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net/bridge/br_fdb.c
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/* * Forwarding database * Linux ethernet bridge * * Authors: * Lennert Buytenhek <buytenh@gnu.org> * |
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* 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 <linux/kernel.h> #include <linux/init.h> |
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#include <linux/rculist.h> |
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#include <linux/spinlock.h> #include <linux/times.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/jhash.h> |
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#include <linux/random.h> |
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#include <linux/slab.h> |
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#include <linux/atomic.h> |
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#include <asm/unaligned.h> |
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#include <linux/if_vlan.h> |
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#include "br_private.h" |
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static struct kmem_cache *br_fdb_cache __read_mostly; |
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static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, const unsigned char *addr, __u16 vid); |
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static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
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const unsigned char *addr, u16 vid); |
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static void fdb_notify(struct net_bridge *br, const struct net_bridge_fdb_entry *, int); |
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|
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static u32 fdb_salt __read_mostly; |
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int __init br_fdb_init(void) |
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{ br_fdb_cache = kmem_cache_create("bridge_fdb_cache", sizeof(struct net_bridge_fdb_entry), 0, |
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SLAB_HWCACHE_ALIGN, NULL); |
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if (!br_fdb_cache) return -ENOMEM; |
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get_random_bytes(&fdb_salt, sizeof(fdb_salt)); |
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return 0; |
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} |
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void br_fdb_fini(void) |
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{ kmem_cache_destroy(br_fdb_cache); } /* if topology_changing then use forward_delay (default 15 sec) * otherwise keep longer (default 5 minutes) */ |
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static inline unsigned long hold_time(const struct net_bridge *br) |
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{ return br->topology_change ? br->forward_delay : br->ageing_time; } |
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static inline int has_expired(const struct net_bridge *br, |
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const struct net_bridge_fdb_entry *fdb) { |
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return !fdb->is_static && |
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time_before_eq(fdb->updated + hold_time(br), jiffies); |
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} |
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static inline int br_mac_hash(const unsigned char *mac, __u16 vid) |
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{ |
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/* use 1 byte of OUI and 3 bytes of NIC */ |
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u32 key = get_unaligned((u32 *)(mac + 2)); |
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return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1); |
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} |
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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); } |
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static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f) |
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{ hlist_del_rcu(&f->hlist); |
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fdb_notify(br, f, RTM_DELNEIGH); |
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call_rcu(&f->rcu, fdb_rcu_free); |
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} |
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/* 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; |
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f->added_by_user = 0; |
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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; |
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f->added_by_user = 0; |
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return; } fdb_delete(br, f); } |
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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); } |
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void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) { struct net_bridge *br = p->br; |
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struct net_port_vlans *pv = nbp_get_vlan_info(p); bool no_vlan = !pv; |
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int i; |
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u16 vid; |
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|
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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); |
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if (f->dst == p && f->is_local && !f->added_by_user) { |
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/* delete old one */ |
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fdb_delete_local(br, p, f); |
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/* if this port has no vlan information * configured, we can safely be done at * this point. */ if (no_vlan) |
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goto insert; |
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} } } |
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|
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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); |
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done: |
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spin_unlock_bh(&br->hash_lock); } |
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void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) { struct net_bridge_fdb_entry *f; |
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struct net_port_vlans *pv; u16 vid = 0; |
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|
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spin_lock_bh(&br->hash_lock); |
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/* If old entry was unassociated with any port, then delete it. */ |
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f = __br_fdb_get(br, br->dev->dev_addr, 0); |
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if (f && f->is_local && !f->dst) |
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fdb_delete_local(br, NULL, f); |
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|
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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) |
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goto out; |
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|
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for_each_set_bit_from(vid, pv->vlan_bitmap, VLAN_N_VID) { |
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f = __br_fdb_get(br, br->dev->dev_addr, vid); if (f && f->is_local && !f->dst) |
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fdb_delete_local(br, NULL, f); |
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fdb_insert(br, NULL, newaddr, vid); } |
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out: spin_unlock_bh(&br->hash_lock); |
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} |
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void br_fdb_cleanup(unsigned long _data) { struct net_bridge *br = (struct net_bridge *)_data; unsigned long delay = hold_time(br); |
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unsigned long next_timer = jiffies + br->ageing_time; |
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int i; |
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spin_lock(&br->hash_lock); |
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for (i = 0; i < BR_HASH_SIZE; i++) { struct net_bridge_fdb_entry *f; |
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struct hlist_node *n; |
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|
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hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { |
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unsigned long this_timer; if (f->is_static) continue; |
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this_timer = f->updated + delay; |
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if (time_before_eq(this_timer, jiffies)) |
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fdb_delete(br, f); |
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else if (time_before(this_timer, next_timer)) |
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next_timer = this_timer; |
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} } |
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spin_unlock(&br->hash_lock); |
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|
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mod_timer(&br->gc_timer, round_jiffies_up(next_timer)); |
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} |
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/* 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; |
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struct hlist_node *n; hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { |
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if (!f->is_static) |
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fdb_delete(br, f); |
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} } spin_unlock_bh(&br->hash_lock); } |
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/* Flush all entries referring to a specific port. |
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* if do_all is set also flush static entries */ |
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void br_fdb_delete_by_port(struct net_bridge *br, const struct net_bridge_port *p, int do_all) |
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{ int i; spin_lock_bh(&br->hash_lock); for (i = 0; i < BR_HASH_SIZE; i++) { struct hlist_node *h, *g; |
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|
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hlist_for_each_safe(h, g, &br->hash[i]) { struct net_bridge_fdb_entry *f = hlist_entry(h, struct net_bridge_fdb_entry, hlist); |
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if (f->dst != p) |
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continue; |
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if (f->is_static && !do_all) continue; |
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|
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if (f->is_local) fdb_delete_local(br, p, f); else fdb_delete(br, f); |
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} } spin_unlock_bh(&br->hash_lock); } |
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/* No locking or refcounting, assumes caller has rcu_read_lock */ |
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struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, |
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const unsigned char *addr, __u16 vid) |
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{ |
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struct net_bridge_fdb_entry *fdb; |
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hlist_for_each_entry_rcu(fdb, |
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&br->hash[br_mac_hash(addr, vid)], hlist) { if (ether_addr_equal(fdb->addr.addr, addr) && fdb->vlan_id == vid) { |
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if (unlikely(has_expired(br, fdb))) break; return fdb; } } return NULL; } |
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#if IS_ENABLED(CONFIG_ATM_LANE) |
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/* 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) |
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{ struct net_bridge_fdb_entry *fdb; |
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struct net_bridge_port *port; |
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int ret; |
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rcu_read_lock(); |
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port = br_port_get_rcu(dev); if (!port) ret = 0; else { |
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fdb = __br_fdb_get(port->br, addr, 0); |
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ret = fdb && fdb->dst && fdb->dst->dev != dev && |
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fdb->dst->state == BR_STATE_FORWARDING; } |
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rcu_read_unlock(); |
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|
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return ret; |
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} |
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#endif /* CONFIG_ATM_LANE */ |
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/* |
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* Fill buffer with forwarding table records in |
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* 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; |
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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++) { |
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hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
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if (num >= maxnum) goto out; |
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if (has_expired(br, f)) |
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continue; |
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/* ignore pseudo entry for local MAC address */ if (!f->dst) continue; |
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if (skip) { --skip; continue; } /* convert from internal format to API */ memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN); |
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/* due to ABI compat need to split into hi/lo */ |
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fe->port_no = f->dst->port_no; |
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fe->port_hi = f->dst->port_no >> 8; |
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fe->is_local = f->is_local; if (!f->is_static) |
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fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); |
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++fe; ++num; } } out: rcu_read_unlock(); return num; } |
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static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, |
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const unsigned char *addr, __u16 vid) |
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{ |
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struct net_bridge_fdb_entry *fdb; |
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hlist_for_each_entry(fdb, head, hlist) { |
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if (ether_addr_equal(fdb->addr.addr, addr) && fdb->vlan_id == vid) |
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return fdb; } return NULL; } static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, |
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const unsigned char *addr, __u16 vid) |
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{ |
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struct net_bridge_fdb_entry *fdb; |
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hlist_for_each_entry_rcu(fdb, head, hlist) { |
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if (ether_addr_equal(fdb->addr.addr, addr) && fdb->vlan_id == vid) |
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return fdb; } return NULL; } static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, struct net_bridge_port *source, |
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const unsigned char *addr, __u16 vid) |
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{ struct net_bridge_fdb_entry *fdb; fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); if (fdb) { memcpy(fdb->addr.addr, addr, ETH_ALEN); |
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fdb->dst = source; |
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fdb->vlan_id = vid; |
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fdb->is_local = 0; fdb->is_static = 0; |
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fdb->added_by_user = 0; |
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fdb->updated = fdb->used = jiffies; |
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hlist_add_head_rcu(&fdb->hlist, head); |
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} return fdb; } static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
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const unsigned char *addr, u16 vid) |
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{ |
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415 |
struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4c Linux-2.6.12-rc2 |
416 417 418 419 |
struct net_bridge_fdb_entry *fdb; if (!is_valid_ether_addr(addr)) return -EINVAL; |
bc9a25d21 bridge: Add vlan ... |
420 |
fdb = fdb_find(head, addr, vid); |
1da177e4c Linux-2.6.12-rc2 |
421 |
if (fdb) { |
9d6f229fc [NET] BRIDGE: Fix... |
422 |
/* it is okay to have multiple ports with same |
1da177e4c Linux-2.6.12-rc2 |
423 424 |
* address, just use the first one. */ |
9d6f229fc [NET] BRIDGE: Fix... |
425 |
if (fdb->is_local) |
1da177e4c Linux-2.6.12-rc2 |
426 |
return 0; |
28a16c979 bridge: change co... |
427 |
br_warn(br, "adding interface %s with same address " |
1da177e4c Linux-2.6.12-rc2 |
428 429 |
"as a received packet ", |
9b46922e1 bridge: fix crash... |
430 |
source ? source->dev->name : br->dev->name); |
31e8a49c1 bridge: rearrange... |
431 |
fdb_delete(br, fdb); |
9d6f229fc [NET] BRIDGE: Fix... |
432 |
} |
1da177e4c Linux-2.6.12-rc2 |
433 |
|
bc9a25d21 bridge: Add vlan ... |
434 |
fdb = fdb_create(head, source, addr, vid); |
03e9b64b8 bridge: change ar... |
435 |
if (!fdb) |
1da177e4c Linux-2.6.12-rc2 |
436 |
return -ENOMEM; |
03e9b64b8 bridge: change ar... |
437 |
fdb->is_local = fdb->is_static = 1; |
31e8a49c1 bridge: rearrange... |
438 |
fdb_notify(br, fdb, RTM_NEWNEIGH); |
1da177e4c Linux-2.6.12-rc2 |
439 440 |
return 0; } |
03e9b64b8 bridge: change ar... |
441 |
/* Add entry for local address of interface */ |
1da177e4c Linux-2.6.12-rc2 |
442 |
int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d21 bridge: Add vlan ... |
443 |
const unsigned char *addr, u16 vid) |
1da177e4c Linux-2.6.12-rc2 |
444 445 446 447 |
{ int ret; spin_lock_bh(&br->hash_lock); |
bc9a25d21 bridge: Add vlan ... |
448 |
ret = fdb_insert(br, source, addr, vid); |
1da177e4c Linux-2.6.12-rc2 |
449 450 451 452 453 |
spin_unlock_bh(&br->hash_lock); return ret; } void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, |
