Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Forwarding database |
| 3 | * Linux ethernet bridge |
| 4 | * |
| 5 | * Authors: |
| 6 | * Lennert Buytenhek <buytenh@gnu.org> |
| 7 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version |
| 11 | * 2 of the License, or (at your option) any later version. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/init.h> |
Franck Bui-Huu | 8252474 | 2008-05-12 21:21:05 +0200 | [diff] [blame] | 16 | #include <linux/rculist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/spinlock.h> |
| 18 | #include <linux/times.h> |
| 19 | #include <linux/netdevice.h> |
| 20 | #include <linux/etherdevice.h> |
| 21 | #include <linux/jhash.h> |
Stephen Hemminger | 3f89092 | 2007-03-21 13:42:33 -0700 | [diff] [blame] | 22 | #include <linux/random.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 24 | #include <linux/atomic.h> |
Stephen Hemminger | 3f89092 | 2007-03-21 13:42:33 -0700 | [diff] [blame] | 25 | #include <asm/unaligned.h> |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 26 | #include <linux/if_vlan.h> |
Scott Feldman | b4ad7ba | 2015-06-14 11:33:11 -0700 | [diff] [blame] | 27 | #include <net/switchdev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "br_private.h" |
| 29 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 30 | static struct kmem_cache *br_fdb_cache __read_mostly; |
Toshiaki Makita | 424bb9c | 2014-02-07 16:48:25 +0900 | [diff] [blame] | 31 | static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, |
| 32 | const unsigned char *addr, |
| 33 | __u16 vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 35 | const unsigned char *addr, u16 vid); |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 36 | static void fdb_notify(struct net_bridge *br, |
| 37 | const struct net_bridge_fdb_entry *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Stephen Hemminger | 3f89092 | 2007-03-21 13:42:33 -0700 | [diff] [blame] | 39 | static u32 fdb_salt __read_mostly; |
| 40 | |
Akinobu Mita | 87a596e | 2007-04-07 18:57:07 +0900 | [diff] [blame] | 41 | int __init br_fdb_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | { |
| 43 | br_fdb_cache = kmem_cache_create("bridge_fdb_cache", |
| 44 | sizeof(struct net_bridge_fdb_entry), |
| 45 | 0, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 46 | SLAB_HWCACHE_ALIGN, NULL); |
Akinobu Mita | 87a596e | 2007-04-07 18:57:07 +0900 | [diff] [blame] | 47 | if (!br_fdb_cache) |
| 48 | return -ENOMEM; |
| 49 | |
Stephen Hemminger | 3f89092 | 2007-03-21 13:42:33 -0700 | [diff] [blame] | 50 | get_random_bytes(&fdb_salt, sizeof(fdb_salt)); |
Akinobu Mita | 87a596e | 2007-04-07 18:57:07 +0900 | [diff] [blame] | 51 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | } |
| 53 | |
Andrew Morton | 73afc90 | 2007-12-05 21:35:23 -0800 | [diff] [blame] | 54 | void br_fdb_fini(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | { |
| 56 | kmem_cache_destroy(br_fdb_cache); |
| 57 | } |
| 58 | |
| 59 | |
| 60 | /* if topology_changing then use forward_delay (default 15 sec) |
| 61 | * otherwise keep longer (default 5 minutes) |
| 62 | */ |
Stephen Hemminger | 3f89092 | 2007-03-21 13:42:33 -0700 | [diff] [blame] | 63 | static inline unsigned long hold_time(const struct net_bridge *br) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
| 65 | return br->topology_change ? br->forward_delay : br->ageing_time; |
| 66 | } |
| 67 | |
Stephen Hemminger | 3f89092 | 2007-03-21 13:42:33 -0700 | [diff] [blame] | 68 | static inline int has_expired(const struct net_bridge *br, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | const struct net_bridge_fdb_entry *fdb) |
| 70 | { |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 71 | return !fdb->is_static && |
stephen hemminger | 7cd8861 | 2011-04-04 14:03:28 +0000 | [diff] [blame] | 72 | time_before_eq(fdb->updated + hold_time(br), jiffies); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | } |
| 74 | |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 75 | static inline int br_mac_hash(const unsigned char *mac, __u16 vid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | { |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 77 | /* use 1 byte of OUI and 3 bytes of NIC */ |
Stephen Hemminger | 3f89092 | 2007-03-21 13:42:33 -0700 | [diff] [blame] | 78 | u32 key = get_unaligned((u32 *)(mac + 2)); |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 79 | return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | } |
| 81 | |
Michał Mirosław | da67829 | 2009-06-05 05:35:28 +0000 | [diff] [blame] | 82 | static void fdb_rcu_free(struct rcu_head *head) |
| 83 | { |
| 84 | struct net_bridge_fdb_entry *ent |
| 85 | = container_of(head, struct net_bridge_fdb_entry, rcu); |
| 86 | kmem_cache_free(br_fdb_cache, ent); |
| 87 | } |
| 88 | |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 89 | /* When a static FDB entry is added, the mac address from the entry is |
| 90 | * added to the bridge private HW address list and all required ports |
| 91 | * are then updated with the new information. |
| 92 | * Called under RTNL. |
| 93 | */ |
Jiri Pirko | 020ec6b | 2014-11-28 14:34:12 +0100 | [diff] [blame] | 94 | static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr) |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 95 | { |
| 96 | int err; |
Li RongQing | a3f5ee7 | 2014-06-18 16:07:16 +0800 | [diff] [blame] | 97 | struct net_bridge_port *p; |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 98 | |
| 99 | ASSERT_RTNL(); |
| 100 | |
| 101 | list_for_each_entry(p, &br->port_list, list) { |
| 102 | if (!br_promisc_port(p)) { |
| 103 | err = dev_uc_add(p->dev, addr); |
| 104 | if (err) |
| 105 | goto undo; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | return; |
| 110 | undo: |
Li RongQing | a3f5ee7 | 2014-06-18 16:07:16 +0800 | [diff] [blame] | 111 | list_for_each_entry_continue_reverse(p, &br->port_list, list) { |
| 112 | if (!br_promisc_port(p)) |
| 113 | dev_uc_del(p->dev, addr); |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 114 | } |
| 115 | } |
| 116 | |
| 117 | /* When a static FDB entry is deleted, the HW address from that entry is |
| 118 | * also removed from the bridge private HW address list and updates all |
| 119 | * the ports with needed information. |
| 120 | * Called under RTNL. |
| 121 | */ |
Jiri Pirko | 020ec6b | 2014-11-28 14:34:12 +0100 | [diff] [blame] | 122 | static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr) |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 123 | { |
| 124 | struct net_bridge_port *p; |
| 125 | |
| 126 | ASSERT_RTNL(); |
| 127 | |
| 128 | list_for_each_entry(p, &br->port_list, list) { |
| 129 | if (!br_promisc_port(p)) |
| 130 | dev_uc_del(p->dev, addr); |
| 131 | } |
| 132 | } |
| 133 | |
Scott Feldman | b4ad7ba | 2015-06-14 11:33:11 -0700 | [diff] [blame] | 134 | static void fdb_del_external_learn(struct net_bridge_fdb_entry *f) |
| 135 | { |
Jiri Pirko | 52ba57c | 2015-10-01 11:03:44 +0200 | [diff] [blame] | 136 | struct switchdev_obj_port_fdb fdb = { |
Jiri Pirko | 9e8f4a5 | 2015-10-01 11:03:46 +0200 | [diff] [blame] | 137 | .obj.id = SWITCHDEV_OBJ_ID_PORT_FDB, |
Vivien Didelot | ab06900 | 2015-09-29 12:07:17 -0400 | [diff] [blame] | 138 | .vid = f->vlan_id, |
Scott Feldman | b4ad7ba | 2015-06-14 11:33:11 -0700 | [diff] [blame] | 139 | }; |
| 140 | |
Jiri Pirko | 850d0cb | 2015-10-14 19:40:51 +0200 | [diff] [blame^] | 141 | ether_addr_copy(fdb.addr, f->addr.addr); |
Jiri Pirko | 9e8f4a5 | 2015-10-01 11:03:46 +0200 | [diff] [blame] | 142 | switchdev_port_obj_del(f->dst->dev, &fdb.obj); |
Scott Feldman | b4ad7ba | 2015-06-14 11:33:11 -0700 | [diff] [blame] | 143 | } |
| 144 | |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 145 | static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 147 | if (f->is_static) |
Jiri Pirko | 020ec6b | 2014-11-28 14:34:12 +0100 | [diff] [blame] | 148 | fdb_del_hw_addr(br, f->addr.addr); |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 149 | |
Scott Feldman | b4ad7ba | 2015-06-14 11:33:11 -0700 | [diff] [blame] | 150 | if (f->added_by_external_learn) |
| 151 | fdb_del_external_learn(f); |
| 152 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | hlist_del_rcu(&f->hlist); |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 154 | fdb_notify(br, f, RTM_DELNEIGH); |
Michał Mirosław | da67829 | 2009-06-05 05:35:28 +0000 | [diff] [blame] | 155 | call_rcu(&f->rcu, fdb_rcu_free); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | } |
| 157 | |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 158 | /* Delete a local entry if no other port had the same address. */ |
| 159 | static void fdb_delete_local(struct net_bridge *br, |
| 160 | const struct net_bridge_port *p, |
| 161 | struct net_bridge_fdb_entry *f) |
| 162 | { |
| 163 | const unsigned char *addr = f->addr.addr; |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 164 | struct net_bridge_vlan_group *vg; |
| 165 | const struct net_bridge_vlan *v; |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 166 | struct net_bridge_port *op; |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 167 | u16 vid = f->vlan_id; |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 168 | |
| 169 | /* Maybe another port has same hw addr? */ |
| 170 | list_for_each_entry(op, &br->port_list, list) { |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 171 | vg = nbp_vlan_group(op); |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 172 | if (op != p && ether_addr_equal(op->dev->dev_addr, addr) && |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 173 | (!vid || br_vlan_find(vg, vid))) { |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 174 | f->dst = op; |
Toshiaki Makita | a778e6d | 2014-02-07 16:48:24 +0900 | [diff] [blame] | 175 | f->added_by_user = 0; |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 176 | return; |
| 177 | } |
| 178 | } |
| 179 | |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 180 | vg = br_vlan_group(br); |
| 181 | v = br_vlan_find(vg, vid); |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 182 | /* Maybe bridge device has same hw addr? */ |
| 183 | if (p && ether_addr_equal(br->dev->dev_addr, addr) && |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 184 | (!vid || (v && br_vlan_should_use(v)))) { |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 185 | f->dst = NULL; |
Toshiaki Makita | a778e6d | 2014-02-07 16:48:24 +0900 | [diff] [blame] | 186 | f->added_by_user = 0; |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 187 | return; |
| 188 | } |
| 189 | |
| 190 | fdb_delete(br, f); |
| 191 | } |
| 192 | |
Toshiaki Makita | 424bb9c | 2014-02-07 16:48:25 +0900 | [diff] [blame] | 193 | void br_fdb_find_delete_local(struct net_bridge *br, |
| 194 | const struct net_bridge_port *p, |
| 195 | const unsigned char *addr, u16 vid) |
| 196 | { |
| 197 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
| 198 | struct net_bridge_fdb_entry *f; |
| 199 | |
| 200 | spin_lock_bh(&br->hash_lock); |
| 201 | f = fdb_find(head, addr, vid); |
| 202 | if (f && f->is_local && !f->added_by_user && f->dst == p) |
| 203 | fdb_delete_local(br, p, f); |
| 204 | spin_unlock_bh(&br->hash_lock); |
| 205 | } |
| 206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) |
| 208 | { |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 209 | struct net_bridge_vlan_group *vg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | struct net_bridge *br = p->br; |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 211 | struct net_bridge_vlan *v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | int i; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | spin_lock_bh(&br->hash_lock); |
| 215 | |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 216 | vg = nbp_vlan_group(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | /* Search all chains since old address/hash is unknown */ |
| 218 | for (i = 0; i < BR_HASH_SIZE; i++) { |
| 219 | struct hlist_node *h; |
| 220 | hlist_for_each(h, &br->hash[i]) { |
| 221 | struct net_bridge_fdb_entry *f; |
| 222 | |
| 223 | f = hlist_entry(h, struct net_bridge_fdb_entry, hlist); |
Toshiaki Makita | a5642ab | 2014-02-07 16:48:18 +0900 | [diff] [blame] | 224 | if (f->dst == p && f->is_local && !f->added_by_user) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | /* delete old one */ |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 226 | fdb_delete_local(br, p, f); |
| 227 | |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 228 | /* if this port has no vlan information |
| 229 | * configured, we can safely be done at |
| 230 | * this point. |
| 231 | */ |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 232 | if (!vg || !vg->num_vlans) |
Toshiaki Makita | 2836882 | 2014-02-07 16:48:19 +0900 | [diff] [blame] | 233 | goto insert; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | } |
| 235 | } |
| 236 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
Toshiaki Makita | 2836882 | 2014-02-07 16:48:19 +0900 | [diff] [blame] | 238 | insert: |
| 239 | /* insert new address, may fail if invalid address or dup. */ |
| 240 | fdb_insert(br, p, newaddr, 0); |
| 241 | |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 242 | if (!vg || !vg->num_vlans) |
Toshiaki Makita | 2836882 | 2014-02-07 16:48:19 +0900 | [diff] [blame] | 243 | goto done; |
| 244 | |
| 245 | /* Now add entries for every VLAN configured on the port. |
| 246 | * This function runs under RTNL so the bitmap will not change |
| 247 | * from under us. |
| 248 | */ |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 249 | list_for_each_entry(v, &vg->vlan_list, vlist) |
| 250 | fdb_insert(br, p, newaddr, v->vid); |
Toshiaki Makita | 2836882 | 2014-02-07 16:48:19 +0900 | [diff] [blame] | 251 | |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 252 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | spin_unlock_bh(&br->hash_lock); |
| 254 | } |
| 255 | |
stephen hemminger | 4359881 | 2011-12-08 07:17:49 +0000 | [diff] [blame] | 256 | void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) |
| 257 | { |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 258 | struct net_bridge_vlan_group *vg; |
stephen hemminger | 4359881 | 2011-12-08 07:17:49 +0000 | [diff] [blame] | 259 | struct net_bridge_fdb_entry *f; |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 260 | struct net_bridge_vlan *v; |
stephen hemminger | 4359881 | 2011-12-08 07:17:49 +0000 | [diff] [blame] | 261 | |
Toshiaki Makita | ac4c886 | 2014-02-07 16:48:26 +0900 | [diff] [blame] | 262 | spin_lock_bh(&br->hash_lock); |
| 263 | |
stephen hemminger | 4359881 | 2011-12-08 07:17:49 +0000 | [diff] [blame] | 264 | /* If old entry was unassociated with any port, then delete it. */ |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 265 | f = __br_fdb_get(br, br->dev->dev_addr, 0); |
stephen hemminger | 4359881 | 2011-12-08 07:17:49 +0000 | [diff] [blame] | 266 | if (f && f->is_local && !f->dst) |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 267 | fdb_delete_local(br, NULL, f); |
stephen hemminger | 4359881 | 2011-12-08 07:17:49 +0000 | [diff] [blame] | 268 | |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 269 | fdb_insert(br, NULL, newaddr, 0); |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 270 | vg = br_vlan_group(br); |
| 271 | if (!vg || !vg->num_vlans) |
| 272 | goto out; |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 273 | /* Now remove and add entries for every VLAN configured on the |
| 274 | * bridge. This function runs under RTNL so the bitmap will not |
| 275 | * change from under us. |
| 276 | */ |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 277 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
| 278 | f = __br_fdb_get(br, br->dev->dev_addr, v->vid); |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 279 | if (f && f->is_local && !f->dst) |
Toshiaki Makita | 960b589 | 2014-02-07 16:48:23 +0900 | [diff] [blame] | 280 | fdb_delete_local(br, NULL, f); |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 281 | fdb_insert(br, NULL, newaddr, v->vid); |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 282 | } |
Toshiaki Makita | ac4c886 | 2014-02-07 16:48:26 +0900 | [diff] [blame] | 283 | out: |
| 284 | spin_unlock_bh(&br->hash_lock); |
stephen hemminger | 4359881 | 2011-12-08 07:17:49 +0000 | [diff] [blame] | 285 | } |
| 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | void br_fdb_cleanup(unsigned long _data) |
| 288 | { |
| 289 | struct net_bridge *br = (struct net_bridge *)_data; |
| 290 | unsigned long delay = hold_time(br); |
stephen hemminger | 25442e0 | 2010-06-15 06:14:12 +0000 | [diff] [blame] | 291 | unsigned long next_timer = jiffies + br->ageing_time; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | int i; |
| 293 | |
Eric Dumazet | 27a4293 | 2012-01-16 04:35:50 +0000 | [diff] [blame] | 294 | spin_lock(&br->hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | for (i = 0; i < BR_HASH_SIZE; i++) { |
| 296 | struct net_bridge_fdb_entry *f; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 297 | struct hlist_node *n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 299 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { |
Baruch Even | 071f772 | 2007-05-31 01:20:45 -0700 | [diff] [blame] | 300 | unsigned long this_timer; |
David S. Miller | 3fcf901 | 2015-02-04 23:52:44 -0800 | [diff] [blame] | 301 | if (f->is_static) |
Baruch Even | 071f772 | 2007-05-31 01:20:45 -0700 | [diff] [blame] | 302 | continue; |
Siva Mannem | dcd45e0 | 2015-09-23 08:39:19 -0700 | [diff] [blame] | 303 | if (f->added_by_external_learn) |
| 304 | continue; |
stephen hemminger | 7cd8861 | 2011-04-04 14:03:28 +0000 | [diff] [blame] | 305 | this_timer = f->updated + delay; |
Baruch Even | 071f772 | 2007-05-31 01:20:45 -0700 | [diff] [blame] | 306 | if (time_before_eq(this_timer, jiffies)) |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 307 | fdb_delete(br, f); |
Fabio Checconi | 2bec008 | 2008-03-20 15:54:58 -0700 | [diff] [blame] | 308 | else if (time_before(this_timer, next_timer)) |
Baruch Even | 071f772 | 2007-05-31 01:20:45 -0700 | [diff] [blame] | 309 | next_timer = this_timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } |
| 311 | } |
Eric Dumazet | 27a4293 | 2012-01-16 04:35:50 +0000 | [diff] [blame] | 312 | spin_unlock(&br->hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
stephen hemminger | 25442e0 | 2010-06-15 06:14:12 +0000 | [diff] [blame] | 314 | mod_timer(&br->gc_timer, round_jiffies_up(next_timer)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | } |
| 316 | |
Stephen Hemminger | 9cf6374 | 2007-04-09 12:57:54 -0700 | [diff] [blame] | 317 | /* Completely flush all dynamic entries in forwarding database.*/ |
| 318 | void br_fdb_flush(struct net_bridge *br) |
| 319 | { |
| 320 | int i; |
Stephen Hemminger | 1a62069 | 2006-10-12 14:45:38 -0700 | [diff] [blame] | 321 | |
Stephen Hemminger | 9cf6374 | 2007-04-09 12:57:54 -0700 | [diff] [blame] | 322 | spin_lock_bh(&br->hash_lock); |
| 323 | for (i = 0; i < BR_HASH_SIZE; i++) { |
| 324 | struct net_bridge_fdb_entry *f; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 325 | struct hlist_node *n; |
| 326 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { |
Stephen Hemminger | 9cf6374 | 2007-04-09 12:57:54 -0700 | [diff] [blame] | 327 | if (!f->is_static) |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 328 | fdb_delete(br, f); |
Stephen Hemminger | 9cf6374 | 2007-04-09 12:57:54 -0700 | [diff] [blame] | 329 | } |
| 330 | } |
| 331 | spin_unlock_bh(&br->hash_lock); |
| 332 | } |
| 333 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 334 | /* Flush all entries referring to a specific port. |
Stephen Hemminger | 9cf6374 | 2007-04-09 12:57:54 -0700 | [diff] [blame] | 335 | * if do_all is set also flush static entries |
Nikolay Aleksandrov | 1ea2d02 | 2015-06-23 05:28:16 -0700 | [diff] [blame] | 336 | * if vid is set delete all entries that match the vlan_id |
Stephen Hemminger | 9cf6374 | 2007-04-09 12:57:54 -0700 | [diff] [blame] | 337 | */ |
Stephen Hemminger | 1a62069 | 2006-10-12 14:45:38 -0700 | [diff] [blame] | 338 | void br_fdb_delete_by_port(struct net_bridge *br, |
| 339 | const struct net_bridge_port *p, |
Nikolay Aleksandrov | 1ea2d02 | 2015-06-23 05:28:16 -0700 | [diff] [blame] | 340 | u16 vid, |
Stephen Hemminger | 1a62069 | 2006-10-12 14:45:38 -0700 | [diff] [blame] | 341 | int do_all) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | { |
| 343 | int i; |
| 344 | |
| 345 | spin_lock_bh(&br->hash_lock); |
| 346 | for (i = 0; i < BR_HASH_SIZE; i++) { |
| 347 | struct hlist_node *h, *g; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | hlist_for_each_safe(h, g, &br->hash[i]) { |
| 350 | struct net_bridge_fdb_entry *f |
| 351 | = hlist_entry(h, struct net_bridge_fdb_entry, hlist); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 352 | if (f->dst != p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | continue; |
| 354 | |
Nikolay Aleksandrov | 1ea2d02 | 2015-06-23 05:28:16 -0700 | [diff] [blame] | 355 | if (!do_all) |
| 356 | if (f->is_static || (vid && f->vlan_id != vid)) |
| 357 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
Toshiaki Makita | a778e6d | 2014-02-07 16:48:24 +0900 | [diff] [blame] | 359 | if (f->is_local) |
| 360 | fdb_delete_local(br, p, f); |
| 361 | else |
| 362 | fdb_delete(br, f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | } |
| 364 | } |
| 365 | spin_unlock_bh(&br->hash_lock); |
| 366 | } |
| 367 | |
stephen hemminger | eeaf61d | 2010-07-27 08:26:30 +0000 | [diff] [blame] | 368 | /* No locking or refcounting, assumes caller has rcu_read_lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 370 | const unsigned char *addr, |
| 371 | __u16 vid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | struct net_bridge_fdb_entry *fdb; |
| 374 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 375 | hlist_for_each_entry_rcu(fdb, |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 376 | &br->hash[br_mac_hash(addr, vid)], hlist) { |
| 377 | if (ether_addr_equal(fdb->addr.addr, addr) && |
| 378 | fdb->vlan_id == vid) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | if (unlikely(has_expired(br, fdb))) |
| 380 | break; |
| 381 | return fdb; |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | return NULL; |
| 386 | } |
| 387 | |
Igor Maravić | e6373c4 | 2011-12-12 02:58:25 +0000 | [diff] [blame] | 388 | #if IS_ENABLED(CONFIG_ATM_LANE) |
Michał Mirosław | da67829 | 2009-06-05 05:35:28 +0000 | [diff] [blame] | 389 | /* Interface used by ATM LANE hook to test |
| 390 | * if an addr is on some other bridge port */ |
| 391 | int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | { |
| 393 | struct net_bridge_fdb_entry *fdb; |
stephen hemminger | b5ed54e | 2010-11-15 06:38:13 +0000 | [diff] [blame] | 394 | struct net_bridge_port *port; |
Michał Mirosław | da67829 | 2009-06-05 05:35:28 +0000 | [diff] [blame] | 395 | int ret; |
| 396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | rcu_read_lock(); |
stephen hemminger | b5ed54e | 2010-11-15 06:38:13 +0000 | [diff] [blame] | 398 | port = br_port_get_rcu(dev); |
| 399 | if (!port) |
| 400 | ret = 0; |
| 401 | else { |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 402 | fdb = __br_fdb_get(port->br, addr, 0); |
stephen hemminger | 4359881 | 2011-12-08 07:17:49 +0000 | [diff] [blame] | 403 | ret = fdb && fdb->dst && fdb->dst->dev != dev && |
stephen hemminger | b5ed54e | 2010-11-15 06:38:13 +0000 | [diff] [blame] | 404 | fdb->dst->state == BR_STATE_FORWARDING; |
| 405 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
Michał Mirosław | da67829 | 2009-06-05 05:35:28 +0000 | [diff] [blame] | 408 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | } |
Michał Mirosław | da67829 | 2009-06-05 05:35:28 +0000 | [diff] [blame] | 410 | #endif /* CONFIG_ATM_LANE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
| 412 | /* |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 413 | * Fill buffer with forwarding table records in |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | * the API format. |
| 415 | */ |
| 416 | int br_fdb_fillbuf(struct net_bridge *br, void *buf, |
| 417 | unsigned long maxnum, unsigned long skip) |
| 418 | { |
| 419 | struct __fdb_entry *fe = buf; |
| 420 | int i, num = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | struct net_bridge_fdb_entry *f; |
| 422 | |
| 423 | memset(buf, 0, maxnum*sizeof(struct __fdb_entry)); |
| 424 | |
| 425 | rcu_read_lock(); |
| 426 | for (i = 0; i < BR_HASH_SIZE; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 427 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | if (num >= maxnum) |
| 429 | goto out; |
| 430 | |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 431 | if (has_expired(br, f)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | continue; |
| 433 | |
stephen hemminger | 4359881 | 2011-12-08 07:17:49 +0000 | [diff] [blame] | 434 | /* ignore pseudo entry for local MAC address */ |
| 435 | if (!f->dst) |
| 436 | continue; |
| 437 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | if (skip) { |
| 439 | --skip; |
| 440 | continue; |
| 441 | } |
| 442 | |
| 443 | /* convert from internal format to API */ |
| 444 | memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN); |
Stephen Hemminger | ae4f8fc | 2008-05-02 16:53:33 -0700 | [diff] [blame] | 445 | |
| 446 | /* due to ABI compat need to split into hi/lo */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | fe->port_no = f->dst->port_no; |
Stephen Hemminger | ae4f8fc | 2008-05-02 16:53:33 -0700 | [diff] [blame] | 448 | fe->port_hi = f->dst->port_no >> 8; |
| 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | fe->is_local = f->is_local; |
| 451 | if (!f->is_static) |
Eric Dumazet | a399a80 | 2012-08-08 21:13:53 +0000 | [diff] [blame] | 452 | fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | ++fe; |
| 454 | ++num; |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | out: |
| 459 | rcu_read_unlock(); |
| 460 | |
| 461 | return num; |
| 462 | } |
| 463 | |
stephen hemminger | 664de48 | 2011-04-04 14:03:29 +0000 | [diff] [blame] | 464 | static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 465 | const unsigned char *addr, |
| 466 | __u16 vid) |
stephen hemminger | 664de48 | 2011-04-04 14:03:29 +0000 | [diff] [blame] | 467 | { |
stephen hemminger | 664de48 | 2011-04-04 14:03:29 +0000 | [diff] [blame] | 468 | struct net_bridge_fdb_entry *fdb; |
| 469 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 470 | hlist_for_each_entry(fdb, head, hlist) { |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 471 | if (ether_addr_equal(fdb->addr.addr, addr) && |
| 472 | fdb->vlan_id == vid) |
stephen hemminger | 664de48 | 2011-04-04 14:03:29 +0000 | [diff] [blame] | 473 | return fdb; |
| 474 | } |
| 475 | return NULL; |
| 476 | } |
| 477 | |
| 478 | static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 479 | const unsigned char *addr, |
| 480 | __u16 vid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | struct net_bridge_fdb_entry *fdb; |
| 483 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 484 | hlist_for_each_entry_rcu(fdb, head, hlist) { |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 485 | if (ether_addr_equal(fdb->addr.addr, addr) && |
| 486 | fdb->vlan_id == vid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | return fdb; |
| 488 | } |
| 489 | return NULL; |
| 490 | } |
| 491 | |
| 492 | static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, |
| 493 | struct net_bridge_port *source, |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 494 | const unsigned char *addr, |
| 495 | __u16 vid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | { |
| 497 | struct net_bridge_fdb_entry *fdb; |
| 498 | |
| 499 | fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); |
| 500 | if (fdb) { |
| 501 | memcpy(fdb->addr.addr, addr, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | fdb->dst = source; |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 503 | fdb->vlan_id = vid; |
stephen hemminger | 03e9b64 | 2011-04-04 14:03:27 +0000 | [diff] [blame] | 504 | fdb->is_local = 0; |
| 505 | fdb->is_static = 0; |
Toshiaki Makita | a5642ab | 2014-02-07 16:48:18 +0900 | [diff] [blame] | 506 | fdb->added_by_user = 0; |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 507 | fdb->added_by_external_learn = 0; |
stephen hemminger | 7cd8861 | 2011-04-04 14:03:28 +0000 | [diff] [blame] | 508 | fdb->updated = fdb->used = jiffies; |
Pavel Emelyanov | 1158f76 | 2011-02-04 13:02:36 -0800 | [diff] [blame] | 509 | hlist_add_head_rcu(&fdb->hlist, head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | } |
| 511 | return fdb; |
| 512 | } |
| 513 | |
| 514 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 515 | const unsigned char *addr, u16 vid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | { |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 517 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | struct net_bridge_fdb_entry *fdb; |
| 519 | |
| 520 | if (!is_valid_ether_addr(addr)) |
| 521 | return -EINVAL; |
| 522 | |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 523 | fdb = fdb_find(head, addr, vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | if (fdb) { |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 525 | /* it is okay to have multiple ports with same |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | * address, just use the first one. |
| 527 | */ |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 528 | if (fdb->is_local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | return 0; |
stephen hemminger | 28a16c9 | 2010-05-10 09:31:09 +0000 | [diff] [blame] | 530 | br_warn(br, "adding interface %s with same address " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | "as a received packet\n", |
Hong zhi guo | 9b46922 | 2013-03-23 02:27:50 +0000 | [diff] [blame] | 532 | source ? source->dev->name : br->dev->name); |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 533 | fdb_delete(br, fdb); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 534 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 536 | fdb = fdb_create(head, source, addr, vid); |
stephen hemminger | 03e9b64 | 2011-04-04 14:03:27 +0000 | [diff] [blame] | 537 | if (!fdb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | return -ENOMEM; |
| 539 | |
stephen hemminger | 03e9b64 | 2011-04-04 14:03:27 +0000 | [diff] [blame] | 540 | fdb->is_local = fdb->is_static = 1; |
Jiri Pirko | 020ec6b | 2014-11-28 14:34:12 +0100 | [diff] [blame] | 541 | fdb_add_hw_addr(br, addr); |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 542 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | return 0; |
| 544 | } |
| 545 | |
stephen hemminger | 03e9b64 | 2011-04-04 14:03:27 +0000 | [diff] [blame] | 546 | /* Add entry for local address of interface */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 548 | const unsigned char *addr, u16 vid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | { |
| 550 | int ret; |
| 551 | |
| 552 | spin_lock_bh(&br->hash_lock); |
Vlad Yasevich | bc9a25d | 2013-02-13 12:00:19 +0000 | [diff] [blame] | 553 | ret = fdb_insert(br, source, addr, vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | spin_unlock_bh(&br->hash_lock); |
| 555 | return ret; |
| 556 | } |
| 557 | |
| 558 | void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, |
Toshiaki Makita | a5642ab | 2014-02-07 16:48:18 +0900 | [diff] [blame] | 559 | const unsigned char *addr, u16 vid, bool added_by_user) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | { |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 561 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | struct net_bridge_fdb_entry *fdb; |
Jon Maxwell | c65c7a3 | 2014-05-29 17:27:16 +1000 | [diff] [blame] | 563 | bool fdb_modified = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
| 565 | /* some users want to always flood. */ |
| 566 | if (hold_time(br) == 0) |
| 567 | return; |
| 568 | |
Stephen Hemminger | df1c0b8 | 2007-08-30 22:15:35 -0700 | [diff] [blame] | 569 | /* ignore packets unless we are using this port */ |
| 570 | if (!(source->state == BR_STATE_LEARNING || |
| 571 | source->state == BR_STATE_FORWARDING)) |
| 572 | return; |
| 573 | |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 574 | fdb = fdb_find_rcu(head, addr, vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | if (likely(fdb)) { |
| 576 | /* attempt to update an entry for a local interface */ |
| 577 | if (unlikely(fdb->is_local)) { |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 578 | if (net_ratelimit()) |
stephen hemminger | 28a16c9 | 2010-05-10 09:31:09 +0000 | [diff] [blame] | 579 | br_warn(br, "received packet on %s with " |
| 580 | "own address as source address\n", |
| 581 | source->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | } else { |
| 583 | /* fastpath: update of existing entry */ |
Jon Maxwell | c65c7a3 | 2014-05-29 17:27:16 +1000 | [diff] [blame] | 584 | if (unlikely(source != fdb->dst)) { |
| 585 | fdb->dst = source; |
| 586 | fdb_modified = true; |
| 587 | } |
stephen hemminger | 7cd8861 | 2011-04-04 14:03:28 +0000 | [diff] [blame] | 588 | fdb->updated = jiffies; |
Toshiaki Makita | a5642ab | 2014-02-07 16:48:18 +0900 | [diff] [blame] | 589 | if (unlikely(added_by_user)) |
| 590 | fdb->added_by_user = 1; |
Jon Maxwell | c65c7a3 | 2014-05-29 17:27:16 +1000 | [diff] [blame] | 591 | if (unlikely(fdb_modified)) |
| 592 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | } |
| 594 | } else { |
Stephen Hemminger | f8ae737 | 2006-03-20 22:58:36 -0800 | [diff] [blame] | 595 | spin_lock(&br->hash_lock); |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 596 | if (likely(!fdb_find(head, addr, vid))) { |
| 597 | fdb = fdb_create(head, source, addr, vid); |
Toshiaki Makita | a5642ab | 2014-02-07 16:48:18 +0900 | [diff] [blame] | 598 | if (fdb) { |
| 599 | if (unlikely(added_by_user)) |
| 600 | fdb->added_by_user = 1; |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 601 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
Toshiaki Makita | a5642ab | 2014-02-07 16:48:18 +0900 | [diff] [blame] | 602 | } |
stephen hemminger | f58ee4e | 2011-12-06 13:02:24 +0000 | [diff] [blame] | 603 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | /* else we lose race and someone else inserts |
| 605 | * it first, don't bother updating |
| 606 | */ |
Stephen Hemminger | f8ae737 | 2006-03-20 22:58:36 -0800 | [diff] [blame] | 607 | spin_unlock(&br->hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | } |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 610 | |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 611 | static int fdb_to_nud(const struct net_bridge *br, |
| 612 | const struct net_bridge_fdb_entry *fdb) |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 613 | { |
| 614 | if (fdb->is_local) |
| 615 | return NUD_PERMANENT; |
| 616 | else if (fdb->is_static) |
| 617 | return NUD_NOARP; |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 618 | else if (has_expired(br, fdb)) |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 619 | return NUD_STALE; |
| 620 | else |
| 621 | return NUD_REACHABLE; |
| 622 | } |
| 623 | |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 624 | static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 625 | const struct net_bridge_fdb_entry *fdb, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 626 | u32 portid, u32 seq, int type, unsigned int flags) |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 627 | { |
| 628 | unsigned long now = jiffies; |
| 629 | struct nda_cacheinfo ci; |
| 630 | struct nlmsghdr *nlh; |
| 631 | struct ndmsg *ndm; |
| 632 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 633 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 634 | if (nlh == NULL) |
| 635 | return -EMSGSIZE; |
| 636 | |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 637 | ndm = nlmsg_data(nlh); |
| 638 | ndm->ndm_family = AF_BRIDGE; |
| 639 | ndm->ndm_pad1 = 0; |
| 640 | ndm->ndm_pad2 = 0; |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 641 | ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0; |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 642 | ndm->ndm_type = 0; |
stephen hemminger | 4359881 | 2011-12-08 07:17:49 +0000 | [diff] [blame] | 643 | ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 644 | ndm->ndm_state = fdb_to_nud(br, fdb); |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 645 | |
David S. Miller | 2eb812e | 2012-04-01 20:49:54 -0400 | [diff] [blame] | 646 | if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr)) |
| 647 | goto nla_put_failure; |
Roopa Prabhu | 41c389d | 2014-05-27 22:39:37 -0700 | [diff] [blame] | 648 | if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex)) |
| 649 | goto nla_put_failure; |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 650 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); |
| 651 | ci.ndm_confirmed = 0; |
| 652 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); |
| 653 | ci.ndm_refcnt = 0; |
David S. Miller | 2eb812e | 2012-04-01 20:49:54 -0400 | [diff] [blame] | 654 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) |
| 655 | goto nla_put_failure; |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 656 | |
Toshiaki Makita | 47fab41 | 2014-07-30 13:31:51 +0900 | [diff] [blame] | 657 | if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id)) |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 658 | goto nla_put_failure; |
| 659 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 660 | nlmsg_end(skb, nlh); |
| 661 | return 0; |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 662 | |
| 663 | nla_put_failure: |
| 664 | nlmsg_cancel(skb, nlh); |
| 665 | return -EMSGSIZE; |
| 666 | } |
| 667 | |
| 668 | static inline size_t fdb_nlmsg_size(void) |
| 669 | { |
| 670 | return NLMSG_ALIGN(sizeof(struct ndmsg)) |
| 671 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ |
Roopa Prabhu | 41c389d | 2014-05-27 22:39:37 -0700 | [diff] [blame] | 672 | + nla_total_size(sizeof(u32)) /* NDA_MASTER */ |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 673 | + nla_total_size(sizeof(u16)) /* NDA_VLAN */ |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 674 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
| 675 | } |
| 676 | |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 677 | static void fdb_notify(struct net_bridge *br, |
