet_vlan_header_t *inner = (void *) (outer + 1);
+
+ h->type = sub_sw->sub.eth.flags.dot1ad ?
+ clib_host_to_net_u16 (ETHERNET_TYPE_DOT1AD) :
+ clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
+ outer->priority_cfi_and_id =
+ clib_host_to_net_u16 (sub_sw->sub.eth.outer_vlan_id);
+ outer->type = clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
+ inner->priority_cfi_and_id =
+ clib_host_to_net_u16 (sub_sw->sub.eth.inner_vlan_id);
+ inner->type = clib_host_to_net_u16 (type);
+
+ }
+ else
+ {
+ h->type = clib_host_to_net_u16 (type);
+ }
+
+ return (rewrite);
+}
+
+void
+ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
+{
+ ip_adjacency_t *adj;
+
+ adj = adj_get (ai);
+
+ if (FIB_PROTOCOL_IP4 == adj->ia_nh_proto)
+ {
+ arp_update_adjacency (vnm, sw_if_index, ai);
+ }
+ else if (FIB_PROTOCOL_IP6 == adj->ia_nh_proto)
+ {
+ ip6_ethernet_update_adjacency (vnm, sw_if_index, ai);
+ }
+ else
+ {
+ ASSERT (0);
+ }
+}
+
+static clib_error_t *
+ethernet_mac_change (vnet_hw_interface_t * hi, char *mac_address)
+{
+ ethernet_interface_t *ei;
+ ethernet_main_t *em;
+
+ em = &ethernet_main;
+ ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
+
+ vec_validate (hi->hw_address,
+ STRUCT_SIZE_OF (ethernet_header_t, src_address) - 1);
+ clib_memcpy (hi->hw_address, mac_address, vec_len (hi->hw_address));
+
+ clib_memcpy (ei->address, (u8 *) mac_address, sizeof (ei->address));
+ ethernet_arp_change_mac (hi->sw_if_index);
+ ethernet_ndp_change_mac (hi->sw_if_index);
+
+ return (NULL);
+}
+
+/* *INDENT-OFF* */
+VNET_HW_INTERFACE_CLASS (ethernet_hw_interface_class) = {
+ .name = "Ethernet",
+ .format_address = format_ethernet_address,
+ .format_header = format_ethernet_header_with_length,
+ .unformat_hw_address = unformat_ethernet_address,
+ .unformat_header = unformat_ethernet_header,
+ .build_rewrite = ethernet_build_rewrite,
+ .update_adjacency = ethernet_update_adjacency,
+ .mac_addr_change_function = ethernet_mac_change,
+};
+/* *INDENT-ON* */
+
+uword
+unformat_ethernet_interface (unformat_input_t * input, va_list * args)
+{
+ vnet_main_t *vnm = va_arg (*args, vnet_main_t *);
+ u32 *result = va_arg (*args, u32 *);
+ u32 hw_if_index;
+ ethernet_main_t *em = &ethernet_main;
+ ethernet_interface_t *eif;
+
+ if (!unformat_user (input, unformat_vnet_hw_interface, vnm, &hw_if_index))
+ return 0;
+
+ eif = ethernet_get_interface (em, hw_if_index);
+ if (eif)
+ {
+ *result = hw_if_index;
+ return 1;
+ }
+ return 0;
+}
+
+clib_error_t *
+ethernet_register_interface (vnet_main_t * vnm,
+ u32 dev_class_index,
+ u32 dev_instance,
+ u8 * address,
+ u32 * hw_if_index_return,
+ ethernet_flag_change_function_t flag_change)
+{
+ ethernet_main_t *em = &ethernet_main;
+ ethernet_interface_t *ei;
+ vnet_hw_interface_t *hi;
+ clib_error_t *error = 0;
+ u32 hw_if_index;
+
+ pool_get (em->interfaces, ei);
+ ei->flag_change = flag_change;
+
+ hw_if_index = vnet_register_interface
+ (vnm,
+ dev_class_index, dev_instance,
+ ethernet_hw_interface_class.index, ei - em->interfaces);
+ *hw_if_index_return = hw_if_index;
+
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+
+ ethernet_setup_node (vnm->vlib_main, hi->output_node_index);
+
+ hi->min_packet_bytes = hi->min_supported_packet_bytes =
+ ETHERNET_MIN_PACKET_BYTES;
+ hi->max_packet_bytes = hi->max_supported_packet_bytes =
+ ETHERNET_MAX_PACKET_BYTES;
+ hi->per_packet_overhead_bytes =
+ /* preamble */ 8 + /* inter frame gap */ 12;
+
+ /* Standard default ethernet MTU. */
+ hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] = 9000;
+
+ clib_memcpy (ei->address, address, sizeof (ei->address));
+ vec_free (hi->hw_address);
+ vec_add (hi->hw_address, address, sizeof (ei->address));
+
+ if (error)
+ {
+ pool_put (em->interfaces, ei);
