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Date: Wed, 19 Sep 2012 08:42:11 -0400
From: Vlad Yasevich <vyasevic@...hat.com>
To: netdev@...r.kernel.org
Cc: shemminger@...tta.com, Vlad Yasevich <vyasevic@...hat.com>
Subject: [RFC PATCHv2 bridge 2/7] bridge: Add vlan to unicast fdb entries
This patch adds vlan to unicast fdb entries that are created for
learned addresses (not the manually configured ones). It adds
vlan id into the hash mix and uses vlan as an addditional parameter
for an entry match.
Signed-off-by: Vlad Yasevich <vyasevic@...hat.com>
---
include/linux/if_bridge.h | 2 +-
net/bridge/br_device.c | 2 +-
net/bridge/br_fdb.c | 71 ++++++++++++++++++++++++++------------------
net/bridge/br_input.c | 7 ++--
net/bridge/br_private.h | 7 +++-
5 files changed, 53 insertions(+), 36 deletions(-)
diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h
index dd3f201..8476d6f 100644
--- a/include/linux/if_bridge.h
+++ b/include/linux/if_bridge.h
@@ -94,7 +94,7 @@ struct __fdb_entry {
__u32 ageing_timer_value;
__u8 port_hi;
__u8 pad0;
- __u16 unused;
+ __u16 fdb_vid;
};
#ifdef __KERNEL__
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 070e8a6..bf08c09 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -67,7 +67,7 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
br_multicast_deliver(mdst, skb);
else
br_flood_deliver(br, skb);
- } else if ((dst = __br_fdb_get(br, dest)) != NULL)
+ } else if ((dst = __br_fdb_get(br, dest, br_get_vlan(skb))) != NULL)
br_deliver(dst->dst, skb);
else
br_flood_deliver(br, skb);
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index 9ce430b..e17f9f2 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -23,6 +23,7 @@
#include <linux/slab.h>
#include <linux/atomic.h>
#include <asm/unaligned.h>
+#include <linux/if_vlan.h>
#include "br_private.h"
static struct kmem_cache *br_fdb_cache __read_mostly;
@@ -67,11 +68,12 @@ static inline int has_expired(const struct net_bridge *br,
time_before_eq(fdb->updated + hold_time(br), jiffies);
}
-static inline int br_mac_hash(const unsigned char *mac)
+static inline int br_mac_hash(const unsigned char *mac, __u16 vlan_tci)
{
- /* use 1 byte of OUI cnd 3 bytes of NIC */
+ /* use 1 byte of OUI and 3 bytes of NIC */
u32 key = get_unaligned((u32 *)(mac + 2));
- return jhash_1word(key, fdb_salt) & (BR_HASH_SIZE - 1);
+ return jhash_2words(key, (vlan_tci & VLAN_VID_MASK),
+ fdb_salt) & (BR_HASH_SIZE - 1);
}
static void fdb_rcu_free(struct rcu_head *head)
@@ -132,7 +134,7 @@ void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr)
struct net_bridge_fdb_entry *f;
/* If old entry was unassociated with any port, then delete it. */
- f = __br_fdb_get(br, br->dev->dev_addr);
+ f = __br_fdb_get(br, br->dev->dev_addr, 0);
if (f && f->is_local && !f->dst)
fdb_delete(br, f);
@@ -231,13 +233,16 @@ void br_fdb_delete_by_port(struct net_bridge *br,
/* No locking or refcounting, assumes caller has rcu_read_lock */
struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
- const unsigned char *addr)
+ const unsigned char *addr,
+ __u16 vlan_tci)
{
struct hlist_node *h;
struct net_bridge_fdb_entry *fdb;
- hlist_for_each_entry_rcu(fdb, h, &br->hash[br_mac_hash(addr)], hlist) {
- if (ether_addr_equal(fdb->addr.addr, addr)) {
+ hlist_for_each_entry_rcu(fdb, h,
+ &br->hash[br_mac_hash(addr, vlan_tci)], hlist) {
+ if (ether_addr_equal(fdb->addr.addr, addr) &&
+ fdb->vlan_id == (vlan_tci & VLAN_VID_MASK) ) {
if (unlikely(has_expired(br, fdb)))
break;
return fdb;
@@ -261,7 +266,7 @@ int br_fdb_test_addr(struct net_device *dev, unsigned char *addr)
if (!port)
ret = 0;
else {
- fdb = __br_fdb_get(port->br, addr);
