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net/sched: act_mirred: Add helper function tcf_mirred_replace_dev

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The act of replacing a device will be repeated by the init logic for the
block ID in the patch that allows mirred to a block. Therefore we
encapsulate this functionality in a function (tcf_mirred_replace_dev) so
that we can reuse it and avoid code repetition.

Co-developed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Co-developed-by: Pedro Tammela <pctammela@mojatatu.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Signed-off-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Victor Nogueira 2023-12-19 15:16:22 -03:00 committed by David S. Miller
parent 16085e48cb
commit 415e38bf1d
1 changed files with 12 additions and 4 deletions
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16
net/sched/act_mirred.c
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@ -89,6 +89,16 @@ static const struct nla_policy mirred_policy[TCA_MIRRED_MAX + 1] = {
static struct tc_action_ops act_mirred_ops;
static void tcf_mirred_replace_dev(struct tcf_mirred *m,
struct net_device *ndev)
{
struct net_device *odev;
odev = rcu_replace_pointer(m->tcfm_dev, ndev,
lockdep_is_held(&m->tcf_lock));
netdev_put(odev, &m->tcfm_dev_tracker);
}
static int tcf_mirred_init(struct net *net, struct nlattr *nla,
struct nlattr *est, struct tc_action **a,
struct tcf_proto *tp,
@ -170,7 +180,7 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
spin_lock_bh(&m->tcf_lock);
if (parm->ifindex) {
struct net_device *odev, *ndev;
struct net_device *ndev;
ndev = dev_get_by_index(net, parm->ifindex);
if (!ndev) {
@ -179,9 +189,7 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
goto put_chain;
}
mac_header_xmit = dev_is_mac_header_xmit(ndev);
odev = rcu_replace_pointer(m->tcfm_dev, ndev,
lockdep_is_held(&m->tcf_lock));
netdev_put(odev, &m->tcfm_dev_tracker);
tcf_mirred_replace_dev(m, ndev);
netdev_tracker_alloc(ndev, &m->tcfm_dev_tracker, GFP_ATOMIC);
m->tcfm_mac_header_xmit = mac_header_xmit;
}