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net: dsa: sja1105: be stateless when installing FDB entries 

Currently there are issues when adding a bridge FDB entry as VLAN-aware
and deleting it as VLAN-unaware, or vice versa.

However this is an unneeded complication, since the bridge always
installs its default FDB entries in VLAN 0 to match on VLAN-unaware
ports, and in the default_pvid (VLAN 1) to match on VLAN-aware ports.
So instead of trying to outsmart the bridge, just install all entries it
gives us, and they will start matching packets when the vlan_filtering
mode changes.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2021-07-28 21:53:15 +03:00 committed by David S. Miller
parent b0fdb99943
commit b11f0a4c0c
2 changed files with 3 additions and 18 deletions
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6
drivers/net/dsa/sja1105/sja1105_dynamic_config.c
View File

@ -1354,14 +1354,14 @@ u8 sja1105et_fdb_hash(struct sja1105_private *priv, const u8 *addr, u16 vid)
{
struct sja1105_l2_lookup_params_entry *l2_lookup_params =
priv->static_config.tables[BLK_IDX_L2_LOOKUP_PARAMS].entries;
u64 poly_koopman = l2_lookup_params->poly;
u64 input, poly_koopman = l2_lookup_params->poly;
/* Convert polynomial from Koopman to 'normal' notation */
u8 poly = (u8)(1 + (poly_koopman << 1));
u64 vlanid = l2_lookup_params->shared_learn ? 0 : vid;
u64 input = (vlanid << 48) | ether_addr_to_u64(addr);
u8 crc = 0; /* seed */
int i;
input = ((u64)vid << 48) | ether_addr_to_u64(addr);
/* Mask the eight bytes starting from MSB one at a time */
for (i = 56; i >= 0; i -= 8) {
u8 byte = (input & (0xffull << i)) >> i;

15
drivers/net/dsa/sja1105/sja1105_main.c
View File

@ -1501,18 +1501,6 @@ static int sja1105_fdb_add(struct dsa_switch *ds, int port,
{
struct sja1105_private *priv = ds->priv;
/* dsa_8021q is in effect when the bridge's vlan_filtering isn't,
* so the switch still does some VLAN processing internally.
* But Shared VLAN Learning (SVL) is also active, and it will take
* care of autonomous forwarding between the unique pvid's of each
* port. Here we just make sure that users can't add duplicate FDB
* entries when in this mode - the actual VID doesn't matter except
* for what gets printed in 'bridge fdb show'. In the case of zero,
* no VID gets printed at all.
*/
if (!priv->vlan_aware)
vid = 0;
return priv->info->fdb_add_cmd(ds, port, addr, vid);
}
@ -1521,9 +1509,6 @@ static int sja1105_fdb_del(struct dsa_switch *ds, int port,
{
struct sja1105_private *priv = ds->priv;
if (!priv->vlan_aware)
vid = 0;
return priv->info->fdb_del_cmd(ds, port, addr, vid);
}