vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2018-04-17	ACL based forwarding	Andrew Yourtchenko	1	-0/+338

/* * Copyright (c) 2017 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. */ #include <stdint.h> #include <vlib/vlib.h> #include <vlib/unix/unix.h> #include <vnet/plugin/plugin.h> #include <vpp/app/version.h> #include <vppinfra/hash.h> #include <vnet/bonding/node.h> #include <lacp/node.h> lacp_main_t lacp_main; /* * Generate lacp pdu */ static void lacp_fill_pdu (lacp_pdu_t * lacpdu, slave_if_t * sif) { /* Actor TLV */ lacpdu->actor.port_info = sif->actor; /* Partner TLV */ lacpdu->partner.port_info = sif->partner; } /* * send a lacp pkt on an ethernet interface */ static void lacp_send_ethernet_lacp_pdu (slave_if_t * sif) { lacp_main_t *lm = &lacp_main; u32 *to_next; ethernet_lacp_pdu_t *h0; vnet_hw_interface_t *hw; u32 bi0; vlib_buffer_t *b0; vlib_frame_t *f; vlib_main_t *vm = lm->vlib_main; vnet_main_t *vnm = lm->vnet_main; /* * see lacp_periodic_init() to understand what's already painted * into the buffer by the packet template mechanism */ h0 = vlib_packet_template_get_packet (vm, &lm->packet_templates[sif->packet_template_index], &bi0); if (!h0) return; /* Add the interface's ethernet source address */ hw = vnet_get_sup_hw_interface (vnm, sif->sw_if_index); clib_memcpy (h0->ethernet.src_address, hw->hw_address, vec_len (hw->hw_address)); lacp_fill_pdu (&h0->lacp, sif); /* Set the outbound packet length */ b0 = vlib_get_buffer (vm, bi0); b0->current_length = sizeof (ethernet_lacp_pdu_t); b0->current_data = 0; b0->total_length_not_including_first_buffer = 0; /* And the outbound interface */ vnet_buffer (b0)->sw_if_index[VLIB_TX] = hw->sw_if_index; /* And output the packet on the correct interface */ f = vlib_get_frame_to_node (vm, hw->output_node_index); to_next = vlib_frame_vector_args (f); to_next[0] = bi0; f->n_vectors = 1; vlib_put_frame_to_node (vm, hw->output_node_index, f); sif->last_lacpdu_time = vlib_time_now (lm->vlib_main); } /* * Decide which lacp packet template to use */ static int lacp_pick_packet_template (slave_if_t * sif) { sif->packet_template_index = LACP_PACKET_TEMPLATE_ETHERNET; return 0; } void lacp_send_lacp_pdu (vlib_main_t * vm, slave_if_t * sif) { if (sif->mode != BOND_MODE_LACP) { lacp_stop_timer (&sif->periodic_timer); return; } if (sif->packet_template_index == (u8) ~ 0) { /* If we don't know how to talk to this peer, don't try again */ if (lacp_pick_packet_template (sif)) { lacp_stop_timer (&sif->periodic_timer); return; } } switch (sif->packet_template_index) { case LACP_PACKET_TEMPLATE_ETHERNET: lacp_send_ethernet_lacp_pdu (sif); break; default: ASSERT (0); } } void lacp_periodic (vlib_main_t * vm) { bond_main_t *bm = &bond_main; lacp_main_t *lm = &lacp_main; slave_if_t *sif; /* *INDENT-OFF* */ pool_foreach (sif, bm->neighbors, ({ if (sif->port_enabled == 0) continue; if (lacp_timer_is_running (sif->current_while_timer) && lacp_timer_is_expired (lm->vlib_main, sif->current_while_timer)) { lacp_machine_dispatch (&lacp_rx_machine, vm, sif, LACP_RX_EVENT_TIMER_EXPIRED, &sif->rx_state); } if (lacp_timer_is_running (sif->periodic_timer) && lacp_timer_is_expired (lm->vlib_main, sif->periodic_timer)) { lacp_machine_dispatch (&lacp_ptx_machine, vm, sif, LACP_PTX_EVENT_TIMER_EXPIRED, &sif->ptx_state); } if (lacp_timer_is_running (sif->wait_while_timer) && lacp_timer_is_expired (lm->vlib_main, sif->wait_while_timer)) { sif->ready_n = 1; lacp_stop_timer (&sif->wait_while_timer); lacp_selection_logic (vm, sif); } })); /* *INDENT-ON* */ } static void lacp_interface_enable_disable (vlib_main_t * vm, bond_if_t * bif, slave_if_t * sif, u8 enable) { lacp_main_t *lm = &lacp_main; uword port_number; if (enable) { port_number = clib_bitmap_first_clear (bif->port_number_bitmap); bif->port_number_bitmap = clib_bitmap_set (bif->port_number_bitmap, port_number, 1); // bitmap starts at 0. Our port number starts at 1. lacp_init_neighbor (sif, bif->hw_address, port_number + 1, sif->group); lacp_init_state_machines (vm, sif); lm->lacp_int++; if (lm->lacp_int == 1) { vlib_process_signal_event (vm, lm->lacp_process_node_index, LACP_PROCESS_EVENT_START, 0); } } else { lm->lacp_int--; if (lm->lacp_int == 0) { vlib_process_signal_event (vm, lm->lacp_process_node_index, LACP_PROCESS_EVENT_STOP, 0); } } } static clib_error_t * lacp_periodic_init (vlib_main_t * vm) { lacp_main_t *lm = &lacp_main; ethernet_lacp_pdu_t h; ethernet_marker_pdu_t m; u8 dst[] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; /* initialize binary API */ lacp_plugin_api_hookup (vm); /* Create the ethernet lacp packet template */ memset (&h, 0, sizeof (h)); memcpy (h.ethernet.dst_address, dst, sizeof (h.ethernet.dst_address)); /* leave src address blank (fill in at send time) */ h.ethernet.type = htons (ETHERNET_TYPE_SLOW_PROTOCOLS); h.lacp.subtype = LACP_SUBTYPE; h.lacp.version_number = LACP_ACTOR_LACP_VERSION; /* Actor TLV */ h.lacp.actor.tlv_type = LACP_ACTOR_INFORMATION; h.lacp.actor.tlv_length = sizeof (lacp_actor_partner_t); /* Partner TLV */ h.lacp.partner.tlv_type = LACP_PARTNER_INFORMATION; h.lacp.partner.tlv_length = sizeof (lacp_actor_partner_t); /* Collector TLV */ h.lacp.collector.tlv_type = LACP_COLLECTOR_INFORMATION; h.lacp.collector.tlv_length = sizeof (lacp_collector_t); h.lacp.collector.max_delay = 0; /* Terminator TLV */ h.lacp.terminator.tlv_type = LACP_TERMINATOR_INFORMATION; h.lacp.terminator.tlv_length = 0; vlib_packet_template_init (vm, &lm->packet_templates[LACP_PACKET_TEMPLATE_ETHERNET], /* data */ &h, sizeof (h), /* alloc chunk size */ 8, "lacp-ethernet"); /* Create the ethernet marker protocol packet template */ memset (&m, 0, sizeof (m)); memcpy (m.ethernet.dst_address, dst, sizeof (m.ethernet.dst_address)); /* leave src address blank (fill in at send time) */ m.ethernet.type = htons (ETHERNET_TYPE_SLOW_PROTOCOLS); m.marker.subtype = MARKER_SUBTYPE; m.marker.version_number = MARKER_PROTOCOL_VERSION; m.marker.marker_info.tlv_length = sizeof (marker_information_t); /* Terminator TLV */ m.marker.terminator.tlv_type = MARKER_TERMINATOR_INFORMATION; m.marker.terminator.tlv_length = 0; vlib_packet_template_init (vm, &lm->marker_packet_templates[MARKER_PACKET_TEMPLATE_ETHERNET], /* data */ &m, sizeof (m), /* alloc chunk size */ 8, "marker-ethernet"); bond_register_callback (lacp_interface_enable_disable); return 0; } int lacp_machine_dispatch (lacp_machine_t * machine, vlib_main_t * vm, slave_if_t * sif, int event, int *state) { lacp_fsm_state_t *transition; int rc = 0; transition = &machine->tables[*state].state_table[event]; LACP_DBG2 (sif, event, *state, machine, transition); *state = transition->next_state; if (transition->action) rc = (*transition->action) ((void *) vm, (void *) sif); return rc; } void lacp_init_neighbor (slave_if_t * sif, u8 * hw_address, u16 port_number, u32 group) { lacp_stop_timer (&sif->wait_while_timer); lacp_stop_timer (&sif->current_while_timer); lacp_stop_timer (&sif->actor_churn_timer); lacp_stop_timer (&sif->partner_churn_timer); lacp_stop_timer (&sif->periodic_timer); lacp_stop_timer (&sif->last_lacpdu_time); sif->lacp_enabled = 1; sif->loopback_port = 0; sif->ready = 0; sif->ready_n = 0; sif->port_moved = 0; sif->ntt = 0; sif->selected = LACP_PORT_UNSELECTED; sif->actor.state = LACP_STATE_AGGREGATION; if (sif->ttl_in_seconds == LACP_SHORT_TIMOUT_TIME) sif->actor.state |= LACP_STATE_LACP_TIMEOUT; if (sif->is_passive == 0) sif->actor.state |= LACP_STATE_LACP_ACTIVITY; clib_memcpy (sif->actor.system, hw_address, 6); sif->actor.system_priority = htons (LACP_DEFAULT_SYSTEM_PRIORITY); sif->actor.key = htons (group); sif->actor.port_number = htons (port_number); sif->actor.port_priority = htons (LACP_DEFAULT_PORT_PRIORITY); sif->partner.system_priority = htons (LACP_DEFAULT_SYSTEM_PRIORITY); sif->partner.key = htons (group); sif->partner.port_number = htons (port_number); sif->partner.port_priority = htons (LACP_DEFAULT_PORT_PRIORITY); sif->partner.key = htons (group); sif->partner.state = LACP_STATE_LACP_ACTIVITY; sif->actor_admin = sif->actor; sif->partner_admin = sif->partner; } void lacp_init_state_machines (vlib_main_t * vm, slave_if_t * sif) { lacp_init_tx_machine (vm, sif); lacp_init_mux_machine (vm, sif); lacp_init_ptx_machine (vm, sif); lacp_init_rx_machine (vm, sif); } VLIB_INIT_FUNCTION (lacp_periodic_init); static clib_error_t * lacp_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags) { lacp_main_t *lm = &lacp_main; slave_if_t *sif; vlib_main_t *vm = lm->vlib_main; sif = bond_get_slave_by_sw_if_index (sw_if_index); if (sif) { sif->port_enabled = flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP; if (sif->port_enabled == 0) { if (sif->lacp_enabled) { lacp_init_state_machines (vm, sif); lacp_init_neighbor (sif, sif->actor_admin.system, ntohs (sif->actor_admin.port_number), ntohs (sif->actor_admin.key)); } } } return 0; } VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (lacp_sw_interface_up_down); static clib_error_t * lacp_hw_interface_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags) { lacp_main_t *lm = &lacp_main; slave_if_t *sif; vnet_sw_interface_t *sw; vlib_main_t *vm = lm->vlib_main; sw = vnet_get_hw_sw_interface (vnm, hw_if_index); sif = bond_get_slave_by_sw_if_index (sw->sw_if_index); if (sif) { if (!(flags & VNET_HW_INTERFACE_FLAG_LINK_UP)) { if (sif->lacp_enabled) { lacp_init_state_machines (vm, sif); lacp_init_neighbor (sif, sif->actor_admin.system, ntohs (sif->actor_admin.port_number), ntohs (sif->actor_admin.key)); } } } return 0; } VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION (lacp_hw_interface_up_down); /* *INDENT-OFF* */ VLIB_PLUGIN_REGISTER () = { .version = VPP_BUILD_VER, .description = "Link Aggregation Control Protocol", }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */