/* * 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. */ /* * interface.h: VNET interfaces/sub-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. */ #ifndef included_vnet_interface_h #define included_vnet_interface_h #include <vnet/unix/pcap.h> #include <vnet/l3_types.h> struct vnet_main_t; struct vnet_hw_interface_t; struct vnet_sw_interface_t; struct ip46_address_t; /* Interface up/down callback. */ typedef clib_error_t *(vnet_interface_function_t) (struct vnet_main_t * vnm, u32 if_index, u32 flags); /* Sub-interface add/del callback. */ typedef clib_error_t *(vnet_subif_add_del_function_t) (struct vnet_main_t * vnm, u32 if_index, struct vnet_sw_interface_t * template, int is_add); /* Interface set mac address callback. */ typedef clib_error_t *(vnet_interface_set_mac_address_function_t) (struct vnet_hw_interface_t * hi, char *address); typedef enum vnet_interface_function_priority_t_ { VNET_ITF_FUNC_PRIORITY_LOW, VNET_ITF_FUNC_PRIORITY_HIGH, } vnet_interface_function_priority_t; #define VNET_ITF_FUNC_N_PRIO ((vnet_interface_function_priority_t)VNET_ITF_FUNC_PRIORITY_HIGH+1) typedef struct _vnet_interface_function_list_elt { struct _vnet_interface_function_list_elt *next_interface_function; clib_error_t *(*fp) (struct vnet_main_t * vnm, u32 if_index, u32 flags); } _vnet_interface_function_list_elt_t; #define _VNET_INTERFACE_FUNCTION_DECL(f,tag) \ \ static void __vnet_interface_function_init_##tag##_##f (void) \ __attribute__((__constructor__)) ; \ \ static void __vnet_interface_function_init_##tag##_##f (void) \ { \ vnet_main_t * vnm = vnet_get_main(); \ static _vnet_interface_function_list_elt_t init_function; \ init_function.next_interface_function = \ vnm->tag##_functions[VNET_ITF_FUNC_PRIORITY_LOW]; \ vnm->tag##_functions[VNET_ITF_FUNC_PRIORITY_LOW] = &init_function; \ init_function.fp = (void *) &f; \ } #define _VNET_INTERFACE_FUNCTION_DECL_PRIO(f,tag,p) \ \ static void __vnet_interface_function_init_##tag##_##f (void) \ __attribute__((__constructor__)) ; \ \ static void __vnet_interface_function_init_##tag##_##f (void) \ { \ vnet_main_t * vnm = vnet_get_main(); \ static _vnet_interface_function_list_elt_t init_function; \ init_function.next_interface_function = vnm->tag##_functions[p]; \ vnm->tag##_functions[p] = &init_function; \ init_function.fp = (void *) &f; \ } #define VNET_HW_INTERFACE_ADD_DEL_FUNCTION(f) \ _VNET_INTERFACE_FUNCTION_DECL(f,hw_interface_add_del) #define VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION(f) \ _VNET_INTERFACE_FUNCTION_DECL(f,hw_interface_link_up_down) #define VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO(f,p) \ _VNET_INTERFACE_FUNCTION_DECL_PRIO(f,hw_interface_link_up_down,p) #define VNET_SW_INTERFACE_ADD_DEL_FUNCTION(f) \ _VNET_INTERFACE_FUNCTION_DECL(f,sw_interface_add_del) #define VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION(f) \ _VNET_INTERFACE_FUNCTION_DECL(f,sw_interface_admin_up_down) #define VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO(f,p) \ _VNET_INTERFACE_FUNCTION_DECL_PRIO(f,sw_interface_admin_up_down, p) /* A class of hardware interface devices. */ typedef struct _vnet_device_class { /* Index into main vector. */ u32 index; /* Device name (e.g. "FOOBAR 1234a"). */ char *name; /* Function to call when hardware interface is added/deleted. */ vnet_interface_function_t *interface_add_del_function; /* Function to bring device administratively up/down. */ vnet_interface_function_t *admin_up_down_function; /* Function to call when sub-interface is added/deleted */ vnet_subif_add_del_function_t *subif_add_del_function; /* Redistribute flag changes/existence of this interface class. */ u32 redistribute; /* Transmit function. */ vlib_node_function_t *tx_function; /* Error strings indexed by error code for this node. */ char **tx_function_error_strings; /* Number of error codes used by this node. */ u32 tx_function_n_errors; /* Renumber device name [only!] support, a control-plane kludge */ int (*name_renumber) (struct vnet_hw_interface_t * hi, u32 new_dev_instance); /* Format device instance as name. */ format_function_t *format_device_name; /* Parse function for device name. */ unformat_function_t *unformat_device_name; /* Format device verbosely for this class. */ format_function_t *format_device; /* Trace buffer format for TX function. */ format_function_t *format_tx_trace; /* Function to clear hardware counters for device. */ void (*clear_counters) (u32 dev_class_instance); uword (*is_valid_class_for_interface) (struct vnet_main_t * vnm, u32 hw_if_index, u32 hw_class_index); /* Called when hardware class of an interface changes. */ void (*hw_class_change) (struct vnet_main_t * vnm, u32 hw_if_index, u32 new_hw_class_index); /* Called to redirect traffic from a specific interface instance */ void (*rx_redirect_to_node) (struct vnet_main_t * vnm, u32 hw_if_index, u32 node_index); /* Link-list of all device classes set up by constructors created below */ struct _vnet_device_class *next_class_registration; /* Splice vnet_interface_output_node into TX path */ u8 flatten_output_chains; /* Function to set mac address. */ vnet_interface_set_mac_address_function_t *mac_addr_change_function; } vnet_device_class_t; #define VNET_DEVICE_CLASS(x,...) \ __VA_ARGS__ vnet_device_class_t x; \ static void __vnet_add_device_class_registration_##x (void) \ __attribute__((__constructor__)) ; \ static void __vnet_add_device_class_registration_##x (void) \ { \ vnet_main_t * vnm = vnet_get_main(); \ x.next_class_registration = vnm->device_class_registrations; \ vnm->device_class_registrations = &x; \ } \ __VA_ARGS__ vnet_device_class_t x #define VLIB_DEVICE_TX_FUNCTION_CLONE_TEMPLATE(arch, fn, tgt) \ uword \ __attribute__ ((flatten)) \ __attribute__ ((target (tgt))) \ CLIB_CPU_OPTIMIZED \ fn ## _ ## arch ( vlib_main_t * vm, \ vlib_node_runtime_t * node, \ vlib_frame_t * frame) \ { return fn (vm, node, frame); } #define VLIB_DEVICE_TX_FUNCTION_MULTIARCH_CLONE(fn) \ foreach_march_variant(VLIB_DEVICE_TX_FUNCTION_CLONE_TEMPLATE, fn) #if CLIB_DEBUG > 0 #define VLIB_MULTIARCH_CLONE_AND_SELECT_FN(fn,...) #define VLIB_DEVICE_TX_FUNCTION_MULTIARCH(dev, fn) #else #define VLIB_DEVICE_TX_FUNCTION_MULTIARCH(dev, fn) \ VLIB_DEVICE_TX_FUNCTION_MULTIARCH_CLONE(fn) \ CLIB_MULTIARCH_SELECT_FN(fn, static inline) \ static void __attribute__((__constructor__)) \ __vlib_device_tx_function_multiarch_select_##dev (void) \ { dev.tx_function = fn ## _multiarch_select(); } #endif /** * Link Type: A description of the protocol of packets on the link. * On an ethernet link this maps directly into the ethertype. On a GRE tunnel * it maps to the GRE-proto, etc for other lnk types. */ typedef enum vnet_link_t_ { #if CLIB_DEBUG > 0 VNET_LINK_IP4 = 1, #else VNET_LINK_IP4 = 0, #endif VNET_LINK_IP6, VNET_LINK_MPLS, VNET_LINK_ETHERNET, VNET_LINK_ARP, VNET_LINK_NSH, } __attribute__ ((packed)) vnet_link_t; #define VNET_LINKS { \ [VNET_LINK_ETHERNET] = "ethernet", \ [VNET_LINK_IP4] = "ipv4", \ [VNET_LINK_IP6] = "ipv6", \ [VNET_LINK_MPLS] = "mpls", \ [VNET_LINK_ARP] = "arp", \ [VNET_LINK_NSH] = "nsh", \ } /** * @brief Number of link types. Not part of the enum so it does not have to be