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act_mirred: get rid of tcfm_ifindex from struct tcf_mirred

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tcfm_dev always points to the correct netdev and we already
hold a refcnt, so no need to use tcfm_ifindex to lookup again.

If we would support moving target netdev across netns, using
pointer would be better than ifindex.

This also fixes dumping obsolete ifindex, now after the
target device is gone we just dump 0 as ifindex.

Cc: Jiri Pirko <[email protected]>
Cc: Jamal Hadi Salim <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Acked-by: Jiri Pirko <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Cong Wang 2017-12-05 16:17:26 -08:00 • committed by David S. Miller
commit 9f8a739e72
11 changed files with 26 additions and 41 deletions
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5
net/dsa/slave.c
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@ -709,14 +709,12 @@ static int dsa_slave_add_cls_matchall(struct net_device *dev,
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_mall_tc_entry *mall_tc_entry;
__be16 protocol = cls->common.protocol;
struct net *net = dev_net(dev);
struct dsa_switch *ds = dp->ds;
struct net_device *to_dev;
const struct tc_action *a;
struct dsa_port *to_dp;
int err = -EOPNOTSUPP;
LIST_HEAD(actions);
int ifindex;
if (!ds->ops->port_mirror_add)
return err;
@ -730,8 +728,7 @@ static int dsa_slave_add_cls_matchall(struct net_device *dev,
if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) {
struct dsa_mall_mirror_tc_entry *mirror;
ifindex = tcf_mirred_ifindex(a);
to_dev = __dev_get_by_index(net, ifindex);
to_dev = tcf_mirred_dev(a);
if (!to_dev)
return -EINVAL;