+ return error;
+ }
+ return error;
+}
+
+void
+ethernet_delete_interface (vnet_main_t * vnm, u32 hw_if_index)
+{
+ ethernet_main_t *em = &ethernet_main;
+ ethernet_interface_t *ei;
+ vnet_hw_interface_t *hi;
+ main_intf_t *main_intf;
+ vlan_table_t *vlan_table;
+ u32 idx;
+
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+ ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
+
+ /* Delete vlan mapping table for dot1q and dot1ad. */
+ main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
+ if (main_intf->dot1q_vlans)
+ {
+ vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
+ for (idx = 0; idx < ETHERNET_N_VLAN; idx++)
+ {
+ if (vlan_table->vlans[idx].qinqs)
+ {
+ pool_put_index (em->qinq_pool, vlan_table->vlans[idx].qinqs);
+ }
+ }
+ pool_put_index (em->vlan_pool, main_intf->dot1q_vlans);
+ }
+ if (main_intf->dot1ad_vlans)
+ {
+ vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
+ for (idx = 0; idx < ETHERNET_N_VLAN; idx++)
+ {
+ if (vlan_table->vlans[idx].qinqs)
+ {
+ pool_put_index (em->qinq_pool, vlan_table->vlans[idx].qinqs);
+ }
+ }
+ pool_put_index (em->vlan_pool, main_intf->dot1ad_vlans);
+ }
+
+ vnet_delete_hw_interface (vnm, hw_if_index);
+ pool_put (em->interfaces, ei);
+}
+
+u32
+ethernet_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
+{
+ ethernet_main_t *em = &ethernet_main;
+ vnet_hw_interface_t *hi;
+ ethernet_interface_t *ei;
+
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+
+ ASSERT (hi->hw_class_index == ethernet_hw_interface_class.index);
+
+ ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
+ if (ei->flag_change)
+ return ei->flag_change (vnm, hi, flags);
+ return (u32) ~ 0;
+}
+
+/* Echo packets back to ethernet/l2-input. */
+static uword
+simulated_ethernet_interface_tx (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_left_from, n_left_to_next, n_copy, *from, *to_next;
+ u32 next_index = VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT;
+ u32 i, next_node_index, bvi_flag, sw_if_index;
+ u32 n_pkts = 0, n_bytes = 0;
+ u32 cpu_index = vm->cpu_index;
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_interface_main_t *im = &vnm->interface_main;
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_node_t *loop_node;
+ vlib_buffer_t *b;
+
+ // check tx node index, it is ethernet-input on loopback create
+ // but can be changed to l2-input if loopback is configured as
+ // BVI of a BD (Bridge Domain).
+ loop_node = vec_elt (nm->nodes, node->node_index);
+ next_node_index = loop_node->next_nodes[next_index];
+ bvi_flag = (next_node_index == l2input_node.index) ? 1 : 0;
+
+ n_left_from = frame->n_vectors;
+ from = vlib_frame_args (frame);
+
+ while (n_left_from > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ n_copy = clib_min (n_left_from, n_left_to_next);
+
+ clib_memcpy (to_next, from, n_copy * sizeof (from[0]));
+ n_left_to_next -= n_copy;
+ n_left_from -= n_copy;
+ i = 0;
+ b = vlib_get_buffer (vm, from[i]);
+ sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_TX];
+ while (1)
+ {
+ // Set up RX and TX indices as if received from a real driver
+ // unless loopback is used as a BVI. For BVI case, leave TX index
+ // and update l2_len in packet as required for l2 forwarding path
+ vnet_buffer (b)->sw_if_index[VLIB_RX] = sw_if_index;
+ if (bvi_flag)
+ {
+ vnet_update_l2_len (b);
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = L2INPUT_BVI;
+ }
+ else
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+
+ i++;
+ n_pkts++;
+ n_bytes += vlib_buffer_length_in_chain (vm, b);
+
+ if (i < n_copy)
+ b = vlib_get_buffer (vm, from[i]);
+ else
+ break;
+ }
+ from += n_copy;
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+
+ /* increment TX interface stat */
+ vlib_increment_combined_counter (im->combined_sw_if_counters +