| 678 | const struct net_bridge_fdb_entry *fdb, int type) |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 679 | { |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 680 | struct net *net = dev_net(br->dev); |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 681 | struct sk_buff *skb; |
| 682 | int err = -ENOBUFS; |
| 683 | |
| 684 | skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); |
| 685 | if (skb == NULL) |
| 686 | goto errout; |
| 687 | |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 688 | err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 689 | if (err < 0) { |
| 690 | /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */ |
| 691 | WARN_ON(err == -EMSGSIZE); |
| 692 | kfree_skb(skb); |
| 693 | goto errout; |
| 694 | } |
| 695 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); |
| 696 | return; |
| 697 | errout: |
tanxiaojun | 87e823b | 2013-12-19 13:28:10 +0800 | [diff] [blame] | 698 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | /* Dump information about entries, in response to GETNEIGH */ |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 702 | int br_fdb_dump(struct sk_buff *skb, |
| 703 | struct netlink_callback *cb, |
| 704 | struct net_device *dev, |
Jamal Hadi Salim | 5d5eacb | 2014-07-10 07:01:58 -0400 | [diff] [blame] | 705 | struct net_device *filter_dev, |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 706 | int idx) |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 707 | { |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 708 | struct net_bridge *br = netdev_priv(dev); |
| 709 | int i; |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 710 | |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 711 | if (!(dev->priv_flags & IFF_EBRIDGE)) |
| 712 | goto out; |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 713 | |
Hubert Sokolowski | 6cb6974 | 2015-01-05 17:29:21 +0000 | [diff] [blame] | 714 | if (!filter_dev) |
| 715 | idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); |
| 716 | |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 717 | for (i = 0; i < BR_HASH_SIZE; i++) { |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 718 | struct net_bridge_fdb_entry *f; |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 719 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 720 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 721 | if (idx < cb->args[0]) |
| 722 | goto skip; |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 723 | |
Jamal Hadi Salim | 5e6d243 | 2014-07-10 07:01:59 -0400 | [diff] [blame] | 724 | if (filter_dev && |
| 725 | (!f->dst || f->dst->dev != filter_dev)) { |
| 726 | if (filter_dev != dev) |
| 727 | goto skip; |
Hubert Sokolowski | 6cb6974 | 2015-01-05 17:29:21 +0000 | [diff] [blame] | 728 | /* !f->dst is a special case for bridge |
Jamal Hadi Salim | 5e6d243 | 2014-07-10 07:01:59 -0400 | [diff] [blame] | 729 | * It means the MAC belongs to the bridge |
| 730 | * Therefore need a little more filtering |
| 731 | * we only want to dump the !f->dst case |
| 732 | */ |
| 733 | if (f->dst) |
| 734 | goto skip; |
| 735 | } |
Hubert Sokolowski | 6cb6974 | 2015-01-05 17:29:21 +0000 | [diff] [blame] | 736 | if (!filter_dev && f->dst) |
| 737 | goto skip; |
Jamal Hadi Salim | 5d5eacb | 2014-07-10 07:01:58 -0400 | [diff] [blame] | 738 | |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 739 | if (fdb_fill_info(skb, br, f, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 740 | NETLINK_CB(cb->skb).portid, |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 741 | cb->nlh->nlmsg_seq, |
| 742 | RTM_NEWNEIGH, |
| 743 | NLM_F_MULTI) < 0) |
| 744 | break; |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 745 | skip: |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 746 | ++idx; |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 747 | } |
| 748 | } |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 749 | |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 750 | out: |
| 751 | return idx; |
stephen hemminger | b078f0d | 2011-04-04 14:03:30 +0000 | [diff] [blame] | 752 | } |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 753 | |
stephen hemminger | 292d139 | 2011-11-09 18:30:08 +0000 | [diff] [blame] | 754 | /* Update (create or replace) forwarding database entry */ |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 755 | static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 756 | __u16 state, __u16 flags, __u16 vid) |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 757 | { |
| 758 | struct net_bridge *br = source->br; |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 759 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 760 | struct net_bridge_fdb_entry *fdb; |
roopa | b0a397f | 2013-04-22 12:56:49 +0000 | [diff] [blame] | 761 | bool modified = false; |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 762 | |
Wilson Kok | eb8d7ba | 2015-05-25 06:39:31 -0700 | [diff] [blame] | 763 | /* If the port cannot learn allow only local and static entries */ |
| 764 | if (!(state & NUD_PERMANENT) && !(state & NUD_NOARP) && |
| 765 | !(source->state == BR_STATE_LEARNING || |
| 766 | source->state == BR_STATE_FORWARDING)) |
| 767 | return -EPERM; |
| 768 | |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 769 | fdb = fdb_find(head, addr, vid); |
stephen hemminger | 64af1ba | 2011-09-30 14:37:27 +0000 | [diff] [blame] | 770 | if (fdb == NULL) { |
| 771 | if (!(flags & NLM_F_CREATE)) |
| 772 | return -ENOENT; |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 773 | |
Vlad Yasevich | 2ba071e | 2013-02-13 12:00:16 +0000 | [diff] [blame] | 774 | fdb = fdb_create(head, source, addr, vid); |
stephen hemminger | 64af1ba | 2011-09-30 14:37:27 +0000 | [diff] [blame] | 775 | if (!fdb) |
| 776 | return -ENOMEM; |
roopa | b0a397f | 2013-04-22 12:56:49 +0000 | [diff] [blame] | 777 | |
| 778 | modified = true; |
stephen hemminger | 64af1ba | 2011-09-30 14:37:27 +0000 | [diff] [blame] | 779 | } else { |
| 780 | if (flags & NLM_F_EXCL) |
| 781 | return -EEXIST; |
roopa | b0a397f | 2013-04-22 12:56:49 +0000 | [diff] [blame] | 782 | |
| 783 | if (fdb->dst != source) { |
| 784 | fdb->dst = source; |
| 785 | modified = true; |
| 786 | } |
stephen hemminger | 64af1ba | 2011-09-30 14:37:27 +0000 | [diff] [blame] | 787 | } |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 788 | |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 789 | if (fdb_to_nud(br, fdb) != state) { |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 790 | if (state & NUD_PERMANENT) { |
| 791 | fdb->is_local = 1; |
| 792 | if (!fdb->is_static) { |
| 793 | fdb->is_static = 1; |
Jiri Pirko | 020ec6b | 2014-11-28 14:34:12 +0100 | [diff] [blame] | 794 | fdb_add_hw_addr(br, addr); |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 795 | } |
| 796 | } else if (state & NUD_NOARP) { |
stephen hemminger | 292d139 | 2011-11-09 18:30:08 +0000 | [diff] [blame] | 797 | fdb->is_local = 0; |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 798 | if (!fdb->is_static) { |
| 799 | fdb->is_static = 1; |
Jiri Pirko | 020ec6b | 2014-11-28 14:34:12 +0100 | [diff] [blame] | 800 | fdb_add_hw_addr(br, addr); |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 801 | } |
| 802 | } else { |
| 803 | fdb->is_local = 0; |
| 804 | if (fdb->is_static) { |
| 805 | fdb->is_static = 0; |
Jiri Pirko | 020ec6b | 2014-11-28 14:34:12 +0100 | [diff] [blame] | 806 | fdb_del_hw_addr(br, addr); |
Vlad Yasevich | 145beee | 2014-05-16 09:59:19 -0400 | [diff] [blame] | 807 | } |
| 808 | } |
stephen hemminger | 292d139 | 2011-11-09 18:30:08 +0000 | [diff] [blame] | 809 | |
roopa | b0a397f | 2013-04-22 12:56:49 +0000 | [diff] [blame] | 810 | modified = true; |
