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net: bridge: fdb: br_fdb_update can take flags directly

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If we modify br_fdb_update() to take flags directly we can get rid of
one test and one atomic bitop in the learning path.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2019-11-01 14:46:37 +02:00 committed by David S. Miller
parent 52340b82cf
commit be0c567797
4 changed files with 15 additions and 18 deletions
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12
include/trace/events/bridge.h
View File

@ -95,16 +95,16 @@ TRACE_EVENT(fdb_delete,
TRACE_EVENT(br_fdb_update,
TP_PROTO(struct net_bridge *br, struct net_bridge_port *source,
const unsigned char *addr, u16 vid, bool added_by_user),
const unsigned char *addr, u16 vid, unsigned long flags),
TP_ARGS(br, source, addr, vid, added_by_user),
TP_ARGS(br, source, addr, vid, flags),
TP_STRUCT__entry(
__string(br_dev, br->dev->name)
__string(dev, source->dev->name)
__array(unsigned char, addr, ETH_ALEN)
__field(u16, vid)
__field(bool, added_by_user)
__field(unsigned long, flags)
),
TP_fast_assign(
@ -112,14 +112,14 @@ TRACE_EVENT(br_fdb_update,
__assign_str(dev, source->dev->name);
memcpy(__entry->addr, addr, ETH_ALEN);
__entry->vid = vid;
__entry->added_by_user = added_by_user;
__entry->flags = flags;
),
TP_printk("br_dev %s source %s addr %02x:%02x:%02x:%02x:%02x:%02x vid %u added_by_user %d",
TP_printk("br_dev %s source %s addr %02x:%02x:%02x:%02x:%02x:%02x vid %u flags 0x%lx",
__get_str(br_dev), __get_str(dev), __entry->addr[0],
__entry->addr[1], __entry->addr[2], __entry->addr[3],
__entry->addr[4], __entry->addr[5], __entry->vid,
__entry->added_by_user)
__entry->flags)
);

15
net/bridge/br_fdb.c
View File

@ -557,7 +557,7 @@ 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, u16 vid, bool added_by_user)
const unsigned char *addr, u16 vid, unsigned long flags)
{
struct net_bridge_fdb_entry *fdb;
bool fdb_modified = false;
@ -592,21 +592,18 @@ void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
}
if (now != fdb->updated)
fdb->updated = now;
if (unlikely(added_by_user))
if (unlikely(test_bit(BR_FDB_ADDED_BY_USER, &flags)))
set_bit(BR_FDB_ADDED_BY_USER, &fdb->flags);
if (unlikely(fdb_modified)) {
trace_br_fdb_update(br, source, addr, vid, added_by_user);
trace_br_fdb_update(br, source, addr, vid, flags);
fdb_notify(br, fdb, RTM_NEWNEIGH, true);
}
}
} else {
spin_lock(&br->hash_lock);
fdb = fdb_create(br, source, addr, vid, 0);
fdb = fdb_create(br, source, addr, vid, flags);
if (fdb) {
if (unlikely(added_by_user))
set_bit(BR_FDB_ADDED_BY_USER, &fdb->flags);
trace_br_fdb_update(br, source, addr, vid,
added_by_user);
trace_br_fdb_update(br, source, addr, vid, flags);
fdb_notify(br, fdb, RTM_NEWNEIGH, true);
}
/* else we lose race and someone else inserts
@ -889,7 +886,7 @@ static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge *br,
}
local_bh_disable();
rcu_read_lock();
br_fdb_update(br, p, addr, vid, true);
br_fdb_update(br, p, addr, vid, BIT(BR_FDB_ADDED_BY_USER));
rcu_read_unlock();
local_bh_enable();
} else if (ndm->ndm_flags & NTF_EXT_LEARNED) {

4
net/bridge/br_input.c
View File

@ -88,7 +88,7 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
/* insert into forwarding database after filtering to avoid spoofing */
br = p->br;
if (p->flags & BR_LEARNING)
br_fdb_update(br, p, eth_hdr(skb)->h_source, vid, false);
br_fdb_update(br, p, eth_hdr(skb)->h_source, vid, 0);
local_rcv = !!(br->dev->flags & IFF_PROMISC);
if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) {
@ -184,7 +184,7 @@ static void __br_handle_local_finish(struct sk_buff *skb)
if ((p->flags & BR_LEARNING) &&
!br_opt_get(p->br, BROPT_NO_LL_LEARN) &&
br_should_learn(p, skb, &vid))
br_fdb_update(p->br, p, eth_hdr(skb)->h_source, vid, false);
br_fdb_update(p->br, p, eth_hdr(skb)->h_source, vid, 0);
}
/* note: already called with rcu_read_lock */

2
net/bridge/br_private.h
View File

@ -571,7 +571,7 @@ int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
const unsigned char *addr, u16 vid);
void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
const unsigned char *addr, u16 vid, bool added_by_user);
const unsigned char *addr, u16 vid, unsigned long flags);
int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
struct net_device *dev, const unsigned char *addr, u16 vid);