/* * Forwarding database * Linux ethernet bridge * * Authors: * Lennert Buytenhek * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "br_private.h" #if defined(CONFIG_BCM_KF_BLOG) && defined(CONFIG_BLOG) #include #endif #if defined(CONFIG_BCM_KF_LOG) #include #endif #if defined(CONFIG_BCM_KF_RUNNER) #if defined(CONFIG_BCM_RDPA) || defined(CONFIG_BCM_RDPA_MODULE) #if defined(CONFIG_BCM_RDPA_BRIDGE) || defined(CONFIG_BCM_RDPA_BRIDGE_MODULE) #include "br_fp.h" #include "br_fp_hooks.h" #endif /* CONFIG_BCM_RDPA_BRIDGE || CONFIG_BCM_RDPA_BRIDGE_MODULE */ #endif /* CONFIG_BCM_RDPA || CONFIG_BCM_RDPA_MODULE */ #endif /* CONFIG_BCM_KF_RUNNER */ #if defined(CONFIG_BCM_KF_WL) #include int (*fdb_check_expired_wl_hook)(unsigned char *addr, struct net_device * net_device) = NULL; int (*fdb_check_expired_dhd_hook)(unsigned char *addr, struct net_device * net_device) = NULL; #endif static struct kmem_cache *br_fdb_cache __read_mostly; static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, const unsigned char *addr, __u16 vid); static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, const unsigned char *addr, u16 vid); static void fdb_notify(struct net_bridge *br, const struct net_bridge_fdb_entry *, int); static u32 fdb_salt __read_mostly; int __init br_fdb_init(void) { br_fdb_cache = kmem_cache_create("bridge_fdb_cache", sizeof(struct net_bridge_fdb_entry), 0, SLAB_HWCACHE_ALIGN, NULL); if (!br_fdb_cache) return -ENOMEM; get_random_bytes(&fdb_salt, sizeof(fdb_salt)); return 0; } void br_fdb_fini(void) { kmem_cache_destroy(br_fdb_cache); } /* if topology_changing then use forward_delay (default 15 sec) * otherwise keep longer (default 5 minutes) */ static inline unsigned long hold_time(const struct net_bridge *br) { #if defined(CONFIG_BCM_KF_BLOG) && defined(CONFIG_BLOG) /* Seems one timer constant in bridge code can serve several different purposes. As we use forward_delay=0, if the code left unchanged, every entry in fdb will expire immidately after a topology change and every packet will flood the local ports for a period of bridge_max_age. This will result in low throughput after boot up. So we decoulpe this timer from forward_delay. */ return br->topology_change ? (15*HZ) : br->ageing_time; #else return br->topology_change ? br->forward_delay : br->ageing_time; #endif } static inline int has_expired(const struct net_bridge *br, const struct net_bridge_fdb_entry *fdb) { #if defined(CONFIG_BCM_KF_BLOG) && defined(CONFIG_BLOG) blog_lock(); if (fdb->fdb_key != BLOG_FDB_KEY_INVALID) blog_query(QUERY_BRIDGEFDB, (void*)fdb, fdb->fdb_key, 0, 0); blog_unlock(); #endif return !fdb->is_static && time_before_eq(fdb->updated + hold_time(br), jiffies); } static inline int br_mac_hash(const unsigned char *mac, __u16 vid) { /* use 1 byte of OUI and 3 bytes of NIC */ u32 key = get_unaligned((u32 *)(mac + 2)); #if defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) vid = 0; #endif return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1); } static void fdb_rcu_free(struct rcu_head *head) { struct net_bridge_fdb_entry *ent = container_of(head, struct net_bridge_fdb_entry, rcu); kmem_cache_free(br_fdb_cache, ent); } /* When a static FDB entry is added, the mac address from the entry is * added to the bridge private HW address list and all required ports * are then updated with the new information. * Called under RTNL. */ static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr) { int err; struct net_bridge_port *p; ASSERT_RTNL(); list_for_each_entry(p, &br->port_list, list) { if (!br_promisc_port(p)) { err = dev_uc_add(p->dev, addr); if (err) goto undo; } } return; undo: list_for_each_entry_continue_reverse(p, &br->port_list, list) { if (!br_promisc_port(p)) dev_uc_del(p->dev, addr); } } /* When a static FDB entry is deleted, the HW address from that entry is * also removed from the bridge private HW address list and updates all * the ports with needed information. * Called under RTNL. */ static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr) { struct net_bridge_port *p; ASSERT_RTNL(); list_for_each_entry(p, &br->port_list, list) { if (!br_promisc_port(p)) dev_uc_del(p->dev, addr); } } #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) && defined(CONFIG_BCM_BRIDGE_MAC_FDB_LIMIT) static int fdb_limit_port_max_check(struct net_bridge_port *port) { if (port->max_port_fdb_entries != 0) { /* Check per port max limit */ if ((port->num_port_fdb_entries+1) > port->max_port_fdb_entries) return -1; } return 0; } /* return 0 if the new learned mac will be one of the reserved mac return -1 if reserved mac num is not set, or the mac will occupy the non-reserved place*/ static int fdb_limit_port_min_check(struct net_bridge_port *port) { if (port->min_port_fdb_entries == 0) return -1; /* Check per port min limit */ if ((port->num_port_fdb_entries+1) > port->min_port_fdb_entries) return -1; return 0; } static int