included in * switch statements */ #define VNET_LINK_NUM (VNET_LINK_NSH+1) /** * @brief Convert a link to to an Ethertype */ extern vnet_l3_packet_type_t vnet_link_to_l3_proto (vnet_link_t link); /** * @brief Attributes assignable to a HW interface Class. */ typedef enum vnet_hw_interface_class_flags_t_ { /** * @brief a point 2 point interface */ VNET_HW_INTERFACE_CLASS_FLAG_P2P = (1 << 0), } vnet_hw_interface_class_flags_t; /* Layer-2 (e.g. Ethernet) interface class. */ typedef struct _vnet_hw_interface_class { /* Index into main vector. */ u32 index; /* Class name (e.g. "Ethernet"). */ char *name; /* Flags */ vnet_hw_interface_class_flags_t flags; /* Function to call when hardware interface is added/deleted. */ vnet_interface_function_t *interface_add_del_function; /* Function to bring interface administratively up/down. */ vnet_interface_function_t *admin_up_down_function; /* Function to call when link state changes. */ vnet_interface_function_t *link_up_down_function; /* Function to call when link MAC changes. */ vnet_interface_set_mac_address_function_t *mac_addr_change_function; /* Format function to display interface name. */ format_function_t *format_interface_name; /* Format function to display interface address. */ format_function_t *format_address; /* Format packet header for this interface class. */ format_function_t *format_header; /* Format device verbosely for this class. */ format_function_t *format_device; /* Parser for hardware (e.g. ethernet) address. */ unformat_function_t *unformat_hw_address; /* Parser for packet header for e.g. rewrite string. */ unformat_function_t *unformat_header; /* Builds a rewrite string for the interface to the destination * for the payload/link type. */ u8 *(*build_rewrite) (struct vnet_main_t * vnm, u32 sw_if_index, vnet_link_t link_type, const void *dst_hw_address); /* Update an adjacecny added by FIB (as opposed to via the * neighbour resolution protocol). */ void (*update_adjacency) (struct vnet_main_t * vnm, u32 sw_if_index, u32 adj_index); uword (*is_valid_class_for_interface) (struct vnet_main_t * vnm, u32 hw_if_index, u32 hw_class_index); /* Called when hw interface class is changed and old hardware instance may want to be deleted. */ void (*hw_class_change) (struct vnet_main_t * vnm, u32 hw_if_index, u32 old_class_index, u32 new_class_index); /* List of hw interface classes, built by constructors */ struct _vnet_hw_interface_class *next_class_registration; } vnet_hw_interface_class_t; /** * @brief Return a complete, zero-length (aka dummy) rewrite */ extern u8 *default_build_rewrite (struct vnet_main_t *vnm, u32 sw_if_index, vnet_link_t link_type, const void *dst_hw_address); /** * @brief Default adjacency update function */ extern void default_update_adjacency (struct vnet_main_t *vnm, u32 sw_if_index, u32 adj_index); #define VNET_HW_INTERFACE_CLASS(x,...) \ __VA_ARGS__ vnet_hw_interface_class_t x; \ static void __vnet_add_hw_interface_class_registration_##x (void) \ __attribute__((__constructor__)) ; \ static void __vnet_add_hw_interface_class_registration_##x (void) \ { \ vnet_main_t * vnm = vnet_get_main(); \ x.next_class_registration = vnm->hw_interface_class_registrations; \ vnm->hw_interface_class_registrations = &x; \ } \ __VA_ARGS__ vnet_hw_interface_class_t x /* Hardware-interface. This corresponds to a physical wire that packets flow over. */ typedef struct vnet_hw_interface_t { /* Interface name. */ u8 *name; u32 flags; /* Hardware link state is up. */ #define VNET_HW_INTERFACE_FLAG_LINK_UP (1 << 0) /* Hardware duplex state */ #define