^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Forwarding database
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Linux ethernet bridge
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Lennert Buytenhek <buytenh@gnu.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/rculist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/times.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/jhash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/random.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/if_vlan.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <net/switchdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <trace/events/bridge.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "br_private.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static const struct rhashtable_params br_fdb_rht_params = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) .head_offset = offsetof(struct net_bridge_fdb_entry, rhnode),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .key_offset = offsetof(struct net_bridge_fdb_entry, key),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) .key_len = sizeof(struct net_bridge_fdb_key),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) .automatic_shrinking = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static struct kmem_cache *br_fdb_cache __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) const unsigned char *addr, u16 vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static void fdb_notify(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) const struct net_bridge_fdb_entry *, int, bool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int __init br_fdb_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) br_fdb_cache = kmem_cache_create("bridge_fdb_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) sizeof(struct net_bridge_fdb_entry),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) SLAB_HWCACHE_ALIGN, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (!br_fdb_cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) void br_fdb_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) kmem_cache_destroy(br_fdb_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) int br_fdb_hash_init(struct net_bridge *br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return rhashtable_init(&br->fdb_hash_tbl, &br_fdb_rht_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) void br_fdb_hash_fini(struct net_bridge *br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) rhashtable_destroy(&br->fdb_hash_tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* if topology_changing then use forward_delay (default 15 sec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * otherwise keep longer (default 5 minutes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static inline unsigned long hold_time(const struct net_bridge *br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return br->topology_change ? br->forward_delay : br->ageing_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static inline int has_expired(const struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) const struct net_bridge_fdb_entry *fdb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return !test_bit(BR_FDB_STATIC, &fdb->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) !test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) time_before_eq(fdb->updated + hold_time(br), jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static void fdb_rcu_free(struct rcu_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct net_bridge_fdb_entry *ent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) = container_of(head, struct net_bridge_fdb_entry, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) kmem_cache_free(br_fdb_cache, ent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static struct net_bridge_fdb_entry *fdb_find_rcu(struct rhashtable *tbl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) const unsigned char *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) __u16 vid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct net_bridge_fdb_key key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) WARN_ON_ONCE(!rcu_read_lock_held());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) key.vlan_id = vid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) memcpy(key.addr.addr, addr, sizeof(key.addr.addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return rhashtable_lookup(tbl, &key, br_fdb_rht_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /* requires bridge hash_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static struct net_bridge_fdb_entry *br_fdb_find(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) const unsigned char *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) __u16 vid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct net_bridge_fdb_entry *fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) lockdep_assert_held_once(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) fdb = fdb_find_rcu(&br->fdb_hash_tbl, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct net_device *br_fdb_find_port(const struct net_device *br_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) const unsigned char *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) __u16 vid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct net_bridge_fdb_entry *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) struct net_device *dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct net_bridge *br;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (!netif_is_bridge_master(br_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) br = netdev_priv(br_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) f = br_fdb_find_rcu(br, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (f && f->dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) dev = f->dst->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) EXPORT_SYMBOL_GPL(br_fdb_find_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) const unsigned char *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) __u16 vid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return fdb_find_rcu(&br->fdb_hash_tbl, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /* When a static FDB entry is added, the mac address from the entry is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * added to the bridge private HW address list and all required ports
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * are then updated with the new information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * Called under RTNL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) list_for_each_entry(p, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (!br_promisc_port(p)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) err = dev_uc_add(p->dev, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) goto undo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) undo:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) list_for_each_entry_continue_reverse(p, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (!br_promisc_port(p))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) dev_uc_del(p->dev, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) /* When a static FDB entry is deleted, the HW address from that entry is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * also removed from the bridge private HW address list and updates all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * the ports with needed information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * Called under RTNL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) list_for_each_entry(p, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (!br_promisc_port(p))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) dev_uc_del(p->dev, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) bool swdev_notify)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) trace_fdb_delete(br, f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (test_bit(BR_FDB_STATIC, &f->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) fdb_del_hw_addr(br, f->key.addr.