+ fdb = __br_fdb_get(port->br, addr, 0);
ret = fdb && fdb->dst && fdb->dst->dev != dev &&
fdb->dst->state == BR_STATE_FORWARDING;
}
@@ -313,6 +318,7 @@ int br_fdb_fillbuf(struct net_bridge *br, void *buf,
fe->is_local = f->is_local;
if (!f->is_static)
fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated);
+ fe->fdb_vid = f->vlan_id;
++fe;
++num;
}
@@ -325,26 +331,30 @@ int br_fdb_fillbuf(struct net_bridge *br, void *buf,
}
static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head,
- const unsigned char *addr)
+ const unsigned char *addr,
+ __u16 vlan_tci)
{
struct hlist_node *h;
struct net_bridge_fdb_entry *fdb;
hlist_for_each_entry(fdb, h, head, hlist) {
- if (ether_addr_equal(fdb->addr.addr, addr))
+ if (ether_addr_equal(fdb->addr.addr, addr) &&
+ fdb->vlan_id == (vlan_tci & VLAN_VID_MASK))
return fdb;
}
return NULL;
}
static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head,
- const unsigned char *addr)
+ const unsigned char *addr,
+ __u16 vlan_tci)
{
struct hlist_node *h;
struct net_bridge_fdb_entry *fdb;
hlist_for_each_entry_rcu(fdb, h, head, hlist) {
- if (ether_addr_equal(fdb->addr.addr, addr))
+ if (ether_addr_equal(fdb->addr.addr, addr) &&
+ fdb->vlan_id == (vlan_tci & VLAN_VID_MASK))
return fdb;
}
return NULL;
@@ -352,7 +362,8 @@ static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head,
static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
struct net_bridge_port *source,
- const unsigned char *addr)
+ const unsigned char *addr,
+ __u16 vlan_tci)
{
struct net_bridge_fdb_entry *fdb;
@@ -360,6 +371,7 @@ static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
if (fdb) {
memcpy(fdb->addr.addr, addr, ETH_ALEN);
fdb->dst = source;
+ fdb->vlan_id = (vlan_tci & VLAN_VID_MASK);
fdb->is_local = 0;
fdb->is_static = 0;
fdb->updated = fdb->used = jiffies;
@@ -371,13 +383,13 @@ static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
const unsigned char *addr)
{
- struct hlist_head *head = &br->hash[br_mac_hash(addr)];
+ struct hlist_head *head = &br->hash[br_mac_hash(addr, 0)];
struct net_bridge_fdb_entry *fdb;
if (!is_valid_ether_addr(addr))
return -EINVAL;
- fdb = fdb_find(head, addr);
+ fdb = fdb_find(head, addr, 0);
if (fdb) {
/* it is okay to have multiple ports with same
* address, just use the first one.
@@ -390,7 +402,7 @@ static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
fdb_delete(br, fdb);
}
- fdb = fdb_create(head, source, addr);
+ fdb = fdb_create(head, source, addr, 0);
if (!fdb)
return -ENOMEM;
@@ -412,9 +424,9 @@ int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
}
void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
- const unsigned char *addr)
+ const unsigned char *addr, __u16 vlan_tci)
{
- struct hlist_head *head = &br->hash[br_mac_hash(addr)];
+ struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan_tci)];
struct net_bridge_fdb_entry *fdb;
/* some users want to always flood. */
@@ -426,7 +438,7 @@ void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
source->state == BR_STATE_FORWARDING))
return;
- fdb = fdb_find_rcu(head, addr);
+ fdb = fdb_find_rcu(head, addr, vlan_tci);
if (likely(fdb)) {
/* attempt to update an entry for a local interface */
if (unlikely(fdb->is_local)) {
@@ -441,8 +453,8 @@ void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
}
} else {
spin_lock(&br->hash_lock);
- if (likely(!fdb_find(head, addr))) {
- fdb = fdb_create(head, source, addr);
+ if (likely(!fdb_find(head, addr, vlan_tci))) {
+ fdb = fdb_create(head, source, addr, vlan_tci);
if (fdb)
fdb_notify(br, fdb, RTM_NEWNEIGH);
}
@@ -571,18 +583,18 @@ out:
/* Update (create or replace) forwarding database entry */