| 811 | } |
Toshiaki Makita | a5642ab | 2014-02-07 16:48:18 +0900 | [diff] [blame] | 812 | fdb->added_by_user = 1; |
roopa | b0a397f | 2013-04-22 12:56:49 +0000 | [diff] [blame] | 813 | |
| 814 | fdb->used = jiffies; |
| 815 | if (modified) { |
| 816 | fdb->updated = jiffies; |
stephen hemminger | 31e8a49c | 2011-12-08 07:17:41 +0000 | [diff] [blame] | 817 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
stephen hemminger | 292d139 | 2011-11-09 18:30:08 +0000 | [diff] [blame] | 818 | } |
| 819 | |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 820 | return 0; |
| 821 | } |
| 822 | |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 823 | static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p, |
| 824 | const unsigned char *addr, u16 nlh_flags, u16 vid) |
| 825 | { |
| 826 | int err = 0; |
| 827 | |
| 828 | if (ndm->ndm_flags & NTF_USE) { |
Nikolay Aleksandrov | c4c832f | 2015-06-06 06:49:00 -0700 | [diff] [blame] | 829 | local_bh_disable(); |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 830 | rcu_read_lock(); |
Toshiaki Makita | a5642ab | 2014-02-07 16:48:18 +0900 | [diff] [blame] | 831 | br_fdb_update(p->br, p, addr, vid, true); |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 832 | rcu_read_unlock(); |
Nikolay Aleksandrov | c4c832f | 2015-06-06 06:49:00 -0700 | [diff] [blame] | 833 | local_bh_enable(); |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 834 | } else { |
| 835 | spin_lock_bh(&p->br->hash_lock); |
| 836 | err = fdb_add_entry(p, addr, ndm->ndm_state, |
| 837 | nlh_flags, vid); |
| 838 | spin_unlock_bh(&p->br->hash_lock); |
| 839 | } |
| 840 | |
| 841 | return err; |
| 842 | } |
| 843 | |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 844 | /* Add new permanent fdb entry with RTM_NEWNEIGH */ |
stephen hemminger | edc7d57 | 2012-10-01 12:32:33 +0000 | [diff] [blame] | 845 | int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
| 846 | struct net_device *dev, |
Jiri Pirko | f6f6424 | 2014-11-28 14:34:15 +0100 | [diff] [blame] | 847 | const unsigned char *addr, u16 vid, u16 nlh_flags) |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 848 | { |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 849 | struct net_bridge_vlan_group *vg; |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 850 | struct net_bridge_port *p = NULL; |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 851 | struct net_bridge_vlan *v; |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 852 | struct net_bridge *br = NULL; |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 853 | int err = 0; |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 854 | |
stephen hemminger | 292d139 | 2011-11-09 18:30:08 +0000 | [diff] [blame] | 855 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { |
| 856 | pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); |
| 857 | return -EINVAL; |
| 858 | } |
| 859 | |
Stephen Hemminger | 537f7f8 | 2013-06-25 09:34:36 -0700 | [diff] [blame] | 860 | if (is_zero_ether_addr(addr)) { |
| 861 | pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n"); |
| 862 | return -EINVAL; |
| 863 | } |
| 864 | |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 865 | if (dev->priv_flags & IFF_EBRIDGE) { |
| 866 | br = netdev_priv(dev); |
| 867 | vg = br_vlan_group(br); |
| 868 | } else { |
| 869 | p = br_port_get_rtnl(dev); |
| 870 | if (!p) { |
| 871 | pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", |
| 872 | dev->name); |
| 873 | return -EINVAL; |
| 874 | } |
| 875 | vg = nbp_vlan_group(p); |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 876 | } |
| 877 | |
Jiri Pirko | f6f6424 | 2014-11-28 14:34:15 +0100 | [diff] [blame] | 878 | if (vid) { |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 879 | v = br_vlan_find(vg, vid); |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 880 | if (!v || !br_vlan_should_use(v)) { |
| 881 | pr_info("bridge: RTM_NEWNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 882 | return -EINVAL; |
| 883 | } |
| 884 | |
| 885 | /* VID was specified, so use it. */ |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 886 | if (dev->priv_flags & IFF_EBRIDGE) |
| 887 | err = br_fdb_insert(br, NULL, addr, vid); |
| 888 | else |
| 889 | err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); |
stephen hemminger | 292d139 | 2011-11-09 18:30:08 +0000 | [diff] [blame] | 890 | } else { |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 891 | if (dev->priv_flags & IFF_EBRIDGE) |
| 892 | err = br_fdb_insert(br, NULL, addr, 0); |
| 893 | else |
| 894 | err = __br_fdb_add(ndm, p, addr, nlh_flags, 0); |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 895 | if (err || !vg || !vg->num_vlans) |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 896 | goto out; |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 897 | |
| 898 | /* We have vlans configured on this port and user didn't |
| 899 | * specify a VLAN. To be nice, add/update entry for every |
| 900 | * vlan on this port. |
| 901 | */ |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 902 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 903 | if (!br_vlan_should_use(v)) |
| 904 | continue; |
| 905 | if (dev->priv_flags & IFF_EBRIDGE) |
| 906 | err = br_fdb_insert(br, NULL, addr, v->vid); |
| 907 | else |
| 908 | err = __br_fdb_add(ndm, p, addr, nlh_flags, |
| 909 | v->vid); |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 910 | if (err) |
| 911 | goto out; |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 912 | } |
stephen hemminger | 292d139 | 2011-11-09 18:30:08 +0000 | [diff] [blame] | 913 | } |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 914 | |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 915 | out: |
| 916 | return err; |
| 917 | } |
| 918 | |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 919 | static int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, |
| 920 | u16 vid) |
| 921 | { |
| 922 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
| 923 | struct net_bridge_fdb_entry *fdb; |
| 924 | |
| 925 | fdb = fdb_find(head, addr, vid); |
| 926 | if (!fdb) |
| 927 | return -ENOENT; |
| 928 | |
| 929 | fdb_delete(br, fdb); |
| 930 | return 0; |
| 931 | } |
| 932 | |
| 933 | static int __br_fdb_delete_by_addr(struct net_bridge *br, |
| 934 | const unsigned char *addr, u16 vid) |
| 935 | { |
| 936 | int err; |
| 937 | |
| 938 | spin_lock_bh(&br->hash_lock); |
| 939 | err = fdb_delete_by_addr(br, addr, vid); |
| 940 | spin_unlock_bh(&br->hash_lock); |
| 941 | |
| 942 | return err; |
| 943 | } |
| 944 | |
Nikolay Aleksandrov | 8c86f96 | 2015-06-09 03:34:13 -0700 | [diff] [blame] | 945 | static int fdb_delete_by_addr_and_port(struct net_bridge_port *p, |
| 946 | const u8 *addr, u16 vlan) |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 947 | { |
Nikolay Aleksandrov | 8c86f96 | 2015-06-09 03:34:13 -0700 | [diff] [blame] | 948 | struct net_bridge *br = p->br; |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 949 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)]; |
| 950 | struct net_bridge_fdb_entry *fdb; |
| 951 | |
| 952 | fdb = fdb_find(head, addr, vlan); |
Nikolay Aleksandrov | 8c86f96 | 2015-06-09 03:34:13 -0700 | [diff] [blame] | 953 | if (!fdb || fdb->dst != p) |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 954 | return -ENOENT; |
| 955 | |
| 956 | fdb_delete(br, fdb); |
| 957 | return 0; |
| 958 | } |
| 959 | |
| 960 | static int __br_fdb_delete(struct net_bridge_port *p, |
| 961 | const unsigned char *addr, u16 vid) |
| 962 | { |
| 963 | int err; |
| 964 | |
| 965 | spin_lock_bh(&p->br->hash_lock); |
Nikolay Aleksandrov | 8c86f96 | 2015-06-09 03:34:13 -0700 | [diff] [blame] | 966 | err = fdb_delete_by_addr_and_port(p, addr, vid); |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 967 | spin_unlock_bh(&p->br->hash_lock); |
| 968 | |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 969 | return err; |
| 970 | } |
| 971 | |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 972 | /* Remove neighbor entry with RTM_DELNEIGH */ |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 973 | int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
| 974 | struct net_device *dev, |
Jiri Pirko | f6f6424 | 2014-11-28 14:34:15 +0100 | [diff] [blame] | 975 | const unsigned char *addr, u16 vid) |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 976 | { |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 977 | struct net_bridge_vlan_group *vg; |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 978 | struct net_bridge_port *p = NULL; |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 979 | struct net_bridge_vlan *v; |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 980 | struct net_bridge *br = NULL; |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 981 | int err; |
| 982 | |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 983 | if (dev->priv_flags & IFF_EBRIDGE) { |
| 984 | br = netdev_priv(dev); |
| 985 | vg = br_vlan_group(br); |
| 986 | } else { |
| 987 | p = br_port_get_rtnl(dev); |
| 988 | if (!p) { |
| 989 | pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", |
| 990 | dev->name); |
| 991 | return -EINVAL; |
| 992 | } |
| 993 | vg = nbp_vlan_group(p); |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 994 | } |
| 995 | |
Jiri Pirko | f6f6424 | 2014-11-28 14:34:15 +0100 | [diff] [blame] | 996 | if (vid) { |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 997 | v = br_vlan_find(vg, vid); |
| 998 | if (!v) { |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 999 | pr_info("bridge: RTM_DELNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 1000 | return -EINVAL; |
| 1001 | } |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 1002 | |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 1003 | if (dev->priv_flags & IFF_EBRIDGE) |
| 1004 | err = __br_fdb_delete_by_addr(br, addr, vid); |
| 1005 | else |
| 1006 | err = __br_fdb_delete(p, addr, vid); |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 1007 | } else { |
Toshiaki Makita | 25d3b49 | 2015-02-09 20:16:17 +0900 | [diff] [blame] | 1008 | err = -ENOENT; |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 1009 | if (dev->priv_flags & IFF_EBRIDGE) |
| 1010 | err = __br_fdb_delete_by_addr(br, addr, 0); |
| 1011 | else |
| 1012 | err &= __br_fdb_delete(p, addr, 0); |
| 1013 | |
Nikolay Aleksandrov | 2594e90 | 2015-09-25 19:00:11 +0200 | [diff] [blame] | 1014 | if (!vg || !vg->num_vlans) |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 1015 | goto out; |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 1016 | |
Roopa Prabhu | 3741873 | 2015-10-08 10:38:52 -0700 | [diff] [blame] | 1017 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
| 1018 | if (!br_vlan_should_use(v)) |
| 1019 | continue; |
| 1020 | if (dev->priv_flags & IFF_EBRIDGE) |
| 1021 | err = __br_fdb_delete_by_addr(br, addr, v->vid); |
| 1022 | else |
| 1023 | err &= __br_fdb_delete(p, addr, v->vid); |
| 1024 | } |
Vlad Yasevich | 1690be6 | 2013-02-13 12:00:18 +0000 | [diff] [blame] | 1025 | } |
| 1026 | out: |
stephen hemminger | 36fd2b6 | 2011-04-04 14:03:31 +0000 | [diff] [blame] | 1027 | return err; |
| 1028 | } |
Vlad Yasevich | 8db24af | 2014-05-16 09:59:17 -0400 | [diff] [blame] | 1029 | |
| 1030 | int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p) |
| 1031 | { |
| 1032 | struct net_bridge_fdb_entry *fdb, *tmp; |
| 1033 | int i; |
| 1034 | int err; |
| 1035 | |
| 1036 | ASSERT_RTNL(); |
| 1037 | |
| 1038 | for (i = 0; i < BR_HASH_SIZE; i++) { |
| 1039 | hlist_for_each_entry(fdb, &br->hash[i], hlist) { |
| 1040 | /* We only care for static entries */ |
| 1041 | if (!fdb->is_static) |
| 1042 | continue; |
| 1043 | |
| 1044 | err = dev_uc_add(p->dev, fdb->addr.addr); |
| 1045 | if (err) |
| 1046 | goto rollback; |
| 1047 | } |
| 1048 | } |
| 1049 | return 0; |
| 1050 | |
| 1051 | rollback: |
| 1052 | for (i = 0; i < BR_HASH_SIZE; i++) { |
| 1053 | hlist_for_each_entry(tmp, &br->hash[i], hlist) { |
| 1054 | /* If we reached the fdb that failed, we can stop */ |
| 1055 | if (tmp == fdb) |
| 1056 | break; |
| 1057 | |
| 1058 | /* We only care for static entries */ |
| 1059 | if (!tmp->is_static) |
| 1060 | continue; |
| 1061 | |
| 1062 | dev_uc_del(p->dev, tmp->addr.addr); |
| 1063 | } |
| 1064 | } |
| 1065 | return err; |
| 1066 | } |
| 1067 | |
| 1068 | void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) |
| 1069 | { |
| 1070 | struct net_bridge_fdb_entry *fdb; |
| 1071 | int i; |
| 1072 | |
| 1073 | ASSERT_RTNL(); |
| 1074 | |
| 1075 | for (i = 0; i < BR_HASH_SIZE; i++) { |
| 1076 | hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) { |
| 1077 | /* We only care for static entries */ |
| 1078 | if (!fdb->is_static) |
| 1079 | continue; |
| 1080 | |
| 1081 | dev_uc_del(p->dev, fdb->addr.addr); |
| 1082 | } |
| 1083 | } |
| 1084 | } |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 1085 | |
Jiri Pirko | 3aeb661 | 2015-01-15 23:49:37 +0100 | [diff] [blame] | 1086 | int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 1087 | const unsigned char *addr, u16 vid) |
| 1088 | { |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 1089 | struct hlist_head *head; |
| 1090 | struct net_bridge_fdb_entry *fdb; |
| 1091 | int err = 0; |
| 1092 | |
Jiri Pirko | 3aeb661 | 2015-01-15 23:49:37 +0100 | [diff] [blame] | 1093 | ASSERT_RTNL(); |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 1094 | spin_lock_bh(&br->hash_lock); |
| 1095 | |
| 1096 | head = &br->hash[br_mac_hash(addr, vid)]; |
| 1097 | fdb = fdb_find(head, addr, vid); |
| 1098 | if (!fdb) { |
| 1099 | fdb = fdb_create(head, p, addr, vid); |
| 1100 | if (!fdb) { |
| 1101 | err = -ENOMEM; |
| 1102 | goto err_unlock; |
| 1103 | } |
| 1104 | fdb->added_by_external_learn = 1; |
| 1105 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
| 1106 | } else if (fdb->added_by_external_learn) { |
| 1107 | /* Refresh entry */ |
| 1108 | fdb->updated = fdb->used = jiffies; |
| 1109 | } else if (!fdb->added_by_user) { |
| 1110 | /* Take over SW learned entry */ |
| 1111 | fdb->added_by_external_learn = 1; |
| 1112 | fdb->updated = jiffies; |
| 1113 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
| 1114 | } |
| 1115 | |
| 1116 | err_unlock: |
| 1117 | spin_unlock_bh(&br->hash_lock); |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 1118 | |
| 1119 | return err; |
| 1120 | } |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 1121 | |
Jiri Pirko | 3aeb661 | 2015-01-15 23:49:37 +0100 | [diff] [blame] | 1122 | int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 1123 | const unsigned char *addr, u16 vid) |
| 1124 | { |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 1125 | struct hlist_head *head; |
| 1126 | struct net_bridge_fdb_entry *fdb; |
| 1127 | int err = 0; |
| 1128 | |
Jiri Pirko | 3aeb661 | 2015-01-15 23:49:37 +0100 | [diff] [blame] | 1129 | ASSERT_RTNL(); |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 1130 | spin_lock_bh(&br->hash_lock); |
| 1131 | |
| 1132 | head = &br->hash[br_mac_hash(addr, vid)]; |
| 1133 | fdb = fdb_find(head, addr, vid); |
| 1134 | if (fdb && fdb->added_by_external_learn) |
| 1135 | fdb_delete(br, fdb); |
| 1136 | else |
| 1137 | err = -ENOENT; |
| 1138 | |
| 1139 | spin_unlock_bh(&br->hash_lock); |
Scott Feldman | cf6b8e1 | 2014-11-28 14:34:21 +0100 | [diff] [blame] | 1140 | |
| 1141 | return err; |
| 1142 | } |