VNET_HW_INTERFACE_FLAG_DUPLEX_SHIFT 1 #define VNET_HW_INTERFACE_FLAG_HALF_DUPLEX (1 << 1) #define VNET_HW_INTERFACE_FLAG_FULL_DUPLEX (1 << 2) #define VNET_HW_INTERFACE_FLAG_DUPLEX_MASK \ (VNET_HW_INTERFACE_FLAG_HALF_DUPLEX | \ VNET_HW_INTERFACE_FLAG_FULL_DUPLEX) /* Hardware link speed */ #define VNET_HW_INTERFACE_FLAG_SPEED_SHIFT 3 #define VNET_HW_INTERFACE_FLAG_SPEED_10M (1 << 3) #define VNET_HW_INTERFACE_FLAG_SPEED_100M (1 << 4) #define VNET_HW_INTERFACE_FLAG_SPEED_1G (1 << 5) #define VNET_HW_INTERFACE_FLAG_SPEED_10G (1 << 6) #define VNET_HW_INTERFACE_FLAG_SPEED_40G (1 << 7) #define VNET_HW_INTERFACE_FLAG_SPEED_100G (1 << 8) #define VNET_HW_INTERFACE_FLAG_SPEED_MASK \ (VNET_HW_INTERFACE_FLAG_SPEED_10M | \ VNET_HW_INTERFACE_FLAG_SPEED_100M | \ VNET_HW_INTERFACE_FLAG_SPEED_1G | \ VNET_HW_INTERFACE_FLAG_SPEED_10G | \ VNET_HW_INTERFACE_FLAG_SPEED_40G | \ VNET_HW_INTERFACE_FLAG_SPEED_100G) /* l2output node flags */ #define VNET_HW_INTERFACE_FLAG_L2OUTPUT_SHIFT 9 #define VNET_HW_INTERFACE_FLAG_L2OUTPUT_MAPPED (1 << 9) /* Hardware address as vector. Zero (e.g. zero-length vector) if no address for this class (e.g. PPP). */ u8 *hw_address; /* Interface is up as far as software is concerned. */ /* NAME.{output,tx} nodes for this interface. */ u32 output_node_index, tx_node_index; /* (dev_class, dev_instance) uniquely identifies hw interface. */ u32 dev_class_index; u32 dev_instance; /* (hw_class, hw_instance) uniquely identifies hw interface. */ u32 hw_class_index; u32 hw_instance; /* Hardware index for this hardware interface. */ u32 hw_if_index; /* Software index for this hardware interface. */ u32 sw_if_index; /* Maximum transmit rate for this interface in bits/sec. */ f64 max_rate_bits_per_sec; /* Smallest packet size supported by this interface. */ u32 min_supported_packet_bytes; /* Largest packet size supported by this interface. */ u32 max_supported_packet_bytes; /* Smallest packet size for this interface. */ u32 min_packet_bytes; /* Largest packet size for this interface. */ u32 max_packet_bytes; /* Number of extra bytes that go on the wire. Packet length on wire = max (length + per_packet_overhead_bytes, min_packet_bytes). */ u32 per_packet_overhead_bytes; /* Receive and transmit layer 3 packet size limits (MRU/MTU). */ u32 max_l3_packet_bytes[VLIB_N_RX_TX]; /* Hash table mapping sub interface id to sw_if_index. */ uword *sub_interface_sw_if_index_by_id; /* Count of number of L2 subinterfaces */ u32 l2_if_count; /* Bonded interface info - 0 - not a bonded interface nor a slave ~0 - slave to a bonded interface others - A bonded interface with a pointer to bitmap for all slaves */ uword *bond_info; #define VNET_HW_INTERFACE_BOND_INFO_NONE ((uword *) 0) #define VNET_HW_INTERFACE_BOND_INFO_SLAVE ((uword *) ~0) } vnet_hw_interface_t; extern vnet_device_class_t vnet_local_interface_device_class; typedef enum { /* A hw interface. */ VNET_SW_INTERFACE_TYPE_HARDWARE, /* A sub-interface. */ VNET_SW_INTERFACE_TYPE_SUB, } vnet_sw_interface_type_t; typedef struct { /* * Subinterface ID. A number 0-N to uniquely identify * this subinterface under the main (parent?) interface */ u32 id; /* Classification data. Used to associate packet header with subinterface. */ struct { u16 outer_vlan_id; u16 inner_vlan_id; union { u16 raw_flags; struct { u16 no_tags:1; u16 one_tag:1; u16 two_tags:1; u16 dot1ad:1; /* 0 = dot1q, 1=dot1ad */ u16 exact_match:1; u16 default_sub:1; u16 outer_vlan_id_any:1; u16 inner_vlan_id_any:1; } flags; }; } eth; } vnet_sub_interface_t; typedef enum { /* Always flood */ VNET_FLOOD_CLASS_NORMAL, VNET_FLOOD_CLASS_TUNNEL_MASTER, /* Does not flood when tunnel master is in the same L2 BD */ VNET_FLOOD_CLASS_TUNNEL_NORMAL } vnet_flood_class_t; /* Software-interface. This corresponds to a Ethernet VLAN, ATM vc, a tunnel, etc. Configuration (e.g. IP address) gets attached to software interface. */ typedef struct { vnet_sw_interface_type_t type:16; u16 flags; /* Interface is "up" meaning adminstratively up. Up in the sense of link state being up is maintained by hardware interface. */ #define VNET_SW_INTERFACE_FLAG_ADMIN_UP (1 << 0) /* Interface is disabled for forwarding: punt all traffic to slow-path. */ #define VNET_SW_INTERFACE_FLAG_PUNT (1 << 1) #define VNET_SW_INTERFACE_FLAG_PROXY_ARP (1 << 2) #define VNET_SW_INTERFACE_FLAG_UNNUMBERED (1 << 3) #define VNET_SW_INTERFACE_FLAG_BOND_SLAVE (1 << 4) /* Index for this interface. */ u32 sw_if_index; /* Software interface index of super-interface; equal to sw_if_index if this interface is not a sub-interface. */ u32 sup_sw_if_index; /* this swif is unnumbered, use addresses on unnumbered_sw_if_index... */ u32 unnumbered_sw_if_index; u32 link_speed; union { /* VNET_SW_INTERFACE_TYPE_HARDWARE. */ u32 hw_if_index; /* VNET_SW_INTERFACE_TYPE_SUB. */ vnet_sub_interface_t sub; }; vnet_flood_class_t flood_class; } vnet_sw_interface_t; typedef enum { /* Simple counters. */ VNET_INTERFACE_COUNTER_DROP = 0, VNET_INTERFACE_COUNTER_PUNT = 1, VNET_INTERFACE_COUNTER_IP4 = 2, VNET_INTERFACE_COUNTER_IP6 = 3, VNET_INTERFACE_COUNTER_RX_NO_BUF = 4, VNET_INTERFACE_COUNTER_RX_MISS = 5, VNET_INTERFACE_COUNTER_RX_ERROR = 6, VNET_INTERFACE_COUNTER_TX_ERROR = 7, VNET_INTERFACE_COUNTER_MPLS = 8, VNET_N_SIMPLE_INTERFACE_COUNTER = 9, /* Combined counters. */ VNET_INTERFACE_COUNTER_RX = 0, VNET_INTERFACE_COUNTER_TX = 1, VNET_N_COMBINED_INTERFACE_COUNTER = 2, } vnet_interface_counter_type_t; typedef struct { u32 output_node_index; u32 tx_node_index; } vnet_hw_interface_nodes_t; typedef struct { /* Hardware interfaces. */ vnet_hw_interface_t *hw_interfaces; /* Hash table mapping HW interface name to index. */ uword *hw_interface_by_name; /* Vectors if hardware interface classes and device classes. */ vnet_hw_interface_class_t *hw_interface_classes; vnet_device_class_t *device_classes; /* Hash table mapping name to hw interface/device class. */ uword *hw_interface_class_by_name; uword *device_class_by_name; /* Software interfaces. */ vnet_sw_interface_t *sw_interfaces; /* Hash table mapping sub intfc sw_if_index by sup sw_if_index and sub id */ uword *sw_if_index_by_sup_and_sub; /* Software interface counters both simple and combined packet and byte counters. */ volatile u32 *sw_if_counter_lock; vlib_simple_counter_main_t *sw_if_counters; vlib_combined_counter_main_t *combined_sw_if_counters; vnet_hw_interface_nodes_t *deleted_hw_interface_nodes; /* pcap drop tracing */ int drop_pcap_enable; pcap_main_t pcap_main; u8 *pcap_filename; u32 pcap_sw_if_index; u32 pcap_pkts_to_capture; uword *pcap_drop_filter_hash; /* feature_arc_index */ u8 output_feature_arc_index; } vnet_interface_main_t; static inline void vnet_interface_counter_lock (vnet_interface_main_t * im) { if (im->sw_if_counter_lock) while (__sync_lock_test_and_set (im->sw_if_counter_lock, 1)) /* zzzz */ ; } static inline void vnet_interface_counter_unlock (vnet_interface_main_t * im) { if (im->sw_if_counter_lock) *im->sw_if_counter_lock = 0; } void vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add); int vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance); #endif /* included_vnet_interface_h */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */