124 static int arp_constructor(struct neighbour *neigh);
125 static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb);
126 static void arp_error_report(struct neighbour *neigh, struct sk_buff *skb);
218 static bool arp_key_eq(const struct neighbour *neigh, const void *pkey)  in arp_key_eq()  argument
220 	return neigh_key_eq32(neigh, pkey);  in arp_key_eq()
223 static int arp_constructor(struct neighbour *neigh)  in arp_constructor()  argument
226 	struct net_device *dev = neigh->dev;  in arp_constructor()
232 		memcpy(neigh->primary_key, &inaddr_any, arp_tbl.key_len);  in arp_constructor()
234 	addr = *(__be32 *)neigh->primary_key;  in arp_constructor()
242 	neigh->type = inet_addr_type_dev_table(dev_net(dev), dev, addr);  in arp_constructor()
245 	__neigh_parms_put(neigh->parms);  in arp_constructor()
246 	neigh->parms = neigh_parms_clone(parms);  in arp_constructor()
250 		neigh->nud_state = NUD_NOARP;  in arp_constructor()
251 		neigh->ops = &arp_direct_ops;  in arp_constructor()
252 		neigh->output = neigh_direct_output;  in arp_constructor()
269 		if (neigh->type == RTN_MULTICAST) {  in arp_constructor()
270 			neigh->nud_state = NUD_NOARP;  in arp_constructor()
271 			arp_mc_map(addr, neigh->ha, dev, 1);  in arp_constructor()
273 			neigh->nud_state = NUD_NOARP;  in arp_constructor()
274 			memcpy(neigh->ha, dev->dev_addr, dev->addr_len);  in arp_constructor()
275 		} else if (neigh->type == RTN_BROADCAST ||  in arp_constructor()
277 			neigh->nud_state = NUD_NOARP;  in arp_constructor()
278 			memcpy(neigh->ha, dev->broadcast, dev->addr_len);  in arp_constructor()
282 			neigh->ops = &arp_hh_ops;  in arp_constructor()
284 			neigh->ops = &arp_generic_ops;  in arp_constructor()
286 		if (neigh->nud_state & NUD_VALID)  in arp_constructor()
287 			neigh->output = neigh->ops->connected_output;  in arp_constructor()
289 			neigh->output = neigh->ops->output;  in arp_constructor()
294 static void arp_error_report(struct neighbour *neigh, struct sk_buff *skb)  in arp_error_report()  argument
333 static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb)  in arp_solicit()  argument
337 	struct net_device *dev = neigh->dev;  in arp_solicit()
338 	__be32 target = *(__be32 *)neigh->primary_key;  in arp_solicit()
339 	int probes = atomic_read(&neigh->probes);  in arp_solicit()
376 	probes -= NEIGH_VAR(neigh->parms, UCAST_PROBES);  in arp_solicit()
378 		if (!(READ_ONCE(neigh->nud_state) & NUD_VALID))  in arp_solicit()
380 		neigh_ha_snapshot(dst_ha, neigh, dev);  in arp_solicit()
383 		probes -= NEIGH_VAR(neigh->parms, APP_PROBES);  in arp_solicit()
385 			neigh_app_ns(neigh);  in arp_solicit()
1049 	struct neighbour *neigh;  in arp_req_set()  local
1089 	neigh = __neigh_lookup_errno(&arp_tbl, &ip, dev);  in arp_req_set()
1090 	err = PTR_ERR(neigh);  in arp_req_set()
1091 	if (!IS_ERR(neigh)) {  in arp_req_set()
1095 		err = neigh_update(neigh, (r->arp_flags & ATF_COM) ?  in arp_req_set()
1099 		neigh_release(neigh);  in arp_req_set()
1104 static unsigned int arp_state_to_flags(struct neighbour *neigh)  in arp_state_to_flags()  argument
1106 	if (neigh->nud_state&NUD_PERMANENT)  in arp_state_to_flags()
1108 	else if (neigh->nud_state&NUD_VALID)  in arp_state_to_flags()
1121 	struct neighbour *neigh;  in arp_req_get()  local
1124 	neigh = neigh_lookup(&arp_tbl, &ip, dev);  in arp_req_get()
1125 	if (neigh) {  in arp_req_get()
1126 		if (!(READ_ONCE(neigh->nud_state) & NUD_NOARP)) {  in arp_req_get()
1127 			read_lock_bh(&neigh->lock);  in arp_req_get()
1128 			memcpy(r->arp_ha.sa_data, neigh->ha,  in arp_req_get()
1130 			r->arp_flags = arp_state_to_flags(neigh);  in arp_req_get()
1131 			read_unlock_bh(&neigh->lock);  in arp_req_get()
1136 		neigh_release(neigh);  in arp_req_get()
1143 	struct neighbour *neigh = neigh_lookup(&arp_tbl, &ip, dev);  in arp_invalidate()  local
1147 	if (neigh) {  in arp_invalidate()
1148 		if ((READ_ONCE(neigh->nud_state) & NUD_VALID) && !force) {  in arp_invalidate()
1149 			neigh_release(neigh);  in arp_invalidate()
1153 		if (READ_ONCE(neigh->nud_state) & ~NUD_NOARP)  in arp_invalidate()
1154 			err = neigh_update(neigh, NULL, NUD_FAILED,  in arp_invalidate()
1158 		neigh_release(neigh);  in arp_invalidate()
1159 		neigh_remove_one(neigh, tbl);  in arp_invalidate()