static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr,
- __u16 state, __u16 flags)
+ __u16 state, __u16 flags, __u16 vlan_tci)
{
struct net_bridge *br = source->br;
- struct hlist_head *head = &br->hash[br_mac_hash(addr)];
+ struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan_tci)];
struct net_bridge_fdb_entry *fdb;
- fdb = fdb_find(head, addr);
+ fdb = fdb_find(head, addr, vlan_tci);
if (fdb == NULL) {
if (!(flags & NLM_F_CREATE))
return -ENOENT;
- fdb = fdb_create(head, source, addr);
+ fdb = fdb_create(head, source, addr, vlan_tci);
if (!fdb)
return -ENOMEM;
fdb_notify(br, fdb, RTM_NEWNEIGH);
@@ -628,11 +640,12 @@ int br_fdb_add(struct ndmsg *ndm, struct net_device *dev,
if (ndm->ndm_flags & NTF_USE) {
rcu_read_lock();
- br_fdb_update(p->br, p, addr);
+ br_fdb_update(p->br, p, addr, 0);
rcu_read_unlock();
} else {
spin_lock_bh(&p->br->hash_lock);
- err = fdb_add_entry(p, addr, ndm->ndm_state, nlh_flags);
+ err = fdb_add_entry(p, addr, ndm->ndm_state, nlh_flags,
+ 0);
spin_unlock_bh(&p->br->hash_lock);
}
@@ -642,10 +655,10 @@ int br_fdb_add(struct ndmsg *ndm, struct net_device *dev,
static int fdb_delete_by_addr(struct net_bridge_port *p, u8 *addr)
{
struct net_bridge *br = p->br;
- struct hlist_head *head = &br->hash[br_mac_hash(addr)];
+ struct hlist_head *head = &br->hash[br_mac_hash(addr, 0)];
struct net_bridge_fdb_entry *fdb;
- fdb = fdb_find(head, addr);
+ fdb = fdb_find(head, addr, 0);
if (!fdb)
return -ENOENT;
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 44f352d..c4f0020 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -71,7 +71,7 @@ int br_handle_frame_finish(struct sk_buff *skb)
/* insert into forwarding database after filtering to avoid spoofing */
br = p->br;
- br_fdb_update(br, p, eth_hdr(skb)->h_source);
+ br_fdb_update(br, p, eth_hdr(skb)->h_source, vid);
if (!is_broadcast_ether_addr(dest) && is_multicast_ether_addr(dest) &&
br_multicast_rcv(br, p, skb))
@@ -106,7 +106,8 @@ int br_handle_frame_finish(struct sk_buff *skb)
skb2 = skb;
br->dev->stats.multicast++;
- } else if ((dst = __br_fdb_get(br, dest)) && dst->is_local) {
+ } else if ((dst = __br_fdb_get(br, dest, vid)) &&
+ dst->is_local) {
skb2 = skb;
/* Do not forward the packet since it's local. */
skb = NULL;
@@ -135,7 +136,7 @@ static int br_handle_local_finish(struct sk_buff *skb)
{
struct net_bridge_port *p = br_port_get_rcu(skb->dev);
- br_fdb_update(p->br, p, eth_hdr(skb)->h_source);
+ br_fdb_update(p->br, p, eth_hdr(skb)->h_source, br_get_vlan(skb));
return 0; /* process further */
}
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index baf1835..bb382f1 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -73,6 +73,7 @@ struct net_bridge_fdb_entry
unsigned long updated;
unsigned long used;
mac_addr addr;
+ __u16 vlan_id;
unsigned char is_local;
unsigned char is_static;
};
@@ -367,7 +368,8 @@ extern void br_fdb_cleanup(unsigned long arg);
extern void br_fdb_delete_by_port(struct net_bridge *br,
const struct net_bridge_port *p, int do_all);
extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
- const unsigned char *addr);
+ const unsigned char *addr,
+ __u16 vlan_tci);
extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
unsigned long count, unsigned long off);
@@ -376,7 +378,8 @@ extern int br_fdb_insert(struct net_bridge *br,
const unsigned char *addr);
extern void br_fdb_update(struct net_bridge *br,
struct net_bridge_port *source,
- const unsigned char *addr);
+ const unsigned char *addr,
+ __u16 vlan_tci);
extern int br_fdb_delete(struct ndmsg *ndm,
struct net_device *dev,
--
1.7.7.6
--
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