#include <vnet/l2/l2_flood.h>
#include <vnet/l2/l2_bvi.h>
+/* Allocated BVI instances */
+static uword *l2_bvi_instances;
/* Call the L2 nodes that need the ethertype mapping */
void
l2flood_register_input_type (vm, type, node_index);
}
+static u8 *
+format_bvi_name (u8 * s, va_list * args)
+{
+ u32 dev_instance = va_arg (*args, u32);
+ return format (s, "bvi%d", dev_instance);
+}
+
+static clib_error_t *
+bvi_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;
+}
+
+static clib_error_t *
+bvi_mac_change (vnet_hw_interface_t * hi,
+ const u8 * old_address, const u8 * mac_address)
+{
+ l2input_interface_mac_change (hi->sw_if_index, old_address, mac_address);
+
+ return (NULL);
+}
+
+/* *INDENT-OFF* */
+VNET_DEVICE_CLASS (bvi_device_class) = {
+ .name = "BVI",
+ .format_device_name = format_bvi_name,
+ .admin_up_down_function = bvi_admin_up_down,
+ .mac_addr_change_function = bvi_mac_change,
+};
+/* *INDENT-ON* */
+
+/*
+ * Maintain a bitmap of allocated bvi instance numbers.
+ */
+#define BVI_MAX_INSTANCE (16 * 1024)
+
+static u32
+bvi_instance_alloc (u32 want)
+{
+ /*
+ * Check for dynamically allocaetd instance number.
+ */
+ if (~0 == want)
+ {
+ u32 bit;
+
+ bit = clib_bitmap_first_clear (l2_bvi_instances);
+ if (bit >= BVI_MAX_INSTANCE)
+ {
+ return ~0;
+ }
+ l2_bvi_instances = clib_bitmap_set (l2_bvi_instances, bit, 1);
+ return bit;
+ }
+
+ /*
+ * In range?
+ */
+ if (want >= BVI_MAX_INSTANCE)
+ {
+ return ~0;
+ }
+
+ /*
+ * Already in use?
+ */
+ if (clib_bitmap_get (l2_bvi_instances, want))
+ {
+ return ~0;
+ }
+
+ /*
+ * Grant allocation request.
+ */
+ l2_bvi_instances = clib_bitmap_set (l2_bvi_instances, want, 1);
+
+ return want;
+}
+
+static int
+bvi_instance_free (u32 instance)
+{
+ if (instance >= BVI_MAX_INSTANCE)
+ {
+ return -1;
+ }
+
+ if (clib_bitmap_get (l2_bvi_instances, instance) == 0)
+ {
+ return -1;
+ }
+
+ l2_bvi_instances = clib_bitmap_set (l2_bvi_instances, instance, 0);
+ return 0;
+}
+
+int
+l2_bvi_create (u32 user_instance,
+ const mac_address_t * mac_in, u32 * sw_if_indexp)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vlib_main_t *vm = vlib_get_main ();
+ u32 instance, hw_if_index, slot;
+ vnet_hw_interface_t *hw_if;
+ clib_error_t *error;
+ mac_address_t mac;
+
+ int rv = 0;
+
+ ASSERT (sw_if_indexp);
+
+ *sw_if_indexp = (u32) ~ 0;
+
+ /*
+ * Allocate a bvi instance. Either select on dynamically
+ * or try to use the desired user_instance number.
+ */
+ instance = bvi_instance_alloc (user_instance);
+ if (instance == ~0)
+ {
+ return VNET_API_ERROR_INVALID_REGISTRATION;
+ }
+
+ /*
+ * Default MAC address (b0b0:0000:0000 + instance) is allocated
+ * if zero mac_address is configured. Otherwise, user-configurable MAC
+ * address is programmed on the bvi interface.
+ */
+ if (mac_address_is_zero (mac_in))
+ {
+ u8 bytes[] = {
+ [0] = 0xb0,
+ [1] = 0xb0,
+ [5] = instance,
+ };
+ mac_address_from_bytes (&mac, bytes);
+ }
+ else
+ {
+ mac_address_copy (&mac, mac_in);
+ }
+
+ error = ethernet_register_interface (vnm,
+ bvi_device_class.index,
+ instance, mac.bytes, &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,
+ "l2-input", 0);
+ ASSERT (slot == 0);
+
+ {
+ vnet_sw_interface_t *si = vnet_get_hw_sw_interface (vnm, hw_if_index);
+ *sw_if_indexp = si->sw_if_index;
+
+ si->flood_class = VNET_FLOOD_CLASS_BVI;
+ }
+
+ return 0;
+}
+
+int
+l2_bvi_delete (u32 sw_if_index)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+
+ if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
+ if (hw == 0 || hw->dev_class_index != bvi_device_class.index)
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ if (bvi_instance_free (hw->dev_instance) < 0)
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ ethernet_delete_interface (vnm, hw->hw_if_index);
+
+ return 0;
+}
+
+static clib_error_t *
+l2_bvi_create_cli (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u32 instance, sw_if_index;
+ clib_error_t *error;
+ mac_address_t mac;
+ int rv;
+
+ error = NULL;
+ instance = sw_if_index = ~0;
+ mac_address_set_zero (&mac);
+
+ if (unformat_user (input, unformat_line_input, line_input))
+ {
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "mac %U", unformat_mac_address_t, &mac))
+ ;
+ else if (unformat (line_input, "instance %d", &instance))
+ ;
+ else
+ {
+ error = clib_error_return (0, "unknown input: %U",
+ format_unformat_error, line_input);
+ break;
+ }
+ }
+
+ unformat_free (line_input);
+
+ if (error)
+ return error;
+ }
+
+ rv = l2_bvi_create (instance, &mac, &sw_if_index);
+
+ if (rv)
+ return clib_error_return (0, "BVI create failed");
+
+ vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
+ sw_if_index);
+ return 0;
+}
+
+/*?
+ * Create a BVI interface. Optionally, a MAC Address can be
+ * provided. If not provided, 0b:0b::00:00:00:<instance> will be used.
+ *
+ * @cliexpar
+ * The following two command syntaxes are equivalent:
+ * @cliexcmd{bvi create [mac <mac-addr>] [instance <instance>]}
+ * Example of how to create a bvi interface:
+ * @cliexcmd{bvi create}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (l2_bvi_create_command, static) = {
+ .path = "bvi create",
+ .short_help = "bvi create [mac <mac-addr>] [instance <instance>]",
+ .function = l2_bvi_create_cli,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+l2_bvi_delete_cli (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm;
+ u32 sw_if_index;
+ int rv;
+
+ vnm = vnet_get_main ();
+ sw_if_index = ~0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat
+ (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else
+ break;
+ }
+
+ if (~0 != sw_if_index)
+ {
+ rv = l2_bvi_delete (sw_if_index);
+
+ if (rv)
+ return clib_error_return (0, "BVI delete failed");
+ }
+ else
+ return clib_error_return (0, "no such interface: %U",
+ format_unformat_error, input);
+
+ return 0;
+}
+
+/*?
+ * Delete a BVI interface.
+ *
+ * @cliexpar
+ * The following two command syntaxes are equivalent:
+ * @cliexcmd{bvi delete <interace>
+ * Example of how to create a bvi interface:
+ * @cliexcmd{bvi delete bvi0}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (l2_bvi_delete_command, static) = {
+ .path = "bvi delete",
+ .short_help = "bvi delete <interface>",
+ .function = l2_bvi_delete_cli,
+};
+/* *INDENT-ON* */
+
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff