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net: dsa: add switch mdb bitmap functions 

This patch brings no functional changes.
It moves out the MDB code iterating on a multicast group into new
dsa_switch_mdb_{prepare,add}_bitmap() functions.

This gives us a better isolation of the two switchdev phases.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2017-11-30 11:24:00 -05:00 committed by David S. Miller
parent 9c428c593f
commit e6db98db8a
1 changed files with 33 additions and 15 deletions
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48
net/dsa/switch.c
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@ -108,13 +108,42 @@ static int dsa_switch_fdb_del(struct dsa_switch *ds,
info->vid);
}
static int
dsa_switch_mdb_prepare_bitmap(struct dsa_switch *ds,
const struct switchdev_obj_port_mdb *mdb,
const unsigned long *bitmap)
{
int port, err;
if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
return -EOPNOTSUPP;
for_each_set_bit(port, bitmap, ds->num_ports) {
err = ds->ops->port_mdb_prepare(ds, port, mdb);
if (err)
return err;
}
return 0;
}
static void dsa_switch_mdb_add_bitmap(struct dsa_switch *ds,
const struct switchdev_obj_port_mdb *mdb,
const unsigned long *bitmap)
{
int port;
for_each_set_bit(port, bitmap, ds->num_ports)
ds->ops->port_mdb_add(ds, port, mdb);
}
static int dsa_switch_mdb_add(struct dsa_switch *ds,
struct dsa_notifier_mdb_info *info)
{
const struct switchdev_obj_port_mdb *mdb = info->mdb;
struct switchdev_trans *trans = info->trans;
DECLARE_BITMAP(group, ds->num_ports);
int port, err;
int port;
/* Build a mask of Multicast group members */
bitmap_zero(group, ds->num_ports);
@ -124,21 +153,10 @@ static int dsa_switch_mdb_add(struct dsa_switch *ds,
if (dsa_is_dsa_port(ds, port))
set_bit(port, group);
if (switchdev_trans_ph_prepare(trans)) {
if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
return -EOPNOTSUPP;
if (switchdev_trans_ph_prepare(trans))
return dsa_switch_mdb_prepare_bitmap(ds, mdb, group);
for_each_set_bit(port, group, ds->num_ports) {
err = ds->ops->port_mdb_prepare(ds, port, mdb);
if (err)
return err;
}
return 0;
}
for_each_set_bit(port, group, ds->num_ports)
ds->ops->port_mdb_add(ds, port, mdb);
dsa_switch_mdb_add_bitmap(ds, mdb, group);
return 0;
}