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) hlist_del_init_rcu(&f->fdb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) rhashtable_remove_fast(&br->fdb_hash_tbl, &f->rhnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) br_fdb_rht_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) fdb_notify(br, f, RTM_DELNEIGH, swdev_notify);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) call_rcu(&f->rcu, fdb_rcu_free);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /* Delete a local entry if no other port had the same address. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static void fdb_delete_local(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) const struct net_bridge_port *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct net_bridge_fdb_entry *f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) const unsigned char *addr = f->key.addr.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) struct net_bridge_vlan_group *vg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) const struct net_bridge_vlan *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct net_bridge_port *op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) u16 vid = f->key.vlan_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /* Maybe another port has same hw addr? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) list_for_each_entry(op, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) vg = nbp_vlan_group(op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (op != p && ether_addr_equal(op->dev->dev_addr, addr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) (!vid || br_vlan_find(vg, vid))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) f->dst = op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) clear_bit(BR_FDB_ADDED_BY_USER, &f->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) vg = br_vlan_group(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) v = br_vlan_find(vg, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) /* Maybe bridge device has same hw addr? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) if (p && ether_addr_equal(br->dev->dev_addr, addr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) (!vid || (v && br_vlan_should_use(v)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) f->dst = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) clear_bit(BR_FDB_ADDED_BY_USER, &f->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) fdb_delete(br, f, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) void br_fdb_find_delete_local(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) const struct net_bridge_port *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) const unsigned char *addr, u16 vid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) struct net_bridge_fdb_entry *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) f = br_fdb_find(br, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (f && test_bit(BR_FDB_LOCAL, &f->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) !test_bit(BR_FDB_ADDED_BY_USER, &f->flags) && f->dst == p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) fdb_delete_local(br, p, f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) struct net_bridge_vlan_group *vg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) struct net_bridge_fdb_entry *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) struct net_bridge *br = p->br;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) struct net_bridge_vlan *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) vg = nbp_vlan_group(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) hlist_for_each_entry(f, &br->fdb_list, fdb_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (f->dst == p && test_bit(BR_FDB_LOCAL, &f->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) !test_bit(BR_FDB_ADDED_BY_USER, &f->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /* delete old one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) fdb_delete_local(br, p, f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) /* if this port has no vlan information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) * configured, we can safely be done at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) * this point.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (!vg || !vg->num_vlans)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) goto insert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) insert:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) /* insert new address, may fail if invalid address or dup. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) fdb_insert(br, p, newaddr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (!vg || !vg->num_vlans)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) /* Now add entries for every VLAN configured on the port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) * This function runs under RTNL so the bitmap will not change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) * from under us.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) list_for_each_entry(v, &vg->vlan_list, vlist)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) fdb_insert(br, p, newaddr, v->vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) struct net_bridge_vlan_group *vg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) struct net_bridge_fdb_entry *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct net_bridge_vlan *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) /* If old entry was unassociated with any port, then delete it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) f = br_fdb_find(br, br->dev->dev_addr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (f && test_bit(BR_FDB_LOCAL, &f->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) !f->dst && !test_bit(BR_FDB_ADDED_BY_USER, &f->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) fdb_delete_local(br, NULL, f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) fdb_insert(br, NULL, newaddr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) vg = br_vlan_group(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (!vg || !vg->num_vlans)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) /* Now remove and add entries for every VLAN configured on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * bridge. This function runs under RTNL so the bitmap will not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) * change from under us.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) list_for_each_entry(v, &vg->vlan_list, vlist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (!br_vlan_should_use(v))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) f = br_fdb_find(br, br->dev->dev_addr, v->vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (f && test_bit(BR_FDB_LOCAL, &f->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) !f->dst && !test_bit(BR_FDB_ADDED_BY_USER, &f->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) fdb_delete_local(br, NULL, f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) fdb_insert(br, NULL, newaddr, v->vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) void br_fdb_cleanup(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) struct net_bridge *br = container_of(work, struct net_bridge,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) gc_work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) struct net_bridge_fdb_entry *f = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) unsigned long delay = hold_time(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) unsigned long work_delay = delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) unsigned long now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) /* this part is tricky, in order to avoid blocking learning and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) * consequently forwarding, we rely on rcu to delete objects with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) * delayed freeing allowing us to continue traversing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) hlist_for_each_entry_rcu(f, &br->fdb_list, fdb_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) unsigned long this_timer = f->updated + delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (test_bit(BR_FDB_STATIC, &f->flags) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &f->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (test_bit(BR_FDB_NOTIFY, &f->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (time_after(this_timer, now))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) work_delay = min(work_delay,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) this_timer - now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) else if (!test_and_set_bit(BR_FDB_NOTIFY_INACTIVE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) &f->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) fdb_notify(br, f, RTM_NEWNEIGH, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) if (time_after(this_timer, now)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) work_delay = min(work_delay, this_timer - now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (!hlist_unhashed(&f->fdb_node))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) fdb_delete(br, f, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) /* Cleanup minimum 10 milliseconds apart */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) work_delay = max_t(unsigned long, work_delay, msecs_to_jiffies(10));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) mod_delayed_work(system_long_wq, &br->gc_work, work_delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) /* Completely flush all dynamic entries in forwarding database.*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) void br_fdb_flush(struct net_bridge *br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) struct net_bridge_fdb_entry *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct hlist_node *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) hlist_for_each_entry_safe(f, tmp, &br->fdb_list, fdb_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) if (!test_bit(BR_FDB_STATIC, &f->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) fdb_delete(br, f, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) /* Flush all entries referring to a specific port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) * if do_all is set also flush static entries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) * if vid is set delete all entries that match the vlan_id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) void br_fdb_delete_by_port(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) const struct net_bridge_port *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) u16 vid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) int do_all)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) struct net_bridge_fdb_entry *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) struct hlist_node *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) hlist_for_each_entry_safe(f, tmp, &br->fdb_list, fdb_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (f->dst != p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) if (!do_all)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (test_bit(BR_FDB_STATIC, &f->flags) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) (test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &f->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) !test_bit(BR_FDB_OFFLOADED, &f->flags)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) (vid && f->key.vlan_id != vid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (test_bit(BR_FDB_LOCAL, &f->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) fdb_delete_local(br, p, f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) fdb_delete(br, f, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) #if IS_ENABLED(CONFIG_ATM_LANE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /* Interface used by ATM LANE hook to test
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * if an addr is on some other bridge port */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) int br_fdb_test_addr(struct net_device *dev, unsigned char *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) struct net_bridge_fdb_entry *fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) struct net_bridge_port *port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) port = br_port_get_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (!port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) fdb = br_fdb_find_rcu(port->br, addr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) ret = fdb && fdb->dst && fdb->dst->dev != dev &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) fdb->dst->state == BR_STATE_FORWARDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) #endif /* CONFIG_ATM_LANE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) * Fill buffer with forwarding table records in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) * the API format.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) int br_fdb_fillbuf(struct net_bridge *br, void *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) unsigned long maxnum, unsigned long skip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) struct net_bridge_fdb_entry *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) struct __fdb_entry *fe = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) int num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) memset(buf, 0, maxnum*sizeof(struct __fdb_entry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) hlist_for_each_entry_rcu(f, &br->fdb_list, fdb_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) if (num >= maxnum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) if (has_expired(br, f))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) /* ignore pseudo entry for local MAC address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) if (!f->dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if (skip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) --skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) /* convert from internal format to API */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) memcpy(fe->mac_addr, f->key.addr.addr, ETH_ALEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) /* due to ABI compat need to split into hi/lo */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) fe->port_no = f->dst->port_no;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) fe->port_hi = f->dst->port_no >> 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) fe->is_local = test_bit(BR_FDB_LOCAL, &f->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if (!test_bit(BR_FDB_STATIC, &f->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) ++fe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) ++num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) return num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) static struct net_bridge_fdb_entry *fdb_create(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) struct net_bridge_port *source,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) const unsigned char *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) __u16 vid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) unsigned long flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) struct net_bridge_fdb_entry *fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (fdb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) memcpy(fdb->key.addr.addr, addr, ETH_ALEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) fdb->dst = source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) fdb->key.vlan_id = vid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) fdb->flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) fdb->updated = fdb->used = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (rhashtable_lookup_insert_fast(&br->fdb_hash_tbl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) &fdb->rhnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) br_fdb_rht_params)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) kmem_cache_free(br_fdb_cache, fdb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) fdb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) hlist_add_head_rcu(&fdb->fdb_node, &br->fdb_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) return fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) const unsigned char *addr, u16 vid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) struct net_bridge_fdb_entry *fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) if (!is_valid_ether_addr(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) fdb = br_fdb_find(br, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (fdb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) /* it is okay to have multiple ports with same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) * address, just use the first one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) if (test_bit(BR_FDB_LOCAL, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) br_warn(br, "adding interface %s with same address as a received packet (addr:%pM, vlan:%u)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) source ? source->dev->name : br->dev->name, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) fdb_delete(br, fdb, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) fdb = fdb_create(br, source, addr, vid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) BIT(BR_FDB_LOCAL) | BIT(BR_FDB_STATIC));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) if (!fdb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) fdb_add_hw_addr(br, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) fdb_notify(br, fdb, RTM_NEWNEIGH, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) /* Add entry for local address of interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) const unsigned char *addr, u16 vid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) ret = fdb_insert(br, source, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) /* returns true if the fdb was modified */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) static bool __fdb_mark_active(struct net_bridge_fdb_entry *fdb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) return !!(test_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) test_and_clear_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) const unsigned char *addr, u16 vid, unsigned long flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) struct net_bridge_fdb_entry *fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) /* some users want to always flood. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) if (hold_time(br) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) fdb = fdb_find_rcu(&br->fdb_hash_tbl, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) if (likely(fdb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) /* attempt to update an entry for a local interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) if (unlikely(test_bit(BR_FDB_LOCAL, &fdb->flags))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) if (net_ratelimit())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) br_warn(br, "received packet on %s with own address as source address (addr:%pM, vlan:%u)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) source->dev->name, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) unsigned long now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) bool fdb_modified = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (now != fdb->updated) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) fdb->updated = now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) fdb_modified = __fdb_mark_active(fdb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) /* fastpath: update of existing entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) if (unlikely(source != fdb->dst &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) !test_bit(BR_FDB_STICKY, &fdb->flags))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) fdb->dst = source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) fdb_modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) /* Take over HW learned entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) if (unlikely(test_bit(BR_FDB_ADDED_BY_EXT_LEARN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) &fdb->flags)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) clear_bit(BR_FDB_ADDED_BY_EXT_LEARN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) if (unlikely(test_bit(BR_FDB_ADDED_BY_USER, &flags)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) set_bit(BR_FDB_ADDED_BY_USER, &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) if (unlikely(fdb_modified)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) trace_br_fdb_update(br, source, addr, vid, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) fdb_notify(br, fdb, RTM_NEWNEIGH, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) spin_lock(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) fdb = fdb_create(br, source, addr, vid, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) if (fdb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) trace_br_fdb_update(br, source, addr, vid, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) fdb_notify(br, fdb, RTM_NEWNEIGH, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) /* else we lose race and someone else inserts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) * it first, don't bother updating
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) spin_unlock(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) static int fdb_to_nud(const struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) const struct net_bridge_fdb_entry *fdb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (test_bit(BR_FDB_LOCAL, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) return NUD_PERMANENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) else if (test_bit(BR_FDB_STATIC, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) return NUD_NOARP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) else if (has_expired(br, fdb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) return NUD_STALE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) return NUD_REACHABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) const struct net_bridge_fdb_entry *fdb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) u32 portid, u32 seq, int type, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) unsigned long now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) struct nda_cacheinfo ci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) struct nlmsghdr *nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) struct ndmsg *ndm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) if (nlh == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) ndm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) ndm->ndm_family = AF_BRIDGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) ndm->ndm_pad1 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) ndm->ndm_pad2 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) ndm->ndm_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) ndm->ndm_type = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) ndm->ndm_state = fdb_to_nud(br, fdb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) if (test_bit(BR_FDB_OFFLOADED, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) ndm->ndm_flags |= NTF_OFFLOADED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) if (test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) ndm->ndm_flags |= NTF_EXT_LEARNED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (test_bit(BR_FDB_STICKY, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) ndm->ndm_flags |= NTF_STICKY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->key.addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) ci.ndm_confirmed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) ci.ndm_refcnt = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) if (fdb->key.vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) &fdb->key.vlan_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) if (test_bit(BR_FDB_NOTIFY, &fdb->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) struct nlattr *nest = nla_nest_start(skb, NDA_FDB_EXT_ATTRS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) u8 notify_bits = FDB_NOTIFY_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) if (!nest)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) if (test_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) notify_bits |= FDB_NOTIFY_INACTIVE_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) if (nla_put_u8(skb, NFEA_ACTIVITY_NOTIFY, notify_bits)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) nla_nest_cancel(skb, nest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) nla_nest_end(skb, nest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) nlmsg_end(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) nlmsg_cancel(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) static inline size_t fdb_nlmsg_size(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) return NLMSG_ALIGN(sizeof(struct ndmsg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) + nla_total_size(sizeof(u32)) /* NDA_MASTER */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) + nla_total_size(sizeof(u16)) /* NDA_VLAN */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) + nla_total_size(sizeof(struct nda_cacheinfo))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) + nla_total_size(0) /* NDA_FDB_EXT_ATTRS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) + nla_total_size(sizeof(u8)); /* NFEA_ACTIVITY_NOTIFY */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) static void fdb_notify(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) const struct net_bridge_fdb_entry *fdb, int type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) bool swdev_notify)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) struct net *net = dev_net(br->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) int err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) if (swdev_notify)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) br_switchdev_fdb_notify(fdb, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) if (skb == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) WARN_ON(err == -EMSGSIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) errout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) /* Dump information about entries, in response to GETNEIGH */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) int br_fdb_dump(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) struct net_device *filter_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) int *idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) struct net_bridge *br = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) struct net_bridge_fdb_entry *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) if (!(dev->priv_flags & IFF_EBRIDGE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) if (!filter_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) hlist_for_each_entry_rcu(f, &br->fdb_list, fdb_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) if (*idx < cb->args[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) goto skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) if (filter_dev && (!f->dst || f->dst->dev != filter_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) if (filter_dev != dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) goto skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) /* !f->dst is a special case for bridge
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) * It means the MAC belongs to the bridge
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) * Therefore need a little more filtering
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) * we only want to dump the !f->dst case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) if (f->dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) goto skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) if (!filter_dev && f->dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) goto skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) err = fdb_fill_info(skb, br, f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) NETLINK_CB(cb->skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) cb->nlh->nlmsg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) RTM_NEWNEIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) NLM_F_MULTI);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) skip:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) *idx += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) int br_fdb_get(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) struct nlattr *tb[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) const unsigned char *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) u16 vid, u32 portid, u32 seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) struct net_bridge *br = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) struct net_bridge_fdb_entry *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) f = br_fdb_find_rcu(br, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) if (!f) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) NL_SET_ERR_MSG(extack, "Fdb entry not found");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) err = fdb_fill_info(skb, br, f, portid, seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) RTM_NEWNEIGH, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) errout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) /* returns true if the fdb is modified */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) static bool fdb_handle_notify(struct net_bridge_fdb_entry *fdb, u8 notify)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) bool modified = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) /* allow to mark an entry as inactive, usually done on creation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) if ((notify & FDB_NOTIFY_INACTIVE_BIT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) !test_and_set_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) if ((notify & FDB_NOTIFY_BIT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) !test_and_set_bit(BR_FDB_NOTIFY, &fdb->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) /* enabled activity tracking */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) } else if (!(notify & FDB_NOTIFY_BIT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) test_and_clear_bit(BR_FDB_NOTIFY, &fdb->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) /* disabled activity tracking, clear notify state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) clear_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) return modified;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) /* Update (create or replace) forwarding database entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) static int fdb_add_entry(struct net_bridge *br, struct net_bridge_port *source,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) const u8 *addr, struct ndmsg *ndm, u16 flags, u16 vid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) struct nlattr *nfea_tb[])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) bool is_sticky = !!(ndm->ndm_flags & NTF_STICKY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) bool refresh = !nfea_tb[NFEA_DONT_REFRESH];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) struct net_bridge_fdb_entry *fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) u16 state = ndm->ndm_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) bool modified = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) u8 notify = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) /* If the port cannot learn allow only local and static entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) if (source && !(state & NUD_PERMANENT) && !(state & NUD_NOARP) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) !(source->state == BR_STATE_LEARNING ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) source->state == BR_STATE_FORWARDING))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) if (!source && !(state & NUD_PERMANENT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) pr_info("bridge: RTM_NEWNEIGH %s without NUD_PERMANENT\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) br->dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) if (is_sticky && (state & NUD_PERMANENT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) if (nfea_tb[NFEA_ACTIVITY_NOTIFY]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) notify = nla_get_u8(nfea_tb[NFEA_ACTIVITY_NOTIFY]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) if ((notify & ~BR_FDB_NOTIFY_SETTABLE_BITS) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) (notify & BR_FDB_NOTIFY_SETTABLE_BITS) == FDB_NOTIFY_INACTIVE_BIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) fdb = br_fdb_find(br, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) if (fdb == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) if (!(flags & NLM_F_CREATE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) fdb = fdb_create(br, source, addr, vid, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) if (!fdb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) if (flags & NLM_F_EXCL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) if (fdb->dst != source) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) fdb->dst = source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) if (fdb_to_nud(br, fdb) != state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) if (state & NUD_PERMANENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) set_bit(BR_FDB_LOCAL, &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) if (!test_and_set_bit(BR_FDB_STATIC, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) fdb_add_hw_addr(br, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) } else if (state & NUD_NOARP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) clear_bit(BR_FDB_LOCAL, &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) if (!test_and_set_bit(BR_FDB_STATIC, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) fdb_add_hw_addr(br, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) clear_bit(BR_FDB_LOCAL, &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) if (test_and_clear_bit(BR_FDB_STATIC, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) fdb_del_hw_addr(br, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) if (is_sticky != test_bit(BR_FDB_STICKY, &fdb->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) change_bit(BR_FDB_STICKY, &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) if (fdb_handle_notify(fdb, notify))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) set_bit(BR_FDB_ADDED_BY_USER, &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) fdb->used = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) if (modified) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) if (refresh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) fdb->updated = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) fdb_notify(br, fdb, RTM_NEWNEIGH, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) struct net_bridge_port *p, const unsigned char *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) u16 nlh_flags, u16 vid, struct nlattr *nfea_tb[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) if (ndm->ndm_flags & NTF_USE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) if (!p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) pr_info("bridge: RTM_NEWNEIGH %s with NTF_USE is not supported\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) br->dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) if (!nbp_state_should_learn(p))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) local_bh_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) br_fdb_update(br, p, addr, vid, BIT(BR_FDB_ADDED_BY_USER));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) local_bh_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) } else if (ndm->ndm_flags & NTF_EXT_LEARNED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) if (!p && !(ndm->ndm_state & NUD_PERMANENT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) NL_SET_ERR_MSG_MOD(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) "FDB entry towards bridge must be permanent");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) err = br_fdb_external_learn_add(br, p, addr, vid, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) err = fdb_add_entry(br, p, addr, ndm, nlh_flags, vid, nfea_tb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) static const struct nla_policy br_nda_fdb_pol[NFEA_MAX + 1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) [NFEA_ACTIVITY_NOTIFY] = { .type = NLA_U8 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) [NFEA_DONT_REFRESH] = { .type = NLA_FLAG },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) /* Add new permanent fdb entry with RTM_NEWNEIGH */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) const unsigned char *addr, u16 vid, u16 nlh_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) struct nlattr *nfea_tb[NFEA_MAX + 1], *attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) struct net_bridge_vlan_group *vg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) struct net_bridge_port *p = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) struct net_bridge_vlan *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) struct net_bridge *br = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) trace_br_fdb_add(ndm, dev, addr, vid, nlh_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) if (is_zero_ether_addr(addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) if (dev->priv_flags & IFF_EBRIDGE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) br = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) vg = br_vlan_group(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) p = br_port_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) if (!p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) br = p->br;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) vg = nbp_vlan_group(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) if (tb[NDA_FDB_EXT_ATTRS]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) attr = tb[NDA_FDB_EXT_ATTRS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) err = nla_parse_nested(nfea_tb, NFEA_MAX, attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) br_nda_fdb_pol, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) memset(nfea_tb, 0, sizeof(struct nlattr *) * (NFEA_MAX + 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) if (vid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) v = br_vlan_find(vg, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) if (!v || !br_vlan_should_use(v)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) pr_info("bridge: RTM_NEWNEIGH with unconfigured vlan %d on %s\n", vid, dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) /* VID was specified, so use it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) err = __br_fdb_add(ndm, br, p, addr, nlh_flags, vid, nfea_tb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) err = __br_fdb_add(ndm, br, p, addr, nlh_flags, 0, nfea_tb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) if (err || !vg || !vg->num_vlans)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) /* We have vlans configured on this port and user didn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) * specify a VLAN. To be nice, add/update entry for every
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) * vlan on this port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) list_for_each_entry(v, &vg->vlan_list, vlist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) if (!br_vlan_should_use(v))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) err = __br_fdb_add(ndm, br, p, addr, nlh_flags, v->vid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) nfea_tb, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) static int fdb_delete_by_addr_and_port(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) const struct net_bridge_port *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) const u8 *addr, u16 vlan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) struct net_bridge_fdb_entry *fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) fdb = br_fdb_find(br, addr, vlan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) if (!fdb || fdb->dst != p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) fdb_delete(br, fdb, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) static int __br_fdb_delete(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) const struct net_bridge_port *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) const unsigned char *addr, u16 vid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) err = fdb_delete_by_addr_and_port(br, p, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) /* Remove neighbor entry with RTM_DELNEIGH */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) const unsigned char *addr, u16 vid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) struct net_bridge_vlan_group *vg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) struct net_bridge_port *p = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) struct net_bridge_vlan *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) struct net_bridge *br;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) if (dev->priv_flags & IFF_EBRIDGE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) br = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) vg = br_vlan_group(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) p = br_port_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) if (!p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) vg = nbp_vlan_group(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) br = p->br;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) if (vid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) v = br_vlan_find(vg, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) if (!v) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) pr_info("bridge: RTM_DELNEIGH with unconfigured vlan %d on %s\n", vid, dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) err = __br_fdb_delete(br, p, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) err &= __br_fdb_delete(br, p, addr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) if (!vg || !vg->num_vlans)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) list_for_each_entry(v, &vg->vlan_list, vlist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) if (!br_vlan_should_use(v))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) err &= __br_fdb_delete(br, p, addr, v->vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) struct net_bridge_fdb_entry *f, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) /* the key here is that static entries change only under rtnl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) hlist_for_each_entry_rcu(f, &br->fdb_list, fdb_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) /* We only care for static entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) if (!test_bit(BR_FDB_STATIC, &f->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) err = dev_uc_add(p->dev, f->key.addr.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) goto rollback;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) rollback:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) hlist_for_each_entry_rcu(tmp, &br->fdb_list, fdb_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) /* We only care for static entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) if (!test_bit(BR_FDB_STATIC, &tmp->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) if (tmp == f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) dev_uc_del(p->dev, tmp->key.addr.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) struct net_bridge_fdb_entry *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) hlist_for_each_entry_rcu(f, &br->fdb_list, fdb_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) /* We only care for static entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) if (!test_bit(BR_FDB_STATIC, &f->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) dev_uc_del(p->dev, f->key.addr.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) const unsigned char *addr, u16 vid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) bool swdev_notify)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) struct net_bridge_fdb_entry *fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) bool modified = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) trace_br_fdb_external_learn_add(br, p, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) fdb = br_fdb_find(br, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) if (!fdb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) unsigned long flags = BIT(BR_FDB_ADDED_BY_EXT_LEARN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) if (swdev_notify)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) flags |= BIT(BR_FDB_ADDED_BY_USER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) if (!p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) flags |= BIT(BR_FDB_LOCAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) fdb = fdb_create(br, p, addr, vid, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) if (!fdb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) goto err_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) fdb_notify(br, fdb, RTM_NEWNEIGH, swdev_notify);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) fdb->updated = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) if (fdb->dst != p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) fdb->dst = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) if (test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) /* Refresh entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) fdb->used = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) } else if (!test_bit(BR_FDB_ADDED_BY_USER, &fdb->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) /* Take over SW learned entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) set_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) if (swdev_notify)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) set_bit(BR_FDB_ADDED_BY_USER, &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) if (!p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) set_bit(BR_FDB_LOCAL, &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) if (modified)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) fdb_notify(br, fdb, RTM_NEWNEIGH, swdev_notify);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) err_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) const unsigned char *addr, u16 vid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) bool swdev_notify)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) struct net_bridge_fdb_entry *fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) fdb = br_fdb_find(br, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) if (fdb && test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) fdb_delete(br, fdb, swdev_notify);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) const unsigned char *addr, u16 vid, bool offloaded)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) struct net_bridge_fdb_entry *fdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) spin_lock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) fdb = br_fdb_find(br, addr, vid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) if (fdb && offloaded != test_bit(BR_FDB_OFFLOADED, &fdb->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) change_bit(BR_FDB_OFFLOADED, &fdb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) spin_unlock_bh(&br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) void br_fdb_clear_offload(const struct net_device *dev, u16 vid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) struct net_bridge_fdb_entry *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) p = br_port_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) if (!p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) spin_lock_bh(&p->br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) hlist_for_each_entry(f, &p->br->fdb_list, fdb_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) if (f->dst == p && f->key.vlan_id == vid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) clear_bit(BR_FDB_OFFLOADED, &f->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) spin_unlock_bh(&p->br->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) EXPORT_SYMBOL_GPL(br_fdb_clear_offload);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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