[PATCH net-next v8 4/5] net/sched: act_mirred: Add helper function tcf_mirred_replace_dev
From: Victor Nogueira <hidden>
Date: 2023-12-19 18:16:46
Subsystem:
networking [general], tc subsystem, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Jamal Hadi Salim, Jiri Pirko, Linus Torvalds
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 <redacted> Signed-off-by: Pedro Tammela <redacted> Signed-off-by: Victor Nogueira <redacted> --- net/sched/act_mirred.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c
index 6f2544c1e396..a1be8f3c4a8e 100644
--- a/net/sched/act_mirred.c
+++ b/net/sched/act_mirred.c@@ -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; }
--
2.25.1