a5642ab47 bridge: Fix the w... |
454 |
const unsigned char *addr, u16 vid, bool added_by_user) |
1da177e4c Linux-2.6.12-rc2 |
455 |
{ |
2ba071ecb bridge: Add vlan ... |
456 |
struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4c Linux-2.6.12-rc2 |
457 |
struct net_bridge_fdb_entry *fdb; |
c65c7a306 bridge: notify us... |
458 |
bool fdb_modified = false; |
1da177e4c Linux-2.6.12-rc2 |
459 460 461 462 |
/* some users want to always flood. */ if (hold_time(br) == 0) return; |
df1c0b846 [BRIDGE]: Packets... |
463 464 465 466 |
/* ignore packets unless we are using this port */ if (!(source->state == BR_STATE_LEARNING || source->state == BR_STATE_FORWARDING)) return; |
2ba071ecb bridge: Add vlan ... |
467 |
fdb = fdb_find_rcu(head, addr, vid); |
1da177e4c Linux-2.6.12-rc2 |
468 469 470 |
if (likely(fdb)) { /* attempt to update an entry for a local interface */ if (unlikely(fdb->is_local)) { |
9d6f229fc [NET] BRIDGE: Fix... |
471 |
if (net_ratelimit()) |
28a16c979 bridge: change co... |
472 473 474 475 |
br_warn(br, "received packet on %s with " "own address as source address ", source->dev->name); |
1da177e4c Linux-2.6.12-rc2 |
476 477 |
} else { /* fastpath: update of existing entry */ |
c65c7a306 bridge: notify us... |
478 479 480 481 |
if (unlikely(source != fdb->dst)) { fdb->dst = source; fdb_modified = true; } |
7cd8861ab bridge: track las... |
482 |
fdb->updated = jiffies; |
a5642ab47 bridge: Fix the w... |
483 484 |
if (unlikely(added_by_user)) fdb->added_by_user = 1; |
c65c7a306 bridge: notify us... |
485 486 |
if (unlikely(fdb_modified)) fdb_notify(br, fdb, RTM_NEWNEIGH); |
1da177e4c Linux-2.6.12-rc2 |
487 488 |
} } else { |
f8ae737de [BRIDGE]: forward... |
489 |
spin_lock(&br->hash_lock); |
2ba071ecb bridge: Add vlan ... |
490 491 |
if (likely(!fdb_find(head, addr, vid))) { fdb = fdb_create(head, source, addr, vid); |
a5642ab47 bridge: Fix the w... |
492 493 494 |
if (fdb) { if (unlikely(added_by_user)) fdb->added_by_user = 1; |
31e8a49c1 bridge: rearrange... |
495 |
fdb_notify(br, fdb, RTM_NEWNEIGH); |
a5642ab47 bridge: Fix the w... |
496 |
} |
f58ee4e1a bridge: refactor ... |
497 |
} |
1da177e4c Linux-2.6.12-rc2 |
498 499 500 |
/* else we lose race and someone else inserts * it first, don't bother updating */ |
f8ae737de [BRIDGE]: forward... |
501 |
spin_unlock(&br->hash_lock); |
1da177e4c Linux-2.6.12-rc2 |
502 |
} |
1da177e4c Linux-2.6.12-rc2 |
503 |
} |
b078f0df6 bridge: add netli... |
504 505 506 507 508 509 510 511 512 513 514 515 |
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; } |
31e8a49c1 bridge: rearrange... |
516 |
static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, |
b078f0df6 bridge: add netli... |
517 |
const struct net_bridge_fdb_entry *fdb, |
15e473046 netlink: Rename p... |
518 |
u32 portid, u32 seq, int type, unsigned int flags) |
b078f0df6 bridge: add netli... |
519 520 521 522 523 |
{ unsigned long now = jiffies; struct nda_cacheinfo ci; struct nlmsghdr *nlh; struct ndmsg *ndm; |
15e473046 netlink: Rename p... |
524 |
nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); |
b078f0df6 bridge: add netli... |
525 526 |
if (nlh == NULL) return -EMSGSIZE; |
b078f0df6 bridge: add netli... |
527 528 529 530 531 532 |
ndm = nlmsg_data(nlh); ndm->ndm_family = AF_BRIDGE; ndm->ndm_pad1 = 0; ndm->ndm_pad2 = 0; ndm->ndm_flags = 0; ndm->ndm_type = 0; |
435988133 bridge: add local... |
533 |
ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; |
b078f0df6 bridge: add netli... |
534 |
ndm->ndm_state = fdb_to_nud(fdb); |
2eb812e65 bridge: Stop usin... |
535 536 |
if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr)) goto nla_put_failure; |
b078f0df6 bridge: add netli... |
537 538 539 540 |
ci.ndm_used = jiffies_to_clock_t(now - fdb->used); ci.ndm_confirmed = 0; ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); ci.ndm_refcnt = 0; |
2eb812e65 bridge: Stop usin... |
541 542 |
if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) goto nla_put_failure; |
1690be63a bridge: Add vlan ... |
543 544 545 |
if (nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id)) goto nla_put_failure; |
b078f0df6 bridge: add netli... |
546 547 548 549 550 551 552 553 554 555 556 |
return nlmsg_end(skb, nlh); 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 */ |
1690be63a bridge: Add vlan ... |
557 |
+ nla_total_size(sizeof(u16)) /* NDA_VLAN */ |
b078f0df6 bridge: add netli... |
558 559 |
+ nla_total_size(sizeof(struct nda_cacheinfo)); } |
31e8a49c1 bridge: rearrange... |
560 561 |
static void fdb_notify(struct net_bridge *br, const struct net_bridge_fdb_entry *fdb, int type) |
b078f0df6 bridge: add netli... |
562 |
{ |
31e8a49c1 bridge: rearrange... |
563 |
struct net *net = dev_net(br->dev); |
b078f0df6 bridge: add netli... |
564 565 566 567 568 569 |
struct sk_buff *skb; int err = -ENOBUFS; skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); if (skb == NULL) goto errout; |
31e8a49c1 bridge: rearrange... |
570 |
err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); |
b078f0df6 bridge: add netli... |
571 572 573 574 575 576 577 578 579 |
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: |
87e823b3d bridge: remove un... |
580 |
rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); |
b078f0df6 bridge: add netli... |
581 582 583 |
} /* Dump information about entries, in response to GETNEIGH */ |
77162022a net: add generic ... |
584 585 586 587 |
int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, struct net_device *dev, int idx) |
b078f0df6 bridge: add netli... |
588 |
{ |
77162022a net: add generic ... |
589 590 |
struct net_bridge *br = netdev_priv(dev); int i; |
b078f0df6 bridge: add netli... |
591 |
|
77162022a net: add generic ... |
592 593 |
if (!(dev->priv_flags & IFF_EBRIDGE)) goto out; |
b078f0df6 bridge: add netli... |
594 |
|
77162022a net: add generic ... |
595 |
for (i = 0; i < BR_HASH_SIZE; i++) { |
77162022a net: add generic ... |
596 |
struct net_bridge_fdb_entry *f; |
b078f0df6 bridge: add netli... |
597 |
|
b67bfe0d4 hlist: drop the n... |
598 |
hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
77162022a net: add generic ... |
599 600 601 602 |
if (idx < cb->args[0]) goto skip; if (fdb_fill_info(skb, br, f, |
15e473046 netlink: Rename p... |
603 |
NETLINK_CB(cb->skb).portid, |
77162022a net: add generic ... |
604 605 606 607 |
cb->nlh->nlmsg_seq, RTM_NEWNEIGH, NLM_F_MULTI) < 0) break; |
b078f0df6 bridge: add netli... |
608 |
skip: |
77162022a net: add generic ... |
609 |
++idx; |
b078f0df6 bridge: add netli... |
610 611 |
} } |
b078f0df6 bridge: add netli... |
612 |
|
77162022a net: add generic ... |
613 614 |
out: return idx; |
b078f0df6 bridge: add netli... |
615 |
} |
36fd2b63e bridge: allow cre... |
616 |
|
292d13989 bridge: add NTF_U... |
617 |
/* Update (create or replace) forwarding database entry */ |
36fd2b63e bridge: allow cre... |
618 |
static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, |
2ba071ecb bridge: Add vlan ... |
619 |
__u16 state, __u16 flags, __u16 vid) |
36fd2b63e bridge: allow cre... |
620 621 |
{ struct net_bridge *br = source->br; |
2ba071ecb bridge: Add vlan ... |
622 |
struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
36fd2b63e bridge: allow cre... |
623 |
struct net_bridge_fdb_entry *fdb; |
b0a397fb3 bridge: Add fdb d... |
624 |
bool modified = false; |
36fd2b63e bridge: allow cre... |
625 |
|
2ba071ecb bridge: Add vlan ... |
626 |
fdb = fdb_find(head, addr, vid); |
64af1bac9 bridge: allow upd... |
627 628 629 |
if (fdb == NULL) { if (!(flags & NLM_F_CREATE)) return -ENOENT; |
36fd2b63e bridge: allow cre... |
630 |
|
2ba071ecb bridge: Add vlan ... |
631 |
fdb = fdb_create(head, source, addr, vid); |
64af1bac9 bridge: allow upd... |
632 633 |
if (!fdb) return -ENOMEM; |
b0a397fb3 bridge: Add fdb d... |
634 635 |
modified = true; |
64af1bac9 bridge: allow upd... |
636 637 638 |
} else { if (flags & NLM_F_EXCL) return -EEXIST; |
b0a397fb3 bridge: Add fdb d... |
639 640 641 642 643 |
if (fdb->dst != source) { fdb->dst = source; modified = true; } |
292d13989 bridge: add NTF_U... |
644 645 646 647 648 649 650 651 652 653 |
} if (fdb_to_nud(fdb) != state) { if (state & NUD_PERMANENT) fdb->is_local = fdb->is_static = 1; else if (state & NUD_NOARP) { fdb->is_local = 0; fdb->is_static = 1; } else fdb->is_local = fdb->is_static = 0; |
64af1bac9 bridge: allow upd... |
654 |
|
b0a397fb3 bridge: Add fdb d... |
655 656 |
modified = true; } |
a5642ab47 bridge: Fix the w... |
657 |
fdb->added_by_user = 1; |
b0a397fb3 bridge: Add fdb d... |
658 659 660 661 |
fdb->used = jiffies; if (modified) { fdb->updated = jiffies; |
31e8a49c1 bridge: rearrange... |
662 |
fdb_notify(br, fdb, RTM_NEWNEIGH); |
64af1bac9 bridge: allow upd... |
663 |
} |
36fd2b63e bridge: allow cre... |
664 |
|
36fd2b63e bridge: allow cre... |
665 666 |
return 0; } |
1690be63a bridge: Add vlan ... |
667 668 669 670 671 672 673 |
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) { rcu_read_lock(); |
a5642ab47 bridge: Fix the w... |
674 |
br_fdb_update(p->br, p, addr, vid, true); |
1690be63a bridge: Add vlan ... |
675 676 677 678 679 680 681 682 683 684 |
rcu_read_unlock(); } 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; } |
36fd2b63e bridge: allow cre... |
685 |
/* Add new permanent fdb entry with RTM_NEWNEIGH */ |
edc7d5732 netlink: add attr... |
686 687 |
int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, |
6b6e27255 netdev: make addr... |
688 |
const unsigned char *addr, u16 nlh_flags) |
36fd2b63e bridge: allow cre... |
689 |
{ |
36fd2b63e bridge: allow cre... |
690 |
struct net_bridge_port *p; |
77162022a net: add generic ... |
691 |
int err = 0; |
1690be63a bridge: Add vlan ... |
692 693 |
struct net_port_vlans *pv; unsigned short vid = VLAN_N_VID; |
36fd2b63e bridge: allow cre... |
694 |
|
292d13989 bridge: add NTF_U... |
695 696 697 698 699 |
if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { pr_info("bridge: RTM_NEWNEIGH with invalid state %#x ", ndm->ndm_state); return -EINVAL; } |
1690be63a bridge: Add vlan ... |
700 701 702 703 704 705 706 707 |
if (tb[NDA_VLAN]) { if (nla_len(tb[NDA_VLAN]) != sizeof(unsigned short)) { pr_info("bridge: RTM_NEWNEIGH with invalid vlan "); return -EINVAL; } vid = nla_get_u16(tb[NDA_VLAN]); |
8adff41c3 bridge: Don't use... |
708 |
if (!vid || vid >= VLAN_VID_MASK) { |
1690be63a bridge: Add vlan ... |
709 710 711 712 713 714 |
pr_info("bridge: RTM_NEWNEIGH with invalid vlan id %d ", vid); return -EINVAL; } } |
537f7f849 bridge: check for... |
715 716 717 718 719 |
if (is_zero_ether_addr(addr)) { pr_info("bridge: RTM_NEWNEIGH with invalid ether address "); return -EINVAL; } |
36fd2b63e bridge: allow cre... |
720 721 722 723 724 725 726 |
p = br_port_get_rtnl(dev); if (p == NULL) { pr_info("bridge: RTM_NEWNEIGH %s not a bridge port ", dev->name); return -EINVAL; } |
1690be63a bridge: Add vlan ... |
727 728 729 730 731 732 733 734 735 736 737 |
pv = nbp_get_vlan_info(p); if (vid != VLAN_N_VID) { if (!pv || !test_bit(vid, pv->vlan_bitmap)) { pr_info("bridge: RTM_NEWNEIGH with unconfigured " "vlan %d on port %s ", vid, dev->name); return -EINVAL; } /* VID was specified, so use it. */ err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); |
292d13989 bridge: add NTF_U... |
738 |
} else { |
ef40b7ef1 bridge: Use the c... |
739 |
if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID)) { |
1690be63a bridge: Add vlan ... |
740 741 742 743 744 745 746 747 |
err = __br_fdb_add(ndm, p, addr, nlh_flags, 0); 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. */ |
ef40b7ef1 bridge: Use the c... |
748 |
for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { |
1690be63a bridge: Add vlan ... |
749 750 751 |
err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); if (err) goto out; |
1690be63a bridge: Add vlan ... |
752 |
} |
292d13989 bridge: add NTF_U... |
753 |
} |
36fd2b63e bridge: allow cre... |
754 |
|
1690be63a bridge: Add vlan ... |
755 |
out: |
36fd2b63e bridge: allow cre... |
756 757 |
return err; } |
424bb9c97 bridge: Properly ... |
758 |
static int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vlan) |
36fd2b63e bridge: allow cre... |
759 |
{ |
1690be63a bridge: Add vlan ... |
760 |
struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)]; |
36fd2b63e bridge: allow cre... |
761 |
struct net_bridge_fdb_entry *fdb; |
1690be63a bridge: Add vlan ... |
762 |
fdb = fdb_find(head, addr, vlan); |
36fd2b63e bridge: allow cre... |
763 764 |
if (!fdb) return -ENOENT; |
1690be63a bridge: Add vlan ... |
765 |
fdb_delete(br, fdb); |
36fd2b63e bridge: allow cre... |
766 767 |
return 0; } |
1690be63a bridge: Add vlan ... |
768 769 770 771 772 773 774 775 776 777 778 |
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; } |
36fd2b63e bridge: allow cre... |
779 |
/* Remove neighbor entry with RTM_DELNEIGH */ |
1690be63a bridge: Add vlan ... |
780 781 |
int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, |
6b6e27255 netdev: make addr... |
782 |
const unsigned char *addr) |
36fd2b63e bridge: allow cre... |
783 |
{ |
36fd2b63e bridge: allow cre... |
784 |
struct net_bridge_port *p; |
36fd2b63e bridge: allow cre... |
785 |
int err; |
1690be63a bridge: Add vlan ... |
786 787 |
struct net_port_vlans *pv; unsigned short vid = VLAN_N_VID; |
36fd2b63e bridge: allow cre... |
788 |
|
1690be63a bridge: Add vlan ... |
789 790 791 792 793 794 795 796 |
if (tb[NDA_VLAN]) { if (nla_len(tb[NDA_VLAN]) != sizeof(unsigned short)) { pr_info("bridge: RTM_NEWNEIGH with invalid vlan "); return -EINVAL; } vid = nla_get_u16(tb[NDA_VLAN]); |
8adff41c3 bridge: Don't use... |
797 |
if (!vid || vid >= VLAN_VID_MASK) { |
1690be63a bridge: Add vlan ... |
798 799 800 801 802 803 |
pr_info("bridge: RTM_NEWNEIGH with invalid vlan id %d ", vid); return -EINVAL; } } |
36fd2b63e bridge: allow cre... |
804 805 806 807 808 809 810 |
p = br_port_get_rtnl(dev); if (p == NULL) { pr_info("bridge: RTM_DELNEIGH %s not a bridge port ", dev->name); return -EINVAL; } |
1690be63a bridge: Add vlan ... |
811 812 813 814 815 816 817 818 |
pv = nbp_get_vlan_info(p); if (vid != VLAN_N_VID) { if (!pv || !test_bit(vid, pv->vlan_bitmap)) { pr_info("bridge: RTM_DELNEIGH with unconfigured " "vlan %d on port %s ", vid, dev->name); return -EINVAL; } |
36fd2b63e bridge: allow cre... |
819 |
|
1690be63a bridge: Add vlan ... |
820 821 |
err = __br_fdb_delete(p, addr, vid); } else { |
ef40b7ef1 bridge: Use the c... |
822 |
if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID)) { |
1690be63a bridge: Add vlan ... |
823 824 825 826 827 828 829 830 831 |
err = __br_fdb_delete(p, addr, 0); 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. */ err = -ENOENT; |
ef40b7ef1 bridge: Use the c... |
832 |
for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { |
1690be63a bridge: Add vlan ... |
833 |
err &= __br_fdb_delete(p, addr, vid); |
1690be63a bridge: Add vlan ... |
834 835 836 |
} } out: |
36fd2b63e bridge: allow cre... |
837 838 |
return err; } |