+ VNET_INTERFACE_COUNTER_TX, cpu_index,
+ sw_if_index, n_pkts, n_bytes);
+ }
+
+ return n_left_from;
+}
+
+static u8 *
+format_simulated_ethernet_name (u8 * s, va_list * args)
+{
+ u32 dev_instance = va_arg (*args, u32);
+ return format (s, "loop%d", dev_instance);
+}
+
+static clib_error_t *
+simulated_ethernet_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
+ u32 flags)
+{
+ u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
+ VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
+ vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VNET_DEVICE_CLASS (ethernet_simulated_device_class) = {
+ .name = "Loopback",
+ .format_device_name = format_simulated_ethernet_name,
+ .tx_function = simulated_ethernet_interface_tx,
+ .admin_up_down_function = simulated_ethernet_admin_up_down,
+};
+/* *INDENT-ON* */
+
+int
+vnet_create_loopback_interface (u32 * sw_if_indexp, u8 * mac_address)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vlib_main_t *vm = vlib_get_main ();
+ clib_error_t *error;
+ static u32 instance;
+ u8 address[6];
+ u32 hw_if_index;
+ vnet_hw_interface_t *hw_if;
+ u32 slot;
+ int rv = 0;
+
+ ASSERT (sw_if_indexp);
+
+ *sw_if_indexp = (u32) ~ 0;
+
+ memset (address, 0, sizeof (address));
+
+ /*
+ * Default MAC address (dead:0000:0000 + instance) is allocated
+ * if zero mac_address is configured. Otherwise, user-configurable MAC
+ * address is programmed on the loopback interface.
+ */
+ if (memcmp (address, mac_address, sizeof (address)))
+ clib_memcpy (address, mac_address, sizeof (address));
+ else
+ {
+ address[0] = 0xde;
+ address[1] = 0xad;
+ address[5] = instance;
+ }
+
+ error = ethernet_register_interface
+ (vnm,
+ ethernet_simulated_device_class.index, instance++, address, &hw_if_index,
+ /* flag change */ 0);
+
+ if (error)
+ {
+ rv = VNET_API_ERROR_INVALID_REGISTRATION;
+ clib_error_report (error);
+ return rv;
+ }
+
+ hw_if = vnet_get_hw_interface (vnm, hw_if_index);
+ slot = vlib_node_add_named_next_with_slot
+ (vm, hw_if->tx_node_index,
+ "ethernet-input", VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
+ ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
+
+ {
+ vnet_sw_interface_t *si = vnet_get_hw_sw_interface (vnm, hw_if_index);
+ *sw_if_indexp = si->sw_if_index;
+ }
+
+ return 0;
+}
+
+static clib_error_t *
+create_simulated_ethernet_interfaces (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ int rv;
+ u32 sw_if_index;
+ u8 mac_address[6];
+
+ memset (mac_address, 0, sizeof (mac_address));
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "mac %U", unformat_ethernet_address, mac_address))
+ ;
+ else
+ break;
+ }
+
+ rv = vnet_create_loopback_interface (&sw_if_index, mac_address);
+
+ if (rv)
+ return clib_error_return (0, "vnet_create_loopback_interface failed");
+
+ vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
+ sw_if_index);
+ return 0;
+}
+
+/*?
+ * Create a loopback interface. Optionally, a MAC Address can be
+ * provided. If not provided, de:ad:00:00:00:<loopId> will be used.
+ *
+ * @cliexpar
+ * The following two command syntaxes are equivalent:
+ * @cliexcmd{loopback create-interface [mac <mac-addr>]}
+ * @cliexcmd{create loopback interface [mac <mac-addr>]}
+ * Example of how to create a loopback interface:
+ * @cliexcmd{loopback create-interface}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (create_simulated_ethernet_interface_command, static) = {
+ .path = "loopback create-interface",
+ .short_help = "loopback create-interface [mac <mac-addr>]",
+ .function = create_simulated_ethernet_interfaces,
+};
+/* *INDENT-ON* */
+
+/*?
+ * Create a loopback interface. Optionally, a MAC Address can be
+ * provided. If not provided, de:ad:00:00:00:<loopId> will be used.