fdb_limit_bridge_check(struct net_bridge *br) { if (br->max_br_fdb_entries != 0) { /* Check per br limit */ if ((br->used_br_fdb_entries+1) > br->max_br_fdb_entries) return -1; } return 0; } static int fdb_limit_check(struct net_bridge *br, struct net_bridge_port *port) { /*if excceeds port max, return fail*/ if(fdb_limit_port_max_check(port)) return -1; /*else if still in port reserved range, return success*/ if(0 == fdb_limit_port_min_check(port)) return 0; /*else depend on bridge max check br->used_br_fdb_entries need to be checked only when port reserved range has been excceeded*/ return fdb_limit_bridge_check(br); } static int fdb_limit_mac_move_check(struct net_bridge *br, struct net_bridge_port *from, struct net_bridge_port *to) { /*if excceed port max, return fail*/ if(fdb_limit_port_max_check(to)) return -1; /*else if the mac has already excceeded the from port's reserved places which means the bridge still has place for the mac*/ if (from->num_port_fdb_entries > from->min_port_fdb_entries) return 0; /*else if still in to port reserved range, return success*/ if(0 == fdb_limit_port_min_check(to)) return 0; /*else depend on bridge max check br->used_br_fdb_entries need to be checked only when port reserved range has been excceeded*/ return fdb_limit_bridge_check(br); } static void fdb_limit_update(struct net_bridge *br, struct net_bridge_port *port, int isAdd) { if (isAdd) { port->num_port_fdb_entries++; if (port->num_port_fdb_entries > port->min_port_fdb_entries) br->used_br_fdb_entries++; } else { BUG_ON(!port->num_port_fdb_entries); port->num_port_fdb_entries--; if (port->num_port_fdb_entries >= port->min_port_fdb_entries) br->used_br_fdb_entries--; } } #endif static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f) { if (f->is_static) fdb_del_hw_addr(br, f->addr.addr); #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) br->num_fdb_entries--; #endif #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) && defined(CONFIG_BCM_BRIDGE_MAC_FDB_LIMIT) if (f->is_local == 0) { fdb_limit_update(br, f->dst, 0); } #endif #if defined(CONFIG_BCM_KF_RUNNER) #if defined(CONFIG_BCM_RDPA) || defined(CONFIG_BCM_RDPA_MODULE) #if defined(CONFIG_BCM_RDPA_BRIDGE) || defined(CONFIG_BCM_RDPA_BRIDGE_MODULE) if (!f->is_local) /* Do not remove local MAC to the Runner */ br_fp_hook(BR_FP_FDB_REMOVE, f, NULL); #endif /* CONFIG_BCM_RDPA_BRIDGE || CONFIG_BCM_RDPA_BRIDGE_MODULE */ #endif /* CONFIG_BCM_RDPA || CONFIG_BCM_RDPA_MODULE */ #endif /* CONFIG_BCM_KF_RUNNER */ hlist_del_rcu(&f->hlist); fdb_notify(br, f, RTM_DELNEIGH); #if defined(CONFIG_BCM_KF_BLOG) && defined(CONFIG_BLOG) blog_lock(); blog_notify_async(DESTROY_BRIDGEFDB, (void*)f, f->fdb_key, 0, NULL, NULL); blog_unlock(); #endif /* CONFIG_BCM_KF_BLOG && CONFIG_BLOG */ call_rcu(&f->rcu, fdb_rcu_free); } /* Delete a local entry if no other port had the same address. */ static void fdb_delete_local(struct net_bridge *br, const struct net_bridge_port *p, struct net_bridge_fdb_entry *f) { const unsigned char *addr = f->addr.addr; u16 vid = f->vlan_id; struct net_bridge_port *op; /* Maybe another port has same hw addr? */ list_for_each_entry(op, &br->port_list, list) { if (op != p && ether_addr_equal(op->dev->dev_addr, addr) && (!vid || nbp_vlan_find(op, vid))) { f->dst = op; f->added_by_user = 0; return; } } /* Maybe bridge device has same hw addr? */ if (p && ether_addr_equal(br->dev->dev_addr, addr) && (!vid || br_vlan_find(br, vid))) { f->dst = NULL; f->added_by_user = 0; return; } fdb_delete(br, f); } void br_fdb_find_delete_local(struct net_bridge *br, const struct net_bridge_port *p, const unsigned char *addr, u16 vid) { struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; struct net_bridge_fdb_entry *f; spin_lock_bh(&br->hash_lock); f = fdb_find(head, addr, vid); if (f && f->is_local && !f->added_by_user && f->dst == p) fdb_delete_local(br, p, f); spin_unlock_bh(&br->hash_lock); } void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) { struct net_bridge *br = p->br; struct net_port_vlans *pv = nbp_get_vlan_info(p); bool no_vlan = !pv; int i; u16 vid; spin_lock_bh(&br->hash_lock); /* Search all chains since old address/hash is unknown */ for (i = 0; i < BR_HASH_SIZE; i++) { struct hlist_node *h; hlist_for_each(h, &br->hash[i]) { struct net_bridge_fdb_entry *f; f = hlist_entry(h, struct net_bridge_fdb_entry, hlist); if (f->dst == p && f->is_local && !f->added_by_user) { /* delete old one */ fdb_delete_local(br, p, f); /* if this port has no vlan information * configured, we can safely be done at * this point. */ if (no_vlan) goto insert; } } } insert: /* insert new address, may fail if invalid address or dup. */ fdb_insert(br, p, newaddr, 0); if (no_vlan) goto done; /* Now add entries for every VLAN configured on the port. * This function runs under RTNL so the bitmap will not change * from under us. */ for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) fdb_insert(br, p, newaddr, vid); done: spin_unlock_bh(&br->hash_lock); } void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) { struct net_bridge_fdb_entry *f; struct net_port_vlans *pv; u16 vid = 0; spin_lock_bh(&br->hash_lock); /* If old entry was unassociated with any port, then delete it. */ f = __br_fdb_get(br, br->dev->dev_addr, 0); if (f && f->is_local && !f->dst) fdb_delete_local(br, NULL, f); fdb_insert(br, NULL, newaddr, 0); /* Now remove and add entries for every VLAN configured on the * bridge. This function runs under RTNL so the bitmap will not * change from under us. */ pv = br_get_vlan_info(br); if (!pv) goto out; for_each_set_bit_from(vid, pv->vlan_bitmap, VLAN_N_VID) { f = __br_fdb_get(br, br->dev->dev_addr, vid); if (f && f->is_local && !f->dst) fdb_delete_local(br, NULL, f); fdb_insert(br, NULL, newaddr, vid); } out: spin_unlock_bh(&br->hash_lock); } void br_fdb_cleanup(unsigned long _data) { struct net_bridge *br = (struct net_bridge *)_data; unsigned long delay = hold_time(br); unsigned long next_timer = jiffies + br->ageing_time; int i; spin_lock(&br->hash_lock); for (i = 0; i < BR_HASH_SIZE; i++) { struct net_bridge_fdb_entry *f; struct hlist_node *n; hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { unsigned long this_timer; if (f->is_static) continue; #if defined(CONFIG_BCM_KF_BLOG) && defined(CONFIG_BLOG) blog_lock(); if (f->fdb_key != BLOG_FDB_KEY_INVALID) blog_query(QUERY_BRIDGEFDB, (void*)f, f->fdb_key, 0, 0); blog_unlock(); #endif this_timer = f->updated + delay; if (time_before_eq(this_timer, jiffies)) #if defined(CONFIG_BCM_KF_RUNNER) || defined(CONFIG_BCM_KF_WL) { int flag = 0; struct net_device * dev_p; dev_p = ((f->dst == NULL) || (f->dst->dev == NULL)) ? NULL : f->dst->dev; #if (defined(CONFIG_BCM_RDPA) || defined(CONFIG_BCM_RDPA_MODULE)) && (defined(CONFIG_BCM_RDPA_BRIDGE) || defined(CONFIG_BCM_RDPA_BRIDGE_MODULE)) br_fp_hook(BR_FP_FDB_CHECK_AGE, f, &flag); #endif /* CONFIG_BCM_RDPA && CONFIG_BCM_RDPA_BRIDGE && CONFIG_BCM_RDPA_BRIDGE_MODULE */ if (flag #if defined(CONFIG_BCM_KF_WL) || (fdb_check_expired_wl_hook && (fdb_check_expired_wl_hook(f->addr.addr, dev_p) == 0)) || (fdb_check_expired_dhd_hook && (fdb_check_expired_dhd_hook(f->addr.addr, dev_p) == 0)) #endif ) { f->updated = jiffies; } else fdb_delete(br, f); } #else fdb_delete(br, f); #endif else if (time_before(this_timer, next_timer)) next_timer = this_timer; } } spin_unlock(&br->hash_lock); mod_timer(&br->gc_timer, round_jiffies_up(next_timer)); } /* Completely flush all dynamic entries in forwarding database.*/ void br_fdb_flush(struct net_bridge *br) { int i; spin_lock_bh(&br->hash_lock); for (i = 0; i < BR_HASH_SIZE; i++) { struct net_bridge_fdb_entry *f; struct hlist_node *n; hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { if (!f->is_static) #if defined(CONFIG_BCM_KF_RUNNER) && (defined(CONFIG_BCM_RDPA) || defined(CONFIG_BCM_RDPA_MODULE)) && (defined(CONFIG_BCM_RDPA_BRIDGE) || defined(CONFIG_BCM_RDPA_BRIDGE_MODULE)) { int flag = 0; br_fp_hook(BR_FP_FDB_CHECK_AGE, f, &flag); if (flag) { f->updated = jiffies; } else { fdb_delete(br, f); } } #else /* CONFIG_BCM_KF_RUNNER && CONFIG_BCM_RUNNER && (CONFIG_BCM_RDPA_BRIDGE || CONFIG_BCM_RDPA_BRIDGE_MODULE) */ fdb_delete(br, f); #endif /* CONFIG_BCM_KF_RUNNER && CONFIG_BCM_RUNNER && (CONFIG_BCM_RDPA_BRIDGE || CONFIG_BCM_RDPA_BRIDGE_MODULE) */ } } spin_unlock_bh(&br->hash_lock); } /* Flush all entries referring to a specific port. * if do_all is set also flush static entries */ void br_fdb_delete_by_port(struct net_bridge *br, const struct net_bridge_port *p, int do_all) { int i; spin_lock_bh(&br->hash_lock); for (i = 0; i < BR_HASH_SIZE; i++) { struct hlist_node *h, *g; hlist_for_each_safe(h, g, &br->hash[i]) { struct net_bridge_fdb_entry *f = hlist_entry(h, struct net_bridge_fdb_entry, hlist); if (f->dst != p) continue; if (f->is_static && !do_all) continue; if (f->is_local) fdb_delete_local(br, p, f); else fdb_delete(br, f); } } spin_unlock_bh(&br->hash_lock); } #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) && defined(CONFIG_BCM_BRIDGE_MAC_FDB_LIMIT) /* Set FDB limit lmtType 0: Bridge limit 1: Port limit */ int br_set_fdb_limit(struct net_bridge *br, struct net_bridge_port *p, int lmt_type, int is_min, int fdb_limit) { int new_used_fdb; if((br == NULL) || ((p == NULL) && lmt_type)) return -EINVAL; if(fdb_limit == 0) { /* Disable limit */ if(lmt_type == 0) { br->max_br_fdb_entries = 0; } else if(is_min) { if (p->num_port_fdb_entries < p->min_port_fdb_entries) { new_used_fdb = br->used_br_fdb_entries - p->min_port_fdb_entries; new_used_fdb += p->num_port_fdb_entries; br->used_br_fdb_entries = new_used_fdb; } p->min_port_fdb_entries = 0; } else { p->max_port_fdb_entries = 0; } } else { if(lmt_type == 0) { if(br->used_br_fdb_entries > fdb_limit) return -EINVAL; br->max_br_fdb_entries = fdb_limit; } else if(is_min) { new_used_fdb = max(p->num_port_fdb_entries, p->min_port_fdb_entries); new_used_fdb = br->used_br_fdb_entries - new_used_fdb; new_used_fdb += max(p->num_port_fdb_entries, fdb_limit); if ( (br->max_br_fdb_entries != 0) && (new_used_fdb > br->max_br_fdb_entries) ) return -EINVAL; p->min_port_fdb_entries = fdb_limit; br->used_br_fdb_entries = new_used_fdb; } else { if(p->num_port_fdb_entries > fdb_limit) return -EINVAL; p->max_port_fdb_entries = fdb_limit; } } return 0; } #endif /* No locking or refcounting, assumes caller has rcu_read_lock */ #if defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, const unsigned char *addr, __u16 vid __attribute__((unused))) { struct net_bridge_fdb_entry *fdb; hlist_for_each_entry_rcu(fdb, &br->hash[br_mac_hash(addr, vid)], hlist) { if (ether_addr_equal(fdb->addr.addr, addr)) { if (unlikely(has_expired(br, fdb))) break; return fdb; } } return NULL; } #else struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, const unsigned char *addr, __u16 vid) { struct net_bridge_fdb_entry *fdb; hlist_for_each_entry_rcu(fdb, &br->hash[br_mac_hash(addr, vid)], hlist) { if (ether_addr_equal(fdb->addr.addr, addr) && fdb->vlan_id == vid) { if (unlikely(has_expired(br, fdb))) break; return fdb; } } return NULL; } #endif #if IS_ENABLED(CONFIG_ATM_LANE) /* Interface used by ATM LANE hook to test * if an addr is on some other bridge port */ int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) { struct net_bridge_fdb_entry *fdb; struct net_bridge_port *port; int ret; rcu_read_lock(); port = br_port_get_rcu(dev); if (!port) ret = 0; else { fdb = __br_fdb_get(port->br, addr, 0); ret = fdb && fdb->dst && fdb->dst->dev != dev && fdb->dst->state == BR_STATE_FORWARDING; } rcu_read_unlock(); return ret; } #endif /* CONFIG_ATM_LANE */ /* * Fill buffer with forwarding table records in * the API format. */ int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long maxnum, unsigned long skip) { struct __fdb_entry *fe = buf; int i, num = 0; struct net_bridge_fdb_entry *f; memset(buf, 0, maxnum*sizeof(struct __fdb_entry)); rcu_read_lock(); for (i = 0; i < BR_HASH_SIZE; i++) { hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { if (num >= maxnum) goto out; if (has_expired(br, f)) continue; /* ignore pseudo entry for local MAC address */ if (!f->dst) continue; if (skip) { --skip; continue; } /* convert from internal format to API */ memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN); /* due to ABI compat need to split into hi/lo */ fe->port_no = f->dst->port_no; fe->port_hi = f->dst->port_no >> 8; fe->is_local = f->is_local; if (!f->is_static) fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); #if defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) fe->vid = f->vlan_id; #endif ++fe; ++num; } } out: rcu_read_unlock(); return num; } #if defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, const unsigned char *addr, __u16 vid __attribute__((unused))) { struct net_bridge_fdb_entry *fdb; hlist_for_each_entry(fdb, head, hlist) { if (ether_addr_equal(fdb->addr.addr, addr)) return fdb; } return NULL; } static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, const unsigned char *addr, __u16 vid __attribute__((unused))) { struct net_bridge_fdb_entry *fdb; hlist_for_each_entry_rcu(fdb, head, hlist) { if (ether_addr_equal(fdb->addr.addr, addr)) return fdb; } return NULL; } #else static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, const unsigned char *addr, __u16 vid) { struct net_bridge_fdb_entry *fdb; hlist_for_each_entry(fdb, head, hlist) { if (ether_addr_equal(fdb->addr.addr, addr) && fdb->vlan_id == vid) return fdb; } return NULL; } static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, const unsigned char *addr, __u16 vid) { struct net_bridge_fdb_entry *fdb; hlist_for_each_entry_rcu(fdb, head, hlist) { if (ether_addr_equal(fdb->addr.addr, addr) && fdb->vlan_id == vid) return fdb; } return NULL; } #endif /* defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) */ #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) static struct net_bridge_fdb_entry *fdb_create(struct net_bridge *br, struct hlist_head *head, struct net_bridge_port *source, const unsigned char *addr, __u16 vid) #else static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, struct net_bridge_port *source, const unsigned char *addr, __u16 vid) #endif { struct net_bridge_fdb_entry *fdb; #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) if (br->num_fdb_entries >= BR_MAX_FDB_ENTRIES) return NULL; #endif fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); if (fdb) { memcpy(fdb->addr.addr, addr, ETH_ALEN); fdb->dst = source; fdb->vlan_id = vid; fdb->is_local = 0; fdb->is_static = 0; fdb->added_by_user = 0; fdb->added_by_external_learn = 0; fdb->updated = fdb->used = jiffies; #if defined(CONFIG_BCM_KF_BLOG) && defined(CONFIG_BLOG) fdb->fdb_key = BLOG_FDB_KEY_INVALID; #endif #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) br->num_fdb_entries++; #endif hlist_add_head_rcu(&fdb->hlist, head); } return fdb; } static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, const unsigned char *addr, u16 vid) { struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; struct net_bridge_fdb_entry *fdb; if (!is_valid_ether_addr(addr)) return -EINVAL; fdb = fdb_find(head, addr, vid); if (fdb) { /* it is okay to have multiple ports with same * address, just use the first one. */ if (fdb->is_local) return 0; br_warn(br, "adding interface %s with same address " "as a received packet\n", source ? source->dev->name : br->dev->name); fdb_delete(br, fdb); } #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) fdb = fdb_create(br, head, source, addr, vid); #else fdb = fdb_create(head, source, addr, vid); #endif if (!fdb) return -ENOMEM; fdb->is_local = fdb->is_static = 1; fdb_add_hw_addr(br, addr); fdb_notify(br, fdb, RTM_NEWNEIGH); return 0; } /* Add entry for local address of interface */ int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, const unsigned char *addr, u16 vid) { int ret; spin_lock_bh(&br->hash_lock); ret = fdb_insert(br, source, addr, vid); spin_unlock_bh(&br->hash_lock); return ret; } void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, const unsigned char *addr, u16 vid, bool added_by_user) { struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; struct net_bridge_fdb_entry *fdb; bool fdb_modified = false; /* some users want to always flood. */ if (hold_time(br) == 0) return; /* ignore packets unless we are using this port */ if (!(source->state == BR_STATE_LEARNING || source->state == BR_STATE_FORWARDING)) return; fdb = fdb_find_rcu(head, addr, vid); if (likely(fdb)) { /* attempt to update an entry for a local interface */ if (unlikely(fdb->is_local)) { if (net_ratelimit()) br_warn(br, "received packet on %s with " "own address as source address\n", source->dev->name); #if defined(CONFIG_BCM_KF_BRIDGE_STATIC_FDB_MOVE) } else if ( likely (fdb->is_static == 0) ) { /* don't allow static fdb entries to move */ #else } else { #endif #if defined(CONFIG_BCM_KF_RUNNER) #if defined(CONFIG_BCM_RDPA) || defined(CONFIG_BCM_RDPA_MODULE) #if defined(CONFIG_BCM_RDPA_BRIDGE) || defined(CONFIG_BCM_RDPA_BRIDGE_MODULE) struct net_bridge_port *fdb_dst = fdb->dst; #if defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) unsigned int fdb_vid = fdb->vlan_id; #endif /* CONFIG_BCM_KF_VLAN_AGGREGATION && CONFIG_BCM_VLAN_AGGREGATION */ #endif /* CONFIG_BCM_RDPA_BRIDGE || CONFIG_BCM_RDPA_BRIDGE_MODULE */ #endif /* CONFIG_BCM_RUNNER */ #endif /* CONFIG_BCM_KF_RUNNER */ #if defined(CONFIG_BCM_KF_BRIDGE_STATIC_FDB_MOVE) /*TODO find the correct KF */ /* In case of MAC move - let ethernet driver clear switch ARL */ if (fdb->dst && fdb->dst->port_no != source->port_no) { bcmFun_t *ethswClearArlFun; /* Get the switch clear ARL function pointer */ ethswClearArlFun = bcmFun_get(BCM_FUN_IN_ENET_CLEAR_ARL_ENTRY); if ( ethswClearArlFun ) { ethswClearArlFun((void*)addr); } #if defined(CONFIG_BCM_KF_BLOG) && defined(CONFIG_BLOG) blog_lock(); /* Also flush the associated entries in accelerators */ blog_notify_async(DESTROY_BRIDGEFDB, (void*)fdb, fdb->fdb_key, 0, NULL, NULL); blog_unlock(); #endif /* CONFIG_BCM_KF_BLOG && CONFIG_BLOG */ } #endif /* CONFIG_BCM_KF_BRIDGE_STATIC_FDB_MOVE */ /* fastpath: update of existing entry */ if (unlikely(source != fdb->dst)) { #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) && defined(CONFIG_BCM_BRIDGE_MAC_FDB_LIMIT) /* Check that mac can be learned on new port */ if (fdb_limit_mac_move_check(br, fdb->dst, source) != 0) { return; } /* Modify both old and new port counter */ fdb_limit_update(br, fdb->dst, 0); fdb_limit_update(br, source, 1); #endif /* CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT && CONFIG_BCM_BRIDGE_MAC_FDB_LIMIT */ fdb->dst = source; fdb_modified = true; } fdb->updated = jiffies; #if defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) fdb->vlan_id = vid; #endif /* CONFIG_BCM_KF_VLAN_AGGREGATION && CONFIG_BCM_VLAN_AGGREGATION */ #if defined(CONFIG_BCM_KF_RUNNER) #if defined(CONFIG_BCM_RDPA) || defined(CONFIG_BCM_RDPA_MODULE) #if defined(CONFIG_BCM_RDPA_BRIDGE) || defined(CONFIG_BCM_RDPA_BRIDGE_MODULE) #if defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) /* Do not update FastPath if the the source still == dst and vid is same */ if (fdb_dst != source || fdb_vid != vid) br_fp_hook(BR_FP_FDB_MODIFY, fdb, NULL); #else /* Do not update FastPath if the the source still == dst */ if (fdb_dst != source) br_fp_hook(BR_FP_FDB_MODIFY, fdb, NULL); #endif /* CONFIG_BCM_KF_VLAN_AGGREGATION && CONFIG_BCM_VLAN_AGGREGATION */ #endif /* CONFIG_BCM_RDPA_BRIDGE || CONFIG_BCM_RDPA_BRIDGE_MODULE */ #endif /* CONFIG_BCM_RUNNER */ #endif /* CONFIG_BCM_KF_RUNNER */ if (unlikely(added_by_user)) fdb->added_by_user = 1; if (unlikely(fdb_modified)) fdb_notify(br, fdb, RTM_NEWNEIGH); } } else { spin_lock(&br->hash_lock); if (likely(!fdb_find(head, addr, vid))) { #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) && defined(CONFIG_BCM_BRIDGE_MAC_FDB_LIMIT) fdb = NULL; if (fdb_limit_check(br, source) == 0) #endif #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) fdb = fdb_create(br, head, source, addr, vid); #else fdb = fdb_create(head, source, addr, vid); #endif if (fdb) { if (unlikely(added_by_user)) fdb->added_by_user = 1; fdb_notify(br, fdb, RTM_NEWNEIGH); #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) /* In case of new MAC - let ethernet driver clear switch ARL */ if (fdb->dst) { bcmFun_t *ethswClearArlFun; /* Get the switch clear ARL function pointer */ ethswClearArlFun = bcmFun_get(BCM_FUN_IN_ENET_CLEAR_ARL_ENTRY); if ( ethswClearArlFun ) { struct net_device *dev = fdb->dst->dev; while( !netdev_path_is_root(dev) ) // find root device dev = netdev_path_next_dev(dev); if (!(dev->priv_flags & IFF_EXT_SWITCH)) // clear if root device is not on ext_switch ethswClearArlFun((void*)addr); } } #endif /* CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT */ #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) && defined(CONFIG_BCM_BRIDGE_MAC_FDB_LIMIT) fdb_limit_update(br, source, 1); #endif #if defined(CONFIG_BCM_KF_RUNNER) #if defined(CONFIG_BCM_RDPA) || defined(CONFIG_BCM_RDPA_MODULE) #if defined(CONFIG_BCM_RDPA_BRIDGE) || defined(CONFIG_BCM_RDPA_BRIDGE_MODULE) br_fp_hook(BR_FP_FDB_ADD, fdb, NULL); #endif /* CONFIG_BCM_RDPA_BRIDGE || CONFIG_BCM_RDPA_BRIDGE_MODULE */ #endif /* CONFIG_BCM_RUNNER */ #endif /* CONFIG_BCM_KF_RUNNER */ } } /* else we lose race and someone else inserts * it first, don't bother updating */ spin_unlock(&br->hash_lock); } } static int fdb_to_nud(const struct net_bridge_fdb_entry *fdb) { if (fdb->is_local) return NUD_PERMANENT; else if (fdb->is_static) return NUD_NOARP; else if (has_expired(fdb->dst->br, fdb)) return NUD_STALE; else return NUD_REACHABLE; } static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, const struct net_bridge_fdb_entry *fdb, u32 portid, u32 seq, int type, unsigned int flags) { unsigned long now = jiffies; struct nda_cacheinfo ci; struct nlmsghdr *nlh; struct ndmsg *ndm; nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); if (nlh == NULL) return -EMSGSIZE; ndm = nlmsg_data(nlh); ndm->ndm_family = AF_BRIDGE; ndm->ndm_pad1 = 0; ndm->ndm_pad2 = 0; ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0; ndm->ndm_type = 0; ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; ndm->ndm_state = fdb_to_nud(fdb); if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr)) goto nla_put_failure; if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex)) goto nla_put_failure; ci.ndm_used = jiffies_to_clock_t(now - fdb->used); ci.ndm_confirmed = 0; #if defined(CONFIG_BCM_KF_BLOG) && defined(CONFIG_BLOG) blog_lock(); if (fdb->fdb_key != BLOG_FDB_KEY_INVALID) blog_query(QUERY_BRIDGEFDB, (void*)fdb, fdb->fdb_key, 0, 0); blog_unlock(); #endif ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); ci.ndm_refcnt = 0; if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) goto nla_put_failure; if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id)) goto nla_put_failure; nlmsg_end(skb, nlh); return 0; nla_put_failure: nlmsg_cancel(skb, nlh); return -EMSGSIZE; } static inline size_t fdb_nlmsg_size(void) { return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ + nla_total_size(sizeof(u32)) /* NDA_MASTER */ + nla_total_size(sizeof(u16)) /* NDA_VLAN */ + nla_total_size(sizeof(struct nda_cacheinfo)); } static void fdb_notify(struct net_bridge *br, const struct net_bridge_fdb_entry *fdb, int type) { struct net *net = dev_net(br->dev); struct sk_buff *skb; int err = -ENOBUFS; skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); if (skb == NULL) goto errout; err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); if (err < 0) { /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */ WARN_ON(err == -EMSGSIZE); kfree_skb(skb); goto errout; } rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); return; errout: rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); } /* Dump information about entries, in response to GETNEIGH */ int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, struct net_device *dev, struct net_device *filter_dev, int idx) { struct net_bridge *br = netdev_priv(dev); int i; if (!