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net: bridge: add a flag to avoid refreshing fdb when changing/adding 

When we modify or create a new fdb entry sometimes we want to avoid
refreshing its activity in order to track it properly. One example is
when a mac is received from EVPN multi-homing peer by FRR, which doesn't
want to change local activity accounting. It makes it static and sets a
flag to track its activity.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2020-06-23 23:47:18 +03:00 committed by David S. Miller
parent 31cbc39b63
commit b5f1d9ec28
2 changed files with 5 additions and 1 deletions
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1
include/uapi/linux/neighbour.h
View File

@ -191,6 +191,7 @@ enum {
enum {
NFEA_UNSPEC,
NFEA_ACTIVITY_NOTIFY,
NFEA_DONT_REFRESH,
__NFEA_MAX
};
#define NFEA_MAX (__NFEA_MAX - 1)

5
net/bridge/br_fdb.c
View File

@ -860,6 +860,7 @@ static int fdb_add_entry(struct net_bridge *br, struct net_bridge_port *source,
struct nlattr *nfea_tb[])
{
bool is_sticky = !!(ndm->ndm_flags & NTF_STICKY);
bool refresh = !nfea_tb[NFEA_DONT_REFRESH];
struct net_bridge_fdb_entry *fdb;
u16 state = ndm->ndm_state;
bool modified = false;
@ -937,7 +938,8 @@ static int fdb_add_entry(struct net_bridge *br, struct net_bridge_port *source,
fdb->used = jiffies;
if (modified) {
fdb->updated = jiffies;
if (refresh)
fdb->updated = jiffies;
fdb_notify(br, fdb, RTM_NEWNEIGH, true);
}
@ -977,6 +979,7 @@ static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge *br,
static const struct nla_policy br_nda_fdb_pol[NFEA_MAX + 1] = {
[NFEA_ACTIVITY_NOTIFY] = { .type = NLA_U8 },
[NFEA_DONT_REFRESH] = { .type = NLA_FLAG },
};
/* Add new permanent fdb entry with RTM_NEWNEIGH */