Line data    Source code

       1             : /*
       2             :  * nexthop.h --
       3             :  *
       4             :  * Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
       5             :  */
       6             : #ifndef __NEXTHOP_H__
       7             : #define __NEXTHOP_H__
       8             : 
       9             : #include "vr_defs.h"
      10             : 
      11             : #ifdef __cplusplus
      12             : extern "C" {
      13             : #endif
      14             : 
      15             : #include "vr_os.h"
      16             : #include "vr_types.h"
      17             : #include "vr_interface.h"
      18             : 
      19             : #define VR_DEF_NEXTHOPS                 524288
      20             : #define NH_TABLE_ENTRIES                VR_DEF_NEXTHOPS
      21             : 
      22             : #define VR_NEXTHOP_COMPONENT_DUMP_LIMIT 16
      23             : 
      24             : #define NH_DISCARD_ID                   0
      25             : 
      26             : enum nexthop_type {
      27             :     NH_DEAD,
      28             :     NH_RCV,
      29             :     NH_ENCAP,
      30             :     NH_TUNNEL,
      31             :     NH_RESOLVE,
      32             :     NH_DISCARD,
      33             :     NH_COMPOSITE,
      34             :     NH_VRF_TRANSLATE,
      35             :     NH_L2_RCV,
      36             :     NH_MAX,
      37             : };
      38             : 
      39             : #define NH_VXLAN_VRF                        NH_VRF_TRANSLATE
      40             : 
      41             : #define NH_FLAG_VALID                       0x000001
      42             : #define NH_FLAG_POLICY_ENABLED              0x000002
      43             : /* 0x000004 is free */
      44             : #define NH_FLAG_TUNNEL_GRE                  0x000008
      45             : #define NH_FLAG_TUNNEL_UDP                  0x000010
      46             : /*
      47             :  * Mcast flag can be appended to any type of nexthop, either an Encap,
      48             :  * composite etc
      49             :  */
      50             : #define NH_FLAG_MCAST                       0x000020
      51             : #define NH_FLAG_TUNNEL_UDP_MPLS             0x000040
      52             : #define NH_FLAG_TUNNEL_VXLAN                0x000080
      53             : #define NH_FLAG_RELAXED_POLICY              0x000100
      54             : #define NH_FLAG_COMPOSITE_FABRIC            0x000200
      55             : #define NH_FLAG_COMPOSITE_ECMP              0x000400
      56             : #define NH_FLAG_COMPOSITE_LU_ECMP           0x000800
      57             : #define NH_FLAG_COMPOSITE_EVPN              0x001000
      58             : #define NH_FLAG_COMPOSITE_ENCAP             0x002000
      59             : #define NH_FLAG_COMPOSITE_TOR               0x004000
      60             : #define NH_FLAG_ROUTE_LOOKUP                0x008000
      61             : #define NH_FLAG_UNKNOWN_UC_FLOOD            0x010000
      62             : #define NH_FLAG_TUNNEL_SIP_COPY             0x020000
      63             : #define NH_FLAG_FLOW_LOOKUP                 0x040000
      64             : #define NH_FLAG_TUNNEL_PBB                  0x080000
      65             : #define NH_FLAG_MAC_LEARN                   0x100000
      66             : #define NH_FLAG_ETREE_ROOT                  0x200000
      67             : #define NH_FLAG_INDIRECT                    0x400000
      68             : #define NH_FLAG_L2_CONTROL_DATA             0x800000
      69             : #define NH_FLAG_CRYPT_TRAFFIC               0x01000000
      70             : #define NH_FLAG_L3_VXLAN                    0x02000000
      71             : #define NH_FLAG_TUNNEL_MPLS_O_MPLS          0x04000000
      72             : #define NH_FLAG_VALIDATE_MCAST_SRC          0x08000000
      73             : #define NH_FLAG_TUNNEL_UNDERLAY_ECMP        0x10000000
      74             : 
      75             : #define NH_SOURCE_INVALID                   0
      76             : #define NH_SOURCE_VALID                     1
      77             : #define NH_SOURCE_MISMATCH                  2
      78             : 
      79             : 
      80             : #define NH_ECMP_CONFIG_HASH_BITS            5
      81             : #define NH_ECMP_CONFIG_HASH_MASK            ((1 << NH_ECMP_CONFIG_HASH_BITS) - 1)
      82             : #define NH_ECMP_CONFIG_HASH_PROTO           0x01
      83             : #define NH_ECMP_CONFIG_HASH_SRC_IP          0x02
      84             : #define NH_ECMP_CONFIG_HASH_SRC_PORT        0x04
      85             : #define NH_ECMP_CONFIG_HASH_DST_IP          0x08
      86             : #define NH_ECMP_CONFIG_HASH_DST_PORT        0x10
      87             : 
      88             : #define NH_ECMP_PACKET_HELD                 (-2)
      89             : 
      90             : struct vr_packet;
      91             : 
      92             : struct vr_forwarding_md;
      93             : 
      94             : struct vr_component_nh {
      95             :     int cnh_label;
      96             :     int cnh_ecmp_index;
      97             :     struct vr_nexthop *cnh;
      98             : };
      99             : 
     100             : typedef enum {
     101             :     NH_PROCESSING_COMPLETE,
     102             :     NH_PROCESSING_INCOMPLETE,
     103             : } nh_processing_t;
     104             : 
     105             : struct vr_nexthop {
     106             :     uint8_t         nh_type;
     107             :     /*
     108             :      * nh_family is going to be AF_INET for L3 nexthops, AF_BRIDGE for L2
     109             :      * nexthops
     110             :      */
     111             :     uint8_t         nh_family;
     112             :     /* nh_data_size = encap_size * number of physical interfaces */
     113             :     uint16_t        nh_data_size;
     114             :     uint32_t        nh_flags;
     115             :     int             nh_vrf;
     116             :     unsigned int    nh_id;
     117             :     unsigned int    nh_rid;
     118             :     unsigned int    nh_users;
     119             :     union {
     120             :         struct {
     121             :             uint16_t        encap_len;
     122             :             uint16_t        encap_family;
     123             :         } nh_encap;
     124             : 
     125             :         struct {
     126             :             unsigned int    tun_sip;
     127             :             unsigned int    tun_dip;
     128             :             uint16_t        tun_encap_len;
     129             :             uint32_t        transport_label;
     130             :         } nh_gre_tun;
     131             : 
     132             :         struct nh_udp_tun_ {
     133             :             unsigned int    tun_sip;
     134             :             unsigned int    tun_dip;
     135             :             unsigned short  tun_sport;
     136             :             unsigned short  tun_dport;
     137             :             uint16_t        tun_encap_len;
     138             :             uint32_t        transport_label;
     139             :         } nh_udp_tun;
     140             : 
     141             :         struct {
     142             :             struct nh_udp_tun_ udp_tun;
     143             :             uint8_t         tun_l3_mac[VR_ETHER_ALEN];
     144             :         } nh_vxlan_tun;
     145             : 
     146             :         struct {
     147             :             int             tun_pbb_label;
     148             :             uint8_t         tun_pbb_mac[VR_ETHER_ALEN];
     149             :         } nh_pbb_tun;
     150             : 
     151             :         struct {
     152             :              uint8_t        *tun_sip6;
     153             :              uint8_t        *tun_dip6;
     154             :              unsigned short tun_sport6;
     155             :              unsigned short tun_dport6;
     156             :              uint16_t       tun_encap_len;
     157             :         } nh_udp_tun6;
     158             : 
     159             :         struct {
     160             :             unsigned short cnt;
     161             :             unsigned short ecmp_cnt;
     162             :             unsigned short ecmp_config_hash;
     163             :             struct vr_component_nh *component;
     164             :             struct vr_component_nh *ecmp_active;
     165             :         } nh_composite;
     166             : 
     167             :     } nh_u;
     168             : 
     169             :     struct vrouter      *nh_router;
     170             :     struct vr_nexthop   *nh_direct_nh;
     171             :     int                 (*nh_validate_src)(struct vr_packet *,
     172             :                                            struct vr_nexthop *,
     173             :                                            struct vr_forwarding_md *,
     174             :                                            void *);
     175             :     nh_processing_t     (*nh_reach_nh)(struct vr_packet *,
     176             :                                        struct vr_nexthop *,
     177             :                                        struct vr_forwarding_md *);
     178             :     struct vr_interface *nh_crypt_dev;
     179             :     void                (*nh_destructor)(struct vr_nexthop *);
     180             :     struct vr_interface *nh_dev_arr[VR_MAX_PHY_INF];
     181             :     uint8_t             nh_encap_valid[VR_MAX_PHY_INF];
     182             :     struct vr_interface *nh_valid_underlay_dev[VR_MAX_PHY_INF];
     183             :     int                 nh_valid_underlay_dev_count;
     184             :     uint8_t             nh_data[];
     185             : };
     186             : 
     187             : #define nh_dev                  nh_dev_arr[0]
     188             : #define nh_encap_family         nh_u.nh_encap.encap_family
     189             : #define nh_encap_len            nh_u.nh_encap.encap_len
     190             : 
     191             : #define nh_gre_tun_sip          nh_u.nh_gre_tun.tun_sip
     192             : #define nh_gre_tun_dip          nh_u.nh_gre_tun.tun_dip
     193             : #define nh_gre_tun_label        nh_u.nh_gre_tun.transport_label
     194             : 
     195             : #define nh_udp_tun_sip          nh_u.nh_udp_tun.tun_sip
     196             : #define nh_udp_tun_dip          nh_u.nh_udp_tun.tun_dip
     197             : #define nh_udp_tun_sport        nh_u.nh_udp_tun.tun_sport
     198             : #define nh_udp_tun_dport        nh_u.nh_udp_tun.tun_dport
     199             : #define nh_udp_tun_encap_len    nh_u.nh_udp_tun.tun_encap_len
     200             : #define nh_udp_tun_label        nh_u.nh_udp_tun.transport_label
     201             : 
     202             : #define nh_udp_tun6_sip         nh_u.nh_udp_tun6.tun_sip6
     203             : #define nh_udp_tun6_dip         nh_u.nh_udp_tun6.tun_dip6
     204             : #define nh_udp_tun6_sport       nh_u.nh_udp_tun6.tun_sport6
     205             : #define nh_udp_tun6_dport       nh_u.nh_udp_tun6.tun_dport6
     206             : #define nh_udp_tun6_encap_len   nh_u.nh_udp_tun6.tun_encap_len
     207             : 
     208             : #define nh_gre_tun_encap_len    nh_u.nh_gre_tun.tun_encap_len
     209             : 
     210             : #define nh_component_cnt        nh_u.nh_composite.cnt
     211             : #define nh_component_nh         nh_u.nh_composite.component
     212             : #define nh_component_ecmp_cnt   nh_u.nh_composite.ecmp_cnt
     213             : #define nh_component_ecmp       nh_u.nh_composite.ecmp_active
     214             : #define nh_ecmp_config_hash     nh_u.nh_composite.ecmp_config_hash
     215             : 
     216             : #define nh_pbb_mac         nh_u.nh_pbb_tun.tun_pbb_mac
     217             : #define nh_pbb_label       nh_u.nh_pbb_tun.tun_pbb_label
     218             : 
     219             : #define nh_vxlan_tun_sip        nh_u.nh_vxlan_tun.udp_tun.tun_sip
     220             : #define nh_vxlan_tun_dip        nh_u.nh_vxlan_tun.udp_tun.tun_dip
     221             : #define nh_vxlan_tun_encap_len  nh_u.nh_vxlan_tun.udp_tun.tun_encap_len
     222             : #define nh_vxlan_tun_l3_mac     nh_u.nh_vxlan_tun.tun_l3_mac
     223             : 
     224             : static inline bool
     225           0 : vr_nexthop_is_vcp(struct vr_nexthop *nh)
     226             : {
     227           0 :     if (nh && (nh->nh_type == NH_RESOLVE))
     228           0 :         return true;
     229             : 
     230           0 :     return false;
     231             : }
     232             : 
     233             : extern int vr_nexthop_init(struct vrouter *);
     234             : extern void vr_nexthop_exit(struct vrouter *, bool);
     235             : extern struct vr_nexthop *__vrouter_get_nexthop(struct vrouter *, unsigned int);
     236             : extern struct vr_nexthop *vrouter_get_nexthop(unsigned int, unsigned int);
     237             : extern void vrouter_put_nexthop(struct vr_nexthop *);
     238             : extern int vr_ip_rcv(struct vrouter *, struct vr_packet *,
     239             :         struct vr_forwarding_md *);
     240             : extern int nh_output(struct vr_packet *,
     241             :         struct vr_nexthop *, struct vr_forwarding_md *);
     242             : extern int vr_nexthop_add(vr_nexthop_req *);
     243             : extern int vr_nexthop_get(vr_nexthop_req *);
     244             : extern int vr_nexthop_dump(vr_nexthop_req *);
     245             : extern bool vr_gateway_nexthop(struct vr_nexthop *);
     246             : extern bool vr_hosted_nexthop(struct vr_nexthop *);
     247             : extern unsigned int vr_nexthop_req_get_size(void *);
     248             : extern int vr_is_local_ecmp_nh(struct vr_nexthop *nh);
     249             : extern struct vr_interface *vr_get_ecmp_first_member_dev(struct vr_nexthop *nh);
     250             : 
     251             : extern struct vr_nexthop *vr_discard_nh;
     252             : 
     253             : extern nh_processing_t nh_discard(struct vr_packet *pkt, struct vr_nexthop *nh,
     254             :            struct vr_forwarding_md *fmd);
     255             : 
     256             : /* returns whether nexthop is currently being edited by vr_nexthop_add and thus
     257             :  * may be in inconsistent state */
     258          82 : static inline bool vr_nexthop_is_being_edited(const struct vr_nexthop *nh) {
     259          82 :     return nh->nh_reach_nh == nh_discard && nh->nh_type != NH_DISCARD;
     260             : }
     261             : 
     262             : #ifdef __cplusplus
     263             : }
     264             : #endif
     265             : 
     266             : #endif /* __VNSW_NEXTHOP_H__ */