(dev->priv_flags & IFF_EBRIDGE)) goto out; if (!filter_dev) idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); for (i = 0; i < BR_HASH_SIZE; i++) { struct net_bridge_fdb_entry *f; hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { if (idx < cb->args[0]) goto skip; if (filter_dev && (!f->dst || f->dst->dev != filter_dev)) { if (filter_dev != dev) goto skip; /* !f->dst is a special case for bridge * It means the MAC belongs to the bridge * Therefore need a little more filtering * we only want to dump the !f->dst case */ if (f->dst) goto skip; } if (!filter_dev && f->dst) goto skip; if (fdb_fill_info(skb, br, f, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, RTM_NEWNEIGH, NLM_F_MULTI) < 0) break; skip: ++idx; } } out: return idx; } /* Update (create or replace) forwarding database entry */ static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, __u16 state, __u16 flags, __u16 vid) { struct net_bridge *br = source->br; struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; struct net_bridge_fdb_entry *fdb; bool modified = false; fdb = fdb_find(head, addr, vid); if (fdb == NULL) { if (!(flags & NLM_F_CREATE)) return -ENOENT; #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) && defined(CONFIG_BCM_BRIDGE_MAC_FDB_LIMIT) fdb = NULL; if ((state & NUD_PERMANENT) || (fdb_limit_check(br, source) == 0)) #endif #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) fdb = fdb_create(br, head, source, addr, vid); #else fdb = fdb_create(head, source, addr, vid); #endif if (!fdb) return -ENOMEM; #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) && defined(CONFIG_BCM_BRIDGE_MAC_FDB_LIMIT) if (!(state & NUD_PERMANENT)) { fdb_limit_update(br, source, 1); } #endif #if defined(CONFIG_BCM_KF_RUNNER) #if defined(CONFIG_BCM_RDPA) || defined(CONFIG_BCM_RDPA_MODULE) #if defined(CONFIG_BCM_RDPA_BRIDGE) || defined(CONFIG_BCM_RDPA_BRIDGE_MODULE) if (!(state & NUD_PERMANENT)) { br_fp_hook(BR_FP_FDB_ADD, fdb, NULL); } #endif /* CONFIG_BCM_RDPA_BRIDGE || CONFIG_BCM_RDPA_BRIDGE_MODULE */ #endif /* CONFIG_BCM_RUNNER */ #endif /* CONFIG_BCM_KF_RUNNER */ modified = true; } else { if (flags & NLM_F_EXCL) return -EEXIST; #if defined(CONFIG_BCM_KF_RUNNER) #if defined(CONFIG_BCM_RDPA) || defined(CONFIG_BCM_RDPA_MODULE) #if defined(CONFIG_BCM_RDPA_BRIDGE) || defined(CONFIG_BCM_RDPA_BRIDGE_MODULE) #if defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) /* Do not update FastPath if the the source still == dst and vid is same */ if (fdb->dst != source || fdb->vlan_id != vid) br_fp_hook(BR_FP_FDB_MODIFY, fdb, NULL); #else /* Do not update FastPath if the the source still == dst */ if (fdb->dst != source) br_fp_hook(BR_FP_FDB_MODIFY, fdb, NULL); #endif /* CONFIG_BCM_KF_VLAN_AGGREGATION && CONFIG_BCM_VLAN_AGGREGATION */ #endif /* CONFIG_BCM_RDPA_BRIDGE || CONFIG_BCM_RDPA_BRIDGE_MODULE */ #endif /* CONFIG_BCM_RUNNER */ #endif /* CONFIG_BCM_KF_RUNNER */ if (fdb->dst != source) { #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) && defined(CONFIG_BCM_BRIDGE_MAC_FDB_LIMIT) if ( !fdb->is_local ) { /* Check that mac can be learned on new port */ if (fdb_limit_mac_move_check(br, fdb->dst, source) != 0) { return -EEXIST; } /* Modify both of old and new port counter */ fdb_limit_update(br, fdb->dst, 0); fdb_limit_update(br, source, 1); } #endif /* CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT && CONFIG_BCM_BRIDGE_MAC_FDB_LIMIT */ fdb->dst = source; modified = true; } } #if defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) fdb->vlan_id = vid; #endif /* CONFIG_BCM_KF_VLAN_AGGREGATION && CONFIG_BCM_VLAN_AGGREGATION */ if (fdb_to_nud(fdb) != state) { if (state & NUD_PERMANENT) { fdb->is_local = 1; if (!fdb->is_static) { fdb->is_static = 1; fdb_add_hw_addr(br, addr); } } else if (state & NUD_NOARP) { fdb->is_local = 0; if (!fdb->is_static) { fdb->is_static = 1; fdb_add_hw_addr(br, addr); } } else { fdb->is_local = 0; if (fdb->is_static) { fdb->is_static = 0; fdb_del_hw_addr(br, addr); } } modified = true; } fdb->added_by_user = 1; fdb->used = jiffies; if (modified) { fdb->updated = jiffies; fdb_notify(br, fdb, RTM_NEWNEIGH); } return 0; } static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p, const unsigned char *addr, u16 nlh_flags, u16 vid) { int err = 0; if (ndm->ndm_flags & NTF_USE) { local_bh_disable(); rcu_read_lock(); br_fdb_update(p->br, p, addr, vid, true); rcu_read_unlock(); local_bh_enable(); } else { spin_lock_bh(&p->br->hash_lock); err = fdb_add_entry(p, addr, ndm->ndm_state, nlh_flags, vid); spin_unlock_bh(&p->br->hash_lock); } return err; } /* Add new permanent fdb entry with RTM_NEWNEIGH */ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, const unsigned char *addr, u16 vid, u16 nlh_flags) { struct net_bridge_port *p; int err = 0; struct net_port_vlans *pv; if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); return -EINVAL; } if (is_zero_ether_addr(addr)) { pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n"); return -EINVAL; } p = br_port_get_rtnl(dev); if (p == NULL) { pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", dev->name); return -EINVAL; } pv = nbp_get_vlan_info(p); if (vid) { if (!pv || !test_bit(vid, pv->vlan_bitmap)) { pr_info("bridge: RTM_NEWNEIGH with unconfigured " "vlan %d on port %s\n", vid, dev->name); return -EINVAL; } /* VID was specified, so use it. */ err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); } else { #if defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) err = __br_fdb_add(ndm, p, addr, nlh_flags, VLAN_N_VID); #else err = __br_fdb_add(ndm, p, addr, nlh_flags, 0); #endif if (err || !pv) goto out; /* We have vlans configured on this port and user didn't * specify a VLAN. To be nice, add/update entry for every * vlan on this port. */ for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); if (err) goto out; } } out: return err; } static int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vlan) { struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)]; struct net_bridge_fdb_entry *fdb; fdb = fdb_find(head, addr, vlan); if (!fdb) return -ENOENT; fdb_delete(br, fdb); return 0; } static int __br_fdb_delete(struct net_bridge_port *p, const unsigned char *addr, u16 vid) { int err; spin_lock_bh(&p->br->hash_lock); err = fdb_delete_by_addr(p->br, addr, vid); spin_unlock_bh(&p->br->hash_lock); return err; } /* Remove neighbor entry with RTM_DELNEIGH */ int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, const unsigned char *addr, u16 vid) { struct net_bridge_port *p; int err; struct net_port_vlans *pv; p = br_port_get_rtnl(dev); if (p == NULL) { pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", dev->name); return -EINVAL; } pv = nbp_get_vlan_info(p); if (vid) { if (!pv || !test_bit(vid, pv->vlan_bitmap)) { pr_info("bridge: RTM_DELNEIGH with unconfigured " "vlan %d on port %s\n", vid, dev->name); return -EINVAL; } err = __br_fdb_delete(p, addr, vid); } else { err = -ENOENT; err &= __br_fdb_delete(p, addr, 0); if (!pv) goto out; /* We have vlans configured on this port and user didn't * specify a VLAN. To be nice, add/update entry for every * vlan on this port. */ for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { err &= __br_fdb_delete(p, addr, vid); } } out: return err; } int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p) { struct net_bridge_fdb_entry *fdb, *tmp; int i; int err; ASSERT_RTNL(); for (i = 0; i < BR_HASH_SIZE; i++) { hlist_for_each_entry(fdb, &br->hash[i], hlist) { /* We only care for static entries */ if (!fdb->is_static) continue; err = dev_uc_add(p->dev, fdb->addr.addr); if (err) goto rollback; } } return 0; rollback: for (i = 0; i < BR_HASH_SIZE; i++) { hlist_for_each_entry(tmp, &br->hash[i], hlist) { /* If we reached the fdb that failed, we can stop */ if (tmp == fdb) break; /* We only care for static entries */ if (!tmp->is_static) continue; dev_uc_del(p->dev, tmp->addr.addr); } } return err; } void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) { struct net_bridge_fdb_entry *fdb; int i; ASSERT_RTNL(); for (i = 0; i < BR_HASH_SIZE; i++) { hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) { /* We only care for static entries */ if (!fdb->is_static) continue; dev_uc_del(p->dev, fdb->addr.addr); } } } int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, const unsigned char *addr, u16 vid) { struct hlist_head *head; struct net_bridge_fdb_entry *fdb; int err = 0; ASSERT_RTNL(); spin_lock_bh(&br->hash_lock); head = &br->hash[br_mac_hash(addr, vid)]; fdb = fdb_find(head, addr, vid); if (!fdb) { #if defined(CONFIG_BCM_KF_BRIDGE_MAC_FDB_LIMIT) fdb = fdb_create(br, head, p, addr, vid); #else fdb = fdb_create(head, p, addr, vid); #endif if (!fdb) { err = -ENOMEM; goto err_unlock; } fdb->added_by_external_learn = 1; fdb_notify(br, fdb, RTM_NEWNEIGH); } else if (fdb->added_by_external_learn) { /* Refresh entry */ fdb->updated = fdb->used = jiffies; } else if (!fdb->added_by_user) { /* Take over SW learned entry */ fdb->added_by_external_learn = 1; fdb->updated = jiffies; fdb_notify(br, fdb, RTM_NEWNEIGH); } err_unlock: spin_unlock_bh(&br->hash_lock); return err; } int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, const unsigned char *addr, u16 vid) { struct hlist_head *head; struct net_bridge_fdb_entry *fdb; int err = 0; ASSERT_RTNL(); spin_lock_bh(&br->hash_lock); head = &br->hash[br_mac_hash(addr, vid)]; fdb = fdb_find(head, addr, vid); if (fdb && fdb->added_by_external_learn) fdb_delete(br, fdb); else err = -ENOENT; spin_unlock_bh(&br->hash_lock); return err; } #if defined(CONFIG_BCM_KF_WL) EXPORT_SYMBOL(fdb_check_expired_wl_hook); EXPORT_SYMBOL(fdb_check_expired_dhd_hook); #endif #if defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION) int br_fdb_get_vid(const unsigned char *addr) { struct net_bridge *br = NULL; struct net_bridge_fdb_entry *fdb; struct net_device *br_dev; int addr_hash = br_mac_hash(addr, 0); int vid = -1; rcu_read_lock(); for_each_netdev(&init_net, br_dev){ if (br_dev->priv_flags & IFF_EBRIDGE) { br = netdev_priv(br_dev); hlist_for_each_entry_rcu(fdb, &br->hash[addr_hash], hlist) { if (ether_addr_equal(fdb->addr.addr, addr)) { if (unlikely(!has_expired(br, fdb))) vid = (int)fdb->vlan_id; break; } } } } rcu_read_unlock(); return vid; } EXPORT_SYMBOL(br_fdb_get_vid); #endif //defined(CONFIG_BCM_KF_VLAN_AGGREGATION) && defined(CONFIG_BCM_VLAN_AGGREGATION)