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32 #ifndef _NET_IF_PRIVATE_H_
33 #define _NET_IF_PRIVATE_H_
37 * Structure defining a network interface.
40 /* General book keeping of interface lists. */
41 CK_STAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained (CK_) */
42 LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */
43 CK_STAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if (CK_) */
44 /* protected by if_addr_lock */
45 u_char if_alloctype; /* if_type at time of allocation */
46 uint8_t if_numa_domain; /* NUMA domain of device */
47 /* Driver and protocol specific information that remains stable. */
48 void *if_softc; /* pointer to driver state */
49 void *if_llsoftc; /* link layer softc */
50 void *if_l2com; /* pointer to protocol bits */
51 const char *if_dname; /* driver name */
52 int if_dunit; /* unit or IF_DUNIT_NONE */
53 u_short if_index; /* numeric abbreviation for this if */
54 u_short if_idxgen; /* ... and its generation count */
55 char if_xname[IFNAMSIZ]; /* external name (name + unit) */
56 char *if_description; /* interface description */
58 /* Variable fields that are touched by the stack and drivers. */
59 int if_flags; /* up/down, broadcast, etc. */
60 int if_drv_flags; /* driver-managed status flags */
61 int if_capabilities; /* interface features & capabilities */
62 int if_capabilities2; /* part 2 */
63 int if_capenable; /* enabled features & capabilities */
64 int if_capenable2; /* part 2 */
65 void *if_linkmib; /* link-type-specific MIB data */
66 size_t if_linkmiblen; /* length of above data */
67 u_int if_refcount; /* reference count */
69 /* These fields are shared with struct if_data. */
70 uint8_t if_type; /* ethernet, tokenring, etc */
71 uint8_t if_addrlen; /* media address length */
72 uint8_t if_hdrlen; /* media header length */
73 uint8_t if_link_state; /* current link state */
74 uint32_t if_mtu; /* maximum transmission unit */
75 uint32_t if_metric; /* routing metric (external only) */
76 uint64_t if_baudrate; /* linespeed */
77 uint64_t if_hwassist; /* HW offload capabilities, see IFCAP */
78 time_t if_epoch; /* uptime at attach or stat reset */
79 struct timeval if_lastchange; /* time of last administrative change */
81 struct ifaltq if_snd; /* output queue (includes altq) */
82 struct task if_linktask; /* task for link change events */
83 struct task if_addmultitask; /* task for SIOCADDMULTI */
85 /* Addresses of different protocol families assigned to this if. */
86 struct mtx if_addr_lock; /* lock to protect address lists */
88 * if_addrhead is the list of all addresses associated to
90 * Some code in the kernel assumes that first element
91 * of the list has type AF_LINK, and contains sockaddr_dl
92 * addresses which store the link-level address and the name
94 * However, access to the AF_LINK address through this
95 * field is deprecated. Use if_addr instead.
97 struct ifaddrhead if_addrhead; /* linked list of addresses per if */
98 struct ifmultihead if_multiaddrs; /* multicast addresses configured */
99 int if_amcount; /* number of all-multicast requests */
100 struct ifaddr *if_addr; /* pointer to link-level address */
101 void *if_hw_addr; /* hardware link-level address */
102 const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
103 struct mtx if_afdata_lock;
104 void *if_afdata[AF_MAX];
105 int if_afdata_initialized;
107 /* Additional features hung off the interface. */
108 u_int if_fib; /* interface FIB */
109 struct vnet *if_vnet; /* pointer to network stack instance */
110 struct vnet *if_home_vnet; /* where this ifnet originates from */
111 struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */
112 struct bpf_if *if_bpf; /* packet filter structure */
113 int if_pcount; /* number of promiscuous listeners */
114 void *if_bridge; /* bridge glue */
115 void *if_lagg; /* lagg glue */
116 void *if_pf_kif; /* pf glue */
117 struct carp_if *if_carp; /* carp interface structure */
118 struct label *if_label; /* interface MAC label */
119 struct netmap_adapter *if_netmap; /* netmap(4) softc */
121 /* Various procedures of the layer2 encapsulation and drivers. */
122 if_output_fn_t if_output; /* output routine (enqueue) */
123 if_input_fn_t if_input; /* input routine (from h/w driver) */
124 struct mbuf *(*if_bridge_input)(struct ifnet *, struct mbuf *);
125 int (*if_bridge_output)(struct ifnet *, struct mbuf *, struct sockaddr *,
127 void (*if_bridge_linkstate)(struct ifnet *ifp);
128 if_start_fn_t if_start; /* initiate output routine */
129 if_ioctl_fn_t if_ioctl; /* ioctl routine */
130 if_init_fn_t if_init; /* Init routine */
131 int (*if_resolvemulti) /* validate/resolve multicast */
132 (struct ifnet *, struct sockaddr **, struct sockaddr *);
133 if_qflush_fn_t if_qflush; /* flush any queue */
134 if_transmit_fn_t if_transmit; /* initiate output routine */
136 if_reassign_fn_t if_reassign; /* reassign to vnet routine */
137 if_get_counter_t if_get_counter; /* get counter values */
138 int (*if_requestencap) /* make link header from request */
139 (struct ifnet *, struct if_encap_req *);
142 counter_u64_t if_counters[IFCOUNTERS];
144 /* Stuff that's only temporary and doesn't belong here. */
147 * Network adapter TSO limits:
148 * ===========================
150 * If the "if_hw_tsomax" field is zero the maximum segment
151 * length limit does not apply. If the "if_hw_tsomaxsegcount"
152 * or the "if_hw_tsomaxsegsize" field is zero the TSO segment
153 * count limit does not apply. If all three fields are zero,
154 * there is no TSO limit.
156 * NOTE: The TSO limits should reflect the values used in the
157 * BUSDMA tag a network adapter is using to load a mbuf chain
158 * for transmission. The TCP/IP network stack will subtract
159 * space for all linklevel and protocol level headers and
160 * ensure that the full mbuf chain passed to the network
161 * adapter fits within the given limits.
163 u_int if_hw_tsomax; /* TSO maximum size in bytes */
164 u_int if_hw_tsomaxsegcount; /* TSO maximum segment count */
165 u_int if_hw_tsomaxsegsize; /* TSO maximum segment size in bytes */
168 * Network adapter send tag support:
170 if_snd_tag_alloc_t *if_snd_tag_alloc;
172 /* Ratelimit (packet pacing) */
173 if_ratelimit_query_t *if_ratelimit_query;
174 if_ratelimit_setup_t *if_ratelimit_setup;
180 * Debugnet (Netdump) hooks to be called while in db/panic.
182 struct debugnet_methods *if_debugnet_methods;
183 struct epoch_context if_epoch_ctx;
186 * Spare fields to be added before branching a stable branch, so
187 * that structure can be enhanced without changing the kernel
190 int if_ispare[4]; /* general use */
193 #define IF_AFDATA_LOCK_INIT(ifp) \
194 mtx_init(&(ifp)->if_afdata_lock, "if_afdata", NULL, MTX_DEF)
196 #define IF_AFDATA_WLOCK(ifp) mtx_lock(&(ifp)->if_afdata_lock)
197 #define IF_AFDATA_WUNLOCK(ifp) mtx_unlock(&(ifp)->if_afdata_lock)
198 #define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp)
199 #define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp)
200 #define IF_AFDATA_TRYLOCK(ifp) mtx_trylock(&(ifp)->if_afdata_lock)
201 #define IF_AFDATA_DESTROY(ifp) mtx_destroy(&(ifp)->if_afdata_lock)
203 #define IF_AFDATA_LOCK_ASSERT(ifp) MPASS(in_epoch(net_epoch_preempt) || mtx_owned(&(ifp)->if_afdata_lock))
204 #define IF_AFDATA_WLOCK_ASSERT(ifp) mtx_assert(&(ifp)->if_afdata_lock, MA_OWNED)
205 #define IF_AFDATA_UNLOCK_ASSERT(ifp) mtx_assert(&(ifp)->if_afdata_lock, MA_NOTOWNED)
207 #define IF_LLADDR(ifp) \
208 LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr))
212 #endif /* _NET_IF_PRIVATE_H_ */