+ *
+ * @cliexpar
+ * The following two command syntaxes are equivalent:
+ * @cliexcmd{loopback create-interface [mac <mac-addr>]}
+ * @cliexcmd{create loopback interface [mac <mac-addr>]}
+ * Example of how to create a loopback interface:
+ * @cliexcmd{create loopback interface}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (create_loopback_interface_command, static) = {
+ .path = "create loopback interface",
+ .short_help = "create loopback interface [mac <mac-addr>]",
+ .function = create_simulated_ethernet_interfaces,
+};
+/* *INDENT-ON* */
+
+ethernet_interface_t *
+ethernet_get_interface (ethernet_main_t * em, u32 hw_if_index)
+{
+ vnet_hw_interface_t *i =
+ vnet_get_hw_interface (vnet_get_main (), hw_if_index);
+ return (i->hw_class_index ==
+ ethernet_hw_interface_class.
+ index ? pool_elt_at_index (em->interfaces, i->hw_instance) : 0);
+}
+
+int
+vnet_delete_loopback_interface (u32 sw_if_index)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_sw_interface_t *si;
+
+ if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ si = vnet_get_sw_interface (vnm, sw_if_index);
+ ethernet_delete_interface (vnm, si->hw_if_index);
+
+ return 0;
+}
+
+int
+vnet_delete_sub_interface (u32 sw_if_index)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ int rv = 0;
+
+ if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+
+ vnet_interface_main_t *im = &vnm->interface_main;
+ vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
+
+ if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
+ {
+ vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
+ u64 sup_and_sub_key =
+ ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
+
+ hash_unset_mem (im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
+ vnet_delete_sw_interface (vnm, sw_if_index);
+ }
+ else
+ {
+ rv = VNET_API_ERROR_INVALID_SUB_SW_IF_INDEX;
+ }
+ return rv;
+}
+
+static clib_error_t *
+delete_simulated_ethernet_interfaces (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ int rv;
+ u32 sw_if_index = ~0;
+ vnet_main_t *vnm = vnet_get_main ();
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "intfc %U",
+ unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else
+ break;
+ }
+
+ if (sw_if_index == ~0)
+ return clib_error_return (0, "interface not specified");
+
+ rv = vnet_delete_loopback_interface (sw_if_index);
+
+ if (rv)
+ return clib_error_return (0, "vnet_delete_loopback_interface failed");
+
+ return 0;
+}
+
+static clib_error_t *
+delete_sub_interface (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ int rv = 0;
+ u32 sw_if_index = ~0;
+ vnet_main_t *vnm = vnet_get_main ();
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat
+ (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else
+ break;
+ }
+ if (sw_if_index == ~0)
+ return clib_error_return (0, "interface doesn't exist");
+
+ if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
+ rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
+ else
+ rv = vnet_delete_sub_interface (sw_if_index);
+ if (rv)
+ return clib_error_return (0, "delete_subinterface_interface failed");
+ return 0;
+}
+
+/*?
+ * Delete a loopback interface.
+ *
+ * @cliexpar
+ * The following two command syntaxes are equivalent:
+ * @cliexcmd{loopback delete-interface intfc <interface>}
+ * @cliexcmd{delete loopback interface intfc <interface>}
+ * Example of how to delete a loopback interface:
+ * @cliexcmd{loopback delete-interface intfc loop0}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (delete_simulated_ethernet_interface_command, static) = {
+ .path = "loopback delete-interface",
+ .short_help = "loopback delete-interface intfc <interface>",
+ .function = delete_simulated_ethernet_interfaces,
+};
+/* *INDENT-ON* */
+
+/*?
+ * Delete a loopback interface.
+ *
+ * @cliexpar
+ * The following two command syntaxes are equivalent:
+ * @cliexcmd{loopback delete-interface intfc <interface>}
+ * @cliexcmd{delete loopback interface intfc <interface>}
+ * Example of how to delete a loopback interface:
+ * @cliexcmd{delete loopback interface intfc loop0}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (delete_loopback_interface_command, static) = {
+ .path = "delete loopback interface",
+ .short_help = "delete loopback interface intfc <interface>",
+ .function = delete_simulated_ethernet_interfaces,
+};
+/* *INDENT-ON* */
+
+/*?
+ * Delete a sub-interface.
+ *
+ * @cliexpar
+ * Example of how to delete a sub-interface:
+ * @cliexcmd{delete sub-interface GigabitEthernet0/8/0.200}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (delete_sub_interface_command, static) = {
+ .path = "delete sub-interface",
+ .short_help = "delete sub-interface <interface>",
+ .function = delete_sub_interface,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */